Commit 9c4801ce authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched: more agressive idle balancing 



the Linux scheduler is starving a number of workloads. So default
to more agressive idle-balancing. This hurts lmbench context-switching
numbers (which was the main reason we sucked at idle-balancing for
such a long time) but the lmbench numbers are fine once the system is
minimally utilized.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 0fec171c

include/linux/topology.h

+7 −5
Original line number Diff line number Diff line
@@ -98,7 +98,7 @@ 
	.cache_nice_tries	= 0,			\

	.busy_idx		= 0,			\

	.idle_idx		= 0,			\

	.newidle_idx		= 1,			\

	.newidle_idx		= 0,			\

	.wake_idx		= 0,			\

	.forkexec_idx		= 0,			\

	.flags			= SD_LOAD_BALANCE	\
@@ -128,14 +128,15 @@ 
	.imbalance_pct		= 125,			\

	.cache_nice_tries	= 1,			\

	.busy_idx		= 2,			\

	.idle_idx		= 1,			\

	.newidle_idx		= 2,			\

	.idle_idx		= 0,			\

	.newidle_idx		= 0,			\

	.wake_idx		= 1,			\

	.forkexec_idx		= 1,			\

	.flags			= SD_LOAD_BALANCE	\

				| SD_BALANCE_NEWIDLE	\

				| SD_BALANCE_EXEC	\

				| SD_WAKE_AFFINE	\

				| SD_WAKE_IDLE		\

				| SD_SHARE_PKG_RESOURCES\

				| BALANCE_FOR_MC_POWER,	\

	.last_balance		= jiffies,		\
@@ -158,14 +159,15 @@ 
	.imbalance_pct		= 125,			\

	.cache_nice_tries	= 1,			\

	.busy_idx		= 2,			\

	.idle_idx		= 1,			\

	.newidle_idx		= 2,			\

	.idle_idx		= 0,			\

	.newidle_idx		= 0,			\

	.wake_idx		= 1,			\

	.forkexec_idx		= 1,			\

	.flags			= SD_LOAD_BALANCE	\

				| SD_BALANCE_NEWIDLE	\

				| SD_BALANCE_EXEC	\

				| SD_WAKE_AFFINE	\

				| SD_WAKE_IDLE		\

				| BALANCE_FOR_PKG_POWER,\

	.last_balance		= jiffies,		\

	.balance_interval	= 1,			\

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