Peter Zijlstra 8c8a743c50 sched/numa: Use {cpu, pid} to create task groups for shared faults ... While parallel applications tend to align their data on the cache boundary, they tend not to align on the page or THP boundary. Consequently tasks that partition their data can still "false-share" pages presenting a problem for optimal NUMA placement. This patch uses NUMA hinting faults to chain tasks together into numa_groups. As well as storing the NID a task was running on when accessing a page a truncated representation of the faulting PID is stored. If subsequent faults are from different PIDs it is reasonable to assume that those two tasks share a page and are candidates for being grouped together. Note that this patch makes no scheduling decisions based on the grouping information. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1381141781-10992-44-git-send-email-mgorman@suse.de Signed-off-by: Ingo Molnar <mingo@kernel.org>		2013-10-09 14:47:47 +02:00
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auto_group.c	sched/autogroup: Fix race with task_groups list	2013-05-28 09:40:22 +02:00
auto_group.h	Revert "sched/autogroup: Fix crash on reboot when autogroup is disabled"	2012-12-11 10:23:45 +01:00
clock.c	sched_clock: Prevent 64bit inatomicity on 32bit systems	2013-04-08 11:50:44 +02:00
core.c	sched/numa: Use {cpu, pid} to create task groups for shared faults	2013-10-09 14:47:47 +02:00
cpuacct.c	cgroup: pass around cgroup_subsys_state instead of cgroup in file methods	2013-08-08 20:11:24 -04:00
cpuacct.h	sched/cpuacct: Initialize root cpuacct earlier	2013-04-10 13:54:20 +02:00
cpupri.c	sched: Fix some kernel-doc warnings	2013-07-18 09:58:21 +02:00
cpupri.h	sched: Move all scheduler bits into kernel/sched/	2011-11-17 12:20:22 +01:00
cputime.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-05 12:36:46 -07:00
debug.c	sched/debug: Take PID namespace into account	2013-09-12 19:14:16 +02:00
fair.c	sched/numa: Use {cpu, pid} to create task groups for shared faults	2013-10-09 14:47:47 +02:00
features.h	sched/numa: Resist moving tasks towards nodes with fewer hinting faults	2013-10-09 12:40:27 +02:00
idle_task.c	sched/numa: Introduce migrate_swap()	2013-10-09 12:40:46 +02:00
Makefile	sched: Factor out load calculation code from sched/core.c --> sched/proc.c	2013-05-07 13:14:50 +02:00
proc.c	sched: Change get_rq_runnable_load() to static and inline	2013-06-27 10:07:44 +02:00
rt.c	sched/numa: Introduce migrate_swap()	2013-10-09 12:40:46 +02:00
sched.h	sched/numa: Use {cpu, pid} to create task groups for shared faults	2013-10-09 14:47:47 +02:00
stats.c	fix a leak in /proc/schedstats	2013-04-29 15:41:45 -04:00
stats.h	sched: Micro-optimize by dropping unnecessary task_rq() calls	2013-09-25 13:51:06 +02:00
stop_task.c	sched/numa: Introduce migrate_swap()	2013-10-09 12:40:46 +02:00