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signalanddatastats.go
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signalanddatastats.go
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// Copyright 2023 LiveKit, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package telemetry
import (
"context"
"fmt"
"sync"
"time"
"github.com/frostbyte73/core"
"go.uber.org/atomic"
"github.com/livekit/livekit-server/pkg/config"
"github.com/livekit/protocol/livekit"
"github.com/livekit/protocol/utils"
)
type BytesTrackType string
const (
BytesTrackTypeData BytesTrackType = "DT"
BytesTrackTypeSignal BytesTrackType = "SG"
)
// -------------------------------
type TrafficTotals struct {
At time.Time
SendBytes uint64
SendMessages uint32
RecvBytes uint64
RecvMessages uint32
}
// --------------------------------
// stats for signal and data channel
type BytesTrackStats struct {
trackID livekit.TrackID
pID livekit.ParticipantID
send, recv atomic.Uint64
sendMessages, recvMessages atomic.Uint32
totalSendBytes, totalRecvBytes atomic.Uint64
totalSendMessages, totalRecvMessages atomic.Uint32
telemetry TelemetryService
done core.Fuse
}
func NewBytesTrackStats(trackID livekit.TrackID, pID livekit.ParticipantID, telemetry TelemetryService) *BytesTrackStats {
s := &BytesTrackStats{
trackID: trackID,
pID: pID,
telemetry: telemetry,
}
go s.reporter()
return s
}
func (s *BytesTrackStats) AddBytes(bytes uint64, isSend bool) {
if isSend {
s.send.Add(bytes)
s.sendMessages.Inc()
s.totalSendBytes.Add(bytes)
s.totalSendMessages.Inc()
} else {
s.recv.Add(bytes)
s.recvMessages.Inc()
s.totalRecvBytes.Add(bytes)
s.totalRecvMessages.Inc()
}
}
func (s *BytesTrackStats) GetTrafficTotals() *TrafficTotals {
return &TrafficTotals{
At: time.Now(),
SendBytes: s.totalSendBytes.Load(),
SendMessages: s.totalSendMessages.Load(),
RecvBytes: s.totalRecvBytes.Load(),
RecvMessages: s.totalRecvMessages.Load(),
}
}
func (s *BytesTrackStats) Stop() {
s.done.Break()
}
func (s *BytesTrackStats) report() {
if recv := s.recv.Swap(0); recv > 0 {
s.telemetry.TrackStats(StatsKeyForData(livekit.StreamType_UPSTREAM, s.pID, s.trackID), &livekit.AnalyticsStat{
Streams: []*livekit.AnalyticsStream{
{
PrimaryBytes: recv,
PrimaryPackets: s.recvMessages.Swap(0),
},
},
})
}
if send := s.send.Swap(0); send > 0 {
s.telemetry.TrackStats(StatsKeyForData(livekit.StreamType_DOWNSTREAM, s.pID, s.trackID), &livekit.AnalyticsStat{
Streams: []*livekit.AnalyticsStream{
{
PrimaryBytes: send,
PrimaryPackets: s.sendMessages.Swap(0),
},
},
})
}
}
func (s *BytesTrackStats) reporter() {
ticker := time.NewTicker(config.TelemetryNonMediaStatsUpdateInterval)
defer func() {
ticker.Stop()
s.report()
}()
for {
select {
case <-s.done.Watch():
return
case <-ticker.C:
s.report()
}
}
}
// -----------------------------------------------------------------------
type BytesSignalStats struct {
BytesTrackStats
ctx context.Context
mu sync.Mutex
ri *livekit.Room
pi *livekit.ParticipantInfo
}
func NewBytesSignalStats(ctx context.Context, telemetry TelemetryService) *BytesSignalStats {
return &BytesSignalStats{
BytesTrackStats: BytesTrackStats{
telemetry: telemetry,
},
ctx: ctx,
}
}
func (s *BytesSignalStats) ResolveRoom(ri *livekit.Room) {
s.mu.Lock()
defer s.mu.Unlock()
if s.ri == nil && ri.GetSid() != "" {
s.ri = &livekit.Room{
Sid: ri.Sid,
Name: ri.Name,
}
s.maybeStart()
}
}
func (s *BytesSignalStats) ResolveParticipant(pi *livekit.ParticipantInfo) {
s.mu.Lock()
defer s.mu.Unlock()
if s.pi == nil && pi != nil {
s.pi = &livekit.ParticipantInfo{
Sid: pi.Sid,
Identity: pi.Identity,
}
s.maybeStart()
}
}
func (s *BytesSignalStats) maybeStart() {
if s.ri == nil || s.pi == nil {
return
}
s.pID = livekit.ParticipantID(s.pi.Sid)
s.trackID = BytesTrackIDForParticipantID(BytesTrackTypeSignal, s.pID)
s.telemetry.ParticipantJoined(s.ctx, s.ri, s.pi, nil, nil, false)
go s.reporter()
}
func (s *BytesSignalStats) reporter() {
s.BytesTrackStats.reporter()
s.telemetry.ParticipantLeft(s.ctx, s.ri, s.pi, false)
}
// -----------------------------------------------------------------------
func BytesTrackIDForParticipantID(typ BytesTrackType, participantID livekit.ParticipantID) livekit.TrackID {
return livekit.TrackID(fmt.Sprintf("%s_%s%s", utils.TrackPrefix, string(typ), participantID))
}