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sched/balancing: Periodically decay max cost of idle balance

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This patch builds on patch 2 and periodically decays that max value to
do idle balancing per sched domain by approximately 1% per second. Also
decay the rq's max_idle_balance_cost value.

Signed-off-by: Jason Low <jason.low2@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1379096813-3032-4-git-send-email-jason.low2@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Jason Low 2013-09-13 11:26:53 -07:00 • committed by Ingo Molnar
commit f48627e686
4 changed files with 38 additions and 7 deletions
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3
include/linux/sched.h
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@ -810,7 +810,10 @@ struct sched_domain {
unsigned int nr_balance_failed; /* initialise to 0 */
u64 last_update;
/* idle_balance() stats */
u64 max_newidle_lb_cost;
unsigned long next_decay_max_lb_cost;
#ifdef CONFIG_SCHEDSTATS
/* load_balance() stats */