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103 lines
3.1 KiB
Go
103 lines
3.1 KiB
Go
package lock
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import (
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"sync"
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"time"
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"github.com/cockroachdb/errors"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/metrics"
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"github.com/milvus-io/milvus/pkg/util/paramtable"
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"go.uber.org/zap"
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)
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type MetricsLockManager struct {
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rwLocks map[string]*MetricsRWMutex
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}
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type MetricsRWMutex struct {
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mutex sync.RWMutex
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lockName string
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acquireTimeMap map[string]time.Time
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}
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const (
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readLock = "READ_LOCK"
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writeLock = "WRITE_LOCK"
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hold = "HOLD"
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acquire = "ACQUIRE"
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)
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func (mRWLock *MetricsRWMutex) RLock(source string) {
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if paramtable.Get().CommonCfg.EnableLockMetrics.GetAsBool() {
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before := time.Now()
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mRWLock.mutex.RLock()
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mRWLock.acquireTimeMap[source] = time.Now()
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logLock(time.Since(before), mRWLock.lockName, source, readLock, acquire)
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} else {
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mRWLock.mutex.RLock()
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}
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}
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func (mRWLock *MetricsRWMutex) Lock(source string) {
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if paramtable.Get().CommonCfg.EnableLockMetrics.GetAsBool() {
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before := time.Now()
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mRWLock.mutex.Lock()
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mRWLock.acquireTimeMap[source] = time.Now()
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logLock(time.Since(before), mRWLock.lockName, source, writeLock, acquire)
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} else {
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mRWLock.mutex.Lock()
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}
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}
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func (mRWLock *MetricsRWMutex) UnLock(source string) {
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if mRWLock.maybeLogUnlockDuration(source, writeLock) != nil {
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return
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}
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mRWLock.mutex.Unlock()
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}
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func (mRWLock *MetricsRWMutex) RUnLock(source string) {
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if mRWLock.maybeLogUnlockDuration(source, readLock) != nil {
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return
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}
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mRWLock.mutex.RUnlock()
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}
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func (mRWLock *MetricsRWMutex) maybeLogUnlockDuration(source string, lockType string) error {
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if paramtable.Get().CommonCfg.EnableLockMetrics.GetAsBool() {
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acquireTime, ok := mRWLock.acquireTimeMap[source]
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if ok {
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logLock(time.Since(acquireTime), mRWLock.lockName, source, lockType, hold)
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delete(mRWLock.acquireTimeMap, source)
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} else {
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log.Error("there's no lock history for the source, there may be some defects in codes",
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zap.String("source", source))
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return errors.New("unknown source")
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}
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}
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return nil
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}
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func logLock(duration time.Duration, lockName string, source string, lockType string, opType string) {
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if duration >= paramtable.Get().CommonCfg.LockSlowLogWarnThreshold.GetAsDuration(time.Millisecond) {
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log.Warn("lock takes too long", zap.String("lockName", lockName), zap.String("lockType", lockType),
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zap.String("source", source), zap.String("opType", opType),
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zap.Duration("time_cost", duration))
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} else if duration >= paramtable.Get().CommonCfg.LockSlowLogInfoThreshold.GetAsDuration(time.Millisecond) {
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log.Info("lock takes too long", zap.String("lockName", lockName), zap.String("lockType", lockType),
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zap.String("source", source), zap.String("opType", opType),
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zap.Duration("time_cost", duration))
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}
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metrics.LockCosts.WithLabelValues(lockName, source, lockType, opType).Set(float64(duration.Milliseconds()))
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}
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// currently, we keep metricsLockManager as a communal gate for metrics lock
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// we may use this manager as a centralized statistical site to provide overall cost for locks
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func (mlManager *MetricsLockManager) applyRWLock(name string) *MetricsRWMutex {
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return &MetricsRWMutex{
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lockName: name,
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acquireTimeMap: make(map[string]time.Time, 0),
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}
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}
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