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| author | Russ Cox <rsc@golang.org> | 2015-03-08 20:56:15 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2015-03-20 00:02:30 +0000 |
| commit | 564eab891a2a0da77aeec29d94a5a4c0c9d002b8 (patch) | |
| tree | 5cf775727aa1f454a9c609b4a52ce446b19f6aaa /src/runtime/runtime2.go | |
| parent | 01af72705255fbb48ea3ff3558766537dd0a8ee0 (diff) | |
| download | go-564eab891a2a0da77aeec29d94a5a4c0c9d002b8.tar.xz | |
runtime: add GODEBUG=sbrk=1 to bypass memory allocator (and GC)
To reduce lock contention in this mode, makes persistent allocation state per-P,
which means at most 64 kB overhead x $GOMAXPROCS, which should be
completely tolerable.
Change-Id: I34ca95e77d7e67130e30822e5a4aff6772b1a1c5
Reviewed-on: https://go-review.googlesource.com/7740
Reviewed-by: Rick Hudson <rlh@golang.org>
Diffstat (limited to 'src/runtime/runtime2.go')
| -rw-r--r-- | src/runtime/runtime2.go | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go index 6604b9920c..9ea3fd197f 100644 --- a/src/runtime/runtime2.go +++ b/src/runtime/runtime2.go @@ -369,6 +369,8 @@ type p struct { tracebuf *traceBuf + palloc persistentAlloc // per-P to avoid mutex + pad [64]byte } |