[RFC PATCH 0/5] vmstats for compaction, migration and autonuma

From: Mel Gorman
Date: Mon Oct 22 2012 - 04:07:25 EST

I'm travelling for a conference at the moment so these patches are not
tested but with the ongoing NUMA migration work I figured it was best to
post these sooner rather than later.

This series adds vmstat counters and tracepoints for migration, compaction
and autonuma. Using them it's possible to create a basic cost model to
estimate the overhead due to compaction or autonuma. Using the stats it
is also possible to measure if a workload is converging on autonuma or
not and potentially measure how quickly it is converging.

Ideally the same stats would be available for schednuma but I did not
review the series when it was last posted in July and had not seen a
recent posting. I only recently heard they were in the -tip tree but will
not get the chance to look at them until I've finished travelling in a
weeks time. If schednuma had similar stats it would then be possible to
compare schednuma and autonuma in terms of how quickly a workload converges
with either approach.

include/linux/migrate.h | 14 +++++++++-
include/linux/vm_event_item.h | 12 ++++++++-
include/trace/events/migrate.h | 52 ++++++++++++++++++++++++++++++++++++++++
mm/autonuma.c | 22 +++++++++++++----
mm/compaction.c | 15 +++++++----
mm/memory-failure.c | 3 +-
mm/memory_hotplug.c | 3 +-
mm/mempolicy.c | 6 +++-
mm/migrate.c | 16 ++++++++++-
mm/page_alloc.c | 3 +-
mm/vmstat.c | 16 ++++++++++--
11 files changed, 139 insertions(+), 23 deletions(-)
create mode 100644 include/trace/events/migrate.h


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