Mel Gorman b8593bfda1 mm: sched: Adapt the scanning rate if a NUMA hinting fault does not migrate ... The PTE scanning rate and fault rates are two of the biggest sources of system CPU overhead with automatic NUMA placement. Ideally a proper policy would detect if a workload was properly placed, schedule and adjust the PTE scanning rate accordingly. We do not track the necessary information to do that but we at least know if we migrated or not. This patch scans slower if a page was not migrated as the result of a NUMA hinting fault up to sysctl_numa_balancing_scan_period_max which is now higher than the previous default. Once every minute it will reset the scanner in case of phase changes. This is hilariously crude and the numbers are arbitrary. Workloads will converge quite slowly in comparison to what a proper policy should be able to do. On the plus side, we will chew up less CPU for workloads that have no need for automatic balancing. Signed-off-by: Mel Gorman <mgorman@suse.de>		2012-12-11 14:42:55 +00:00
..
auto_group.c	sched: Clean up parameter passing of proc_sched_autogroup_set_nice()	2012-03-02 12:23:49 +01:00
auto_group.h
clock.c
core.c	mm: sched: Adapt the scanning rate if a NUMA hinting fault does not migrate	2012-12-11 14:42:55 +00:00
cpupri.c	sched: Fix minor code style issues	2012-07-26 11:47:00 +02:00
cpupri.h
cputime.c	vtime: Consolidate system/idle context detection	2012-09-25 15:42:37 +02:00
debug.c	sched/debug: Fix printing large integers on 32-bit platforms	2012-05-14 15:05:28 +02:00
fair.c	mm: sched: Adapt the scanning rate if a NUMA hinting fault does not migrate	2012-12-11 14:42:55 +00:00
features.h	mm: numa: Add fault driven placement and migration	2012-12-11 14:42:45 +00:00
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: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW	2012-09-13 16:52:04 +02:00
sched.h	mm: numa: Add fault driven placement and migration	2012-12-11 14:42:45 +00:00
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