ClusterCockpit/cc-metric-collector
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This commit is contained in:
Holger Obermaier 2023-09-12 11:28:57 +02:00
parent faad23ed64
commit 12130361fd
1 changed files with 26 additions and 7 deletions
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33
collectors/likwidMetric.go
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@ -365,6 +365,8 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
var ret C.int
var gid C.int = -1
sigchan := make(chan os.Signal, 1)
// Watch changes for the lock file ()
watcher, err := fsnotify.NewWatcher()
if err != nil {
cclog.ComponentError(m.name, err.Error())
@ -376,13 +378,13 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
if err != nil {
return true, err
}
stat := info.Sys().(*syscall.Stat_t)
if stat.Uid != uint32(os.Getuid()) {
usr, err := user.LookupId(strconv.FormatUint(uint64(stat.Uid), 10))
uid := info.Sys().(*syscall.Stat_t).Uid
if uid != uint32(os.Getuid()) {
usr, err := user.LookupId(fmt.Sprint(uid))
if err == nil {
return true, fmt.Errorf("Access to performance counters locked by %s", usr.Username)
} else {
return true, fmt.Errorf("Access to performance counters locked by %d", stat.Uid)
return true, fmt.Errorf("Access to performance counters locked by %d", uid)
}
}
err = watcher.Add(m.config.LockfilePath)
@ -392,6 +394,8 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
}
m.lock.Lock()
defer m.lock.Unlock()
// Initialize the performance monitoring feature by creating basic data structures
select {
case e := <-watcher.Events:
ret = -1
@ -406,6 +410,8 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
}
signal.Notify(sigchan, os.Interrupt)
signal.Notify(sigchan, syscall.SIGCHLD)
// Add an event string to LIKWID
select {
case <-sigchan:
gid = -1
@ -421,8 +427,9 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
return true, fmt.Errorf("failed to add events %s, error %d", evset.go_estr, gid)
} else {
evset.gid = gid
//m.likwidGroups[gid] = evset
}
// Setup all performance monitoring counters of an eventSet
select {
case <-sigchan:
ret = -1
@ -436,6 +443,8 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
if ret != 0 {
return true, fmt.Errorf("failed to setup events '%s', error %d", evset.go_estr, ret)
}
// Start counters
select {
case <-sigchan:
ret = -1
@ -462,7 +471,11 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
if ret != 0 {
return true, fmt.Errorf("failed to read events '%s', error %d", evset.go_estr, ret)
}
// Wait
time.Sleep(interval)
// Read counters
select {
case <-sigchan:
ret = -1
@ -476,6 +489,8 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
if ret != 0 {
return true, fmt.Errorf("failed to read events '%s', error %d", evset.go_estr, ret)
}
// Store counters
for eidx, counter := range evset.eorder {
gctr := C.GoString(counter)
for _, tid := range m.cpu2tid {
@ -487,9 +502,13 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
evset.results[tid][gctr] = fres
}
}
// Store time in seconds the event group was measured the last time
for _, tid := range m.cpu2tid {
evset.results[tid]["time"] = float64(C.perfmon_getLastTimeOfGroup(gid))
}
// Stop counters
select {
case <-sigchan:
ret = -1
@ -503,6 +522,8 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
if ret != 0 {
return true, fmt.Errorf("failed to stop events '%s', error %d", evset.go_estr, ret)
}
// Deallocates all internal data that is used during performance monitoring
signal.Stop(sigchan)
select {
case e := <-watcher.Events:
@ -774,8 +795,6 @@ func (m *LikwidCollector) ReadThread(interval time.Duration, output chan lp.CCMe
// main read function taking multiple measurement rounds, each 'interval' seconds long
func (m *LikwidCollector) Read(interval time.Duration, output chan lp.CCMetric) {
//var skip bool = false
//var err error
if !m.init {
return
}