diff options
Diffstat (limited to 'libgo/go/runtime/chan_test.go')
| -rw-r--r-- | libgo/go/runtime/chan_test.go | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/libgo/go/runtime/chan_test.go b/libgo/go/runtime/chan_test.go index 29fb321c926..ac81d409bda 100644 --- a/libgo/go/runtime/chan_test.go +++ b/libgo/go/runtime/chan_test.go @@ -485,11 +485,11 @@ func TestSelectFairness(t *testing.T) { // If the select in the goroutine is fair, // cnt1 and cnt2 should be about the same value. // With 10,000 trials, the expected margin of error at - // a confidence level of five nines is 4.4172 / (2 * Sqrt(10000)). + // a confidence level of six nines is 4.891676 / (2 * Sqrt(10000)). r := float64(cnt1) / trials e := math.Abs(r - 0.5) t.Log(cnt1, cnt2, r, e) - if e > 4.4172/(2*math.Sqrt(trials)) { + if e > 4.891676/(2*math.Sqrt(trials)) { t.Errorf("unfair select: in %d trials, results were %d, %d", trials, cnt1, cnt2) } close(done) @@ -724,6 +724,7 @@ func TestSelectStackAdjust(t *testing.T) { if after.NumGC-before.NumGC >= 2 { goto done } + runtime.Gosched() } t.Fatal("failed to trigger concurrent GC") done: @@ -1131,6 +1132,20 @@ func BenchmarkChanPopular(b *testing.B) { wg.Wait() } +func BenchmarkChanClosed(b *testing.B) { + c := make(chan struct{}) + close(c) + b.RunParallel(func(pb *testing.PB) { + for pb.Next() { + select { + case <-c: + default: + b.Error("Unreachable") + } + } + }) +} + var ( alwaysFalse = false workSink = 0 |