mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-09-20 07:27:25 +02:00
152 lines
3.2 KiB
Go
152 lines
3.2 KiB
Go
package collectors
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
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lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
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)
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// Non-Uniform Memory Access (NUMA) policy hit/miss statistics
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//
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// numa_hit:
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//
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// A process wanted to allocate memory from this node, and succeeded.
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//
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// numa_miss:
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//
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// A process wanted to allocate memory from another node,
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// but ended up with memory from this node.
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//
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// numa_foreign:
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//
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// A process wanted to allocate on this node,
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// but ended up with memory from another node.
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//
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// local_node:
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//
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// A process ran on this node's CPU,
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// and got memory from this node.
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//
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// other_node:
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//
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// A process ran on a different node's CPU
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// and got memory from this node.
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//
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// interleave_hit:
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//
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// Interleaving wanted to allocate from this node
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// and succeeded.
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//
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// See: https://www.kernel.org/doc/html/latest/admin-guide/numastat.html
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type NUMAStatsCollectorTopolgy struct {
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file string
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tagSet map[string]string
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}
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type NUMAStatsCollector struct {
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metricCollector
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topology []NUMAStatsCollectorTopolgy
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}
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func (m *NUMAStatsCollector) Init(config json.RawMessage) error {
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// Check if already initialized
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if m.init {
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return nil
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}
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m.name = "NUMAStatsCollector"
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m.parallel = true
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m.setup()
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m.meta = map[string]string{
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"source": m.name,
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"group": "NUMA",
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}
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// Loop for all NUMA node directories
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base := "/sys/devices/system/node/node"
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globPattern := base + "[0-9]*"
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dirs, err := filepath.Glob(globPattern)
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if err != nil {
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return fmt.Errorf("unable to glob files with pattern '%s'", globPattern)
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}
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if dirs == nil {
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return fmt.Errorf("unable to find any files with pattern '%s'", globPattern)
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}
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m.topology = make([]NUMAStatsCollectorTopolgy, 0, len(dirs))
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for _, dir := range dirs {
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node := strings.TrimPrefix(dir, base)
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file := filepath.Join(dir, "numastat")
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m.topology = append(m.topology,
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NUMAStatsCollectorTopolgy{
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file: file,
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tagSet: map[string]string{"memoryDomain": node},
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})
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}
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// Initialized
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cclog.ComponentDebug(m.name, "initialized", len(m.topology), "NUMA domains")
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m.init = true
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return nil
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}
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func (m *NUMAStatsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
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if !m.init {
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return
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}
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for i := range m.topology {
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// Loop for all NUMA domains
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t := &m.topology[i]
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now := time.Now()
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file, err := os.Open(t.file)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to open file '%s': %v", t.file, err))
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return
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}
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scanner := bufio.NewScanner(file)
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// Read line by line
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for scanner.Scan() {
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split := strings.Fields(scanner.Text())
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if len(split) != 2 {
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continue
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}
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key := split[0]
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value, err := strconv.ParseInt(split[1], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert %s='%s' to int64: %v", key, split[1], err))
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continue
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}
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y, err := lp.New(
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"numastats_"+key,
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t.tagSet,
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m.meta,
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map[string]interface{}{"value": value},
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now,
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)
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if err == nil {
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output <- y
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}
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}
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file.Close()
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}
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}
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func (m *NUMAStatsCollector) Close() {
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m.init = false
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}
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