owncast/metrics/playback.go

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package metrics
import (
"math"
"time"
"github.com/owncast/owncast/core"
"github.com/owncast/owncast/utils"
)
// Playback error counts reported since the last time we collected metrics.
var (
windowedErrorCounts = map[string]float64{}
windowedQualityVariantChanges = map[string]float64{}
windowedBandwidths = map[string]float64{}
windowedLatencies = map[string]float64{}
windowedDownloadDurations = map[string]float64{}
)
func handlePlaybackPolling() {
metrics.m.Lock()
defer metrics.m.Unlock()
// Make sure this is fired first before all the values get cleared below.
if _getStatus().Online {
generateStreamHealthOverview()
}
collectPlaybackErrorCount()
collectLatencyValues()
collectSegmentDownloadDuration()
collectLowestBandwidth()
collectQualityVariantChanges()
}
// RegisterPlaybackErrorCount will add to the windowed playback error count.
func RegisterPlaybackErrorCount(clientID string, count float64) {
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metrics.m.Lock()
defer metrics.m.Unlock()
windowedErrorCounts[clientID] = count
// windowedErrorCounts = append(windowedErrorCounts, count)
}
// RegisterQualityVariantChangesCount will add to the windowed quality variant
// change count.
func RegisterQualityVariantChangesCount(clientID string, count float64) {
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metrics.m.Lock()
defer metrics.m.Unlock()
windowedQualityVariantChanges[clientID] = count
}
// RegisterPlayerBandwidth will add to the windowed playback bandwidth.
func RegisterPlayerBandwidth(clientID string, kbps float64) {
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metrics.m.Lock()
defer metrics.m.Unlock()
windowedBandwidths[clientID] = kbps
}
// RegisterPlayerLatency will add to the windowed player latency values.
func RegisterPlayerLatency(clientID string, seconds float64) {
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metrics.m.Lock()
defer metrics.m.Unlock()
windowedLatencies[clientID] = seconds
}
// RegisterPlayerSegmentDownloadDuration will add to the windowed player segment
// download duration values.
func RegisterPlayerSegmentDownloadDuration(clientID string, seconds float64) {
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metrics.m.Lock()
defer metrics.m.Unlock()
windowedDownloadDurations[clientID] = seconds
}
// collectPlaybackErrorCount will take all of the error counts each individual
// player reported and average them into a single metric. This is done so
// one person with bad connectivity doesn't make it look like everything is
// horrible for everyone.
func collectPlaybackErrorCount() {
valueSlice := utils.Float64MapToSlice(windowedErrorCounts)
count := utils.Sum(valueSlice)
windowedErrorCounts = map[string]float64{}
metrics.errorCount = append(metrics.errorCount, TimestampedValue{
Time: time.Now(),
Value: count,
})
if len(metrics.errorCount) > maxCollectionValues {
metrics.errorCount = metrics.errorCount[1:]
}
// Save to Prometheus collector.
playbackErrorCount.Set(count)
}
func collectSegmentDownloadDuration() {
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median := 0.0
max := 0.0
min := 0.0
valueSlice := utils.Float64MapToSlice(windowedDownloadDurations)
if len(valueSlice) > 0 {
median = utils.Median(valueSlice)
min, max = utils.MinMax(valueSlice)
windowedDownloadDurations = map[string]float64{}
}
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metrics.medianSegmentDownloadSeconds = append(metrics.medianSegmentDownloadSeconds, TimestampedValue{
Time: time.Now(),
Value: median,
})
if len(metrics.medianSegmentDownloadSeconds) > maxCollectionValues {
metrics.medianSegmentDownloadSeconds = metrics.medianSegmentDownloadSeconds[1:]
}
metrics.minimumSegmentDownloadSeconds = append(metrics.minimumSegmentDownloadSeconds, TimestampedValue{
Time: time.Now(),
Value: min,
})
if len(metrics.minimumSegmentDownloadSeconds) > maxCollectionValues {
metrics.minimumSegmentDownloadSeconds = metrics.minimumSegmentDownloadSeconds[1:]
}
metrics.maximumSegmentDownloadSeconds = append(metrics.maximumSegmentDownloadSeconds, TimestampedValue{
Time: time.Now(),
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Value: max,
})
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if len(metrics.maximumSegmentDownloadSeconds) > maxCollectionValues {
metrics.maximumSegmentDownloadSeconds = metrics.maximumSegmentDownloadSeconds[1:]
}
}
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// GetMedianDownloadDurationsOverTime will return a window of durations errors over time.
func GetMedianDownloadDurationsOverTime() []TimestampedValue {
return metrics.medianSegmentDownloadSeconds
}
// GetMaximumDownloadDurationsOverTime will return a maximum durations errors over time.
func GetMaximumDownloadDurationsOverTime() []TimestampedValue {
return metrics.maximumSegmentDownloadSeconds
}
// GetMinimumDownloadDurationsOverTime will return a maximum durations errors over time.
func GetMinimumDownloadDurationsOverTime() []TimestampedValue {
return metrics.minimumSegmentDownloadSeconds
}
// GetPlaybackErrorCountOverTime will return a window of playback errors over time.
func GetPlaybackErrorCountOverTime() []TimestampedValue {
return metrics.errorCount
}
func collectLatencyValues() {
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median := 0.0
min := 0.0
max := 0.0
valueSlice := utils.Float64MapToSlice(windowedLatencies)
windowedLatencies = map[string]float64{}
if len(valueSlice) > 0 {
median = utils.Median(valueSlice)
min, max = utils.MinMax(valueSlice)
windowedLatencies = map[string]float64{}
}
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metrics.medianLatency = append(metrics.medianLatency, TimestampedValue{
Time: time.Now(),
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Value: median,
})
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if len(metrics.medianLatency) > maxCollectionValues {
metrics.medianLatency = metrics.medianLatency[1:]
}
metrics.minimumLatency = append(metrics.minimumLatency, TimestampedValue{
Time: time.Now(),
Value: min,
})
if len(metrics.minimumLatency) > maxCollectionValues {
metrics.minimumLatency = metrics.minimumLatency[1:]
}
metrics.maximumLatency = append(metrics.maximumLatency, TimestampedValue{
Time: time.Now(),
Value: max,
})
if len(metrics.maximumLatency) > maxCollectionValues {
metrics.maximumLatency = metrics.maximumLatency[1:]
}
}
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// GetMedianLatencyOverTime will return the median latency values over time.
func GetMedianLatencyOverTime() []TimestampedValue {
if len(metrics.medianLatency) == 0 {
return []TimestampedValue{}
}
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return metrics.medianLatency
}
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// GetMinimumLatencyOverTime will return the min latency values over time.
func GetMinimumLatencyOverTime() []TimestampedValue {
if len(metrics.minimumLatency) == 0 {
return []TimestampedValue{}
}
return metrics.minimumLatency
}
// GetMaximumLatencyOverTime will return the max latency values over time.
func GetMaximumLatencyOverTime() []TimestampedValue {
if len(metrics.maximumLatency) == 0 {
return []TimestampedValue{}
}
return metrics.maximumLatency
}
// collectLowestBandwidth will collect the bandwidth currently collected
// so we can report to the streamer the worst possible streaming condition
// being experienced.
func collectLowestBandwidth() {
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min := 0.0
median := 0.0
max := 0.0
valueSlice := utils.Float64MapToSlice(windowedBandwidths)
if len(windowedBandwidths) > 0 {
min, max = utils.MinMax(valueSlice)
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min = math.Round(min)
max = math.Round(max)
median = utils.Median(valueSlice)
windowedBandwidths = map[string]float64{}
}
metrics.lowestBitrate = append(metrics.lowestBitrate, TimestampedValue{
Time: time.Now(),
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Value: math.Round(min),
})
if len(metrics.lowestBitrate) > maxCollectionValues {
metrics.lowestBitrate = metrics.lowestBitrate[1:]
}
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metrics.medianBitrate = append(metrics.medianBitrate, TimestampedValue{
Time: time.Now(),
Value: math.Round(median),
})
if len(metrics.medianBitrate) > maxCollectionValues {
metrics.medianBitrate = metrics.medianBitrate[1:]
}
metrics.highestBitrate = append(metrics.highestBitrate, TimestampedValue{
Time: time.Now(),
Value: math.Round(max),
})
if len(metrics.highestBitrate) > maxCollectionValues {
metrics.highestBitrate = metrics.highestBitrate[1:]
}
}
// GetSlowestDownloadRateOverTime will return the collected lowest bandwidth values
// over time.
func GetSlowestDownloadRateOverTime() []TimestampedValue {
if len(metrics.lowestBitrate) == 0 {
return []TimestampedValue{}
}
return metrics.lowestBitrate
}
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// GetMedianDownloadRateOverTime will return the collected median bandwidth values.
func GetMedianDownloadRateOverTime() []TimestampedValue {
if len(metrics.medianBitrate) == 0 {
return []TimestampedValue{}
}
return metrics.medianBitrate
}
// GetMaximumDownloadRateOverTime will return the collected maximum bandwidth values.
func GetMaximumDownloadRateOverTime() []TimestampedValue {
if len(metrics.maximumLatency) == 0 {
return []TimestampedValue{}
}
return metrics.maximumLatency
}
// GetMinimumDownloadRateOverTime will return the collected minimum bandwidth values.
func GetMinimumDownloadRateOverTime() []TimestampedValue {
if len(metrics.minimumLatency) == 0 {
return []TimestampedValue{}
}
return metrics.minimumLatency
}
// GetMaxDownloadRateOverTime will return the collected highest bandwidth values.
func GetMaxDownloadRateOverTime() []TimestampedValue {
if len(metrics.highestBitrate) == 0 {
return []TimestampedValue{}
}
return metrics.highestBitrate
}
func collectQualityVariantChanges() {
valueSlice := utils.Float64MapToSlice(windowedQualityVariantChanges)
count := utils.Sum(valueSlice)
windowedQualityVariantChanges = map[string]float64{}
metrics.qualityVariantChanges = append(metrics.qualityVariantChanges, TimestampedValue{
Time: time.Now(),
Value: count,
})
}
// GetQualityVariantChangesOverTime will return the collected quality variant
// changes.
func GetQualityVariantChangesOverTime() []TimestampedValue {
return metrics.qualityVariantChanges
}
// GetPlaybackMetricsRepresentation returns what percentage of all known players
// the metrics represent.
func GetPlaybackMetricsRepresentation() int {
totalPlayerCount := len(core.GetActiveViewers())
representation := utils.IntPercentage(len(windowedBandwidths), totalPlayerCount)
return representation
}