diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/runtime/proc_test.go | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/runtime/proc_test.go b/src/runtime/proc_test.go index e7c0f3333e..90a6cab874 100644 --- a/src/runtime/proc_test.go +++ b/src/runtime/proc_test.go @@ -428,10 +428,13 @@ func TestPingPongHog(t *testing.T) { <-lightChan // Check that hogCount and lightCount are within a factor of - // 2, which indicates that both pairs of goroutines handed off - // the P within a time-slice to their buddy. - if hogCount > lightCount*2 || lightCount > hogCount*2 { - t.Fatalf("want hogCount/lightCount in [0.5, 2]; got %d/%d = %g", hogCount, lightCount, float64(hogCount)/float64(lightCount)) + // 5, which indicates that both pairs of goroutines handed off + // the P within a time-slice to their buddy. We can use a + // fairly large factor here to make this robust: if the + // scheduler isn't working right, the gap should be ~1000X. + const factor = 5 + if hogCount > lightCount*factor || lightCount > hogCount*factor { + t.Fatalf("want hogCount/lightCount in [%v, %v]; got %d/%d = %g", 1.0/factor, factor, hogCount, lightCount, float64(hogCount)/float64(lightCount)) } } |