linux/kernel/sched
Vincent Guittot 4ec4412e1e sched: Ensure cpu_power periodic update
With a lot of small tasks, the softirq sched is nearly never called
when no_hz is enabled. In this case load_balance() is mainly called
with the newly_idle mode which doesn't update the cpu_power.

Add a next_update field which ensure a maximum update period when
there is short activity.

Having stale cpu_power information can skew the load-balancing
decisions, this is cured by the guaranteed update.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1323717668-2143-1-git-send-email-vincent.guittot@linaro.org
2012-01-27 13:28:49 +01:00
..
auto_group.c
auto_group.h
clock.c
core.c sched, block: Unify cache detection 2012-01-27 13:28:48 +01:00
cpupri.c kernel-doc: fix kernel-doc warnings in sched 2012-01-23 08:44:54 -08:00
cpupri.h
debug.c
fair.c sched: Ensure cpu_power periodic update 2012-01-27 13:28:49 +01:00
features.h
idle_task.c
Makefile
rt.c sched/rt: Fix task stack corruption under __ARCH_WANT_INTERRUPTS_ON_CTXSW 2012-01-27 12:49:41 +01:00
sched.h
stats.c
stats.h
stop_task.c