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runtime: deflake TestGoroutineProfileTrivial

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Failed at https://storage.googleapis.com/go-build-log/9875de36/nacl-amd64p32_931ba6cf.log

Change-Id: I2bc204ed58da543ee2534b69c29c8e8485d54683
Reviewed-on: https://go-review.googlesource.com/19155
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Russ Cox 2016-02-02 10:15:34 -05:00
parent f309bf3eef
commit 1c6a35b4fe
1 changed files with 17 additions and 8 deletions
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15
src/runtime/runtime_test.go
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@ -310,13 +310,22 @@ func TestAppendSliceGrowth(t *testing.T) {
}
func TestGoroutineProfileTrivial(t *testing.T) {
// Calling GoroutineProfile twice in a row should find the same number of goroutines,
// but it's possible there are goroutines just about to exit, so we might end up
// with fewer in the second call. Try a few times; it should converge once those
// zombies are gone.
for i := 0; ; i++ {
n1, ok := GoroutineProfile(nil) // should fail, there's at least 1 goroutine
if n1 < 1 || ok {
t.Fatalf("GoroutineProfile(nil) = %d, %v, want >0, false", n1, ok)
}
n2, ok := GoroutineProfile(make([]StackRecord, n1))
if n2 != n1 || !ok {
t.Fatalf("GoroutineProfile(%d) = %d, %v, want %d, true", n1, n2, ok, n1)
if n2 == n1 && ok {
break
}
t.Logf("GoroutineProfile(%d) = %d, %v, want %d, true", n1, n2, ok, n1)
if i >= 10 {
t.Fatalf("GoroutineProfile not converging")
}
}
}