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runtime: account for tiny allocs, for testing.AllocsPerRun

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Fixes #8734.

LGTM=r, bradfitz, dvyukov
R=bradfitz, r, dvyukov
CC=golang-codereviews, iant, khr
https://golang.org/cl/143150043
This commit is contained in:
Russ Cox 2014-09-17 14:49:32 -04:00
parent a883f117a9
commit e19d8a47d1
7 changed files with 43 additions and 3 deletions
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2
src/runtime/malloc.go
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@ -103,7 +103,6 @@ func mallocgc(size uintptr, typ *_type, flags int) unsafe.Pointer {
// standalone escaping variables. On a json benchmark
// the allocator reduces number of allocations by ~12% and
// reduces heap size by ~20%.
tinysize := uintptr(c.tinysize)
if size <= tinysize {
tiny := unsafe.Pointer(c.tiny)
@ -121,6 +120,7 @@ func mallocgc(size uintptr, typ *_type, flags int) unsafe.Pointer {
x = tiny
c.tiny = (*byte)(add(x, size))
c.tinysize -= uintptr(size1)
c.local_tinyallocs++
if debugMalloc {
mp := acquirem()
if mp.mallocing == 0 {