sched/balancing: Periodically decay max cost of idle balance
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>
diff --git a/include/linux/sched.h b/include/linux/sched.h
index be078ff..b5344de 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -810,7 +810,10 @@
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 */