diff options
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/malloc.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index 551acd0796..f20ded5bf7 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -1221,6 +1221,13 @@ func profilealloc(mp *m, x unsafe.Pointer, size uintptr) { // distribution (exp(MemProfileRate)), so the best return value is a random // number taken from an exponential distribution whose mean is MemProfileRate. func nextSample() uintptr { + if MemProfileRate == 1 { + // Callers assign our return value to + // mcache.next_sample, but next_sample is not used + // when the rate is 1. So avoid the math below and + // just return something. + return 0 + } if GOOS == "plan9" { // Plan 9 doesn't support floating point in note handler. if g := getg(); g == g.m.gsignal { |