From: Russ Cox <rsc@golang.org>
Date: Fri, 8 Mar 2013 16:25:21 +0000 (-0500)
Subject: runtime: make TestStackMem a little less flaky
X-Git-Tag: go1.1rc2~632
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=091d7210c7bbcc7497a48a41be091e1957d17717;p=gostls13.git

runtime: make TestStackMem a little less flaky

Have seen failures with GOMAXPROCS=4 on Windows.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7626043
---

diff --git a/src/pkg/runtime/stack_test.go b/src/pkg/runtime/stack_test.go
index 759f7c46ed..74f29f34ec 100644
--- a/src/pkg/runtime/stack_test.go
+++ b/src/pkg/runtime/stack_test.go
@@ -1533,7 +1533,7 @@ func stack5000() (uintptr, uintptr) { var buf [5000]byte; use(buf[:]); return St
 func TestStackMem(t *testing.T) {
 	const (
 		BatchSize      = 32
-		BatchCount     = 512
+		BatchCount     = 256
 		ArraySize      = 1024
 		RecursionDepth = 128
 	)
@@ -1562,6 +1562,11 @@ func TestStackMem(t *testing.T) {
 		for i := 0; i < BatchSize; i++ {
 			<-c
 		}
+
+		// The goroutines have signaled via c that they are ready to exit.
+		// Give them a chance to exit by sleeping. If we don't wait, we
+		// might not reuse them on the next batch.
+		time.Sleep(10 * time.Millisecond)
 	}
 	s1 := new(MemStats)
 	ReadMemStats(s1)