From: Dave Chinner <david@fromorbit.com>
To: Mel Gorman <mgorman@suse.de>
Cc: ppc-dev <linuxppc-dev@lists.ozlabs.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
xfs@oss.sgi.com, Linux-MM <linux-mm@kvack.org>,
Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH 4/4] mm: numa: Slow PTE scan rate if migration failures occur
Date: Tue, 17 Mar 2015 18:06:55 +1100 [thread overview]
Message-ID: <20150317070655.GB10105@dastard> (raw)
In-Reply-To: <20150312184925.GH3406@suse.de>
On Thu, Mar 12, 2015 at 06:49:26PM +0000, Mel Gorman wrote:
> On Thu, Mar 12, 2015 at 09:20:36AM -0700, Linus Torvalds wrote:
> > On Thu, Mar 12, 2015 at 6:10 AM, Mel Gorman <mgorman@suse.de> wrote:
> > >
> > > I believe you're correct and it matches what was observed. I'm still
> > > travelling and wireless is dirt but managed to queue a test using pmd_dirty
> >
> > Ok, thanks.
> >
> > I'm not entirely happy with that change, and I suspect the whole
> > heuristic should be looked at much more (maybe it should also look at
> > whether it's executable, for example), but it's a step in the right
> > direction.
> >
>
> I can follow up when I'm back in work properly. As you have already pulled
> this in directly, can you also consider pulling in "mm: thp: return the
> correct value for change_huge_pmd" please? The other two patches were very
> minor can be resent through the normal paths later.
TO close the loop here, now I'm back home and can run tests:
config 3.19 4.0-rc1 4.0-rc4
defaults 8m08s 9m34s 9m14s
-o ag_stride=-1 4m04s 4m38s 4m11s
-o bhash=101073 6m04s 17m43s 7m35s
-o ag_stride=-1,bhash=101073 4m54s 9m58s 7m50s
It's better but there are still significant regressions, especially
for the large memory footprint cases. I haven't had a chance to look
at any stats or profiles yet, so I don't know yet whether this is
still page fault related or some other problem....
Cheers,
Dave
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2015-03-17 7:07 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-07 15:20 [RFC PATCH 0/4] Automatic NUMA balancing and PROT_NONE handling followup v2r8 Mel Gorman
2015-03-07 15:20 ` [PATCH 1/4] mm: thp: Return the correct value for change_huge_pmd Mel Gorman
2015-03-07 20:13 ` Linus Torvalds
2015-03-07 20:31 ` Linus Torvalds
2015-03-07 20:56 ` Mel Gorman
2015-03-07 15:20 ` [PATCH 2/4] mm: numa: Remove migrate_ratelimited Mel Gorman
2015-03-07 15:20 ` [PATCH 3/4] mm: numa: Mark huge PTEs young when clearing NUMA hinting faults Mel Gorman
2015-03-07 18:33 ` Linus Torvalds
2015-03-07 18:42 ` Linus Torvalds
2015-03-07 15:20 ` [PATCH 4/4] mm: numa: Slow PTE scan rate if migration failures occur Mel Gorman
2015-03-07 16:36 ` Ingo Molnar
2015-03-07 17:37 ` Mel Gorman
2015-03-08 9:54 ` Ingo Molnar
2015-03-07 19:12 ` Linus Torvalds
2015-03-08 10:02 ` Ingo Molnar
2015-03-08 18:35 ` Linus Torvalds
2015-03-08 18:46 ` Linus Torvalds
2015-03-09 11:29 ` Dave Chinner
2015-03-09 16:52 ` Linus Torvalds
2015-03-09 19:19 ` Dave Chinner
2015-03-10 23:55 ` Linus Torvalds
2015-03-12 13:10 ` Mel Gorman
2015-03-12 16:20 ` Linus Torvalds
2015-03-12 18:49 ` Mel Gorman
2015-03-17 7:06 ` Dave Chinner [this message]
2015-03-17 16:53 ` Linus Torvalds
2015-03-17 20:51 ` Dave Chinner
2015-03-17 21:30 ` Linus Torvalds
2015-03-17 22:08 ` Dave Chinner
2015-03-18 16:08 ` Linus Torvalds
2015-03-18 17:31 ` Linus Torvalds
2015-03-18 22:23 ` Dave Chinner
2015-03-19 14:10 ` Mel Gorman
2015-03-19 18:09 ` Linus Torvalds
2015-03-19 21:41 ` Linus Torvalds
2015-03-19 22:41 ` Dave Chinner
2015-03-19 23:05 ` Linus Torvalds
2015-03-19 23:23 ` Dave Chinner
2015-03-20 0:23 ` Dave Chinner
2015-03-20 1:29 ` Linus Torvalds
2015-03-20 4:13 ` Dave Chinner
2015-03-20 17:02 ` Linus Torvalds
2015-03-23 12:01 ` Mel Gorman
2015-03-20 10:12 ` Mel Gorman
2015-03-20 9:56 ` Mel Gorman
2015-03-08 20:40 ` Mel Gorman
2015-03-09 21:02 ` Mel Gorman
2015-03-10 13:08 ` Mel Gorman
2015-03-08 9:41 ` Ingo Molnar
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