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| author | Peter Weinberger <pjw@google.com> | 2016-10-28 15:12:18 -0400 |
|---|---|---|
| committer | Peter Weinberger <pjw@google.com> | 2016-10-28 22:14:10 +0000 |
| commit | a1b6e1692b063488cfcc51c258b159ccce4f7d23 (patch) | |
| tree | 8210191abf5c27e1029b37227650645c610b5995 /src/runtime/mprof.go | |
| parent | ec5b6406b76462a1a97ce19f86c5c23ac1d2c830 (diff) | |
| download | go-a1b6e1692b063488cfcc51c258b159ccce4f7d23.tar.gz go-a1b6e1692b063488cfcc51c258b159ccce4f7d23.zip | |
runtime: ensure elapsed cycles are not negative
On solaris/amd64 sometimes the reported cycle count is negative. Replace
with 0.
Change-Id: I364eea5ca072281245c7ab3afb0bf69adc3a8eae
Reviewed-on: https://go-review.googlesource.com/32258
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'src/runtime/mprof.go')
| -rw-r--r-- | src/runtime/mprof.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/runtime/mprof.go b/src/runtime/mprof.go index b3452f2c87..fc06d8dbe7 100644 --- a/src/runtime/mprof.go +++ b/src/runtime/mprof.go @@ -346,6 +346,9 @@ func SetMutexProfileFraction(rate int) int { //go:linkname mutexevent sync.event func mutexevent(cycles int64, skip int) { + if cycles < 0 { + cycles = 0 + } rate := int64(atomic.Load64(&mutexprofilerate)) // TODO(pjw): measure impact of always calling fastrand vs using something // like malloc.go:nextSample() |