aboutsummaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorNikhil Rao <ncrao@google.com>2010-11-17 11:42:04 -0800
committerIngo Molnar <mingo@elte.hu>2010-11-18 13:12:33 +0100
commitd5ad140bc1505a98c0f040937125bfcbb508078f (patch)
treeadc1581eb61159675f9163515fd2402f81b586e2 /kernel
parentb5482cfa1c95a188b3054fa33274806add91bbe5 (diff)
downloadmrst-s0i3-test-d5ad140bc1505a98c0f040937125bfcbb508078f.tar.gz
mrst-s0i3-test-d5ad140bc1505a98c0f040937125bfcbb508078f.tar.xz
mrst-s0i3-test-d5ad140bc1505a98c0f040937125bfcbb508078f.zip
sched: Fix idle balancing
An earlier commit reverts idle balancing throttling reset to fix a 30% regression in volanomark throughput. We still need to reset idle_stamp when we pull a task in newidle balance. Reported-by: Alex Shi <alex.shi@intel.com> Signed-off-by: Nikhil Rao <ncrao@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1290022924-3548-1-git-send-email-ncrao@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched_fair.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index ba0556dc7c0..00ebd768667 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -3215,8 +3215,10 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
interval = msecs_to_jiffies(sd->balance_interval);
if (time_after(next_balance, sd->last_balance + interval))
next_balance = sd->last_balance + interval;
- if (pulled_task)
+ if (pulled_task) {
+ this_rq->idle_stamp = 0;
break;
+ }
}
raw_spin_lock(&this_rq->lock);