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runtime/debug: increase threshold on TestSetGCPercent

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Currently TestSetGCPercent checks that NextGC is within 10 MB of the
expected value. For some reason it's much noisier on some of the
builders. To get these passing again, raise the threshold to 20 MB.

Change-Id: I14e64025660d782d81ff0421c1eb898f416e11fe
Reviewed-on: https://go-review.googlesource.com/41374
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Austin Clements 2017-04-21 15:42:53 -04:00 committed by Russ Cox
parent eaf02e1fc9
commit e516227554
1 changed files with 1 additions and 1 deletions
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2
src/runtime/debug/garbage_test.go
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@ -135,7 +135,7 @@ func TestSetGCPercent(t *testing.T) {
t.Fatalf("failed to set up baseline live heap; got %d MB, want %d MB", ms.Alloc>>20, baseline>>20) t.Fatalf("failed to set up baseline live heap; got %d MB, want %d MB", ms.Alloc>>20, baseline>>20)
} }
// NextGC should be ~200 MB. // NextGC should be ~200 MB.
const thresh = 10 << 20 const thresh = 20 << 20 // TODO: Figure out why this is so noisy on some builders
if want := int64(2 * baseline); abs64(want-int64(ms.NextGC)) > thresh { if want := int64(2 * baseline); abs64(want-int64(ms.NextGC)) > thresh {
t.Errorf("NextGC = %d MB, want %d±%d MB", ms.NextGC>>20, want>>20, thresh>>20) t.Errorf("NextGC = %d MB, want %d±%d MB", ms.NextGC>>20, want>>20, thresh>>20)
} }