Mike Galbraith e0a79f529d sched: Fix select_idle_sibling() bouncing cow syndrome ... If the previous CPU is cache affine and idle, select it. The current implementation simply traverses the sd_llc domain, taking the first idle CPU encountered, which walks buddy pairs hand in hand over the package, inflicting excruciating pain. 1 tbench pair (worst case) in a 10 core + SMT package: pre 15.22 MB/sec 1 procs post 252.01 MB/sec 1 procs Signed-off-by: Mike Galbraith <bitbucket@online.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1359371965.5783.127.camel@marge.simpson.net Signed-off-by: Ingo Molnar <mingo@kernel.org>		2013-02-04 20:07:24 +01:00
..
auto_group.c	Revert "sched/autogroup: Fix crash on reboot when autogroup is disabled"	2012-12-11 10:23:45 +01:00
auto_group.h	Revert "sched/autogroup: Fix crash on reboot when autogroup is disabled"	2012-12-11 10:23:45 +01:00
clock.c
core.c	wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task	2013-01-22 10:08:17 -08:00
cpupri.c	sched: Fix minor code style issues	2012-07-26 11:47:00 +02:00
cpupri.h
cputime.c	cputime: Avoid multiplication overflow on utime scaling	2013-01-27 14:04:44 +01:00
debug.c	sched: Replace update_shares weight distribution with per-entity computation	2012-10-24 10:27:28 +02:00
fair.c	sched: Fix select_idle_sibling() bouncing cow syndrome	2013-02-04 20:07:24 +01:00
features.h	Automatic NUMA Balancing V11	2012-12-16 15:18:08 -08:00
idle_task.c	sched/nohz: Rewrite and fix load-avg computation -- again	2012-07-05 20:58:13 +02:00
Makefile	sched: Move cputime code to its own file	2012-08-20 13:05:17 +02:00
rt.c	sched/rt: Further simplify pick_rt_task()	2013-02-03 19:54:58 +01:00
sched.h	Automatic NUMA Balancing V11	2012-12-16 15:18:08 -08:00
stats.c	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
stats.h
stop_task.c	sched: Fix migration thread runtime bogosity	2012-08-13 18:41:55 +02:00