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package solomon
import (
"bytes"
"context"
"fmt"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/stretchr/testify/require"
"github.com/ydb-platform/ydb/library/go/core/metrics"
)
type spinBarrier struct {
count int64
waiting atomic.Int64
step atomic.Int64
}
func newSpinBarrier(size int) *spinBarrier {
return &spinBarrier{count: int64(size)}
}
func (b *spinBarrier) wait() {
s := b.step.Load()
w := b.waiting.Add(1)
if w == b.count {
b.waiting.Store(0)
b.step.Add(1)
} else {
for s == b.step.Load() {
// noop
}
}
}
func TestRaceDurationHistogramVecVersusStreamJson(t *testing.T) {
// Regression test: https://github.com/ydb-platform/ydb/review/2690822/details
registry := NewRegistry(NewRegistryOpts())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
const stepCount = 200
barrier := newSpinBarrier(2)
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
// Consumer
defer wg.Done()
out := bytes.NewBuffer(nil)
for i := 0; i < stepCount; i++ {
out.Reset()
barrier.wait()
_, err := registry.StreamJSON(ctx, out)
if err != nil {
require.ErrorIs(t, err, context.Canceled)
break
}
}
}()
wg.Add(1)
go func() {
// Producer
defer wg.Done()
const success = "success"
const version = "version"
vecs := make([]metrics.TimerVec, 0)
buckets := metrics.NewDurationBuckets(1, 2, 3)
ProducerLoop:
for i := 0; i < stepCount; i++ {
barrier.wait()
vec := registry.DurationHistogramVec(
fmt.Sprintf("latency-%v", i),
buckets,
[]string{success, version},
)
Rated(vec)
vecs = append(vecs, vec)
for _, v := range vecs {
v.With(map[string]string{success: "ok", version: "123"}).RecordDuration(time.Second)
v.With(map[string]string{success: "false", version: "123"}).RecordDuration(time.Millisecond)
}
select {
case <-ctx.Done():
break ProducerLoop
default:
// noop
}
}
}()
wg.Wait()
}
func TestRaceDurationHistogramRecordDurationVersusStreamJson(t *testing.T) {
// Regression test: https://github.com/ydb-platform/ydb/review/2690822/details
registry := NewRegistry(NewRegistryOpts())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
const stepCount = 200
barrier := newSpinBarrier(2)
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
// Consumer
defer wg.Done()
out := bytes.NewBuffer(nil)
for i := 0; i < stepCount; i++ {
out.Reset()
barrier.wait()
_, err := registry.StreamJSON(ctx, out)
if err != nil {
require.ErrorIs(t, err, context.Canceled)
break
}
}
}()
wg.Add(1)
go func() {
// Producer
defer wg.Done()
buckets := metrics.NewDurationBuckets(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
hist := registry.DurationHistogram("latency", buckets)
// Rated(hist)
ProducerLoop:
for i := 0; i < stepCount; i++ {
barrier.wait()
hist.RecordDuration(time.Duration(i % 10))
select {
case <-ctx.Done():
break ProducerLoop
default:
// noop
}
}
}()
wg.Wait()
}
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