| From 44415e7327fead0d3acbe1e4b310fc6bc3117d6d Mon Sep 17 00:00:00 2001 |
| From: Alex Shi <alex.shi@intel.com> |
| Date: Thu, 10 Feb 2011 10:23:29 +0100 |
| Subject: sched: Fix volanomark performance regression |
| |
| Commit: b5482cfa1c95a188b3054fa33274806add91bbe5 upstream |
| |
| Commit fab4762 triggers excessive idle balancing, causing a ~30% loss in |
| volanomark throughput. Remove idle balancing throttle reset. |
| |
| Originally-by: Alex Shi <alex.shi@intel.com> |
| Signed-off-by: Mike Galbraith <efault@gmx.de> |
| Acked-by: Nikhil Rao <ncrao@google.com> |
| Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> |
| LKML-Reference: <1289928732.5169.211.camel@maggy.simson.net> |
| Signed-off-by: Ingo Molnar <mingo@elte.hu> |
| Signed-off-by: Mike Galbraith <efault@gmx.de> |
| Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| --- |
| kernel/sched.c | 4 ---- |
| 1 file changed, 4 deletions(-) |
| |
| --- a/kernel/sched.c |
| +++ b/kernel/sched.c |
| @@ -3326,10 +3326,6 @@ static void pull_task(struct rq *src_rq, |
| set_task_cpu(p, this_cpu); |
| activate_task(this_rq, p, 0); |
| check_preempt_curr(this_rq, p, 0); |
| - |
| - /* re-arm NEWIDLE balancing when moving tasks */ |
| - src_rq->avg_idle = this_rq->avg_idle = 2*sysctl_sched_migration_cost; |
| - this_rq->idle_stamp = 0; |
| } |
| |
| /* |
