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* Add forward metrics * ignore packets was not forwarded * rename
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| package sfu | ||
|
|
||
| import ( | ||
| "sync" | ||
| "sync/atomic" | ||
| "time" | ||
|
|
||
| "github.com/livekit/livekit-server/pkg/telemetry/prometheus" | ||
| "github.com/livekit/protocol/utils" | ||
| ) | ||
|
|
||
| type ForwardStats struct { | ||
| lock sync.Mutex | ||
| lastLeftMs atomic.Int64 | ||
| latency *utils.LatencyAggregate | ||
| closeCh chan struct{} | ||
| } | ||
|
|
||
| func NewForwardStats(latencyUpdateInterval, reportInterval, latencyWindowLength time.Duration) *ForwardStats { | ||
| s := &ForwardStats{ | ||
| latency: utils.NewLatencyAggregate(latencyUpdateInterval, latencyWindowLength), | ||
| closeCh: make(chan struct{}), | ||
| } | ||
|
|
||
| go s.report(reportInterval) | ||
| return s | ||
| } | ||
|
|
||
| func (s *ForwardStats) Update(arrival, left time.Time) { | ||
| leftMs := left.UnixMilli() | ||
| lastMs := s.lastLeftMs.Load() | ||
| if leftMs < lastMs || !s.lastLeftMs.CompareAndSwap(lastMs, leftMs) { | ||
| return | ||
| } | ||
|
|
||
| transit := left.Sub(arrival) | ||
| s.lock.Lock() | ||
| defer s.lock.Unlock() | ||
| s.latency.Update(time.Duration(arrival.UnixNano()), float64(transit)) | ||
| } | ||
|
|
||
| func (s *ForwardStats) GetStats() (latency, jitter time.Duration) { | ||
| s.lock.Lock() | ||
| defer s.lock.Unlock() | ||
| w := s.latency.Summarize() | ||
| return time.Duration(w.Mean()), time.Duration(w.StdDev()) | ||
| } | ||
|
|
||
| func (s *ForwardStats) GetLastStats(duration time.Duration) (latency, jitter time.Duration) { | ||
| s.lock.Lock() | ||
| defer s.lock.Unlock() | ||
| w := s.latency.SummarizeLast(duration) | ||
| return time.Duration(w.Mean()), time.Duration(w.StdDev()) | ||
| } | ||
|
|
||
| func (s *ForwardStats) Stop() { | ||
| close(s.closeCh) | ||
| } | ||
|
|
||
| func (s *ForwardStats) report(reportInterval time.Duration) { | ||
| ticker := time.NewTicker(reportInterval) | ||
| defer ticker.Stop() | ||
| for { | ||
| select { | ||
| case <-s.closeCh: | ||
| return | ||
| case <-ticker.C: | ||
| latency, jitter := s.GetLastStats(reportInterval) | ||
| latencySlow, jitterSlow := s.GetStats() | ||
| prometheus.RecordForwardJitter(uint32(jitter/time.Millisecond), uint32(jitterSlow/time.Millisecond)) | ||
| prometheus.RecordForwardLatency(uint32(latency/time.Millisecond), uint32(latencySlow/time.Millisecond)) | ||
| } | ||
| } | ||
| } |
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