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author | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
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committer | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
commit | 5ff4c17907d5b19510a62e08fd8d3b11e62b431d (patch) | |
tree | c0650497e988f47be9c6f2324fa692a52dea82e1 /test/chan/select2.go | |
parent | 80f18fc933cf3f3e829c5455a1023d69f7b86e52 (diff) | |
download | golang-upstream/60.tar.gz |
Imported Upstream version 60upstream/60
Diffstat (limited to 'test/chan/select2.go')
-rw-r--r-- | test/chan/select2.go | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/test/chan/select2.go b/test/chan/select2.go new file mode 100644 index 000000000..e24c51ed1 --- /dev/null +++ b/test/chan/select2.go @@ -0,0 +1,48 @@ +// $G $D/$F.go && $L $F.$A && ./$A.out + +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package main + +import "runtime" + +func sender(c chan int, n int) { + for i := 0; i < n; i++ { + c <- 1 + } +} + +func receiver(c, dummy chan int, n int) { + for i := 0; i < n; i++ { + select { + case <-c: + // nothing + case <-dummy: + panic("dummy") + } + } +} + +func main() { + runtime.MemProfileRate = 0 + + c := make(chan int) + dummy := make(chan int) + + // warm up + go sender(c, 100000) + receiver(c, dummy, 100000) + runtime.GC() + runtime.MemStats.Alloc = 0 + + // second time shouldn't increase footprint by much + go sender(c, 100000) + receiver(c, dummy, 100000) + runtime.GC() + + if runtime.MemStats.Alloc > 1e5 { + println("BUG: too much memory for 100,000 selects:", runtime.MemStats.Alloc) + } +} |