mirror of https://github.com/tidwall/tile38.git
49 lines
849 B
Go
49 lines
849 B
Go
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package metrics
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import (
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"runtime"
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"runtime/debug"
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"testing"
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"time"
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)
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func BenchmarkDebugGCStats(b *testing.B) {
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r := NewRegistry()
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RegisterDebugGCStats(r)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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CaptureDebugGCStatsOnce(r)
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}
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}
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func TestDebugGCStatsBlocking(t *testing.T) {
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if g := runtime.GOMAXPROCS(0); g < 2 {
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t.Skipf("skipping TestDebugGCMemStatsBlocking with GOMAXPROCS=%d\n", g)
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return
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}
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ch := make(chan int)
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go testDebugGCStatsBlocking(ch)
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var gcStats debug.GCStats
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t0 := time.Now()
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debug.ReadGCStats(&gcStats)
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t1 := time.Now()
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t.Log("i++ during debug.ReadGCStats:", <-ch)
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go testDebugGCStatsBlocking(ch)
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d := t1.Sub(t0)
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t.Log(d)
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time.Sleep(d)
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t.Log("i++ during time.Sleep:", <-ch)
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}
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func testDebugGCStatsBlocking(ch chan int) {
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i := 0
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for {
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select {
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case ch <- i:
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return
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default:
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i++
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}
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}
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}
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