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stats.go
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stats.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 (
"github.com/livekit/livekit-server/pkg/telemetry/prometheus"
"github.com/livekit/protocol/livekit"
)
type StatsKey struct {
streamType livekit.StreamType
participantID livekit.ParticipantID
trackID livekit.TrackID
trackSource livekit.TrackSource
trackType livekit.TrackType
track bool
}
func StatsKeyForTrack(streamType livekit.StreamType, participantID livekit.ParticipantID, trackID livekit.TrackID, trackSource livekit.TrackSource, trackType livekit.TrackType) StatsKey {
return StatsKey{
streamType: streamType,
participantID: participantID,
trackID: trackID,
trackSource: trackSource,
trackType: trackType,
track: true,
}
}
func StatsKeyForData(streamType livekit.StreamType, participantID livekit.ParticipantID, trackID livekit.TrackID) StatsKey {
return StatsKey{
streamType: streamType,
participantID: participantID,
trackID: trackID,
}
}
func (t *telemetryService) TrackStats(key StatsKey, stat *livekit.AnalyticsStat) {
t.enqueue(func() {
direction := prometheus.Incoming
if key.streamType == livekit.StreamType_DOWNSTREAM {
direction = prometheus.Outgoing
}
nacks := uint32(0)
plis := uint32(0)
firs := uint32(0)
packets := uint32(0)
bytes := uint64(0)
retransmitBytes := uint64(0)
retransmitPackets := uint32(0)
for _, stream := range stat.Streams {
nacks += stream.Nacks
plis += stream.Plis
firs += stream.Firs
packets += stream.PrimaryPackets + stream.PaddingPackets
bytes += stream.PrimaryBytes + stream.PaddingBytes
if key.streamType == livekit.StreamType_DOWNSTREAM {
retransmitPackets += stream.RetransmitPackets
retransmitBytes += stream.RetransmitBytes
} else {
// for upstream, we don't account for these separately for now
packets += stream.RetransmitPackets
bytes += stream.RetransmitBytes
}
if key.track {
prometheus.RecordPacketLoss(direction, key.trackSource, key.trackType, stream.PacketsLost, stream.PrimaryPackets+stream.PaddingPackets)
prometheus.RecordRTT(direction, key.trackSource, key.trackType, stream.Rtt)
prometheus.RecordJitter(direction, key.trackSource, key.trackType, stream.Jitter)
}
}
prometheus.IncrementRTCP(direction, nacks, plis, firs)
prometheus.IncrementPackets(direction, uint64(packets), false)
prometheus.IncrementBytes(direction, bytes, false)
if retransmitPackets != 0 {
prometheus.IncrementPackets(direction, uint64(retransmitPackets), true)
}
if retransmitBytes != 0 {
prometheus.IncrementBytes(direction, retransmitBytes, true)
}
if worker, ok := t.getWorker(key.participantID); ok {
worker.OnTrackStat(key.trackID, key.streamType, stat)
}
})
}