Update release action

Merge branch 'main' of github.com:ClusterCockpit/cc-metric-collector into main
Update Release.yml
2025-07-19 11:21:41 +02:00 · 2022-06-09 14:36:25 +02:00 · 2022-06-09 12:46:47 +02:00 · 2022-06-09 12:42:11 +02:00 · 2022-06-08 15:26:05 +02:00 · 2022-06-08 15:25:40 +02:00
59 changed files with 2771 additions and 833 deletions
--- a/.github/ci-config.json
+++ b/.github/ci-config.json
@@ -3,6 +3,6 @@
  "collectors" : ".github/ci-collectors.json",
  "receivers" : ".github/ci-receivers.json",
  "router" : ".github/ci-router.json",
-  "interval": 5,
-  "duration": 1
+  "interval": "5s",
+  "duration": "1s"
 }
--- a/.github/ci-sinks.json
+++ b/.github/ci-sinks.json
@@ -1,6 +1,8 @@
 {
  "testoutput" : {
    "type" : "stdout",
-    "meta_as_tags" : true
+    "meta_as_tags" : [
+      "unit"
+    ]
  }
 }
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -40,12 +40,15 @@ jobs:

    # Use dnf to install build dependencies
    - name: Install build dependencies
-      run: dnf --assumeyes builddep scripts/cc-metric-collector.spec
+      run: |
+        dnf --assumeyes install 'dnf-command(builddep)'
+        dnf --assumeyes install which
+        dnf --assumeyes builddep scripts/cc-metric-collector.spec

    - name: RPM build MetricCollector
      id: rpmbuild
      run: make RPM
-    
+
    # AlmaLinux 8.5 is a derivate of RedHat Enterprise Linux 8 (UBI8),
    # so the created RPM both contain the substring 'el8' in the RPM file names
    # This step replaces the substring 'el8' to 'alma85'. It uses the move operation
@@ -181,4 +184,4 @@ jobs:
         ${{ steps.files.outputs.ALMA_85_RPM }}
         ${{ steps.files.outputs.ALMA_85_SRPM }}
         ${{ steps.files.outputs.UBI_8_RPM }}
-         ${{ steps.files.outputs.UBI_8_SRPM }}
+         ${{ steps.files.outputs.UBI_8_SRPM }}
--- a/.github/workflows/runonce.yml
+++ b/.github/workflows/runonce.yml
@@ -7,6 +7,32 @@ name: Run Test
 on: push

 jobs:
+  #
+  # Job build-1-18
+  # Build on latest Ubuntu using golang version 1.18
+  #
+  build-1-18:
+    runs-on: ubuntu-latest
+    steps:
+    # See: https://github.com/marketplace/actions/checkout
+    # Checkout git repository and submodules
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: recursive
+
+    # See: https://github.com/marketplace/actions/setup-go-environment
+    - name: Setup Golang
+      uses: actions/setup-go@v3
+      with:
+        go-version: '1.18.2'
+
+    - name: Build MetricCollector
+      run: make
+
+    - name: Run MetricCollector once
+      run: ./cc-metric-collector --once --config .github/ci-config.json
+
  #
  # Job build-1-17
  # Build on latest Ubuntu using golang version 1.17 
@@ -23,13 +49,9 @@ jobs:

    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
      with:
-        go-version: '^1.17.7'
-
-    # Install libganglia
-    - name: Setup Ganglia
-      run: sudo apt install ganglia-monitor libganglia1
+        go-version: '1.17.7'

    - name: Build MetricCollector
      run: make
@@ -53,13 +75,9 @@ jobs:

    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
      with:
-        go-version: '^1.16.7' # The version AlmaLinux 8.5 uses
-
-    # Install libganglia
-    - name: Setup Ganglia
-      run: sudo apt install ganglia-monitor libganglia1
+        go-version: '1.16.7' # The version AlmaLinux 8.5 uses

    - name: Build MetricCollector
      run: make
--- a/28
+++ b/28
@@ -16,15 +16,23 @@ COMPONENT_DIRS   := collectors \
 			internal/multiChanTicker

 BINDIR = bin
+GOBIN = $(shell which go)


 .PHONY: all
 all: $(APP)

 $(APP): $(GOSRC)
+	if [ "$(shell $(GOBIN) version | cut -d' ' -f 3 | cut -d '.' -f1-2)" = "go1.16" ]; then \
+		echo "1.16"; \
+		cp go.mod.1.16 go.mod; \
+	else \
+		echo "1.17+"; \
+		cp go.mod.1.17+ go.mod; \
+	fi
 	make -C collectors
-	go get
-	go build -o $(APP) $(GOSRC_APP)
+	$(GOBIN) get
+	$(GOBIN) build -o $(APP) $(GOSRC_APP)

 install: $(APP)
 	@WORKSPACE=$(PREFIX)
@@ -51,25 +59,25 @@ clean:

 .PHONY: fmt
 fmt:
-	go fmt $(GOSRC_COLLECTORS)
-	go fmt $(GOSRC_SINKS)
-	go fmt $(GOSRC_RECEIVERS)
-	go fmt $(GOSRC_APP)
-	@for F in $(GOSRC_INTERNAL); do go fmt $$F; done
+	$(GOBIN) fmt $(GOSRC_COLLECTORS)
+	$(GOBIN) fmt $(GOSRC_SINKS)
+	$(GOBIN) fmt $(GOSRC_RECEIVERS)
+	$(GOBIN) fmt $(GOSRC_APP)
+	@for F in $(GOSRC_INTERNAL); do $(GOBIN) fmt $$F; done


 # Examine Go source code and reports suspicious constructs
 .PHONY: vet
 vet:
-	go vet ./...
+	$(GOBIN) vet ./...


 # Run linter for the Go programming language.
 # Using static analysis, it finds bugs and performance issues, offers simplifications, and enforces style rules
 .PHONY: staticcheck
 staticcheck:
-	go install honnef.co/go/tools/cmd/staticcheck@latest
-	$$(go env GOPATH)/bin/staticcheck ./...
+	$(GOBIN) install honnef.co/go/tools/cmd/staticcheck@latest
+	$$($(GOBIN) env GOPATH)/bin/staticcheck ./...

 .ONESHELL:
 .PHONY: RPM
--- a/cc-metric-collector.go
+++ b/cc-metric-collector.go
@@ -22,8 +22,8 @@ import (
 )

 type CentralConfigFile struct {
-	Interval            int    `json:"interval"`
-	Duration            int    `json:"duration"`
+	Interval            string `json:"interval"`
+	Duration            string `json:"duration"`
 	CollectorConfigFile string `json:"collectors"`
 	RouterConfigFile    string `json:"router"`
 	SinkConfigFile      string `json:"sinks"`
@@ -173,16 +173,36 @@ func mainFunc() int {
 		cclog.Error("Error reading configuration file ", rcfg.CliArgs["configfile"], ": ", err.Error())
 		return 1
 	}
-	if rcfg.ConfigFile.Interval <= 0 || time.Duration(rcfg.ConfigFile.Interval)*time.Second <= 0 {
-		cclog.Error("Configuration value 'interval' must be greater than zero")
+
+	// Properly use duration parser with inputs like '60s', '5m' or similar
+	if len(rcfg.ConfigFile.Interval) > 0 {
+		t, err := time.ParseDuration(rcfg.ConfigFile.Interval)
+		if err != nil {
+			cclog.Error("Configuration value 'interval' no valid duration")
+		}
+		rcfg.Interval = t
+		if rcfg.Interval == 0 {
+			cclog.Error("Configuration value 'interval' must be greater than zero")
+			return 1
+		}
+	}
+
+	// Properly use duration parser with inputs like '60s', '5m' or similar
+	if len(rcfg.ConfigFile.Duration) > 0 {
+		t, err := time.ParseDuration(rcfg.ConfigFile.Duration)
+		if err != nil {
+			cclog.Error("Configuration value 'duration' no valid duration")
+		}
+		rcfg.Duration = t
+		if rcfg.Duration == 0 {
+			cclog.Error("Configuration value 'duration' must be greater than zero")
+			return 1
+		}
+	}
+	if rcfg.Duration > rcfg.Interval {
+		cclog.Error("The interval should be greater than duration")
 		return 1
 	}
-	rcfg.Interval = time.Duration(rcfg.ConfigFile.Interval) * time.Second
-	if rcfg.ConfigFile.Duration <= 0 || time.Duration(rcfg.ConfigFile.Duration)*time.Second <= 0 {
-		cclog.Error("Configuration value 'duration' must be greater than zero")
-		return 1
-	}
-	rcfg.Duration = time.Duration(rcfg.ConfigFile.Duration) * time.Second

 	if len(rcfg.ConfigFile.RouterConfigFile) == 0 {
 		cclog.Error("Metric router configuration file must be set")
@@ -271,7 +291,7 @@ func mainFunc() int {

 	// Wait until one tick has passed. This is a workaround
 	if rcfg.CliArgs["once"] == "true" {
-		x := 1.2 * float64(rcfg.ConfigFile.Interval)
+		x := 1.2 * float64(rcfg.Interval.Seconds())
 		time.Sleep(time.Duration(int(x)) * time.Second)
 		shutdownSignal <- os.Interrupt
 	}
--- a/collectors/Makefile
+++ b/collectors/Makefile
@@ -1,22 +1,28 @@
-
-all: likwid
-
-
 # LIKWID version
 LIKWID_VERSION = 5.2.1
+LIKWID_INSTALLED_FOLDER=$(shell dirname $(shell which likwid-topology 2>/dev/null) 2>/dev/null)
+
+LIKWID_FOLDER="$(shell pwd)/likwid"
+
+all: $(LIKWID_FOLDER)/likwid.h

 .ONESHELL:
-.PHONY: likwid
-likwid:
-	INSTALL_FOLDER="$${PWD}/likwid"
-	BUILD_FOLDER="$${PWD}/likwidbuild"
-	if [ -d $${INSTALL_FOLDER} ]; then rm -r $${INSTALL_FOLDER}; fi
-	mkdir --parents --verbose  $${INSTALL_FOLDER} $${BUILD_FOLDER}
-	wget -P "$${BUILD_FOLDER}" ftp://ftp.rrze.uni-erlangen.de/mirrors/likwid/likwid-$(LIKWID_VERSION).tar.gz
-	tar -C $${BUILD_FOLDER} -xf $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION).tar.gz
-	install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/likwid*.h $${INSTALL_FOLDER}/
-	install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/bstrlib.h $${INSTALL_FOLDER}/
-	rm -r $${BUILD_FOLDER}
+.PHONY: $(LIKWID_FOLDER)/likwid.h
+$(LIKWID_FOLDER)/likwid.h:
+	if [ "$(LIKWID_INSTALLED_FOLDER)" != "" ]; then \
+		BASE="$(LIKWID_INSTALLED_FOLDER)/../include"; \
+		mkdir -p $(LIKWID_FOLDER); \
+		cp $$BASE/*.h $(LIKWID_FOLDER); \
+	else \
+		BUILD_FOLDER="$${PWD}/likwidbuild"; \
+		if [ -d $(LIKWID_FOLDER) ]; then rm -r $(LIKWID_FOLDER); fi; \
+		mkdir --parents --verbose  $(LIKWID_FOLDER) $${BUILD_FOLDER}; \
+		wget -P "$${BUILD_FOLDER}" http://ftp.rrze.uni-erlangen.de/mirrors/likwid/likwid-$(LIKWID_VERSION).tar.gz; \
+		tar -C $${BUILD_FOLDER} -xf $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION).tar.gz; \
+		install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/likwid*.h $(LIKWID_FOLDER)/; \
+		install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/bstrlib.h $(LIKWID_FOLDER)/; \
+		rm -r $${BUILD_FOLDER}; \
+	fi


 clean:
--- a/collectors/README.md
+++ b/collectors/README.md
@@ -39,6 +39,7 @@ In contrast to the configuration files for sinks and receivers, the collectors c
 * [`gpfs`](./gpfsMetric.md)
 * [`beegfs_meta`](./beegfsmetaMetric.md)
 * [`beegfs_storage`](./beegfsstorageMetric.md)
+* [`rocm_smi`](./rocmsmiMetric.md)

 ## Todos

--- a/collectors/beegfsmetaMetric.go
+++ b/collectors/beegfsmetaMetric.go
@@ -55,6 +55,7 @@ func (m *BeegfsMetaCollector) Init(config json.RawMessage) error {

 	m.name = "BeegfsMetaCollector"
 	m.setup()
+	m.parallel = true
 	// Set default beegfs-ctl binary

 	m.config.Beegfs = DEFAULT_BEEGFS_CMD
--- a/collectors/beegfsstorageMetric.go
+++ b/collectors/beegfsstorageMetric.go
@@ -48,6 +48,7 @@ func (m *BeegfsStorageCollector) Init(config json.RawMessage) error {

 	m.name = "BeegfsStorageCollector"
 	m.setup()
+	m.parallel = true
 	// Set default beegfs-ctl binary

 	m.config.Beegfs = DEFAULT_BEEGFS_CMD
--- a/collectors/collectorManager.go
+++ b/collectors/collectorManager.go
@@ -14,39 +14,43 @@ import (
 // Map of all available metric collectors
 var AvailableCollectors = map[string]MetricCollector{

-	"likwid":           new(LikwidCollector),
-	"loadavg":          new(LoadavgCollector),
-	"memstat":          new(MemstatCollector),
-	"netstat":          new(NetstatCollector),
-	"ibstat":           new(InfinibandCollector),
-	"lustrestat":       new(LustreCollector),
-	"cpustat":          new(CpustatCollector),
-	"topprocs":         new(TopProcsCollector),
-	"nvidia":           new(NvidiaCollector),
-	"customcmd":        new(CustomCmdCollector),
-	"iostat":           new(IOstatCollector),
-	"diskstat":         new(DiskstatCollector),
-	"tempstat":         new(TempCollector),
-	"ipmistat":         new(IpmiCollector),
-	"gpfs":             new(GpfsCollector),
-	"cpufreq":          new(CPUFreqCollector),
-	"cpufreq_cpuinfo":  new(CPUFreqCpuInfoCollector),
-	"nfs3stat":         new(Nfs3Collector),
-	"nfs4stat":         new(Nfs4Collector),
-	"numastats":        new(NUMAStatsCollector),
-	"beegfs_meta":      new(BeegfsMetaCollector),
-	"beegfs_storage":   new(BeegfsStorageCollector),
+	"likwid":          new(LikwidCollector),
+	"loadavg":         new(LoadavgCollector),
+	"memstat":         new(MemstatCollector),
+	"netstat":         new(NetstatCollector),
+	"ibstat":          new(InfinibandCollector),
+	"lustrestat":      new(LustreCollector),
+	"cpustat":         new(CpustatCollector),
+	"topprocs":        new(TopProcsCollector),
+	"nvidia":          new(NvidiaCollector),
+	"customcmd":       new(CustomCmdCollector),
+	"iostat":          new(IOstatCollector),
+	"diskstat":        new(DiskstatCollector),
+	"tempstat":        new(TempCollector),
+	"ipmistat":        new(IpmiCollector),
+	"gpfs":            new(GpfsCollector),
+	"cpufreq":         new(CPUFreqCollector),
+	"cpufreq_cpuinfo": new(CPUFreqCpuInfoCollector),
+	"nfs3stat":        new(Nfs3Collector),
+	"nfs4stat":        new(Nfs4Collector),
+	"numastats":       new(NUMAStatsCollector),
+	"beegfs_meta":     new(BeegfsMetaCollector),
+	"beegfs_storage":  new(BeegfsStorageCollector),
+	"rocm_smi":        new(RocmSmiCollector),
 }

 // Metric collector manager data structure
 type collectorManager struct {
-	collectors []MetricCollector          // List of metric collectors to use
-	output     chan lp.CCMetric           // Output channels
-	done       chan bool                  // channel to finish / stop metric collector manager
-	ticker     mct.MultiChanTicker        // periodically ticking once each interval
-	duration   time.Duration              // duration (for metrics that measure over a given duration)
-	wg         *sync.WaitGroup            // wait group for all goroutines in cc-metric-collector
-	config     map[string]json.RawMessage // json encoded config for collector manager
+	collectors   []MetricCollector          // List of metric collectors to read in parallel
+	serial       []MetricCollector          // List of metric collectors to read serially
+	output       chan lp.CCMetric           // Output channels
+	done         chan bool                  // channel to finish / stop metric collector manager
+	ticker       mct.MultiChanTicker        // periodically ticking once each interval
+	duration     time.Duration              // duration (for metrics that measure over a given duration)
+	wg           *sync.WaitGroup            // wait group for all goroutines in cc-metric-collector
+	config       map[string]json.RawMessage // json encoded config for collector manager
+	collector_wg sync.WaitGroup             // internally used wait group for the parallel reading of collector
+	parallel_run bool                       // Flag whether the collectors are currently read in parallel
 }

 // Metric collector manager access functions
@@ -66,6 +70,7 @@ type CollectorManager interface {
 // Initialization is done for all configured collectors
 func (cm *collectorManager) Init(ticker mct.MultiChanTicker, duration time.Duration, wg *sync.WaitGroup, collectConfigFile string) error {
 	cm.collectors = make([]MetricCollector, 0)
+	cm.serial = make([]MetricCollector, 0)
 	cm.output = nil
 	cm.done = make(chan bool)
 	cm.wg = wg
@@ -100,7 +105,11 @@ func (cm *collectorManager) Init(ticker mct.MultiChanTicker, duration time.Durat
 			continue
 		}
 		cclog.ComponentDebug("CollectorManager", "ADD COLLECTOR", collector.Name())
-		cm.collectors = append(cm.collectors, collector)
+		if collector.Parallel() {
+			cm.collectors = append(cm.collectors, collector)
+		} else {
+			cm.serial = append(cm.serial, collector)
+		}
 	}
 	return nil
 }
@@ -116,6 +125,10 @@ func (cm *collectorManager) Start() {
 		// Collector manager is done
 		done := func() {
 			// close all metric collectors
+			if cm.parallel_run {
+				cm.collector_wg.Wait()
+				cm.parallel_run = false
+			}
 			for _, c := range cm.collectors {
 				c.Close()
 			}
@@ -130,7 +143,26 @@ func (cm *collectorManager) Start() {
 				done()
 				return
 			case t := <-tick:
+				cm.parallel_run = true
 				for _, c := range cm.collectors {
+					// Wait for done signal or execute the collector
+					select {
+					case <-cm.done:
+						done()
+						return
+					default:
+						// Read metrics from collector c via goroutine
+						cclog.ComponentDebug("CollectorManager", c.Name(), t)
+						cm.collector_wg.Add(1)
+						go func(myc MetricCollector) {
+							myc.Read(cm.duration, cm.output)
+							cm.collector_wg.Done()
+						}(c)
+					}
+				}
+				cm.collector_wg.Wait()
+				cm.parallel_run = false
+				for _, c := range cm.serial {
 					// Wait for done signal or execute the collector
 					select {
 					case <-cm.done:
--- a/collectors/cpufreqCpuinfoMetric.go
+++ b/collectors/cpufreqCpuinfoMetric.go
@@ -48,6 +48,7 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
 	m.setup()

 	m.name = "CPUFreqCpuInfoCollector"
+	m.parallel = true
 	m.meta = map[string]string{
 		"source": m.name,
 		"group":  "CPU",
@@ -150,7 +151,7 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
 		t.numNonHT = numNonHT
 		t.numNonHT_int = numNonHT_int
 		t.tagSet = map[string]string{
-			"type":       "cpu",
+			"type":       "hwthread",
 			"type-id":    t.processor,
 			"package_id": t.physicalPackageID,
 		}
--- a/collectors/cpufreqCpuinfoMetric.md
+++ b/collectors/cpufreqCpuinfoMetric.md
@@ -4,7 +4,7 @@
  "cpufreq_cpuinfo": {}
 ```

-The `cpufreq_cpuinfo` collector reads the clock frequency from `/proc/cpuinfo` and outputs a handful **cpu** metrics.
+The `cpufreq_cpuinfo` collector reads the clock frequency from `/proc/cpuinfo` and outputs a handful **hwthread** metrics.

 Metrics:
 * `cpufreq`
--- a/collectors/cpufreqMetric.go
+++ b/collectors/cpufreqMetric.go
@@ -53,6 +53,7 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {

 	m.name = "CPUFreqCollector"
 	m.setup()
+	m.parallel = true
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
@@ -161,7 +162,7 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 		t.numNonHT = numNonHT
 		t.numNonHT_int = numNonHT_int
 		t.tagSet = map[string]string{
-			"type":       "cpu",
+			"type":       "hwthread",
 			"type-id":    t.processor,
 			"package_id": t.physicalPackageID,
 		}
--- a/collectors/cpufreqMetric.md
+++ b/collectors/cpufreqMetric.md
@@ -5,7 +5,7 @@
  }
 ```

-The `cpufreq` collector reads the clock frequency from `/sys/devices/system/cpu/cpu*/cpufreq` and outputs a handful **cpu** metrics.
+The `cpufreq` collector reads the clock frequency from `/sys/devices/system/cpu/cpu*/cpufreq` and outputs a handful **hwthread** metrics.

 Metrics:
 * `cpufreq`
--- a/collectors/cpustatMetric.go
+++ b/collectors/cpustatMetric.go
@@ -30,6 +30,7 @@ type CpustatCollector struct {
 func (m *CpustatCollector) Init(config json.RawMessage) error {
 	m.name = "CpustatCollector"
 	m.setup()
+	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "CPU", "unit": "Percent"}
 	m.nodetags = map[string]string{"type": "node"}
 	if len(config) > 0 {
@@ -82,7 +83,7 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {
 		if strings.HasPrefix(linefields[0], "cpu") && strings.Compare(linefields[0], "cpu") != 0 {
 			cpustr := strings.TrimLeft(linefields[0], "cpu")
 			cpu, _ := strconv.Atoi(cpustr)
-			m.cputags[linefields[0]] = map[string]string{"type": "cpu", "type-id": fmt.Sprintf("%d", cpu)}
+			m.cputags[linefields[0]] = map[string]string{"type": "hwthread", "type-id": fmt.Sprintf("%d", cpu)}
 			num_cpus++
 		}
 	}
--- a/collectors/customCmdMetric.go
+++ b/collectors/customCmdMetric.go
@@ -33,6 +33,7 @@ type CustomCmdCollector struct {
 func (m *CustomCmdCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "CustomCmdCollector"
+	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "Custom"}
 	if len(config) > 0 {
 		err = json.Unmarshal(config, &m.config)
--- a/collectors/diskstatMetric.go
+++ b/collectors/diskstatMetric.go
@@ -3,7 +3,6 @@ package collectors
 import (
 	"bufio"
 	"encoding/json"
-	"fmt"
 	"os"
 	"strings"
 	"syscall"
@@ -30,6 +29,7 @@ type DiskstatCollector struct {

 func (m *DiskstatCollector) Init(config json.RawMessage) error {
 	m.name = "DiskstatCollector"
+	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "Disk"}
 	m.setup()
 	if len(config) > 0 {
@@ -78,11 +78,17 @@ func (m *DiskstatCollector) Read(interval time.Duration, output chan lp.CCMetric
 			continue
 		}
 		path := strings.Replace(linefields[1], `\040`, " ", -1)
-		stat := syscall.Statfs_t{}
+		stat := syscall.Statfs_t{
+			Blocks: 0,
+			Bsize:  0,
+			Bfree:  0,
+		}
 		err := syscall.Statfs(path, &stat)
 		if err != nil {
-			fmt.Println(err.Error())
-			return
+			continue
+		}
+		if stat.Blocks == 0 || stat.Bsize == 0 {
+			continue
 		}
 		tags := map[string]string{"type": "node", "device": linefields[0]}
 		total := (stat.Blocks * uint64(stat.Bsize)) / uint64(1000000000)
@@ -97,9 +103,11 @@ func (m *DiskstatCollector) Read(interval time.Duration, output chan lp.CCMetric
 			y.AddMeta("unit", "GBytes")
 			output <- y
 		}
-		perc := (100 * (total - free)) / total
-		if perc > part_max_used {
-			part_max_used = perc
+		if total > 0 {
+			perc := (100 * (total - free)) / total
+			if perc > part_max_used {
+				part_max_used = perc
+			}
 		}
 	}
 	y, err := lp.New("part_max_used", map[string]string{"type": "node"}, m.meta, map[string]interface{}{"value": int(part_max_used)}, time.Now())
--- a/collectors/gpfsMetric.go
+++ b/collectors/gpfsMetric.go
@@ -46,6 +46,7 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "GpfsCollector"
 	m.setup()
+	m.parallel = true

 	// Set default mmpmon binary
 	m.config.Mmpmon = DEFAULT_GPFS_CMD
@@ -70,6 +71,7 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
 	for _, fs := range m.config.ExcludeFilesystem {
 		m.skipFS[fs] = struct{}{}
 	}
+	m.lastState = make(map[string]GpfsCollectorLastState)

 	// GPFS / IBM Spectrum Scale file system statistics can only be queried by user root
 	user, err := user.Current()
@@ -162,11 +164,16 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 			continue
 		}

+		// Add filesystem tag
 		m.tags["filesystem"] = filesystem
-		if _, ok := m.lastState[filesystem]; !ok {
-			m.lastState[filesystem] = GpfsCollectorLastState{
-				bytesRead:    -1,
-				bytesWritten: -1,
+
+		// Create initial last state
+		if m.config.SendBandwidths {
+			if _, ok := m.lastState[filesystem]; !ok {
+				m.lastState[filesystem] = GpfsCollectorLastState{
+					bytesRead:    -1,
+					bytesWritten: -1,
+				}
 			}
 		}

--- a/collectors/infinibandMetric.go
+++ b/collectors/infinibandMetric.go
@@ -18,13 +18,18 @@ import (

 const IB_BASEPATH = "/sys/class/infiniband/"

+type InfinibandCollectorMetric struct {
+	path string
+	unit string
+}
+
 type InfinibandCollectorInfo struct {
-	LID              string            // IB local Identifier (LID)
-	device           string            // IB device
-	port             string            // IB device port
-	portCounterFiles map[string]string // mapping counter name -> sysfs file
-	tagSet           map[string]string // corresponding tag list
-	lastState        map[string]int64  // State from last measurement
+	LID              string                               // IB local Identifier (LID)
+	device           string                               // IB device
+	port             string                               // IB device port
+	portCounterFiles map[string]InfinibandCollectorMetric // mapping counter name -> InfinibandCollectorMetric
+	tagSet           map[string]string                    // corresponding tag list
+	lastState        map[string]int64                     // State from last measurement
 }

 type InfinibandCollector struct {
@@ -49,6 +54,7 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "InfinibandCollector"
 	m.setup()
+	m.parallel = true
 	m.meta = map[string]string{
 		"source": m.name,
 		"group":  "Network",
@@ -106,16 +112,16 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {

 		// Check access to counter files
 		countersDir := filepath.Join(path, "counters")
-		portCounterFiles := map[string]string{
-			"ib_recv":      filepath.Join(countersDir, "port_rcv_data"),
-			"ib_xmit":      filepath.Join(countersDir, "port_xmit_data"),
-			"ib_recv_pkts": filepath.Join(countersDir, "port_rcv_packets"),
-			"ib_xmit_pkts": filepath.Join(countersDir, "port_xmit_packets"),
+		portCounterFiles := map[string]InfinibandCollectorMetric{
+			"ib_recv":      {path: filepath.Join(countersDir, "port_rcv_data"), unit: "bytes"},
+			"ib_xmit":      {path: filepath.Join(countersDir, "port_xmit_data"), unit: "bytes"},
+			"ib_recv_pkts": {path: filepath.Join(countersDir, "port_rcv_packets"), unit: "packets"},
+			"ib_xmit_pkts": {path: filepath.Join(countersDir, "port_xmit_packets"), unit: "packets"},
 		}
-		for _, counterFile := range portCounterFiles {
-			err := unix.Access(counterFile, unix.R_OK)
+		for _, counter := range portCounterFiles {
+			err := unix.Access(counter.path, unix.R_OK)
 			if err != nil {
-				return fmt.Errorf("unable to access %s: %v", counterFile, err)
+				return fmt.Errorf("unable to access %s: %v", counter.path, err)
 			}
 		}

@@ -165,14 +171,14 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr
 	m.lastTimestamp = now

 	for _, info := range m.info {
-		for counterName, counterFile := range info.portCounterFiles {
+		for counterName, counterDef := range info.portCounterFiles {

 			// Read counter file
-			line, err := ioutil.ReadFile(counterFile)
+			line, err := ioutil.ReadFile(counterDef.path)
 			if err != nil {
 				cclog.ComponentError(
 					m.name,
-					fmt.Sprintf("Read(): Failed to read from file '%s': %v", counterFile, err))
+					fmt.Sprintf("Read(): Failed to read from file '%s': %v", counterDef.path, err))
 				continue
 			}
 			data := strings.TrimSpace(string(line))
@@ -189,6 +195,7 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr
 			// Send absolut values
 			if m.config.SendAbsoluteValues {
 				if y, err := lp.New(counterName, info.tagSet, m.meta, map[string]interface{}{"value": v}, now); err == nil {
+					y.AddMeta("unit", counterDef.unit)
 					output <- y
 				}
 			}
@@ -198,6 +205,7 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr
 				if info.lastState[counterName] >= 0 {
 					rate := float64((v - info.lastState[counterName])) / timeDiff
 					if y, err := lp.New(counterName+"_bw", info.tagSet, m.meta, map[string]interface{}{"value": rate}, now); err == nil {
+						y.AddMeta("unit", counterDef.unit+"/sec")
 						output <- y
 					}
 				}
--- a/collectors/iostatMetric.go
+++ b/collectors/iostatMetric.go
@@ -37,6 +37,7 @@ type IOstatCollector struct {
 func (m *IOstatCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "IOstatCollector"
+	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "Disk"}
 	m.setup()
 	if len(config) > 0 {
--- a/collectors/ipmiMetric.go
+++ b/collectors/ipmiMetric.go
@@ -34,6 +34,7 @@ type IpmiCollector struct {
 func (m *IpmiCollector) Init(config json.RawMessage) error {
 	m.name = "IpmiCollector"
 	m.setup()
+	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "IPMI"}
 	m.config.IpmitoolPath = string(IPMITOOL_PATH)
 	m.config.IpmisensorsPath = string(IPMISENSORS_PATH)
--- a/collectors/likwidMetric.go
+++ b/collectors/likwidMetric.go
@@ -16,6 +16,7 @@ import (
 	"math"
 	"os"
 	"os/signal"
+	"sort"
 	"strconv"
 	"strings"
 	"sync"
@@ -54,6 +55,7 @@ type LikwidEventsetConfig struct {
 	gid      C.int
 	eorder   []*C.char
 	estr     *C.char
+	go_estr  string
 	results  map[int]map[string]interface{}
 	metrics  map[int]map[string]float64
 }
@@ -101,8 +103,14 @@ func eventsToEventStr(events map[string]string) string {

 func genLikwidEventSet(input LikwidCollectorEventsetConfig) LikwidEventsetConfig {
 	tmplist := make([]string, 0)
+	clist := make([]string, 0)
+	for k := range input.Events {
+		clist = append(clist, k)
+	}
+	sort.Strings(clist)
 	elist := make([]*C.char, 0)
-	for k, v := range input.Events {
+	for _, k := range clist {
+		v := input.Events[k]
 		tmplist = append(tmplist, fmt.Sprintf("%s:%s", v, k))
 		c_counter := C.CString(k)
 		elist = append(elist, c_counter)
@@ -124,6 +132,7 @@ func genLikwidEventSet(input LikwidCollectorEventsetConfig) LikwidEventsetConfig
 		gid:     -1,
 		eorder:  elist,
 		estr:    C.CString(estr),
+		go_estr: estr,
 		results: res,
 		metrics: met,
 	}
@@ -168,6 +177,7 @@ func getBaseFreq() float64 {

 func (m *LikwidCollector) Init(config json.RawMessage) error {
 	m.name = "LikwidCollector"
+	m.parallel = false
 	m.initialized = false
 	m.running = false
 	m.config.AccessMode = LIKWID_DEF_ACCESSMODE
@@ -193,9 +203,9 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 	}
 	m.setup()

-	m.meta = map[string]string{"source": m.name, "group": "PerfCounter"}
+	m.meta = map[string]string{"group": "PerfCounter"}
 	cclog.ComponentDebug(m.name, "Get cpulist and init maps and lists")
-	cpulist := topo.CpuList()
+	cpulist := topo.HwthreadList()
 	m.cpulist = make([]C.int, len(cpulist))
 	m.cpu2tid = make(map[int]int)
 	for i, c := range cpulist {
@@ -320,7 +330,11 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 		gctr := C.GoString(counter)
 		for _, tid := range m.cpu2tid {
 			res := C.perfmon_getLastResult(evset.gid, C.int(eidx), C.int(tid))
-			evset.results[tid][gctr] = float64(res)
+			fres := float64(res)
+			if m.config.InvalidToZero && (math.IsNaN(fres) || math.IsInf(fres, 0)) {
+				fres = 0.0
+			}
+			evset.results[tid][gctr] = fres
 			evset.results[tid]["time"] = interval.Seconds()
 			evset.results[tid]["inverseClock"] = invClock
 		}
@@ -339,15 +353,12 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 				value, err := agg.EvalFloat64Condition(metric.Calc, evset.results[tid])
 				if err != nil {
 					cclog.ComponentError(m.name, "Calculation for metric", metric.Name, "failed:", err.Error())
-					continue
+					value = 0.0
+				}
+				if m.config.InvalidToZero && (math.IsNaN(value) || math.IsInf(value, 0)) {
+					value = 0.0
 				}
 				evset.metrics[tid][metric.Name] = value
-				if m.config.InvalidToZero && math.IsNaN(value) {
-					value = 0.0
-				}
-				if m.config.InvalidToZero && math.IsInf(value, 0) {
-					value = 0.0
-				}
 				// Now we have the result, send it with the proper tags
 				if !math.IsNaN(value) {
 					if metric.Publish {
@@ -391,15 +402,12 @@ func (m *LikwidCollector) calcGlobalMetrics(interval time.Duration, output chan
 				value, err := agg.EvalFloat64Condition(metric.Calc, params)
 				if err != nil {
 					cclog.ComponentError(m.name, "Calculation for metric", metric.Name, "failed:", err.Error())
-					continue
+					value = 0.0
+				}
+				if m.config.InvalidToZero && (math.IsNaN(value) || math.IsInf(value, 0)) {
+					value = 0.0
 				}
 				m.gmresults[tid][metric.Name] = value
-				if m.config.InvalidToZero && math.IsNaN(value) {
-					value = 0.0
-				}
-				if m.config.InvalidToZero && math.IsInf(value, 0) {
-					value = 0.0
-				}
 				// Now we have the result, send it with the proper tags
 				if !math.IsNaN(value) {
 					if metric.Publish {
@@ -425,6 +433,9 @@ func (m *LikwidCollector) calcGlobalMetrics(interval time.Duration, output chan

 func (m *LikwidCollector) LateInit() error {
 	var ret C.int
+	if m.initialized {
+		return nil
+	}
 	switch m.config.AccessMode {
 	case "direct":
 		C.HPMmode(0)
@@ -475,7 +486,17 @@ func (m *LikwidCollector) LateInit() error {
 	for i, evset := range m.config.Eventsets {
 		var gid C.int
 		if len(evset.Events) > 0 {
+			skip := false
 			likwidGroup := genLikwidEventSet(evset)
+			for _, g := range m.likwidGroups {
+				if likwidGroup.go_estr == g.go_estr {
+					skip = true
+					break
+				}
+			}
+			if skip {
+				continue
+			}
 			// Now we add the list of events to likwid
 			gid = C.perfmon_addEventSet(likwidGroup.estr)
 			if gid >= 0 {
@@ -520,9 +541,14 @@ func (m *LikwidCollector) Read(interval time.Duration, output chan lp.CCMetric)
 	}

 	if !m.initialized {
-		if m.LateInit() != nil {
+		m.lock.Lock()
+		err = m.LateInit()
+		if err != nil {
+			m.lock.Unlock()
 			return
 		}
+		m.initialized = true
+		m.lock.Unlock()
 	}

 	if m.initialized && !skip {
--- a/collectors/likwidMetric.md
+++ b/collectors/likwidMetric.md
@@ -3,32 +3,63 @@

 The `likwid` collector is probably the most complicated collector. The LIKWID library is included as static library with *direct* access mode. The *direct* access mode is suitable if the daemon is executed by a root user. The static library does not contain the performance groups, so all information needs to be provided in the configuration.

-The `likwid` configuration consists of two parts, the "eventsets" and "globalmetrics":
- An event set list itself has two parts, the "events" and a set of derivable "metrics". Each of the "events" is a counter:event pair in LIKWID's syntax. The "metrics" are a list of formulas to derive the metric value from the measurements of the "events". Each metric has a name, the formula, a scope and a publish flag. Counter names can be used like variables in the formulas, so `PMC0+PMC1` sums the measurements for the both events configured in the counters `PMC0` and `PMC1`. The scope tells the Collector whether it is a metric for each hardware thread (`cpu`) or each CPU socket (`socket`). You may specify a unit for the metric with `unit`. The last one is the publishing flag. It tells the collector whether a metric should be sent to the router.
- The global metrics are metrics which require data from all event set measurements to be derived. The inputs are the metrics in the event sets. Similar to the metrics in the event sets, the global metrics are defined by a name, a formula, a scope and a publish flag. See event set metrics for details. The only difference is that there is no access to the raw event measurements anymore but only to the metrics. So, the idea is to derive a metric in the "eventsets" section and reuse it in the "globalmetrics" part. If you need a metric only for deriving the global metrics, disable forwarding of the event set metrics (`publish=false`). **Be aware** that the combination might be misleading because the "behavior" of a metric changes over time and the multiple measurements might count different computing phases. Similar to the metrics in the eventset, you can specify a metric unit with the `unit` field.
+```json
+  "likwid": {
+    "force_overwrite" : false,
+    "invalid_to_zero" : false,
+    "eventsets": [
+      {
+        "events" : {
+          "COUNTER0": "EVENT0",
+          "COUNTER1": "EVENT1",
+        },
+        "metrics" : [
+          {
+            "name": "sum_01",
+            "calc": "COUNTER0 + COUNTER1",
+            "publish": false,
+            "unit": "myunit",
+            "type": "hwthread"
+          }
+        ]
+      }
+    ]
+    "globalmetrics" : [
+      {
+        "name": "global_sum",
+        "calc": "sum_01",
+        "publish": true,
+        "unit": "myunit",
+        "type": "hwthread"
+      }
+    ]
+  }
+```
+
+The `likwid` configuration consists of two parts, the `eventsets` and `globalmetrics`:
+- An event set list itself has two parts, the `events` and a set of derivable `metrics`. Each of the `events` is a `counter:event` pair in LIKWID's syntax. The `metrics` are a list of formulas to derive the metric value from the measurements of the `events`' values. Each metric has a name, the formula, a type and a publish flag. There is an optional `unit` field. Counter names can be used like variables in the formulas, so `PMC0+PMC1` sums the measurements for the both events configured in the counters `PMC0` and `PMC1`. You can optionally use `time` for the measurement time and `inverseClock` for `1.0/baseCpuFrequency`. The type tells the LikwidCollector whether it is a metric for each hardware thread (`cpu`) or each CPU socket (`socket`). You may specify a unit for the metric with `unit`. The last one is the publishing flag. It tells the LikwidCollector whether a metric should be sent to the router or is only used internally to compute a global metric.
+- The `globalmetrics` are metrics which require data from multiple event set measurements to be derived. The inputs are the metrics in the event sets. Similar to the metrics in the event sets, the global metrics are defined by a name, a formula, a scope and a publish flag. See event set metrics for details. The only difference is that there is no access to the raw event measurements anymore but only to the metrics. Also `time` and `inverseClock` cannot be used anymore. So, the idea is to derive a metric in the `eventsets` section and reuse it in the `globalmetrics` part. If you need a metric only for deriving the global metrics, disable forwarding of the event set metrics (`"publish": false`). **Be aware** that the combination might be misleading because the "behavior" of a metric changes over time and the multiple measurements might count different computing phases. Similar to the metrics in the eventset, you can specify a metric unit with the `unit` field.

 Additional options:
- `access_mode` : Method to use for hardware performance monitoring (`direct` access as root user, `accessdaemon` for the daemon mode)
- `accessdaemon_path`: Folder with the access daemon `likwid-accessD`, commonly `$LIKWID_INSTALL_LOC/sbin`
 - `force_overwrite`: Same as setting `LIKWID_FORCE=1`. In case counters are already in-use, LIKWID overwrites their configuration to do its measurements
- `invalid_to_zero`: In some cases, the calculations result in `NaN` or `Inf`. With this option, all `NaN` and `Inf` values are replaces with `0.0`.
- `access_mode`: Specify LIKWID access mode: `direct` for direct register access as root user or `accessdaemon`
- `accessdaemon_path`: Folder of the accessDaemon `likwid-accessD`
- `liblikwid_path`: Location of `liblikwid.so`
+- `invalid_to_zero`: In some cases, the calculations result in `NaN` or `Inf`. With this option, all `NaN` and `Inf` values are replaces with `0.0`. See below in [seperate section](./likwidMetric.md#invalid_to_zero-option)
+- `access_mode`: Specify LIKWID access mode: `direct` for direct register access as root user or `accessdaemon`. The access mode `perf_event` is current untested.
+- `accessdaemon_path`: Folder of the accessDaemon `likwid-accessD` (like `/usr/local/sbin`)
+- `liblikwid_path`: Location of `liblikwid.so` including file name like `/usr/local/lib/liblikwid.so`

 ### Available metric scopes

-Hardware performance counters are scattered all over the system nowadays. A counter coveres a specific part of the system. While there are hardware thread specific counter for CPU cycles, instructions and so on, some others are specific for a whole CPU socket/package. To address that, the collector provides the specification of a 'scope' for each metric.
+Hardware performance counters are scattered all over the system nowadays. A counter coveres a specific part of the system. While there are hardware thread specific counter for CPU cycles, instructions and so on, some others are specific for a whole CPU socket/package. To address that, the LikwidCollector provides the specification of a `type` for each metric.

- `cpu` : One metric per CPU hardware thread with the tags `"type" : "cpu"` and `"type-id" : "$cpu_id"`
+- `hwthread` : One metric per CPU hardware thread with the tags `"type" : "hwthread"` and `"type-id" : "$hwthread_id"`
 - `socket` : One metric per CPU socket/package with the tags `"type" : "socket"` and `"type-id" : "$socket_id"`

-**Note:** You cannot specify `socket` scope for a metric that is measured at `cpu` scope, so some kind of expert knowledge or lookup work in the [Likwid Wiki](https://github.com/RRZE-HPC/likwid/wiki) is required. Get the scope of each counter from the *Architecture* pages and as soon as one counter in a metric is socket-specific, the whole metric is socket-specific.
+**Note:** You cannot specify `socket` scope for a metric that is measured at `hwthread` scope, so some kind of expert knowledge or lookup work in the [Likwid Wiki](https://github.com/RRZE-HPC/likwid/wiki) is required. Get the scope of each counter from the *Architecture* pages and as soon as one counter in a metric is socket-specific, the whole metric is socket-specific.

 As a guideline:
- All counters `FIXCx`, `PMCy` and `TMAz` have the scope `cpu`
+- All counters `FIXCx`, `PMCy` and `TMAz` have the scope `hwthread`
 - All counters names containing `BOX` have the scope `socket`
- All `PWRx` counters have scope `socket`, except `"PWR1" : "RAPL_CORE_ENERGY"` has `cpu` scope
+- All `PWRx` counters have scope `socket`, except `"PWR1" : "RAPL_CORE_ENERGY"` has `hwthread` scope
 - All `DFCx` counters have scope `socket`

 ### Help with the configuration
@@ -50,6 +81,7 @@ $ scripts/likwid_perfgroup_to_cc_config.py ICX MEM_DP
 {
  "events": {
    "FIXC0": "INSTR_RETIRED_ANY",
+    "FIXC1": "CPU_CLK_UNHALTED_CORE",
    "..." : "..."
  },
  "metrics" : [
@@ -58,7 +90,7 @@ $ scripts/likwid_perfgroup_to_cc_config.py ICX MEM_DP
      "name": "Runtime (RDTSC) [s]",
      "publish": true,
      "unit": "seconds"
-      "scope": "cpu"
+      "scope": "hwthread"
    },
    {
      "..." : "..."
@@ -75,21 +107,28 @@ LIKWID checks the file `/var/run/likwid.lock` before performing any interfering

 Before (SLURM prolog, ...)
 ```
-$ chwon $JOBUSER /var/run/likwid.lock
+$ chown $JOBUSER /var/run/likwid.lock
 ```

 After (SLURM epilog, ...)
 ```
-$ chwon $CCUSER /var/run/likwid.lock
+$ chown $CCUSER /var/run/likwid.lock
 ```

+### `invalid_to_zero` option
+In some cases LIKWID returns `0.0` for some events that are further used in processing and maybe used as divisor in a calculation. After evaluation of a metric, the result might be `NaN` or `+-Inf`. These resulting metrics are commonly not created and forwarded to the router because the [InfluxDB line protocol](https://docs.influxdata.com/influxdb/cloud/reference/syntax/line-protocol/#float) does not support these special floating-point values. If you want to have them sent, this option forces these metric values to be `0.0` instead.
+
+One might think this does not happen often but often used metrics in the world of performance engineering like Instructions-per-Cycle (IPC) or more frequently the actual CPU clock are derived with events like `CPU_CLK_UNHALTED_CORE` (Intel) which do not increment in halted state (as the name implies). In there are different power management systems in a chip which can cause a hardware thread to go in such a state. Moreover, if no cycles are executed by the core, also many other events are not incremented as well (like `INSTR_RETIRED_ANY` for retired instructions and part of IPC).
+
+
 ### Example configuration

+#### AMD Zen3

 ```json
  "likwid": {
    "force_overwrite" : false,
-    "nan_to_zero" : false,
+    "invalid_to_zero" : false,
    "eventsets": [
      {
        "events": {
@@ -108,20 +147,20 @@ $ chwon $CCUSER /var/run/likwid.lock
          {
            "name": "ipc",
            "calc": "PMC0/PMC1",
-            "type": "cpu",
+            "type": "hwthread",
            "publish": true
          },
          {
            "name": "flops_any",
            "calc": "0.000001*PMC2/time",
            "unit": "MFlops/s",
-            "type": "cpu",
+            "type": "hwthread",
            "publish": true
          },
          {
            "name": "clock",
            "calc": "0.000001*(FIXC1/FIXC2)/inverseClock",
-            "type": "cpu",
+            "type": "hwthread",
            "unit": "MHz",
            "publish": true
          },
@@ -182,7 +221,7 @@ $ chwon $CCUSER /var/run/likwid.lock

 ### How to get the eventsets and metrics from LIKWID

-The `likwid` collector reads hardware performance counters at a **cpu** and **socket** level. The configuration looks quite complicated but it is basically copy&paste from [LIKWID's performance groups](https://github.com/RRZE-HPC/likwid/tree/master/groups). The collector made multiple iterations and tried to use the performance groups but it lacked flexibility. The current way of configuration provides most flexibility.
+The `likwid` collector reads hardware performance counters at a **hwthread** and **socket** level. The configuration looks quite complicated but it is basically copy&paste from [LIKWID's performance groups](https://github.com/RRZE-HPC/likwid/tree/master/groups). The collector made multiple iterations and tried to use the performance groups but it lacked flexibility. The current way of configuration provides most flexibility.

 The logic is as following: There are multiple eventsets, each consisting of a list of counters+events and a list of metrics. If you compare a common performance group with the example setting above, there is not much difference:
 ```
@@ -203,10 +242,10 @@ METRICS                          ->   "metrics": [
 IPC   PMC0/PMC1                  ->     {
                                 ->       "name" : "IPC",
                                 ->       "calc" : "PMC0/PMC1",
-                                 ->       "scope": "cpu",
+                                 ->       "scope": "hwthread",
                                 ->       "publish": true
                                 ->     }
                                 ->   ]
 ```

-The script `scripts/likwid_perfgroup_to_cc_config.py` might help you.
+The script `scripts/likwid_perfgroup_to_cc_config.py` might help you.
--- a/collectors/loadavgMetric.go
+++ b/collectors/loadavgMetric.go
@@ -36,6 +36,7 @@ type LoadavgCollector struct {

 func (m *LoadavgCollector) Init(config json.RawMessage) error {
 	m.name = "LoadavgCollector"
+	m.parallel = true
 	m.setup()
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
--- a/collectors/lustreMetric.go
+++ b/collectors/lustreMetric.go
@@ -288,6 +288,7 @@ var LustreDeriveMetrics = []LustreMetricDefinition{
 func (m *LustreCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "LustreCollector"
+	m.parallel = true
 	if len(config) > 0 {
 		err = json.Unmarshal(config, &m.config)
 		if err != nil {
--- a/collectors/memstatMetric.go
+++ b/collectors/memstatMetric.go
@@ -81,6 +81,7 @@ func getStats(filename string) map[string]MemstatStats {
 func (m *MemstatCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "MemstatCollector"
+	m.parallel = true
 	m.config.NodeStats = true
 	m.config.NumaStats = false
 	if len(config) > 0 {
@@ -159,6 +160,7 @@ func (m *MemstatCollector) Init(config json.RawMessage) error {

 func (m *MemstatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 	if !m.init {
+		cclog.ComponentPrint(m.name, "Here")
 		return
 	}

--- a/collectors/metricCollector.go
+++ b/collectors/metricCollector.go
@@ -3,27 +3,25 @@ package collectors
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
-	"log"
-	"strconv"
-	"strings"
 	"time"

 	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 )

 type MetricCollector interface {
-	Name() string                                         // Name of the metric collector
-	Init(config json.RawMessage) error                    // Initialize metric collector
-	Initialized() bool                                    // Is metric collector initialized?
+	Name() string                      // Name of the metric collector
+	Init(config json.RawMessage) error // Initialize metric collector
+	Initialized() bool                 // Is metric collector initialized?
+	Parallel() bool
 	Read(duration time.Duration, output chan lp.CCMetric) // Read metrics from metric collector
 	Close()                                               // Close / finish metric collector
 }

 type metricCollector struct {
-	name string            // name of the metric
-	init bool              // is metric collector initialized?
-	meta map[string]string // static meta data tags
+	name     string            // name of the metric
+	init     bool              // is metric collector initialized?
+	parallel bool              // can the metric collector be executed in parallel with others
+	meta     map[string]string // static meta data tags
 }

 // Name returns the name of the metric collector
@@ -31,6 +29,11 @@ func (c *metricCollector) Name() string {
 	return c.name
 }

+// Name returns the name of the metric collector
+func (c *metricCollector) Parallel() bool {
+	return c.parallel
+}
+
 // Setup is for future use
 func (c *metricCollector) setup() error {
 	return nil
@@ -65,58 +68,6 @@ func stringArrayContains(array []string, str string) (int, bool) {
 	return -1, false
 }

-// SocketList returns the list of physical sockets as read from /proc/cpuinfo
-func SocketList() []int {
-	buffer, err := ioutil.ReadFile("/proc/cpuinfo")
-	if err != nil {
-		log.Print(err)
-		return nil
-	}
-	ll := strings.Split(string(buffer), "\n")
-	var packs []int
-	for _, line := range ll {
-		if strings.HasPrefix(line, "physical id") {
-			lv := strings.Fields(line)
-			id, err := strconv.ParseInt(lv[3], 10, 32)
-			if err != nil {
-				log.Print(err)
-				return packs
-			}
-			_, found := intArrayContains(packs, int(id))
-			if !found {
-				packs = append(packs, int(id))
-			}
-		}
-	}
-	return packs
-}
-
-// CpuList returns the list of physical CPUs (in contrast to logical CPUs) as read from /proc/cpuinfo
-func CpuList() []int {
-	buffer, err := ioutil.ReadFile("/proc/cpuinfo")
-	if err != nil {
-		log.Print(err)
-		return nil
-	}
-	ll := strings.Split(string(buffer), "\n")
-	var cpulist []int
-	for _, line := range ll {
-		if strings.HasPrefix(line, "processor") {
-			lv := strings.Fields(line)
-			id, err := strconv.ParseInt(lv[2], 10, 32)
-			if err != nil {
-				log.Print(err)
-				return cpulist
-			}
-			_, found := intArrayContains(cpulist, int(id))
-			if !found {
-				cpulist = append(cpulist, int(id))
-			}
-		}
-	}
-	return cpulist
-}
-
 // RemoveFromStringList removes the string r from the array of strings s
 // If r is not contained in the array an error is returned
 func RemoveFromStringList(s []string, r string) ([]string, error) {
--- a/collectors/netstatMetric.go
+++ b/collectors/netstatMetric.go
@@ -39,6 +39,7 @@ type NetstatCollector struct {

 func (m *NetstatCollector) Init(config json.RawMessage) error {
 	m.name = "NetstatCollector"
+	m.parallel = true
 	m.setup()
 	m.lastTimestamp = time.Now()

--- a/collectors/nfsMetric.go
+++ b/collectors/nfsMetric.go
@@ -114,6 +114,7 @@ func (m *nfsCollector) MainInit(config json.RawMessage) error {
 	m.data = make(map[string]NfsCollectorData)
 	m.initStats()
 	m.init = true
+	m.parallel = true
 	return nil
 }

--- a/collectors/numastatsMetric.go
+++ b/collectors/numastatsMetric.go
@@ -54,6 +54,7 @@ func (m *NUMAStatsCollector) Init(config json.RawMessage) error {
 	}

 	m.name = "NUMAStatsCollector"
+	m.parallel = true
 	m.setup()
 	m.meta = map[string]string{
 		"source": m.name,
--- a/collectors/nvidiaMetric.go
+++ b/collectors/nvidiaMetric.go
--- a/collectors/nvidiaMetric.md
+++ b/collectors/nvidiaMetric.md
@@ -3,38 +3,74 @@

 ```json
  "nvidia": {
-    "exclude_devices" : [
-      "0","1"
+    "exclude_devices": [
+      "0","1", "0000000:ff:01.0"
    ],
    "exclude_metrics": [
-      "nv_fb_memory",
+      "nv_fb_mem_used",
      "nv_fan"
-    ]
+    ],
+    "process_mig_devices": false,
+    "use_pci_info_as_type_id": true,
+    "add_pci_info_tag": false,
+    "add_uuid_meta": false,
+    "add_board_number_meta": false,
+    "add_serial_meta": false,
+    "use_uuid_for_mig_device": false,
+    "use_slice_for_mig_device": false
  }
 ```

+The `nvidia` collector can be configured to leave out specific devices with the `exclude_devices` option. It takes IDs as supplied to the NVML with `nvmlDeviceGetHandleByIndex()` or the PCI address in NVML format (`%08X:%02X:%02X.0`). Metrics (listed below) that should not be sent to the MetricRouter can be excluded with the `exclude_metrics` option. Commonly only the physical GPUs are monitored. If MIG devices should be analyzed as well, set `process_mig_devices` (adds `stype=mig,stype-id=<mig_index>`). With the options `use_uuid_for_mig_device` and `use_slice_for_mig_device`, the `<mig_index>` can be replaced with the UUID (e.g. `MIG-6a9f7cc8-6d5b-5ce0-92de-750edc4d8849`) or the MIG slice name (e.g. `1g.5gb`).
+
+The metrics sent by the `nvidia` collector use `accelerator` as `type` tag. For the `type-id`, it uses the device handle index by default. With the `use_pci_info_as_type_id` option, the PCI ID is used instead. If both values should be added as tags, activate the `add_pci_info_tag` option. It uses the device handle index as `type-id` and adds the PCI ID as separate `pci_identifier` tag.
+
+Optionally, it is possible to add the UUID, the board part number and the serial to the meta informations. They are not sent to the sinks (if not configured otherwise).
+
+
 Metrics:
 * `nv_util`
 * `nv_mem_util`
-* `nv_mem_total`
-* `nv_fb_memory`
+* `nv_fb_mem_total`
+* `nv_fb_mem_used`
+* `nv_bar1_mem_total`
+* `nv_bar1_mem_used`
 * `nv_temp`
 * `nv_fan`
 * `nv_ecc_mode`
 * `nv_perf_state`
-* `nv_power_usage_report`
-* `nv_graphics_clock_report`
-* `nv_sm_clock_report`
-* `nv_mem_clock_report`
+* `nv_power_usage`
+* `nv_graphics_clock`
+* `nv_sm_clock`
+* `nv_mem_clock`
+* `nv_video_clock`
 * `nv_max_graphics_clock`
 * `nv_max_sm_clock`
 * `nv_max_mem_clock`
-* `nv_ecc_db_error`
-* `nv_ecc_sb_error`
-* `nv_power_man_limit`
+* `nv_max_video_clock`
+* `nv_ecc_uncorrected_error`
+* `nv_ecc_corrected_error`
+* `nv_power_max_limit`
 * `nv_encoder_util`
 * `nv_decoder_util`
+* `nv_remapped_rows_corrected`
+* `nv_remapped_rows_uncorrected`
+* `nv_remapped_rows_pending`
+* `nv_remapped_rows_failure`
+* `nv_compute_processes`
+* `nv_graphics_processes`
+* `nv_violation_power`
+* `nv_violation_thermal`
+* `nv_violation_sync_boost`
+* `nv_violation_board_limit`
+* `nv_violation_low_util`
+* `nv_violation_reliability`
+* `nv_violation_below_app_clock`
+* `nv_violation_below_base_clock`
+* `nv_nvlink_crc_flit_errors`
+* `nv_nvlink_crc_errors`
+* `nv_nvlink_ecc_errors`
+* `nv_nvlink_replay_errors`
+* `nv_nvlink_recovery_errors`

-It uses a separate `type` in the metrics. The output metric looks like this:
-`<name>,type=accelerator,type-id=<nvidia-gpu-id> value=<metric value> <timestamp>`
-
+Some metrics add the additional sub type tag (`stype`) like the `nv_nvlink_*` metrics set `stype=nvlink,stype-id=<link_number>`. 
--- a/collectors/rocmsmiMetric.go
+++ b/collectors/rocmsmiMetric.go
@@ -0,0 +1,319 @@
+package collectors
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	"github.com/ClusterCockpit/go-rocm-smi/pkg/rocm_smi"
+)
+
+type RocmSmiCollectorConfig struct {
+	ExcludeMetrics     []string `json:"exclude_metrics,omitempty"`
+	ExcludeDevices     []string `json:"exclude_devices,omitempty"`
+	AddPciInfoTag      bool     `json:"add_pci_info_tag,omitempty"`
+	UsePciInfoAsTypeId bool     `json:"use_pci_info_as_type_id,omitempty"`
+	AddSerialMeta      bool     `json:"add_serial_meta,omitempty"`
+}
+
+type RocmSmiCollectorDevice struct {
+	device         rocm_smi.DeviceHandle
+	index          int
+	tags           map[string]string // default tags
+	meta           map[string]string // default meta information
+	excludeMetrics map[string]bool   // copy of exclude metrics from config
+}
+
+type RocmSmiCollector struct {
+	metricCollector
+	config  RocmSmiCollectorConfig // the configuration structure
+	devices []RocmSmiCollectorDevice
+}
+
+// Functions to implement MetricCollector interface
+// Init(...), Read(...), Close()
+// See: metricCollector.go
+
+// Init initializes the sample collector
+// Called once by the collector manager
+// All tags, meta data tags and metrics that do not change over the runtime should be set here
+func (m *RocmSmiCollector) Init(config json.RawMessage) error {
+	var err error = nil
+	// Always set the name early in Init() to use it in cclog.Component* functions
+	m.name = "RocmSmiCollector"
+	// This is for later use, also call it early
+	m.setup()
+	// Define meta information sent with each metric
+	// (Can also be dynamic or this is the basic set with extension through AddMeta())
+	//m.meta = map[string]string{"source": m.name, "group": "AMD"}
+	// Define tags sent with each metric
+	// The 'type' tag is always needed, it defines the granulatity of the metric
+	// node -> whole system
+	// socket -> CPU socket (requires socket ID as 'type-id' tag)
+	// cpu -> single CPU hardware thread (requires cpu ID as 'type-id' tag)
+	//m.tags = map[string]string{"type": "node"}
+	// Read in the JSON configuration
+	if len(config) > 0 {
+		err = json.Unmarshal(config, &m.config)
+		if err != nil {
+			cclog.ComponentError(m.name, "Error reading config:", err.Error())
+			return err
+		}
+	}
+
+	ret := rocm_smi.Init()
+	if ret != rocm_smi.STATUS_SUCCESS {
+		err = errors.New("Failed to initialize ROCm SMI library")
+		cclog.ComponentError(m.name, err.Error())
+		return err
+	}
+
+	numDevs, ret := rocm_smi.NumMonitorDevices()
+	if ret != rocm_smi.STATUS_SUCCESS {
+		err = errors.New("Failed to get number of GPUs from ROCm SMI library")
+		cclog.ComponentError(m.name, err.Error())
+		return err
+	}
+
+	exclDev := func(s string) bool {
+		skip_device := false
+		for _, excl := range m.config.ExcludeDevices {
+			if excl == s {
+				skip_device = true
+				break
+			}
+		}
+		return skip_device
+	}
+
+	m.devices = make([]RocmSmiCollectorDevice, 0)
+
+	for i := 0; i < numDevs; i++ {
+		str_i := fmt.Sprintf("%d", i)
+		if exclDev(str_i) {
+			continue
+		}
+		device, ret := rocm_smi.DeviceGetHandleByIndex(i)
+		if ret != rocm_smi.STATUS_SUCCESS {
+			err = fmt.Errorf("Failed to get handle for GPU %d", i)
+			cclog.ComponentError(m.name, err.Error())
+			return err
+		}
+
+		pciInfo, ret := rocm_smi.DeviceGetPciInfo(device)
+		if ret != rocm_smi.STATUS_SUCCESS {
+			err = fmt.Errorf("Failed to get PCI information for GPU %d", i)
+			cclog.ComponentError(m.name, err.Error())
+			return err
+		}
+
+		pciId := fmt.Sprintf(
+			"%08X:%02X:%02X.%X",
+			pciInfo.Domain,
+			pciInfo.Bus,
+			pciInfo.Device,
+			pciInfo.Function)
+
+		if exclDev(pciId) {
+			continue
+		}
+
+		dev := RocmSmiCollectorDevice{
+			device: device,
+			tags: map[string]string{
+				"type":    "accelerator",
+				"type-id": str_i,
+			},
+			meta: map[string]string{
+				"source": m.name,
+				"group":  "AMD",
+			},
+		}
+		if m.config.UsePciInfoAsTypeId {
+			dev.tags["type-id"] = pciId
+		} else if m.config.AddPciInfoTag {
+			dev.tags["pci_identifier"] = pciId
+		}
+
+		if m.config.AddSerialMeta {
+			serial, ret := rocm_smi.DeviceGetSerialNumber(device)
+			if ret != rocm_smi.STATUS_SUCCESS {
+				cclog.ComponentError(m.name, "Unable to get serial number for device at index", i, ":", rocm_smi.StatusStringNoError(ret))
+			} else {
+				dev.meta["serial"] = serial
+			}
+		}
+		// Add excluded metrics
+		dev.excludeMetrics = map[string]bool{}
+		for _, e := range m.config.ExcludeMetrics {
+			dev.excludeMetrics[e] = true
+		}
+		dev.index = i
+		m.devices = append(m.devices, dev)
+	}
+
+	// Set this flag only if everything is initialized properly, all required files exist, ...
+	m.init = true
+	return err
+}
+
+// Read collects all metrics belonging to the sample collector
+// and sends them through the output channel to the collector manager
+func (m *RocmSmiCollector) Read(interval time.Duration, output chan lp.CCMetric) {
+	// Create a sample metric
+	timestamp := time.Now()
+
+	for _, dev := range m.devices {
+		metrics, ret := rocm_smi.DeviceGetMetrics(dev.device)
+		if ret != rocm_smi.STATUS_SUCCESS {
+			cclog.ComponentError(m.name, "Unable to get metrics for device at index", dev.index, ":", rocm_smi.StatusStringNoError(ret))
+			continue
+		}
+
+		if !dev.excludeMetrics["rocm_gfx_util"] {
+			value := metrics.Average_gfx_activity
+			y, err := lp.New("rocm_gfx_util", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_umc_util"] {
+			value := metrics.Average_umc_activity
+			y, err := lp.New("rocm_umc_util", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_mm_util"] {
+			value := metrics.Average_mm_activity
+			y, err := lp.New("rocm_mm_util", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_avg_power"] {
+			value := metrics.Average_socket_power
+			y, err := lp.New("rocm_avg_power", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_temp_mem"] {
+			value := metrics.Temperature_mem
+			y, err := lp.New("rocm_temp_mem", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_temp_hotspot"] {
+			value := metrics.Temperature_hotspot
+			y, err := lp.New("rocm_temp_hotspot", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_temp_edge"] {
+			value := metrics.Temperature_edge
+			y, err := lp.New("rocm_temp_edge", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_temp_vrgfx"] {
+			value := metrics.Temperature_vrgfx
+			y, err := lp.New("rocm_temp_vrgfx", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_temp_vrsoc"] {
+			value := metrics.Temperature_vrsoc
+			y, err := lp.New("rocm_temp_vrsoc", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_temp_vrmem"] {
+			value := metrics.Temperature_vrmem
+			y, err := lp.New("rocm_temp_vrmem", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_gfx_clock"] {
+			value := metrics.Average_gfxclk_frequency
+			y, err := lp.New("rocm_gfx_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_soc_clock"] {
+			value := metrics.Average_socclk_frequency
+			y, err := lp.New("rocm_soc_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_u_clock"] {
+			value := metrics.Average_uclk_frequency
+			y, err := lp.New("rocm_u_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_v0_clock"] {
+			value := metrics.Average_vclk0_frequency
+			y, err := lp.New("rocm_v0_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_v1_clock"] {
+			value := metrics.Average_vclk1_frequency
+			y, err := lp.New("rocm_v1_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_d0_clock"] {
+			value := metrics.Average_dclk0_frequency
+			y, err := lp.New("rocm_d0_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_d1_clock"] {
+			value := metrics.Average_dclk1_frequency
+			y, err := lp.New("rocm_d1_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+		if !dev.excludeMetrics["rocm_temp_hbm"] {
+			for i := 0; i < rocm_smi.NUM_HBM_INSTANCES; i++ {
+				value := metrics.Temperature_hbm[i]
+				y, err := lp.New("rocm_temp_hbm", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+				if err == nil {
+					y.AddTag("stype", "device")
+					y.AddTag("stype-id", fmt.Sprintf("%d", i))
+					output <- y
+				}
+			}
+		}
+	}
+
+}
+
+// Close metric collector: close network connection, close files, close libraries, ...
+// Called once by the collector manager
+func (m *RocmSmiCollector) Close() {
+	// Unset flag
+	ret := rocm_smi.Shutdown()
+	if ret != rocm_smi.STATUS_SUCCESS {
+		cclog.ComponentError(m.name, "Failed to shutdown ROCm SMI library")
+	}
+	m.init = false
+}
--- a/collectors/rocmsmiMetric.md
+++ b/collectors/rocmsmiMetric.md
@@ -0,0 +1,47 @@
+
+## `rocm_smi` collector
+
+```json
+  "rocm_smi": {
+    "exclude_devices": [
+      "0","1", "0000000:ff:01.0"
+    ],
+    "exclude_metrics": [
+      "rocm_mm_util",
+      "rocm_temp_vrsoc"
+    ],
+    "use_pci_info_as_type_id": true,
+    "add_pci_info_tag": false,
+    "add_serial_meta": false,
+  }
+```
+
+The `rocm_smi` collector can be configured to leave out specific devices with the `exclude_devices` option. It takes logical IDs in the list of available devices or the PCI address similar to NVML format (`%08X:%02X:%02X.0`). Metrics (listed below) that should not be sent to the MetricRouter can be excluded with the `exclude_metrics` option. 
+
+The metrics sent by the `rocm_smi` collector use `accelerator` as `type` tag. For the `type-id`, it uses the device handle index by default. With the `use_pci_info_as_type_id` option, the PCI ID is used instead. If both values should be added as tags, activate the `add_pci_info_tag` option. It uses the device handle index as `type-id` and adds the PCI ID as separate `pci_identifier` tag.
+
+Optionally, it is possible to add the serial to the meta informations. They are not sent to the sinks (if not configured otherwise).
+
+
+Metrics:
+* `rocm_gfx_util`
+* `rocm_umc_util`
+* `rocm_mm_util`
+* `rocm_avg_power`
+* `rocm_temp_mem`
+* `rocm_temp_hotspot`
+* `rocm_temp_edge`
+* `rocm_temp_vrgfx`
+* `rocm_temp_vrsoc`
+* `rocm_temp_vrmem`
+* `rocm_gfx_clock`
+* `rocm_soc_clock`
+* `rocm_u_clock`
+* `rocm_v0_clock`
+* `rocm_v1_clock`
+* `rocm_d0_clock`
+* `rocm_d1_clock`
+* `rocm_temp_hbm`
+
+
+Some metrics add the additional sub type tag (`stype`) like the `rocm_temp_hbm` metrics set `stype=device,stype-id=<HBM_slice_number>`. 
--- a/collectors/sampleMetric.go
+++ b/collectors/sampleMetric.go
@@ -35,6 +35,10 @@ func (m *SampleCollector) Init(config json.RawMessage) error {
 	m.name = "InternalCollector"
 	// This is for later use, also call it early
 	m.setup()
+	// Tell whether the collector should be run in parallel with others (reading files, ...)
+	// or it should be run serially, mostly for collectors acutally doing measurements
+	// because they should not measure the execution of the other collectors
+	m.parallel = true
 	// Define meta information sent with each metric
 	// (Can also be dynamic or this is the basic set with extension through AddMeta())
 	m.meta = map[string]string{"source": m.name, "group": "SAMPLE"}
@@ -42,7 +46,12 @@ func (m *SampleCollector) Init(config json.RawMessage) error {
 	// The 'type' tag is always needed, it defines the granulatity of the metric
 	// node -> whole system
 	// socket -> CPU socket (requires socket ID as 'type-id' tag)
-	// cpu -> single CPU hardware thread (requires cpu ID as 'type-id' tag)
+	// die -> CPU die (requires CPU die ID as 'type-id' tag)
+	// memoryDomain -> NUMA domain (requires NUMA domain ID as 'type-id' tag)
+	// llc -> Last level cache (requires last level cache ID as 'type-id' tag)
+	// core -> single CPU core that may consist of multiple hardware threads (SMT) (requires core ID as 'type-id' tag)
+	// hwthtread -> single CPU hardware thread (requires hardware thread ID as 'type-id' tag)
+	// accelerator -> A accelerator device like GPU or FPGA (requires an accelerator ID as 'type-id' tag)
 	m.tags = map[string]string{"type": "node"}
 	// Read in the JSON configuration
 	if len(config) > 0 {
--- a/collectors/tempMetric.go
+++ b/collectors/tempMetric.go
@@ -50,6 +50,7 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 	}

 	m.name = "TempCollector"
+	m.parallel = true
 	m.setup()
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
@@ -116,6 +117,10 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 		}

 		// Sensor file
+		_, err = ioutil.ReadFile(file)
+		if err != nil {
+			continue
+		}
 		sensor.file = file

 		// Sensor tags
--- a/collectors/topprocsMetric.go
+++ b/collectors/topprocsMetric.go
@@ -28,6 +28,7 @@ type TopProcsCollector struct {
 func (m *TopProcsCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "TopProcsCollector"
+	m.parallel = true
 	m.tags = map[string]string{"type": "node"}
 	m.meta = map[string]string{"source": m.name, "group": "TopProcs"}
 	if len(config) > 0 {
--- a/config.json
+++ b/config.json
@@ -1,8 +1,8 @@
 {
-  "sinks": "sinks.json",
-  "collectors" : "collectors.json",
-  "receivers" : "receivers.json",
-  "router" : "router.json",
-  "interval": 10,
-  "duration": 1
+  "sinks": "./sinks.json",
+  "collectors" : "./collectors.json",
+  "receivers" : "./receivers.json",
+  "router" : "./router.json",
+  "interval": "10s",
+  "duration": "1s"
 }
--- a/go.mod
+++ b/go.mod
@@ -1,19 +1,35 @@
 module github.com/ClusterCockpit/cc-metric-collector

-go 1.16
-
-require (
-	github.com/NVIDIA/go-nvml v0.11.1-0
-	github.com/influxdata/influxdb-client-go/v2 v2.7.0
-	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
-	github.com/nats-io/nats.go v1.13.1-0.20211122170419-d7c1d78a50fc
-	golang.org/x/sys v0.0.0-20220114195835-da31bd327af9
-	gopkg.in/Knetic/govaluate.v2 v2.3.0
-)
+go 1.17

 require (
+	github.com/ClusterCockpit/cc-units v0.0.0-20220318130935-92a0c6442220
+	github.com/NVIDIA/go-nvml v0.11.6-0
 	github.com/PaesslerAG/gval v1.1.2
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/nats-io/nats-server/v2 v2.7.0 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
+	github.com/gorilla/mux v1.8.0
+	github.com/influxdata/influxdb-client-go/v2 v2.8.1
+	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
+	github.com/nats-io/nats.go v1.14.0
+	github.com/prometheus/client_golang v1.12.1
+	github.com/stmcginnis/gofish v0.13.0
+	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/deepmap/oapi-codegen v1.8.2 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/nats-io/nats-server/v2 v2.8.0 // indirect
+	github.com/nats-io/nkeys v0.3.0 // indirect
+	github.com/nats-io/nuid v1.0.1 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.32.1 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce // indirect
+	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect
+	google.golang.org/protobuf v1.26.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
--- a/go.mod.1.16
+++ b/go.mod.1.16
@@ -0,0 +1,16 @@
+module github.com/ClusterCockpit/cc-metric-collector
+
+go 1.16
+
+require (
+	github.com/NVIDIA/go-nvml v0.11.6-0
+	github.com/PaesslerAG/gval v1.1.2
+	github.com/gorilla/mux v1.8.0
+	github.com/influxdata/influxdb-client-go/v2 v2.7.0
+	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
+	github.com/nats-io/nats-server/v2 v2.8.0 // indirect
+	github.com/nats-io/nats.go v1.14.0
+	github.com/prometheus/client_golang v1.12.1
+	github.com/stmcginnis/gofish v0.13.0
+	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad
+)
--- a/go.mod.1.17+
+++ b/go.mod.1.17+
@@ -0,0 +1,16 @@
+module github.com/ClusterCockpit/cc-metric-collector
+
+go 1.17
+
+require (
+	github.com/NVIDIA/go-nvml v0.11.6-0
+	github.com/PaesslerAG/gval v1.1.2
+	github.com/gorilla/mux v1.8.0
+	github.com/influxdata/influxdb-client-go/v2 v2.8.1
+	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
+	github.com/nats-io/nats-server/v2 v2.8.0 // indirect
+	github.com/nats-io/nats.go v1.14.0
+	github.com/prometheus/client_golang v1.12.1
+	github.com/stmcginnis/gofish v0.13.0
+	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad
+)
--- a/internal/ccTopology/ccTopology.go
+++ b/internal/ccTopology/ccTopology.go
@@ -29,6 +29,7 @@ func intArrayContains(array []int, str int) (int, bool) {
 	return -1, false
 }

+// Used internally for sysfs file reads
 func fileToInt(path string) int {
 	buffer, err := ioutil.ReadFile(path)
 	if err != nil {
@@ -47,6 +48,7 @@ func fileToInt(path string) int {
 	return int(id)
 }

+// Get list of CPU socket IDs
 func SocketList() []int {
 	buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
 	if err != nil {
@@ -54,7 +56,7 @@ func SocketList() []int {
 		return nil
 	}
 	ll := strings.Split(string(buffer), "\n")
-	var packs []int
+	packs := make([]int, 0)
 	for _, line := range ll {
 		if strings.HasPrefix(line, "physical id") {
 			lv := strings.Fields(line)
@@ -72,7 +74,8 @@ func SocketList() []int {
 	return packs
 }

-func CpuList() []int {
+// Get list of hardware thread IDs in the order of listing in /proc/cpuinfo
+func HwthreadList() []int {
 	buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
 	if err != nil {
 		log.Print(err)
@@ -97,6 +100,13 @@ func CpuList() []int {
 	return cpulist
 }

+// Get list of hardware thread IDs in the order of listing in /proc/cpuinfo
+// Deprecated! Use HwthreadList()
+func CpuList() []int {
+	return HwthreadList()
+}
+
+// Get list of CPU core IDs in the order of listing in /proc/cpuinfo
 func CoreList() []int {
 	buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
 	if err != nil {
@@ -122,6 +132,7 @@ func CoreList() []int {
 	return corelist
 }

+// Get list of NUMA node IDs
 func NumaNodeList() []int {
 	numaList := make([]int, 0)
 	globPath := filepath.Join(string(SYSFS_NUMABASE), "node*")
@@ -156,8 +167,9 @@ func NumaNodeList() []int {
 	return numaList
 }

+// Get list of CPU die IDs
 func DieList() []int {
-	cpulist := CpuList()
+	cpulist := HwthreadList()
 	dielist := make([]int, 0)
 	for _, c := range cpulist {
 		diepath := filepath.Join(string(SYSFS_CPUBASE), fmt.Sprintf("cpu%d", c), "topology/die_id")
@@ -175,7 +187,27 @@ func DieList() []int {
 	return SocketList()
 }

-type CpuEntry struct {
+// Get list of specified type using the naming format inside ClusterCockpit
+func GetTypeList(topology_type string) []int {
+	switch topology_type {
+	case "node":
+		return []int{0}
+	case "socket":
+		return SocketList()
+	case "die":
+		return DieList()
+	case "memoryDomain":
+		return NumaNodeList()
+	case "core":
+		return CoreList()
+	case "hwthread":
+		return HwthreadList()
+	}
+	return []int{}
+}
+
+// Structure holding all information about a hardware thread
+type HwthreadEntry struct {
 	Cpuid      int
 	SMT        int
 	Core       int
@@ -184,25 +216,25 @@ type CpuEntry struct {
 	Die        int
 }

-func CpuData() []CpuEntry {
+func CpuData() []HwthreadEntry {

-	fileToInt := func(path string) int {
-		buffer, err := ioutil.ReadFile(path)
-		if err != nil {
-			log.Print(err)
-			//cclogger.ComponentError("ccTopology", "Reading", path, ":", err.Error())
-			return -1
-		}
-		sbuffer := strings.Replace(string(buffer), "\n", "", -1)
-		var id int64
-		//_, err = fmt.Scanf("%d", sbuffer, &id)
-		id, err = strconv.ParseInt(sbuffer, 10, 32)
-		if err != nil {
-			cclogger.ComponentError("ccTopology", "Parsing", path, ":", sbuffer, err.Error())
-			return -1
-		}
-		return int(id)
-	}
+	// fileToInt := func(path string) int {
+	// 	buffer, err := ioutil.ReadFile(path)
+	// 	if err != nil {
+	// 		log.Print(err)
+	// 		//cclogger.ComponentError("ccTopology", "Reading", path, ":", err.Error())
+	// 		return -1
+	// 	}
+	// 	sbuffer := strings.Replace(string(buffer), "\n", "", -1)
+	// 	var id int64
+	// 	//_, err = fmt.Scanf("%d", sbuffer, &id)
+	// 	id, err = strconv.ParseInt(sbuffer, 10, 32)
+	// 	if err != nil {
+	// 		cclogger.ComponentError("ccTopology", "Parsing", path, ":", sbuffer, err.Error())
+	// 		return -1
+	// 	}
+	// 	return int(id)
+	// }
 	getCore := func(basepath string) int {
 		return fileToInt(fmt.Sprintf("%s/core_id", basepath))
 	}
@@ -260,9 +292,9 @@ func CpuData() []CpuEntry {
 		return 0
 	}

-	clist := make([]CpuEntry, 0)
-	for _, c := range CpuList() {
-		clist = append(clist, CpuEntry{Cpuid: c})
+	clist := make([]HwthreadEntry, 0)
+	for _, c := range HwthreadList() {
+		clist = append(clist, HwthreadEntry{Cpuid: c})
 	}
 	for i, centry := range clist {
 		centry.Socket = -1
@@ -298,6 +330,7 @@ func CpuData() []CpuEntry {
 	return clist
 }

+// Structure holding basic information about a CPU
 type CpuInformation struct {
 	NumHWthreads   int
 	SMTWidth       int
@@ -307,6 +340,7 @@ type CpuInformation struct {
 	NumNumaDomains int
 }

+// Get basic information about the CPU
 func CpuInfo() CpuInformation {
 	var c CpuInformation

@@ -342,7 +376,8 @@ func CpuInfo() CpuInformation {
 	return c
 }

-func GetCpuSocket(cpuid int) int {
+// Get the CPU socket ID for a given hardware thread ID
+func GetHwthreadSocket(cpuid int) int {
 	cdata := CpuData()
 	for _, d := range cdata {
 		if d.Cpuid == cpuid {
@@ -352,7 +387,8 @@ func GetCpuSocket(cpuid int) int {
 	return -1
 }

-func GetCpuNumaDomain(cpuid int) int {
+// Get the NUMA node ID for a given hardware thread ID
+func GetHwthreadNumaDomain(cpuid int) int {
 	cdata := CpuData()
 	for _, d := range cdata {
 		if d.Cpuid == cpuid {
@@ -362,7 +398,8 @@ func GetCpuNumaDomain(cpuid int) int {
 	return -1
 }

-func GetCpuDie(cpuid int) int {
+// Get the CPU die ID for a given hardware thread ID
+func GetHwthreadDie(cpuid int) int {
 	cdata := CpuData()
 	for _, d := range cdata {
 		if d.Cpuid == cpuid {
@@ -372,7 +409,8 @@ func GetCpuDie(cpuid int) int {
 	return -1
 }

-func GetCpuCore(cpuid int) int {
+// Get the CPU core ID for a given hardware thread ID
+func GetHwthreadCore(cpuid int) int {
 	cdata := CpuData()
 	for _, d := range cdata {
 		if d.Cpuid == cpuid {
@@ -382,7 +420,8 @@ func GetCpuCore(cpuid int) int {
 	return -1
 }

-func GetSocketCpus(socket int) []int {
+// Get the all hardware thread ID associated with a CPU socket
+func GetSocketHwthreads(socket int) []int {
 	all := CpuData()
 	cpulist := make([]int, 0)
 	for _, d := range all {
@@ -393,7 +432,8 @@ func GetSocketCpus(socket int) []int {
 	return cpulist
 }

-func GetNumaDomainCpus(domain int) []int {
+// Get the all hardware thread ID associated with a NUMA node
+func GetNumaDomainHwthreads(domain int) []int {
 	all := CpuData()
 	cpulist := make([]int, 0)
 	for _, d := range all {
@@ -404,7 +444,8 @@ func GetNumaDomainCpus(domain int) []int {
 	return cpulist
 }

-func GetDieCpus(die int) []int {
+// Get the all hardware thread ID associated with a CPU die
+func GetDieHwthreads(die int) []int {
 	all := CpuData()
 	cpulist := make([]int, 0)
 	for _, d := range all {
@@ -415,7 +456,8 @@ func GetDieCpus(die int) []int {
 	return cpulist
 }

-func GetCoreCpus(core int) []int {
+// Get the all hardware thread ID associated with a CPU core
+func GetCoreHwthreads(core int) []int {
 	all := CpuData()
 	cpulist := make([]int, 0)
 	for _, d := range all {
--- a/internal/metricAggregator/metricAggregatorFunctions.go
+++ b/internal/metricAggregator/metricAggregatorFunctions.go
@@ -246,7 +246,7 @@ func matchfunc(args ...interface{}) (interface{}, error) {
 func getCpuCoreFunc(args ...interface{}) (interface{}, error) {
 	switch cpuid := args[0].(type) {
 	case int:
-		return topo.GetCpuCore(cpuid), nil
+		return topo.GetHwthreadCore(cpuid), nil
 	}
 	return -1, errors.New("function 'getCpuCore' accepts only an 'int' cpuid")
 }
@@ -255,7 +255,7 @@ func getCpuCoreFunc(args ...interface{}) (interface{}, error) {
 func getCpuSocketFunc(args ...interface{}) (interface{}, error) {
 	switch cpuid := args[0].(type) {
 	case int:
-		return topo.GetCpuSocket(cpuid), nil
+		return topo.GetHwthreadSocket(cpuid), nil
 	}
 	return -1, errors.New("function 'getCpuCore' accepts only an 'int' cpuid")
 }
@@ -264,7 +264,7 @@ func getCpuSocketFunc(args ...interface{}) (interface{}, error) {
 func getCpuNumaDomainFunc(args ...interface{}) (interface{}, error) {
 	switch cpuid := args[0].(type) {
 	case int:
-		return topo.GetCpuNumaDomain(cpuid), nil
+		return topo.GetHwthreadNumaDomain(cpuid), nil
 	}
 	return -1, errors.New("function 'getCpuNuma' accepts only an 'int' cpuid")
 }
@@ -273,7 +273,7 @@ func getCpuNumaDomainFunc(args ...interface{}) (interface{}, error) {
 func getCpuDieFunc(args ...interface{}) (interface{}, error) {
 	switch cpuid := args[0].(type) {
 	case int:
-		return topo.GetCpuDie(cpuid), nil
+		return topo.GetHwthreadDie(cpuid), nil
 	}
 	return -1, errors.New("function 'getCpuDie' accepts only an 'int' cpuid")
 }
@@ -336,7 +336,7 @@ func getCpuListOfDieFunc(args ...interface{}) (interface{}, error) {

 // wrapper function to get a list of all cpuids of the node
 func getCpuListOfNode(args ...interface{}) (interface{}, error) {
-	return topo.CpuList(), nil
+	return topo.HwthreadList(), nil
 }

 // helper function to get the cpuid list for a CCMetric type tag set (type and type-id)
@@ -348,14 +348,14 @@ func getCpuListOfType(args ...interface{}) (interface{}, error) {
 	case string:
 		switch typ {
 		case "node":
-			return topo.CpuList(), nil
+			return topo.HwthreadList(), nil
 		case "socket":
 			return getCpuListOfSocketFunc(args[1])
 		case "numadomain":
 			return getCpuListOfNumaDomainFunc(args[1])
 		case "core":
 			return getCpuListOfCoreFunc(args[1])
-		case "cpu":
+		case "hwthread":
 			var cpu int

 			switch id := args[1].(type) {
--- a/internal/metricRouter/README.md
+++ b/internal/metricRouter/README.md
@@ -52,6 +52,11 @@ The CCMetric router sits in between the collectors and the sinks and can be used
    ],
    "rename_metrics" : {
        "metric_12345" : "mymetric"
+    },
+    "normalize_units" : true,
+    "change_unit_prefix" : {
+      "mem_used" : "G",
+      "mem_total" : "G"
    }
 }
 ```
@@ -192,6 +197,14 @@ This option takes a list of evaluable conditions and performs them one after the
 ```
 The first line is comparable with the example in `drop_metrics`, it drops all metrics starting with `drop_metric_` and ending with a number. The second line drops all metrics of the first hardware thread (**not** recommended)

+# Manipulating the metric units
+
+## The `normalize_units` option
+The cc-metric-collector tries to read the data from the system as it is reported. If available, it tries to read the metric unit from the system as well (e.g. from `/proc/meminfo`). The problem is that, depending on the source, the metric units are named differently. Just think about `byte`, `Byte`, `B`, `bytes`, ...
+The [cc-units](https://github.com/ClusterCockpit/cc-units) package provides us a normalization option to use the same metric unit name for all metrics. It this option is set to true, all `unit` meta tags are normalized.
+
+## The `change_unit_prefix` section
+It is often the case that metrics are reported by the system using a rather outdated unit prefix (like `/proc/meminfo` still uses kByte despite current memory sizes are in the GByte range). If you want to change the prefix of a unit, you can do that with the help of [cc-units](https://github.com/ClusterCockpit/cc-units). The setting works on the metric name and requires the new prefix for the metric. The cc-units package determines the scaling factor.

 # Aggregate metric values of the current interval with the `interval_aggregates` option

@@ -239,3 +252,22 @@ Use cases for `interval_aggregates`:
    }
  }
 ```
+
+# Order of operations
+
+The router performs the above mentioned options in a specific order. In order to get the logic you want for a specific metric, it is crucial to know the processing order:
+
+- Add the `hostname` tag (c)
+- Manipulate the timestamp to the interval timestamp (c,r)
+- Drop metrics based on `drop_metrics` and `drop_metrics_if` (c,r)
+- Add tags based on `add_tags` (c,r)
+- Delete tags based on `del_tags` (c,r)
+- Rename metric based on `rename_metric` (c,r)
+  - Add tags based on `add_tags` to still work if the configuration uses the new name (c,r) 
+  - Delete tags based on `del_tags` to still work if the configuration uses the new name (c,r)
+- Normalize units when `normalize_units` is set (c,r)
+- Convert unit prefix based on `change_unit_prefix` (c,r)
+
+Legend:
+- 'c' if metric is coming from a collector
+- 'r' if metric is coming from a receiver
--- a/internal/metricRouter/metricRouter.go
+++ b/internal/metricRouter/metricRouter.go
@@ -12,6 +12,7 @@ import (
 	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 	agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
 	mct "github.com/ClusterCockpit/cc-metric-collector/internal/multiChanTicker"
+	units "github.com/ClusterCockpit/cc-units"
 )

 const ROUTER_MAX_FORWARD = 50
@@ -35,6 +36,8 @@ type metricRouterConfig struct {
 	IntervalStamp     bool                                 `json:"interval_timestamp"`  // Update timestamp periodically by ticker each interval?
 	NumCacheIntervals int                                  `json:"num_cache_intervals"` // Number of intervals of cached metrics for evaluation
 	MaxForward        int                                  `json:"max_forward"`         // Number of maximal forwarded metrics at one select
+	NormalizeUnits    bool                                 `json:"normalize_units"`     // Check unit meta flag and normalize it using cc-units
+	ChangeUnitPrefix  map[string]string                    `json:"change_unit_prefix"`  // Add prefix that should be applied to the metrics
 	dropMetrics       map[string]bool                      // Internal map for O(1) lookup
 }

@@ -48,7 +51,6 @@ type metricRouter struct {
 	done        chan bool           // channel to finish / stop metric router
 	wg          *sync.WaitGroup     // wait group for all goroutines in cc-metric-collector
 	timestamp   time.Time           // timestamp periodically updated by ticker each interval
-	timerdone   chan bool           // channel to finish / stop timestamp updater
 	ticker      mct.MultiChanTicker // periodically ticking once each interval
 	config      metricRouterConfig  // json encoded config for metric router
 	cache       MetricCache         // pointer to MetricCache
@@ -124,29 +126,6 @@ func (r *metricRouter) Init(ticker mct.MultiChanTicker, wg *sync.WaitGroup, rout
 	return nil
 }

-// StartTimer starts a timer which updates timestamp periodically
-func (r *metricRouter) StartTimer() {
-	m := make(chan time.Time)
-	r.ticker.AddChannel(m)
-	r.timerdone = make(chan bool)
-
-	r.wg.Add(1)
-	go func() {
-		defer r.wg.Done()
-		for {
-			select {
-			case <-r.timerdone:
-				close(r.timerdone)
-				cclog.ComponentDebug("MetricRouter", "TIMER DONE")
-				return
-			case t := <-m:
-				r.timestamp = t
-			}
-		}
-	}()
-	cclog.ComponentDebug("MetricRouter", "TIMER START")
-}
-
 func getParamMap(point lp.CCMetric) map[string]interface{} {
 	params := make(map[string]interface{})
 	params["metric"] = point
@@ -231,12 +210,45 @@ func (r *metricRouter) dropMetric(point lp.CCMetric) bool {
 	return false
 }

+func (r *metricRouter) prepareUnit(point lp.CCMetric) bool {
+	if r.config.NormalizeUnits {
+		if in_unit, ok := point.GetMeta("unit"); ok {
+			u := units.NewUnit(in_unit)
+			if u.Valid() {
+				point.AddMeta("unit", u.Short())
+			}
+		}
+	}
+	if newP, ok := r.config.ChangeUnitPrefix[point.Name()]; ok {
+
+		newPrefix := units.NewPrefix(newP)
+
+		if in_unit, ok := point.GetMeta("unit"); ok && newPrefix != units.InvalidPrefix {
+			u := units.NewUnit(in_unit)
+			if u.Valid() {
+				cclog.ComponentDebug("MetricRouter", "Change prefix to", newP, "for metric", point.Name())
+				conv, out_unit := units.GetUnitPrefixFactor(u, newPrefix)
+				if conv != nil && out_unit.Valid() {
+					if val, ok := point.GetField("value"); ok {
+						point.AddField("value", conv(val))
+						point.AddMeta("unit", out_unit.Short())
+					}
+				}
+			}
+
+		}
+	}
+
+	return true
+}
+
 // Start starts the metric router
 func (r *metricRouter) Start() {
 	// start timer if configured
 	r.timestamp = time.Now()
+	timeChan := make(chan time.Time)
 	if r.config.IntervalStamp {
-		r.StartTimer()
+		r.ticker.AddChannel(timeChan)
 	}

 	// Router manager is done
@@ -255,9 +267,11 @@ func (r *metricRouter) Start() {
 		if new, ok := r.config.RenameMetrics[name]; ok {
 			point.SetName(new)
 			point.AddMeta("oldname", name)
+			r.DoAddTags(point)
+			r.DoDelTags(point)
 		}
-		r.DoAddTags(point)
-		r.DoDelTags(point)
+
+		r.prepareUnit(point)

 		for _, o := range r.outputs {
 			o <- point
@@ -316,6 +330,10 @@ func (r *metricRouter) Start() {
 				done()
 				return

+			case timestamp := <-timeChan:
+				r.timestamp = timestamp
+				cclog.ComponentDebug("MetricRouter", "Update timestamp", r.timestamp.UnixNano())
+
 			case p := <-r.coll_input:
 				coll_forward(p)
 				for i := 0; len(r.coll_input) > 0 && i < (r.maxForward-1); i++ {
@@ -361,14 +379,6 @@ func (r *metricRouter) Close() {
 	// wait for close of channel r.done
 	<-r.done

-	// stop timer
-	if r.config.IntervalStamp {
-		cclog.ComponentDebug("MetricRouter", "TIMER CLOSE")
-		r.timerdone <- true
-		// wait for close of channel r.timerdone
-		<-r.timerdone
-	}
-
 	// stop metric cache
 	if r.config.NumCacheIntervals > 0 {
 		cclog.ComponentDebug("MetricRouter", "CACHE CLOSE")
--- a/receivers.json
+++ b/receivers.json
@@ -4,5 +4,22 @@
        "address": "nats://my-url",
        "port" : "4222",
        "database": "testcluster"
+    },
+    "redfish_recv": {
+        "type": "redfish",
+        "client_config": [
+            {
+                "hostname": "my-host-1",
+                "username": "username-1",
+                "password": "password-1",
+                "endpoint": "https://my-endpoint-1"
+            },
+            {
+                "hostname": "my-host-2",
+                "username": "username-2",
+                "password": "password-2",
+                "endpoint": "https://my-endpoint-2"
+            }
+        ]
    }
 }
--- a/receivers/receiveManager.go
+++ b/receivers/receiveManager.go
@@ -10,14 +10,13 @@ import (
 )

 var AvailableReceivers = map[string]func(name string, config json.RawMessage) (Receiver, error){
-	"nats": NewNatsReceiver,
+	"nats":    NewNatsReceiver,
+	"redfish": NewRedfishReceiver,
 }

 type receiveManager struct {
 	inputs []Receiver
 	output chan lp.CCMetric
-	done   chan bool
-	wg     *sync.WaitGroup
 	config []json.RawMessage
 }

@@ -33,8 +32,6 @@ func (rm *receiveManager) Init(wg *sync.WaitGroup, receiverConfigFile string) er
 	// Initialize struct fields
 	rm.inputs = make([]Receiver, 0)
 	rm.output = nil
-	rm.done = make(chan bool)
-	rm.wg = wg
 	rm.config = make([]json.RawMessage, 0)

 	configFile, err := os.Open(receiverConfigFile)
@@ -58,7 +55,7 @@ func (rm *receiveManager) Init(wg *sync.WaitGroup, receiverConfigFile string) er
 }

 func (rm *receiveManager) Start() {
-	rm.wg.Add(1)
+	cclog.ComponentDebug("ReceiveManager", "START")

 	for _, r := range rm.inputs {
 		cclog.ComponentDebug("ReceiveManager", "START", r.Name())
@@ -97,16 +94,19 @@ func (rm *receiveManager) AddOutput(output chan lp.CCMetric) {
 }

 func (rm *receiveManager) Close() {
+	cclog.ComponentDebug("ReceiveManager", "CLOSE")
+
+	// Close all receivers
 	for _, r := range rm.inputs {
 		cclog.ComponentDebug("ReceiveManager", "CLOSE", r.Name())
 		r.Close()
 	}
-	rm.wg.Done()
-	cclog.ComponentDebug("ReceiveManager", "CLOSE")
+
+	cclog.ComponentDebug("ReceiveManager", "DONE")
 }

 func New(wg *sync.WaitGroup, receiverConfigFile string) (ReceiveManager, error) {
-	r := &receiveManager{}
+	r := new(receiveManager)
 	err := r.Init(wg, receiverConfigFile)
 	if err != nil {
 		return nil, err
--- a/receivers/redfishReceiver.go
+++ b/receivers/redfishReceiver.go
@@ -0,0 +1,324 @@
+package receivers
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"sync"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+
+	// See: https://pkg.go.dev/github.com/stmcginnis/gofish
+	"github.com/stmcginnis/gofish"
+)
+
+// RedfishReceiver configuration:
+type RedfishReceiver struct {
+	receiver
+	config struct {
+		Type     string `json:"type"`
+		Fanout   int    `json:"fanout,omitempty"`   // Default fanout: 64
+		Interval int    `json:"interval,omitempty"` // Default interval: 30s
+
+		// Client config for each redfish service
+		ClientConfigs []struct {
+			Hostname       *string  `json:"hostname"`
+			Username       *string  `json:"username"`
+			Password       *string  `json:"password"`
+			Endpoint       *string  `json:"endpoint"`
+			Insecure       *bool    `json:"insecure,omitempty"`
+			ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
+			gofish         gofish.ClientConfig
+		} `json:"client_config"`
+	}
+
+	done chan bool      // channel to finish / stop redfish receiver
+	wg   sync.WaitGroup // wait group for redfish receiver
+}
+
+// Start starts the redfish receiver
+func (r *RedfishReceiver) Start() {
+	cclog.ComponentDebug(r.name, "START")
+
+	// readPowerMetric reads readfish power metric from the endpoint configured in conf
+	readPowerMetric := func(clientConfigIndex int) error {
+
+		clientConfig := &r.config.ClientConfigs[clientConfigIndex]
+
+		// Connect to redfish service
+		c, err := gofish.Connect(clientConfig.gofish)
+		if err != nil {
+			c := struct {
+				Username  string
+				Endpoint  string
+				BasicAuth bool
+				Insecure  bool
+			}{
+				Username:  clientConfig.gofish.Username,
+				Endpoint:  clientConfig.gofish.Endpoint,
+				BasicAuth: clientConfig.gofish.BasicAuth,
+				Insecure:  clientConfig.gofish.Insecure,
+			}
+			return fmt.Errorf("readPowerMetric: gofish.Connect(%+v) failed: %v", c, err)
+		}
+		defer c.Logout()
+
+		// Get all chassis managed by this service
+		chassis_list, err := c.Service.Chassis()
+		if err != nil {
+			return fmt.Errorf("readPowerMetric: c.Service.Chassis() failed: %v", err)
+		}
+
+		for _, chassis := range chassis_list {
+			timestamp := time.Now()
+
+			// Get power information for each chassis
+			power, err := chassis.Power()
+			if err != nil {
+				return fmt.Errorf("readPowerMetric: chassis.Power() failed: %v", err)
+			}
+			if power == nil {
+				continue
+			}
+
+			// Read min, max and average consumed watts for each power control
+			for _, pc := range power.PowerControl {
+
+				// Map of collected metrics
+				metrics := map[string]float32{
+					// PowerConsumedWatts shall represent the actual power being consumed (in
+					// Watts) by the chassis
+					"consumed_watts": pc.PowerConsumedWatts,
+					// AverageConsumedWatts shall represent the
+					// average power level that occurred averaged over the last IntervalInMin
+					// minutes.
+					"average_consumed_watts": pc.PowerMetrics.AverageConsumedWatts,
+					// MinConsumedWatts shall represent the
+					// minimum power level in watts that occurred within the last
+					// IntervalInMin minutes.
+					"min_consumed_watts": pc.PowerMetrics.MinConsumedWatts,
+					// MaxConsumedWatts shall represent the
+					// maximum power level in watts that occurred within the last
+					// IntervalInMin minutes
+					"max_consumed_watts": pc.PowerMetrics.MaxConsumedWatts,
+				}
+				intervalInMin := strconv.FormatFloat(float64(pc.PowerMetrics.IntervalInMin), 'f', -1, 32)
+
+				// Metrics to exclude
+				for _, key := range clientConfig.ExcludeMetrics {
+					delete(metrics, key)
+				}
+
+				// Set tags
+				tags := map[string]string{
+					"hostname": *clientConfig.Hostname,
+					"type":     "node",
+					// ID uniquely identifies the resource
+					"id": pc.ID,
+					// MemberID shall uniquely identify the member within the collection. For
+					// services supporting Redfish v1.6 or higher, this value shall be the
+					// zero-based array index.
+					"member_id": pc.MemberID,
+					// PhysicalContext shall be a description of the affected device(s) or region
+					// within the chassis to which this power control applies.
+					"physical_context": string(pc.PhysicalContext),
+					// Name
+					"power_control_name": pc.Name,
+				}
+
+				// Delete empty tags
+				for key, value := range tags {
+					if value == "" {
+						delete(tags, key)
+					}
+				}
+
+				// Set meta data tags
+				meta := map[string]string{
+					"source":              r.name,
+					"group":               "Energy",
+					"interval_in_minutes": intervalInMin,
+					"unit":                "watts",
+				}
+
+				// Delete empty meta data tags
+				for key, value := range meta {
+					if value == "" {
+						delete(meta, key)
+					}
+				}
+
+				for name, value := range metrics {
+
+					y, err := lp.New(name, tags, meta,
+						map[string]interface{}{
+							"value": value,
+						},
+						timestamp)
+					if err == nil {
+						r.sink <- y
+					}
+				}
+			}
+		}
+
+		return nil
+	}
+
+	// doReadPowerMetric read power metrics for all configure redfish services.
+	// To compensate latencies of the Redfish services a fanout is used.
+	doReadPowerMetric := func() {
+
+		// Compute fanout to use
+		realFanout := r.config.Fanout
+		if len(r.config.ClientConfigs) < realFanout {
+			realFanout = len(r.config.ClientConfigs)
+		}
+
+		// Create wait group and input channel for workers
+		var workerWaitGroup sync.WaitGroup
+		workerInput := make(chan int, realFanout)
+
+		// Create worker go routines
+		for i := 0; i < realFanout; i++ {
+			// Increment worker wait group counter
+			workerWaitGroup.Add(1)
+			go func() {
+				// Decrement worker wait group counter
+				defer workerWaitGroup.Done()
+
+				// Read power metrics for each client config
+				for clientConfigIndex := range workerInput {
+					err := readPowerMetric(clientConfigIndex)
+					if err != nil {
+						cclog.ComponentError(r.name, err)
+					}
+				}
+			}()
+		}
+
+		// Distribute client configs to workers
+		for i := range r.config.ClientConfigs {
+			// Check done channel status
+			select {
+			case workerInput <- i:
+			case <-r.done:
+				// process done event
+				// Stop workers, clear channel and wait for all workers to finish
+				close(workerInput)
+				for range workerInput {
+				}
+				workerWaitGroup.Wait()
+				return
+			}
+		}
+
+		// Stop workers and wait for all workers to finish
+		close(workerInput)
+		workerWaitGroup.Wait()
+	}
+
+	// Start redfish receiver
+	r.wg.Add(1)
+	go func() {
+		defer r.wg.Done()
+
+		// Create ticker
+		ticker := time.NewTicker(time.Duration(r.config.Interval) * time.Second)
+		defer ticker.Stop()
+
+		for {
+			doReadPowerMetric()
+
+			select {
+			case <-ticker.C:
+				// process ticker event -> continue
+				continue
+			case <-r.done:
+				// process done event
+				return
+			}
+		}
+	}()
+
+	cclog.ComponentDebug(r.name, "STARTED")
+}
+
+// Close redfish receiver
+func (r *RedfishReceiver) Close() {
+	cclog.ComponentDebug(r.name, "CLOSE")
+
+	// Send the signal and wait
+	close(r.done)
+	r.wg.Wait()
+
+	cclog.ComponentDebug(r.name, "DONE")
+}
+
+// New function to create a new instance of the receiver
+// Initialize the receiver by giving it a name and reading in the config JSON
+func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
+	r := new(RedfishReceiver)
+
+	// Set name
+	r.name = fmt.Sprintf("RedfishReceiver(%s)", name)
+
+	// Create done channel
+	r.done = make(chan bool)
+
+	// Set defaults in r.config
+	// Allow overwriting these defaults by reading config JSON
+	r.config.Fanout = 64
+	r.config.Interval = 30
+
+	// Read the redfish receiver specific JSON config
+	if len(config) > 0 {
+		err := json.Unmarshal(config, &r.config)
+		if err != nil {
+			cclog.ComponentError(r.name, "Error reading config:", err.Error())
+			return nil, err
+		}
+	}
+
+	// Create gofish client config
+	for i := range r.config.ClientConfigs {
+		clientConfig := &r.config.ClientConfigs[i]
+		gofishConfig := &clientConfig.gofish
+
+		if clientConfig.Hostname == nil {
+			err := fmt.Errorf("client config number %v requires hostname", i)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+
+		if clientConfig.Endpoint == nil {
+			err := fmt.Errorf("client config number %v requires endpoint", i)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+		gofishConfig.Endpoint = *clientConfig.Endpoint
+
+		if clientConfig.Username == nil {
+			err := fmt.Errorf("client config number %v requires username", i)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+		gofishConfig.Username = *clientConfig.Username
+
+		if clientConfig.Password == nil {
+			err := fmt.Errorf("client config number %v requires password", i)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+		gofishConfig.Password = *clientConfig.Password
+
+		gofishConfig.Insecure = true
+		if clientConfig.Insecure != nil {
+			gofishConfig.Insecure = *clientConfig.Insecure
+		}
+	}
+
+	return r, nil
+}
--- a/receivers/sampleReceiver.go
+++ b/receivers/sampleReceiver.go
@@ -36,16 +36,26 @@ func (r *SampleReceiver) Start() {

 	// or use own go routine but always make sure it exits
 	// as soon as it gets the signal of the r.done channel
+	//
+	// r.done = make(chan bool)
 	// r.wg.Add(1)
 	// go func() {
-	// 	for {
-	// 		select {
-	// 		case <-r.done:
-	// 			r.wg.Done()
-	// 			return
-	// 		}
-	// 	}
-	// 	r.wg.Done()
+	//      defer r.wg.Done()
+	//
+	//      // Create ticker
+	//      ticker := time.NewTicker(30 * time.Second)
+	//      defer ticker.Stop()
+	//
+	//      for {
+	//          readMetric()
+	//          select {
+	//          case <-ticker.C:
+	//              // process ticker event -> continue
+	//              continue
+	//          case <-r.done:
+	//              return
+	//          }
+	//      }
 	// }()
 }

--- a/scripts/cc-metric-collector.config
+++ b/scripts/cc-metric-collector.config
@@ -15,3 +15,9 @@ CONF_DIR=/etc/cc-metric-collector
 CONF_FILE=/etc/cc-metric-collector/cc-metric-collector.json

 RESTART_ON_UPGRADE=true
+
+# Golang runtime debugging. (see: https://pkg.go.dev/runtime)
+# GODEBUG=gctrace=1
+
+# Golang garbage collection target percentage
+# GOGC=100
--- a/scripts/cc-metric-collector.init
+++ b/scripts/cc-metric-collector.init
@@ -75,7 +75,7 @@ case "$1" in
 	fi

 	# Start Daemon
-	start-stop-daemon --start -b --chdir "$WORK_DIR" --user "$CC_USER" -c "$CC_USER" --pidfile "$PID_FILE" --exec $DAEMON -- $DAEMON_OPTS
+	start-stop-daemon --start -b --chdir "$WORK_DIR" --user "$CC_USER" -c "$CC_USER" --pidfile "$PID_FILE" --exec $DAEMON -- $CC_OPTS
 	return=$?
 	if [ $return -eq 0 ]
 	then
--- a/scripts/likwid_perfgroup_to_cc_config.py
+++ b/scripts/likwid_perfgroup_to_cc_config.py
@@ -39,7 +39,7 @@ def group_to_json(groupfile):
            llist = re.split("\s+", line)
            calc = llist[-1]
            metric = " ".join(llist[:-1])
-            scope = "cpu"
+            scope = "hwthread"
            if "BOX" in calc:
                scope = "socket"
            if "PWR" in calc:
--- a/sinks.json
+++ b/sinks.json
@@ -1,6 +1,8 @@
 {
-  "mystdout" : {
-    "type" : "stdout",
-    "meta_as_tags" : true
+  "mystdout": {
+    "type": "stdout",
+    "meta_as_tags": [
+      "unit"
+    ]
  }
-}
+}
--- a/sinks/httpSink.go
+++ b/sinks/httpSink.go
@@ -19,9 +19,9 @@ type HttpSinkConfig struct {
 	URL             string `json:"url,omitempty"`
 	JWT             string `json:"jwt,omitempty"`
 	Timeout         string `json:"timeout,omitempty"`
-	MaxIdleConns    int    `json:"max_idle_connections,omitempty"`
 	IdleConnTimeout string `json:"idle_connection_timeout,omitempty"`
 	FlushDelay      string `json:"flush_delay,omitempty"`
+	MaxRetries      int    `json:"max_retries,omitempty"`
 }

 type HttpSink struct {
@@ -32,80 +32,87 @@ type HttpSink struct {
 	buffer          *bytes.Buffer
 	flushTimer      *time.Timer
 	config          HttpSinkConfig
-	maxIdleConns    int
 	idleConnTimeout time.Duration
 	timeout         time.Duration
 	flushDelay      time.Duration
 }

 func (s *HttpSink) Write(m lp.CCMetric) error {
-	if s.buffer.Len() == 0 && s.flushDelay != 0 {
-		// This is the first write since the last flush, start the flushTimer!
-		if s.flushTimer != nil && s.flushTimer.Stop() {
-			cclog.ComponentDebug("HttpSink", "unexpected: the flushTimer was already running?")
-		}
-
-		// Run a batched flush for all lines that have arrived in the last second
-		s.flushTimer = time.AfterFunc(s.flushDelay, func() {
-			if err := s.Flush(); err != nil {
-				cclog.ComponentError("HttpSink", "flush failed:", err.Error())
-			}
-		})
-	}
-
 	p := m.ToPoint(s.meta_as_tags)
-
 	s.lock.Lock()
+	firstWriteOfBatch := s.buffer.Len() == 0
 	_, err := s.encoder.Encode(p)
-	s.lock.Unlock() // defer does not work here as Flush() takes the lock as well
-
+	s.lock.Unlock()
 	if err != nil {
+		cclog.ComponentError(s.name, "encoding failed:", err.Error())
 		return err
 	}

-	// Flush synchronously if "flush_delay" is zero
 	if s.flushDelay == 0 {
 		return s.Flush()
 	}

-	return err
+	if firstWriteOfBatch {
+		if s.flushTimer == nil {
+			s.flushTimer = time.AfterFunc(s.flushDelay, func() {
+				if err := s.Flush(); err != nil {
+					cclog.ComponentError(s.name, "flush failed:", err.Error())
+				}
+			})
+		} else {
+			s.flushTimer.Reset(s.flushDelay)
+		}
+	}
+
+	return nil
 }

 func (s *HttpSink) Flush() error {
-	// buffer is read by client.Do, prevent concurrent modifications
+	// Own lock for as short as possible: the time it takes to copy the buffer.
 	s.lock.Lock()
-	defer s.lock.Unlock()
-
-	// Do not flush empty buffer
-	if s.buffer.Len() == 0 {
+	buf := make([]byte, s.buffer.Len())
+	copy(buf, s.buffer.Bytes())
+	s.buffer.Reset()
+	s.lock.Unlock()
+	if len(buf) == 0 {
 		return nil
 	}

-	// Create new request to send buffer
-	req, err := http.NewRequest(http.MethodPost, s.config.URL, s.buffer)
-	if err != nil {
-		return err
+	var res *http.Response
+	for i := 0; i < s.config.MaxRetries; i++ {
+		// Create new request to send buffer
+		req, err := http.NewRequest(http.MethodPost, s.config.URL, bytes.NewReader(buf))
+		if err != nil {
+			cclog.ComponentError(s.name, "failed to create request:", err.Error())
+			return err
+		}
+
+		// Set authorization header
+		if len(s.config.JWT) != 0 {
+			req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", s.config.JWT))
+		}
+
+		// Do request
+		res, err = s.client.Do(req)
+		if err != nil {
+			cclog.ComponentError(s.name, "transport/tcp error:", err.Error())
+			// Wait between retries
+			time.Sleep(time.Duration(i+1) * (time.Second / 2))
+			continue
+		}
+
+		break
 	}

-	// Set authorization header
-	if len(s.config.JWT) != 0 {
-		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", s.config.JWT))
-	}
-
-	// Send
-	res, err := s.client.Do(req)
-
-	// Clear buffer
-	s.buffer.Reset()
-
-	// Handle transport/tcp errors
-	if err != nil {
-		return err
+	if res == nil {
+		return errors.New("flush failed due to repeated errors")
 	}

 	// Handle application errors
 	if res.StatusCode != http.StatusOK {
-		return errors.New(res.Status)
+		err := errors.New(res.Status)
+		cclog.ComponentError(s.name, "application error:", err.Error())
+		return err
 	}

 	return nil
@@ -114,7 +121,7 @@ func (s *HttpSink) Flush() error {
 func (s *HttpSink) Close() {
 	s.flushTimer.Stop()
 	if err := s.Flush(); err != nil {
-		cclog.ComponentError("HttpSink", "flush failed:", err.Error())
+		cclog.ComponentError(s.name, "flush failed:", err.Error())
 	}
 	s.client.CloseIdleConnections()
 }
@@ -123,10 +130,10 @@ func NewHttpSink(name string, config json.RawMessage) (Sink, error) {
 	s := new(HttpSink)
 	// Set default values
 	s.name = fmt.Sprintf("HttpSink(%s)", name)
-	s.config.MaxIdleConns = 10
-	s.config.IdleConnTimeout = "5s"
+	s.config.IdleConnTimeout = "120s" // should be larger than the measurement interval.
 	s.config.Timeout = "5s"
-	s.config.FlushDelay = "1s"
+	s.config.FlushDelay = "5s"
+	s.config.MaxRetries = 3

 	// Read config
 	if len(config) > 0 {
@@ -138,9 +145,6 @@ func NewHttpSink(name string, config json.RawMessage) (Sink, error) {
 	if len(s.config.URL) == 0 {
 		return nil, errors.New("`url` config option is required for HTTP sink")
 	}
-	if s.config.MaxIdleConns > 0 {
-		s.maxIdleConns = s.config.MaxIdleConns
-	}
 	if len(s.config.IdleConnTimeout) > 0 {
 		t, err := time.ParseDuration(s.config.IdleConnTimeout)
 		if err == nil {
@@ -165,7 +169,7 @@ func NewHttpSink(name string, config json.RawMessage) (Sink, error) {
 		s.meta_as_tags[k] = true
 	}
 	tr := &http.Transport{
-		MaxIdleConns:    s.maxIdleConns,
+		MaxIdleConns:    1, // We will only ever talk to one host.
 		IdleConnTimeout: s.idleConnTimeout,
 	}
 	s.client = &http.Client{Transport: tr, Timeout: s.timeout}
--- a/sinks/influxAsyncSink.go
+++ b/sinks/influxAsyncSink.go
@@ -6,12 +6,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"strings"
 	"time"

 	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
 	influxdb2Api "github.com/influxdata/influxdb-client-go/v2/api"
+	influxdb2ApiHttp "github.com/influxdata/influxdb-client-go/v2/api/http"
 )

 type InfluxAsyncSinkConfig struct {
@@ -23,15 +25,16 @@ type InfluxAsyncSinkConfig struct {
 	Password     string `json:"password,omitempty"`
 	Organization string `json:"organization,omitempty"`
 	SSL          bool   `json:"ssl,omitempty"`
-	RetentionPol string `json:"retention_policy,omitempty"`
 	// Maximum number of points sent to server in single request. Default 5000
 	BatchSize uint `json:"batch_size,omitempty"`
 	// Interval, in ms, in which is buffer flushed if it has not been already written (by reaching batch size) . Default 1000ms
 	FlushInterval         uint   `json:"flush_interval,omitempty"`
-	InfluxRetryInterval   string `json:"retry_interval"`
-	InfluxExponentialBase uint   `json:"retry_exponential_base"`
-	InfluxMaxRetries      uint   `json:"max_retries"`
-	InfluxMaxRetryTime    string `json:"max_retry_time"`
+	InfluxRetryInterval   string `json:"retry_interval,omitempty"`
+	InfluxExponentialBase uint   `json:"retry_exponential_base,omitempty"`
+	InfluxMaxRetries      uint   `json:"max_retries,omitempty"`
+	InfluxMaxRetryTime    string `json:"max_retry_time,omitempty"`
+	CustomFlushInterval   string `json:"custom_flush_interval,omitempty"`
+	MaxRetryAttempts      uint   `json:"max_retry_attempts,omitempty"`
 }

 type InfluxAsyncSink struct {
@@ -42,6 +45,8 @@ type InfluxAsyncSink struct {
 	config              InfluxAsyncSinkConfig
 	influxRetryInterval uint
 	influxMaxRetryTime  uint
+	customFlushInterval time.Duration
+	flushTimer          *time.Timer
 }

 func (s *InfluxAsyncSink) connect() error {
@@ -60,20 +65,34 @@ func (s *InfluxAsyncSink) connect() error {
 	cclog.ComponentDebug(s.name, "Using URI", uri, "Org", s.config.Organization, "Bucket", s.config.Database)
 	clientOptions := influxdb2.DefaultOptions()
 	if s.config.BatchSize != 0 {
+		cclog.ComponentDebug(s.name, "Batch size", s.config.BatchSize)
 		clientOptions.SetBatchSize(s.config.BatchSize)
 	}
 	if s.config.FlushInterval != 0 {
+		cclog.ComponentDebug(s.name, "Flush interval", s.config.FlushInterval)
 		clientOptions.SetFlushInterval(s.config.FlushInterval)
 	}
+	if s.influxRetryInterval != 0 {
+		cclog.ComponentDebug(s.name, "MaxRetryInterval", s.influxRetryInterval)
+		clientOptions.SetMaxRetryInterval(s.influxRetryInterval)
+	}
+	if s.influxMaxRetryTime != 0 {
+		cclog.ComponentDebug(s.name, "MaxRetryTime", s.influxMaxRetryTime)
+		clientOptions.SetMaxRetryTime(s.influxMaxRetryTime)
+	}
+	if s.config.InfluxExponentialBase != 0 {
+		cclog.ComponentDebug(s.name, "Exponential Base", s.config.InfluxExponentialBase)
+		clientOptions.SetExponentialBase(s.config.InfluxExponentialBase)
+	}
+	if s.config.InfluxMaxRetries != 0 {
+		cclog.ComponentDebug(s.name, "Max Retries", s.config.InfluxMaxRetries)
+		clientOptions.SetMaxRetries(s.config.InfluxMaxRetries)
+	}
 	clientOptions.SetTLSConfig(
 		&tls.Config{
 			InsecureSkipVerify: true,
 		},
-	)
-	clientOptions.SetMaxRetryInterval(s.influxRetryInterval)
-	clientOptions.SetMaxRetryTime(s.influxMaxRetryTime)
-	clientOptions.SetExponentialBase(s.config.InfluxExponentialBase)
-	clientOptions.SetMaxRetries(s.config.InfluxMaxRetries)
+	).SetPrecision(time.Second)

 	s.client = influxdb2.NewClientWithOptions(uri, auth, clientOptions)
 	s.writeApi = s.client.WriteAPI(s.config.Organization, s.config.Database)
@@ -84,10 +103,23 @@ func (s *InfluxAsyncSink) connect() error {
 	if !ok {
 		return fmt.Errorf("connection to %s not healthy", uri)
 	}
+	s.writeApi.SetWriteFailedCallback(func(batch string, err influxdb2ApiHttp.Error, retryAttempts uint) bool {
+		mlist := strings.Split(batch, "\n")
+		cclog.ComponentError(s.name, fmt.Sprintf("Failed to write batch with %d metrics %d times (max: %d): %s", len(mlist), retryAttempts, s.config.MaxRetryAttempts, err.Error()))
+		return retryAttempts <= s.config.MaxRetryAttempts
+	})
 	return nil
 }

 func (s *InfluxAsyncSink) Write(m lp.CCMetric) error {
+	if s.customFlushInterval != 0 && s.flushTimer == nil {
+		// Run a batched flush for all lines that have arrived in the defined interval
+		s.flushTimer = time.AfterFunc(s.customFlushInterval, func() {
+			if err := s.Flush(); err != nil {
+				cclog.ComponentError(s.name, "flush failed:", err.Error())
+			}
+		})
+	}
 	s.writeApi.WritePoint(
 		m.ToPoint(s.meta_as_tags),
 	)
@@ -95,7 +127,11 @@ func (s *InfluxAsyncSink) Write(m lp.CCMetric) error {
 }

 func (s *InfluxAsyncSink) Flush() error {
+	cclog.ComponentDebug(s.name, "Flushing")
 	s.writeApi.Flush()
+	if s.customFlushInterval != 0 && s.flushTimer != nil {
+		s.flushTimer = nil
+	}
 	return nil
 }

@@ -110,13 +146,17 @@ func NewInfluxAsyncSink(name string, config json.RawMessage) (Sink, error) {
 	s.name = fmt.Sprintf("InfluxSink(%s)", name)

 	// Set default for maximum number of points sent to server in single request.
-	s.config.BatchSize = 100
-	s.influxRetryInterval = uint(time.Duration(1) * time.Second)
-	s.config.InfluxRetryInterval = "1s"
-	s.influxMaxRetryTime = uint(7 * time.Duration(24) * time.Hour)
-	s.config.InfluxMaxRetryTime = "168h"
-	s.config.InfluxMaxRetries = 20
-	s.config.InfluxExponentialBase = 2
+	s.config.BatchSize = 0
+	s.influxRetryInterval = 0
+	//s.config.InfluxRetryInterval = "1s"
+	s.influxMaxRetryTime = 0
+	//s.config.InfluxMaxRetryTime = "168h"
+	s.config.InfluxMaxRetries = 0
+	s.config.InfluxExponentialBase = 0
+	s.config.FlushInterval = 0
+	s.config.CustomFlushInterval = ""
+	s.customFlushInterval = time.Duration(0)
+	s.config.MaxRetryAttempts = 1

 	// Default retry intervals (in seconds)
 	// 1 2
@@ -145,12 +185,17 @@ func NewInfluxAsyncSink(name string, config json.RawMessage) (Sink, error) {
 			return nil, err
 		}
 	}
-	if len(s.config.Host) == 0 ||
-		len(s.config.Port) == 0 ||
-		len(s.config.Database) == 0 ||
-		len(s.config.Organization) == 0 ||
-		len(s.config.Password) == 0 {
-		return nil, errors.New("not all configuration variables set required by InfluxAsyncSink")
+	if len(s.config.Port) == 0 {
+		return nil, errors.New("Missing port configuration required by InfluxSink")
+	}
+	if len(s.config.Database) == 0 {
+		return nil, errors.New("Missing database configuration required by InfluxSink")
+	}
+	if len(s.config.Organization) == 0 {
+		return nil, errors.New("Missing organization configuration required by InfluxSink")
+	}
+	if len(s.config.Password) == 0 {
+		return nil, errors.New("Missing password configuration required by InfluxSink")
 	}
 	// Create lookup map to use meta infos as tags in the output metric
 	s.meta_as_tags = make(map[string]bool)
@@ -168,6 +213,15 @@ func NewInfluxAsyncSink(name string, config json.RawMessage) (Sink, error) {
 	s.influxRetryInterval = toUint(s.config.InfluxRetryInterval, s.influxRetryInterval)
 	s.influxMaxRetryTime = toUint(s.config.InfluxMaxRetryTime, s.influxMaxRetryTime)

+	// Use a own timer for calling Flush()
+	if len(s.config.CustomFlushInterval) > 0 {
+		t, err := time.ParseDuration(s.config.CustomFlushInterval)
+		if err != nil {
+			return nil, fmt.Errorf("invalid duration in 'custom_flush_interval': %v", err)
+		}
+		s.customFlushInterval = t
+	}
+
 	// Connect to InfluxDB server
 	if err := s.connect(); err != nil {
 		return nil, fmt.Errorf("unable to connect: %v", err)
--- a/sinks/influxSink.go
+++ b/sinks/influxSink.go
@@ -6,69 +6,81 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"sync"
 	"time"

 	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
 	influxdb2Api "github.com/influxdata/influxdb-client-go/v2/api"
+	"github.com/influxdata/influxdb-client-go/v2/api/write"
 )

-type InfluxSinkConfig struct {
-	defaultSinkConfig
-	Host                  string `json:"host,omitempty"`
-	Port                  string `json:"port,omitempty"`
-	Database              string `json:"database,omitempty"`
-	User                  string `json:"user,omitempty"`
-	Password              string `json:"password,omitempty"`
-	Organization          string `json:"organization,omitempty"`
-	SSL                   bool   `json:"ssl,omitempty"`
-	RetentionPol          string `json:"retention_policy,omitempty"`
-	InfluxRetryInterval   string `json:"retry_interval"`
-	InfluxExponentialBase uint   `json:"retry_exponential_base"`
-	InfluxMaxRetries      uint   `json:"max_retries"`
-	InfluxMaxRetryTime    string `json:"max_retry_time"`
-	//InfluxMaxRetryDelay  string `json:"max_retry_delay"` // It is mentioned in the docs but there is no way to set it
-}
-
 type InfluxSink struct {
 	sink
-	client              influxdb2.Client
-	writeApi            influxdb2Api.WriteAPIBlocking
-	config              InfluxSinkConfig
-	influxRetryInterval uint
-	influxMaxRetryTime  uint
-	//influxMaxRetryDelay uint
+	client   influxdb2.Client
+	writeApi influxdb2Api.WriteAPIBlocking
+	config   struct {
+		defaultSinkConfig
+		Host         string `json:"host,omitempty"`
+		Port         string `json:"port,omitempty"`
+		Database     string `json:"database,omitempty"`
+		User         string `json:"user,omitempty"`
+		Password     string `json:"password,omitempty"`
+		Organization string `json:"organization,omitempty"`
+		SSL          bool   `json:"ssl,omitempty"`
+		// Maximum number of points sent to server in single request. Default 100
+		BatchSize int `json:"batch_size,omitempty"`
+		// Interval, in which is buffer flushed if it has not been already written (by reaching batch size). Default 1s
+		FlushInterval string `json:"flush_delay,omitempty"`
+	}
+	batch      []*write.Point
+	flushTimer *time.Timer
+	flushDelay time.Duration
+	lock       sync.Mutex // Flush() runs in another goroutine, so this lock has to protect the buffer
 }

+// connect connects to the InfluxDB server
 func (s *InfluxSink) connect() error {
-	var auth string
+
+	// URI options:
+	// * http://host:port
+	// * https://host:port
 	var uri string
 	if s.config.SSL {
 		uri = fmt.Sprintf("https://%s:%s", s.config.Host, s.config.Port)
 	} else {
 		uri = fmt.Sprintf("http://%s:%s", s.config.Host, s.config.Port)
 	}
+
+	// Authentication options:
+	// * token
+	// * username:password
+	var auth string
 	if len(s.config.User) == 0 {
 		auth = s.config.Password
 	} else {
 		auth = fmt.Sprintf("%s:%s", s.config.User, s.config.Password)
 	}
 	cclog.ComponentDebug(s.name, "Using URI", uri, "Org", s.config.Organization, "Bucket", s.config.Database)
+
+	// Set influxDB client options
 	clientOptions := influxdb2.DefaultOptions()
+
+	// Do not check InfluxDB certificate
 	clientOptions.SetTLSConfig(
 		&tls.Config{
 			InsecureSkipVerify: true,
 		},
 	)

-	clientOptions.SetMaxRetryInterval(s.influxRetryInterval)
-	clientOptions.SetMaxRetryTime(s.influxMaxRetryTime)
-	clientOptions.SetExponentialBase(s.config.InfluxExponentialBase)
-	clientOptions.SetMaxRetries(s.config.InfluxMaxRetries)
+	clientOptions.SetPrecision(time.Second)

+	// Create new writeAPI
 	s.client = influxdb2.NewClientWithOptions(uri, auth, clientOptions)
 	s.writeApi = s.client.WriteAPIBlocking(s.config.Organization, s.config.Database)
+
+	// Check InfluxDB server accessibility
 	ok, err := s.client.Ping(context.Background())
 	if err != nil {
 		return err
@@ -80,61 +92,126 @@ func (s *InfluxSink) connect() error {
 }

 func (s *InfluxSink) Write(m lp.CCMetric) error {
-	err :=
-		s.writeApi.WritePoint(
-			context.Background(),
-			m.ToPoint(s.meta_as_tags),
-		)
-	return err
+
+	if len(s.batch) == 0 && s.flushDelay != 0 {
+		// This is the first write since the last flush, start the flushTimer!
+		if s.flushTimer != nil && s.flushTimer.Stop() {
+			cclog.ComponentDebug(s.name, "unexpected: the flushTimer was already running?")
+		}
+
+		// Run a batched flush for all lines that have arrived in the last flush delay interval
+		s.flushTimer = time.AfterFunc(
+			s.flushDelay,
+			func() {
+				if err := s.Flush(); err != nil {
+					cclog.ComponentError(s.name, "flush failed:", err.Error())
+				}
+			})
+	}
+
+	// Append metric to batch slice
+	p := m.ToPoint(s.meta_as_tags)
+	s.lock.Lock()
+	s.batch = append(s.batch, p)
+	s.lock.Unlock()
+
+	// Flush synchronously if "flush_delay" is zero
+	if s.flushDelay == 0 {
+		return s.Flush()
+	}
+
+	// Flush if batch size is reached
+	if len(s.batch) == s.config.BatchSize {
+		return s.Flush()
+	}
+
+	return nil
 }

+// Flush sends all metrics buffered in batch slice to InfluxDB server
 func (s *InfluxSink) Flush() error {
+
+	// Lock access to batch slice
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	// Nothing to do, batch slice is empty
+	if len(s.batch) == 0 {
+		return nil
+	}
+
+	// Send metrics from batch slice
+	err := s.writeApi.WritePoint(context.Background(), s.batch...)
+	if err != nil {
+		cclog.ComponentError(s.name, "flush failed:", err.Error())
+		return err
+	}
+
+	// Clear batch slice
+	for i := range s.batch {
+		s.batch[i] = nil
+	}
+	s.batch = s.batch[:0]
+
 	return nil
 }

 func (s *InfluxSink) Close() {
 	cclog.ComponentDebug(s.name, "Closing InfluxDB connection")
+	s.flushTimer.Stop()
+	s.Flush()
 	s.client.Close()
 }

+// NewInfluxSink create a new InfluxDB sink
 func NewInfluxSink(name string, config json.RawMessage) (Sink, error) {
 	s := new(InfluxSink)
 	s.name = fmt.Sprintf("InfluxSink(%s)", name)
+
+	// Set config default values
+	s.config.BatchSize = 100
+	s.config.FlushInterval = "1s"
+
+	// Read config
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &s.config)
 		if err != nil {
 			return nil, err
 		}
 	}
-	s.influxRetryInterval = uint(time.Duration(1) * time.Second)
-	s.config.InfluxRetryInterval = "1s"
-	s.influxMaxRetryTime = uint(7 * time.Duration(24) * time.Hour)
-	s.config.InfluxMaxRetryTime = "168h"
-	s.config.InfluxMaxRetries = 20
-	s.config.InfluxExponentialBase = 2

-	if len(s.config.Host) == 0 ||
-		len(s.config.Port) == 0 ||
-		len(s.config.Database) == 0 ||
-		len(s.config.Organization) == 0 ||
-		len(s.config.Password) == 0 {
-		return nil, errors.New("not all configuration variables set required by InfluxSink")
+	if len(s.config.Host) == 0 {
+		return nil, errors.New("Missing host configuration required by InfluxSink")
 	}
+	if len(s.config.Port) == 0 {
+		return nil, errors.New("Missing port configuration required by InfluxSink")
+	}
+	if len(s.config.Database) == 0 {
+		return nil, errors.New("Missing database configuration required by InfluxSink")
+	}
+	if len(s.config.Organization) == 0 {
+		return nil, errors.New("Missing organization configuration required by InfluxSink")
+	}
+	if len(s.config.Password) == 0 {
+		return nil, errors.New("Missing password configuration required by InfluxSink")
+	}
+
 	// Create lookup map to use meta infos as tags in the output metric
 	s.meta_as_tags = make(map[string]bool)
 	for _, k := range s.config.MetaAsTags {
 		s.meta_as_tags[k] = true
 	}

-	toUint := func(duration string, def uint) uint {
-		t, err := time.ParseDuration(duration)
+	// Configure flush delay duration
+	if len(s.config.FlushInterval) > 0 {
+		t, err := time.ParseDuration(s.config.FlushInterval)
 		if err == nil {
-			return uint(t.Milliseconds())
+			s.flushDelay = t
 		}
-		return def
 	}
-	s.influxRetryInterval = toUint(s.config.InfluxRetryInterval, s.influxRetryInterval)
-	s.influxMaxRetryTime = toUint(s.config.InfluxMaxRetryTime, s.influxMaxRetryTime)
+
+	// allocate batch slice
+	s.batch = make([]*write.Point, 0, s.config.BatchSize)

 	// Connect to InfluxDB server
 	if err := s.connect(); err != nil {
--- a/sinks/influxSink.md
+++ b/sinks/influxSink.md
@@ -17,10 +17,8 @@ The `influxdb` sink uses the official [InfluxDB golang client](https://pkg.go.de
    "password" : "examplepw",
    "organization": "myorg",
    "ssl": true,
-    "retry_interval" : "1s",
-    "retry_exponential_base" : 2,
-    "max_retries": 20,
-    "max_retry_time" : "168h"
+    "flush_delay" : "1s",
+    "batch_size" : 100
  }
 }
 ```
@@ -34,9 +32,6 @@ The `influxdb` sink uses the official [InfluxDB golang client](https://pkg.go.de
 - `password`: Password for basic authentification
 - `organization`: Organization in the InfluxDB
 - `ssl`: Use SSL connection
- `retry_interval`: Base retry interval for failed write requests, default 1s
- `retry_exponential_base`: The retry interval is exponentially increased with this base, default 2
- `max_retries`: Maximal number of retry attempts
- `max_retry_time`: Maximal time to retry failed writes, default 168h (one week)
+- `flush_delay`: Group metrics coming in to a single batch
+- `batch_size`: Maximal batch size

-For information about the calculation of the retry interval settings, see [offical influxdb-client-go documentation](https://github.com/influxdata/influxdb-client-go#handling-of-failed-async-writes)
--- a/sinks/natsSink.go
+++ b/sinks/natsSink.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"sync"
 	"time"

 	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
@@ -15,11 +16,12 @@ import (

 type NatsSinkConfig struct {
 	defaultSinkConfig
-	Host     string `json:"host,omitempty"`
-	Port     string `json:"port,omitempty"`
-	Database string `json:"database,omitempty"`
-	User     string `json:"user,omitempty"`
-	Password string `json:"password,omitempty"`
+	Host       string `json:"host,omitempty"`
+	Port       string `json:"port,omitempty"`
+	Subject    string `json:"subject,omitempty"`
+	User       string `json:"user,omitempty"`
+	Password   string `json:"password,omitempty"`
+	FlushDelay string `json:"flush_delay,omitempty"`
 }

 type NatsSink struct {
@@ -28,6 +30,10 @@ type NatsSink struct {
 	encoder *influx.Encoder
 	buffer  *bytes.Buffer
 	config  NatsSinkConfig
+
+	lock       sync.Mutex
+	flushDelay time.Duration
+	flushTimer *time.Timer
 }

 func (s *NatsSink) connect() error {
@@ -54,37 +60,53 @@ func (s *NatsSink) connect() error {
 }

 func (s *NatsSink) Write(m lp.CCMetric) error {
-	if s.client != nil {
-		_, err := s.encoder.Encode(m.ToPoint(s.meta_as_tags))
-		if err != nil {
-			cclog.ComponentError(s.name, "Write:", err.Error())
-			return err
-		}
+	s.lock.Lock()
+	_, err := s.encoder.Encode(m.ToPoint(s.meta_as_tags))
+	s.lock.Unlock()
+	if err != nil {
+		cclog.ComponentError(s.name, "Write:", err.Error())
+		return err
 	}
+
+	if s.flushDelay == 0 {
+		s.Flush()
+	} else if s.flushTimer == nil {
+		s.flushTimer = time.AfterFunc(s.flushDelay, func() {
+			s.Flush()
+		})
+	} else {
+		s.flushTimer.Reset(s.flushDelay)
+	}
+
 	return nil
 }

 func (s *NatsSink) Flush() error {
-	if s.client != nil {
-		if err := s.client.Publish(s.config.Database, s.buffer.Bytes()); err != nil {
-			cclog.ComponentError(s.name, "Flush:", err.Error())
-			return err
-		}
-		s.buffer.Reset()
+	s.lock.Lock()
+	buf := append([]byte{}, s.buffer.Bytes()...) // copy bytes
+	s.buffer.Reset()
+	s.lock.Unlock()
+
+	if len(buf) == 0 {
+		return nil
+	}
+
+	if err := s.client.Publish(s.config.Subject, buf); err != nil {
+		cclog.ComponentError(s.name, "Flush:", err.Error())
+		return err
 	}
 	return nil
 }

 func (s *NatsSink) Close() {
-	if s.client != nil {
-		cclog.ComponentDebug(s.name, "Close")
-		s.client.Close()
-	}
+	cclog.ComponentDebug(s.name, "Close")
+	s.client.Close()
 }

 func NewNatsSink(name string, config json.RawMessage) (Sink, error) {
 	s := new(NatsSink)
 	s.name = fmt.Sprintf("NatsSink(%s)", name)
+	s.flushDelay = 10 * time.Second
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &s.config)
 		if err != nil {
@@ -94,7 +116,7 @@ func NewNatsSink(name string, config json.RawMessage) (Sink, error) {
 	}
 	if len(s.config.Host) == 0 ||
 		len(s.config.Port) == 0 ||
-		len(s.config.Database) == 0 {
+		len(s.config.Subject) == 0 {
 		return nil, errors.New("not all configuration variables set required by NatsSink")
 	}
 	// Create lookup map to use meta infos as tags in the output metric
@@ -112,5 +134,15 @@ func NewNatsSink(name string, config json.RawMessage) (Sink, error) {
 	if err := s.connect(); err != nil {
 		return nil, fmt.Errorf("unable to connect: %v", err)
 	}
+
+	s.flushTimer = nil
+	if len(s.config.FlushDelay) != 0 {
+		var err error
+		s.flushDelay, err = time.ParseDuration(s.config.FlushDelay)
+		if err != nil {
+			return nil, err
+		}
+	}
+
 	return s, nil
 }
Author	SHA1	Message	Date
Thomas Roehl	31a38bc17d	Update release action	2022-06-09 14:36:25 +02:00
Thomas Roehl	dbdec1eab8	Merge branch 'main' of github.com:ClusterCockpit/cc-metric-collector into main	2022-06-09 12:46:47 +02:00
Thomas Gruber	0d31ec481b	Update Release.yml	2022-06-09 12:42:11 +02:00
Thomas Roehl	e22c3287e9	Merge branch 'main' of github.com:ClusterCockpit/cc-metric-collector into main	2022-06-08 15:26:05 +02:00
Thomas Gruber	8d85bd53f1	Merge latest development changes to main branch (#79 ) * Cleanup: Remove unused code * Use Golang duration parser for 'interval' and 'duration' in main config * Update handling of LIKWID headers. Download only if not already present in the system. Fixes #73 * Units with cc-units (#64) * Add option to normalize units with cc-unit * Add unit conversion to router * Add option to change unit prefix in the router * Add to MetricRouter README * Add order of operations in router to README * Use second add_tags/del_tags only if metric gets renamed * Skip disks in DiskstatCollector that have size=0 * Check readability of sensor files in TempCollector * Fix for --once option * Rename `cpu` type to `hwthread` (#69) * Rename 'cpu' type to 'hwthread' to avoid naming clashes with MetricStore and CC-Webfrontend * Collectors in parallel (#74) * Provide info to CollectorManager whether the collector can be executed in parallel with others * Split serial and parallel collectors. Read in parallel first * Update NvidiaCollector with new metrics, MIG and NvLink support (#75) * CC topology module update (#76) * Rename CPU to hardware thread, write some comments * Do renaming in other parts * Remove CpuList and SocketList function from metricCollector. Available in ccTopology * Option to use MIG UUID as subtype-id in NvidiaCollector * Option to use MIG slice name as subtype-id in NvidiaCollector * MetricRouter: Fix JSON in README * Fix for Github Action to really use the selected version * Remove Ganglia installation in runonce Action and add Go 1.18 * Fix daemon options in init script * Add separate go.mod files to use it with deprecated 1.16 * Minor updates for Makefiles * fix string comparison * AMD ROCm SMI collector (#77) * Add collector for AMD ROCm SMI metrics * Fix import path * Fix imports * Remove Board Number * store GPU index explicitly * Remove board number from description * Use http instead of ftp to download likwid * Fix serial number in rocmCollector * Improved http sink (#78) * automatic flush in NatsSink * tweak default options of HttpSink * shorter cirt. section and retries for HttpSink * fix error handling * Remove file added by mistake. * Use http instead of ftp to download likwid * Fix serial number in rocmCollector Co-authored-by: Thomas Roehl <thomas.roehl@fau.de> Co-authored-by: Holger Obermaier <40787752+ho-ob@users.noreply.github.com> Co-authored-by: Lou <lou.knauer@gmx.de>	2022-06-08 15:25:40 +02:00
Holger Obermaier	186a62a86b	Fix: influx sink ignores config batch_size. Feature: Add Redfish receiver	2022-05-04 13:00:56 +02:00
Holger Obermaier	e098c33179	Add some golang debug options	2022-05-04 12:48:46 +02:00
Thomas Roehl	38d4e0a730	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-05-04 11:54:55 +02:00
Thomas Roehl	54d14519ca	Skip mount points in DiskstatCollector if statfs() call does not work (bind mounts, ...)	2022-05-04 11:54:34 +02:00
Holger Obermaier	c35ac9dba8	Flush if batch size is reached	2022-05-04 11:28:06 +02:00
Holger Obermaier	c019f8e7ad	Reuse tags and meta data tags	2022-05-03 17:55:33 +02:00
Holger Obermaier	fb6f6a4daa	Fix GPFS collector last state handling	2022-05-02 16:57:19 +02:00
Holger Obermaier	9d6d0dbd93	Delete empty tags and meta data tags	2022-04-20 14:39:26 +02:00
Holger Obermaier	c2d4272fdf	Clear workerInput channel after done event	2022-04-20 12:36:45 +02:00
Holger Obermaier	8c73095548	Allow to shutdown redfish receiver during metric read	2022-04-20 09:58:02 +02:00
Holger Obermaier	31c5c89a5a	Fix: Close done channel	2022-04-19 14:01:23 +02:00
Holger Obermaier	bf9c7e1830	Update requirements	2022-04-19 12:15:51 +02:00
Holger Obermaier	48d34bf564	Adopt sinks.json for new meta_as_tags usage	2022-04-19 12:06:53 +02:00
Holger Obermaier	a1d85fa886	Add redfish receiver	2022-04-19 12:05:03 +02:00
Holger Obermaier	96ee16398e	Removed unused done channel and wg wait group	2022-04-19 11:53:11 +02:00
Holger Obermaier	e7b8088c41	Extended go routine use case in sample receiver	2022-04-19 11:42:46 +02:00
Thomas Roehl	017cd58247	Updating page for LikwidCollector	2022-04-05 10:57:09 +02:00
Thomas Roehl	36dd440864	Merge branch 'develop' into main	2022-04-04 15:16:33 +02:00
Thomas Roehl	7b098e0b1b	Fix for missing metrics in LikwidCollector is hwthread is inactive	2022-04-04 15:16:11 +02:00
Thomas Roehl	229a57b16a	Merge branch 'develop' into main	2022-04-04 11:49:33 +02:00
Thomas Roehl	70a9530aba	Set WriteFailedCallback to get some error message	2022-04-04 11:48:54 +02:00
Thomas Roehl	2f0b6057ca	Merge branch 'develop' into main - MetricRouter: Fix interval_timestamp option - InfluxSink & InfluxAsyncSink: Add own flush mechanism - InfluxSink & InfluxAsyncSink: Use default options, overwrite if configured otherwise - InfinibandCollector: Add units to metrics - LikwidCollector: Fix for dying accessdaemon	2022-04-04 02:59:42 +02:00
Thomas Roehl	69f7c19659	InfluxAsyncSink: Add custom flush mechanism	2022-04-04 02:56:23 +02:00
Thomas Roehl	ecdb4c1bcf	Add debug message when updating interval_timestep	2022-04-04 02:55:44 +02:00
Thomas Roehl	4d5b1adbc8	Fix for interval_timestamp option	2022-04-04 02:26:04 +02:00
Thomas Roehl	28348bd108	InfluxSink: Use batch&flush logic from HttpSink	2022-04-01 18:37:45 +02:00
Thomas Roehl	a3b9d8a90b	HttpSink: Use sink name in error outputs	2022-04-01 18:36:54 +02:00
Thomas Roehl	7e43e9171e	Use default options. Overwrite if anything is configured differently. Use seconds as precision	2022-04-01 17:26:56 +02:00
Thomas Roehl	5d25a7bf12	Add units to InfiniBandCollector	2022-04-01 17:14:26 +02:00
Thomas Roehl	83b4343310	Likwid receives signal at first Read, check when re-initializing	2022-04-01 17:10:31 +02:00
Thomas Roehl	f1d3cabdc6	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-04-01 12:45:25 +02:00
Thomas Roehl	43bcce6fb5	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-03-22 18:05:38 +01:00
Thomas Roehl	beebcd7145	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-03-15 16:16:39 +01:00
Thomas Roehl	082eea525a	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-03-15 16:10:41 +01:00
Thomas Roehl	2b8266d1d2	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-03-15 15:24:29 +01:00
Thomas Roehl	d835724d93	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-03-09 17:02:58 +01:00
Thomas Roehl	c5082bbffe	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-03-07 16:13:08 +01:00
Thomas Roehl	4c1263312b	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-02-25 15:06:06 +01:00
Thomas Roehl	940623585c	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-02-25 13:53:34 +01:00
Thomas Roehl	87ecb12c6f	Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop	2022-02-24 18:28:52 +01:00
Thomas Roehl	ae64eddcc8	Remove doubled import	2022-02-21 14:50:53 +01:00