ClusterCockpit/cc-metric-collector
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LIKWID collector: write log owner change only once

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This commit is contained in:
Thomas Roehl 2024-12-19 14:29:49 +01:00
parent 8270d93b67
commit 2f6f8c846a
1 changed files with 22 additions and 7 deletions
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29
collectors/likwidMetric.go
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@ -43,7 +43,7 @@ const (
type LikwidCollectorMetricConfig struct {
Name string `json:"name"` // Name of the metric
Calc string `json:"calc"` // Calculation for the metric using
Type string `json:"type"` // Metric type (aka node, socket, cpu, ...)
Type string `json:"type"` // Metric type (aka node, socket, hwthread, ...)
Publish bool `json:"publish"`
SendCoreTotalVal bool `json:"send_core_total_values,omitempty"`
SendSocketTotalVal bool `json:"send_socket_total_values,omitempty"`
@ -91,6 +91,8 @@ type LikwidCollector struct {
running bool
initialized bool
needs_reinit bool
myuid int
lock_err_once bool
likwidGroups map[C.int]LikwidEventsetConfig
lock sync.Mutex
measureThread thread.Thread
@ -204,6 +206,7 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
m.initialized = false
m.needs_reinit = true
m.running = false
m.myuid = os.Getuid()
m.config.AccessMode = LIKWID_DEF_ACCESSMODE
m.config.LibraryPath = LIKWID_LIB_NAME
m.config.LockfilePath = LIKWID_DEF_LOCKFILE
@ -390,14 +393,24 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
}
// Check file ownership
uid := info.Sys().(*syscall.Stat_t).Uid
if uid != uint32(os.Getuid()) {
if uid != uint32(m.myuid) {
usr, err := user.LookupId(fmt.Sprint(uid))
if err == nil {
return true, fmt.Errorf("access to performance counters locked by %s", usr.Username)
err = fmt.Errorf("access to performance counters locked by %s", usr.Username)
} else {
return true, fmt.Errorf("access to performance counters locked by %d", uid)
err = fmt.Errorf("access to performance counters locked by %d", uid)
}
// delete error if we already returned the error once.
if !m.lock_err_once {
m.lock_err_once = true
} else {
err = nil
}
return true, err
}
// reset lock_err_once
m.lock_err_once = false
// Add the lock file to the watcher
err = watcher.Add(m.config.LockfilePath)
if err != nil {
@ -798,11 +811,13 @@ func (m *LikwidCollector) ReadThread(interval time.Duration, output chan lp.CCMe
if !skip {
// read measurements and derive event set metrics
m.calcEventsetMetrics(e, interval, output)
groups = append(groups, e)
}
groups = append(groups, e)
}
// calculate global metrics
m.calcGlobalMetrics(groups, interval, output)
if len(groups) > 0 {
// calculate global metrics
m.calcGlobalMetrics(groups, interval, output)
}
}
// main read function taking multiple measurement rounds, each 'interval' seconds long