mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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36be090cd5
- Use bytesutil.InternString() instead of strings.Clone() for inputKey and outputKey in aggregatorpushSamples(). This should reduce string allocation rate, since strings can be re-used between aggrState flushes. - Reduce memory allocations at dedupAggrShard by storing dedupAggrSample by value in the active series map. - Remove duplicate call to bytesutil.InternBytes() at Deduplicator, since it is already called inside dedupAggr.pushSamples(). - Add missing string interning at rateAggrState.pushSamples(). Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6402
98 lines
2.3 KiB
Go
98 lines
2.3 KiB
Go
package streamaggr
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import (
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"strconv"
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"sync"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
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"github.com/valyala/histogram"
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)
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// quantilesAggrState calculates output=quantiles, e.g. the the given quantiles over the input samples.
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type quantilesAggrState struct {
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m sync.Map
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phis []float64
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}
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type quantilesStateValue struct {
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mu sync.Mutex
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h *histogram.Fast
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deleted bool
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}
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func newQuantilesAggrState(phis []float64) *quantilesAggrState {
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return &quantilesAggrState{
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phis: phis,
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}
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}
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func (as *quantilesAggrState) pushSamples(samples []pushSample) {
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for i := range samples {
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s := &samples[i]
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outputKey := getOutputKey(s.key)
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again:
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v, ok := as.m.Load(outputKey)
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if !ok {
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// The entry is missing in the map. Try creating it.
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h := histogram.GetFast()
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v = &quantilesStateValue{
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h: h,
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}
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outputKey = bytesutil.InternString(outputKey)
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vNew, loaded := as.m.LoadOrStore(outputKey, v)
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if loaded {
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// Use the entry created by a concurrent goroutine.
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histogram.PutFast(h)
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v = vNew
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}
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}
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sv := v.(*quantilesStateValue)
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sv.mu.Lock()
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deleted := sv.deleted
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if !deleted {
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sv.h.Update(s.value)
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}
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sv.mu.Unlock()
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if deleted {
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// The entry has been deleted by the concurrent call to flushState
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// Try obtaining and updating the entry again.
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goto again
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}
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}
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}
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func (as *quantilesAggrState) flushState(ctx *flushCtx, resetState bool) {
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currentTimeMsec := int64(fasttime.UnixTimestamp()) * 1000
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m := &as.m
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phis := as.phis
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var quantiles []float64
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var b []byte
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m.Range(func(k, v interface{}) bool {
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if resetState {
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// Atomically delete the entry from the map, so new entry is created for the next flush.
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m.Delete(k)
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}
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sv := v.(*quantilesStateValue)
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sv.mu.Lock()
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quantiles = sv.h.Quantiles(quantiles[:0], phis)
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histogram.PutFast(sv.h)
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if resetState {
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// Mark the entry as deleted, so it won't be updated anymore by concurrent pushSample() calls.
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sv.deleted = true
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}
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sv.mu.Unlock()
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key := k.(string)
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for i, quantile := range quantiles {
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b = strconv.AppendFloat(b[:0], phis[i], 'g', -1, 64)
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phiStr := bytesutil.InternBytes(b)
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ctx.appendSeriesWithExtraLabel(key, "quantiles", currentTimeMsec, quantile, "quantile", phiStr)
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}
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return true
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})
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}
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