diff options
| author | Russ Cox <rsc@golang.org> | 2010-01-09 09:47:45 -0800 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2010-01-09 09:47:45 -0800 |
| commit | 5328df6534b9fa2ca83cbbac013ef1e094e11907 (patch) | |
| tree | 0a6fa7c1c69e10eb519d896d2634b6662999e835 /src/pkg/runtime/proc.c | |
| parent | 752b1702d03fbc4377fe856a378c7fa4abbb006f (diff) | |
| download | go-5328df6534b9fa2ca83cbbac013ef1e094e11907.tar.xz | |
runtime: check for preemption due to garbage collection
in various already expensive routines.
helps keep cpu utilization up when GOMAXPROCS > 1,
but not a full solution.
http://groups.google.com/group/golang-nuts/t/7a9535c4136d3e2
R=r
CC=golang-dev
https://golang.org/cl/184043
Diffstat (limited to 'src/pkg/runtime/proc.c')
| -rw-r--r-- | src/pkg/runtime/proc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/pkg/runtime/proc.c b/src/pkg/runtime/proc.c index 6ac4090ebe..6324b4be4c 100644 --- a/src/pkg/runtime/proc.c +++ b/src/pkg/runtime/proc.c @@ -14,6 +14,8 @@ G g0; // idle goroutine for m0 static int32 debug = 0; +int32 gcwaiting; + // Go scheduler // // The go scheduler's job is to match ready-to-run goroutines (`g's) @@ -362,6 +364,7 @@ void stoptheworld(void) { lock(&sched); + gcwaiting = 1; sched.mcpumax = 1; while(sched.mcpu > 1) { noteclear(&sched.stopped); @@ -379,6 +382,7 @@ void starttheworld(void) { lock(&sched); + gcwaiting = 0; sched.mcpumax = sched.gomaxprocs; matchmg(); unlock(&sched); |