From: David Rientjes <rientjes@google.com>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>,
Andrea Arcangeli <aarcange@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Michal Hocko <mhocko@kernel.org>,
ying.huang@intel.com, s.priebe@profihost.ag,
Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
alex.williamson@redhat.com, lkp@01.org, kirill@shutemov.name,
Andrew Morton <akpm@linux-foundation.org>,
zi.yan@cs.rutgers.edu
Subject: Re: [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression
Date: Fri, 21 Dec 2018 14:15:05 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.21.1812211413460.219499@chino.kir.corp.google.com> (raw)
In-Reply-To: <20181214231147.GF29005@techsingularity.net>
On Fri, 14 Dec 2018, Mel Gorman wrote:
> > In other words, I think there is a lot of potential stranding that occurs
> > for both scanners that could otherwise result in completely free
> > pageblocks. If there a single movable page present near the end of the
> > zone in an otherwise fully free pageblock, surely we can do better than
> > the current implementation that would never consider this very easy to
> > compact memory.
> >
>
> While it's somewhat premature, I posted a series before I had a full set
> of results because it uses free lists to reduce searches and reduces
> inference between multiple scanners. Preliminary results indicated it
> boosted allocation success rates by 20%ish, reduced migration scanning
> by 99% and free scanning by 27%.
>
Always good to have code to look at, I'll take a closer look. I've
unfortunately been distracted with other kernel issues lately :/
WARNING: multiple messages have this Message-ID (diff)
From: David Rientjes <rientjes@google.com>
To: lkp@lists.01.org
Subject: Re: [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression
Date: Fri, 21 Dec 2018 14:15:05 -0800 [thread overview]
Message-ID: <alpine.DEB.2.21.1812211413460.219499@chino.kir.corp.google.com> (raw)
In-Reply-To: <20181214231147.GF29005@techsingularity.net>
[-- Attachment #1: Type: text/plain, Size: 930 bytes --]
On Fri, 14 Dec 2018, Mel Gorman wrote:
> > In other words, I think there is a lot of potential stranding that occurs
> > for both scanners that could otherwise result in completely free
> > pageblocks. If there a single movable page present near the end of the
> > zone in an otherwise fully free pageblock, surely we can do better than
> > the current implementation that would never consider this very easy to
> > compact memory.
> >
>
> While it's somewhat premature, I posted a series before I had a full set
> of results because it uses free lists to reduce searches and reduces
> inference between multiple scanners. Preliminary results indicated it
> boosted allocation success rates by 20%ish, reduced migration scanning
> by 99% and free scanning by 27%.
>
Always good to have code to look at, I'll take a closer look. I've
unfortunately been distracted with other kernel issues lately :/
next prev parent reply other threads:[~2018-12-21 22:15 UTC|newest]
Thread overview: 154+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 6:25 [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression kernel test robot
2018-11-27 6:25 ` kernel test robot
2018-11-27 17:08 ` [LKP] " Linus Torvalds
2018-11-27 17:08 ` Linus Torvalds
2018-11-27 18:17 ` [LKP] " Michal Hocko
2018-11-27 18:17 ` Michal Hocko
2018-11-27 18:21 ` [LKP] " Michal Hocko
2018-11-27 18:21 ` Michal Hocko
2018-11-27 19:05 ` [LKP] " Vlastimil Babka
2018-11-27 19:05 ` Vlastimil Babka
2018-11-27 19:16 ` [LKP] " Vlastimil Babka
2018-11-27 19:16 ` Vlastimil Babka
2018-11-27 20:57 ` [LKP] " Andrea Arcangeli
2018-11-27 20:57 ` Andrea Arcangeli
2018-11-27 22:50 ` [LKP] " Linus Torvalds
2018-11-27 22:50 ` Linus Torvalds
2018-11-28 6:30 ` [LKP] " Michal Hocko
2018-11-28 6:30 ` Michal Hocko
2018-11-28 3:20 ` [LKP] " Huang, Ying
2018-11-28 3:20 ` Huang, Ying
2018-11-28 16:48 ` [LKP] " Linus Torvalds
2018-11-28 16:48 ` Linus Torvalds
2018-11-28 18:39 ` [LKP] " Andrea Arcangeli
2018-11-28 18:39 ` Andrea Arcangeli
2018-11-28 23:10 ` [LKP] " David Rientjes
2018-11-28 23:10 ` David Rientjes
2018-12-03 18:01 ` [LKP] " Linus Torvalds
2018-12-03 18:01 ` Linus Torvalds
2018-12-03 18:14 ` [LKP] " Michal Hocko
2018-12-03 18:14 ` Michal Hocko
2018-12-03 18:19 ` [LKP] " Linus Torvalds
2018-12-03 18:19 ` Linus Torvalds
2018-12-03 18:30 ` [LKP] " Michal Hocko
2018-12-03 18:30 ` Michal Hocko
2018-12-03 18:45 ` [LKP] " Linus Torvalds
2018-12-03 18:45 ` Linus Torvalds
2018-12-03 18:59 ` [LKP] " Michal Hocko
2018-12-03 18:59 ` Michal Hocko
2018-12-03 19:23 ` [LKP] " Andrea Arcangeli
2018-12-03 19:23 ` Andrea Arcangeli
2018-12-03 20:26 ` [LKP] " David Rientjes
2018-12-03 20:26 ` David Rientjes
2018-12-03 19:28 ` [LKP] " Linus Torvalds
2018-12-03 19:28 ` Linus Torvalds
2018-12-03 20:12 ` [LKP] " Andrea Arcangeli
2018-12-03 20:12 ` Andrea Arcangeli
2018-12-03 20:36 ` [LKP] " David Rientjes
2018-12-03 20:36 ` David Rientjes
2018-12-03 22:04 ` [LKP] " Linus Torvalds
2018-12-03 22:04 ` Linus Torvalds
2018-12-03 22:27 ` [LKP] " Linus Torvalds
2018-12-03 22:27 ` Linus Torvalds
2018-12-03 22:57 ` [LKP] " David Rientjes
2018-12-03 22:57 ` David Rientjes
2018-12-04 9:22 ` [LKP] " Vlastimil Babka
2018-12-04 9:22 ` Vlastimil Babka
2018-12-04 10:45 ` [LKP] " Mel Gorman
2018-12-04 10:45 ` Mel Gorman
2018-12-05 0:47 ` [LKP] " David Rientjes
2018-12-05 0:47 ` David Rientjes
2018-12-05 9:08 ` [LKP] " Michal Hocko
2018-12-05 9:08 ` Michal Hocko
2018-12-05 10:43 ` [LKP] " Mel Gorman
2018-12-05 10:43 ` Mel Gorman
2018-12-05 11:43 ` [LKP] " Michal Hocko
2018-12-05 11:43 ` Michal Hocko
2018-12-05 10:06 ` [LKP] " Mel Gorman
2018-12-05 10:06 ` Mel Gorman
2018-12-05 20:40 ` [LKP] " Andrea Arcangeli
2018-12-05 20:40 ` Andrea Arcangeli
2018-12-05 21:59 ` [LKP] " David Rientjes
2018-12-05 21:59 ` David Rientjes
2018-12-06 0:00 ` [LKP] " Andrea Arcangeli
2018-12-06 0:00 ` Andrea Arcangeli
2018-12-05 22:03 ` [LKP] " Linus Torvalds
2018-12-05 22:03 ` Linus Torvalds
2018-12-05 22:12 ` [LKP] " David Rientjes
2018-12-05 22:12 ` David Rientjes
2018-12-05 23:36 ` [LKP] " Andrea Arcangeli
2018-12-05 23:36 ` Andrea Arcangeli
2018-12-05 23:51 ` [LKP] " Linus Torvalds
2018-12-05 23:51 ` Linus Torvalds
2018-12-06 0:58 ` [LKP] " Linus Torvalds
2018-12-06 0:58 ` Linus Torvalds
2018-12-06 9:14 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression) Michal Hocko
2018-12-06 9:14 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Michal Hocko
2018-12-06 23:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " David Rientjes
2018-12-06 23:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: " David Rientjes
2018-12-07 7:34 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Michal Hocko
2018-12-07 7:34 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Michal Hocko
2018-12-07 4:31 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Linus Torvalds
2018-12-07 4:31 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Linus Torvalds
2018-12-07 7:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Michal Hocko
2018-12-07 7:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Michal Hocko
2018-12-07 9:06 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Vlastimil Babka
2018-12-07 9:06 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Vlastimil Babka
2018-12-07 23:15 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " David Rientjes
2018-12-07 23:15 ` MADV_HUGEPAGE vs. NUMA semantic (was: " David Rientjes
2018-12-06 23:43 ` [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression David Rientjes
2018-12-06 23:43 ` David Rientjes
2018-12-07 4:01 ` [LKP] " Linus Torvalds
2018-12-07 4:01 ` Linus Torvalds
2018-12-10 0:29 ` [LKP] " David Rientjes
2018-12-10 0:29 ` David Rientjes
2018-12-10 4:49 ` [LKP] " Andrea Arcangeli
2018-12-10 4:49 ` Andrea Arcangeli
2018-12-12 0:37 ` [LKP] " David Rientjes
2018-12-12 0:37 ` David Rientjes
2018-12-12 9:50 ` [LKP] " Michal Hocko
2018-12-12 9:50 ` Michal Hocko
2018-12-12 17:00 ` [LKP] " Andrea Arcangeli
2018-12-12 17:00 ` Andrea Arcangeli
2018-12-14 11:32 ` [LKP] " Michal Hocko
2018-12-14 11:32 ` Michal Hocko
2018-12-12 10:14 ` [LKP] " Vlastimil Babka
2018-12-12 10:14 ` Vlastimil Babka
2018-12-14 21:04 ` [LKP] " David Rientjes
2018-12-14 21:04 ` David Rientjes
2018-12-14 21:33 ` [LKP] " Vlastimil Babka
2018-12-14 21:33 ` Vlastimil Babka
2018-12-21 22:18 ` [LKP] " David Rientjes
2018-12-21 22:18 ` David Rientjes
2018-12-21 22:18 ` [LKP] " David Rientjes
2018-12-22 12:08 ` Mel Gorman
2018-12-22 12:08 ` Mel Gorman
2018-12-14 23:11 ` [LKP] " Mel Gorman
2018-12-14 23:11 ` Mel Gorman
2018-12-21 22:15 ` David Rientjes [this message]
2018-12-21 22:15 ` David Rientjes
2018-12-12 10:44 ` [LKP] " Andrea Arcangeli
2018-12-12 10:44 ` Andrea Arcangeli
2019-04-15 11:48 ` [LKP] " Michal Hocko
2019-04-15 11:48 ` Michal Hocko
2018-12-06 0:18 ` [LKP] " David Rientjes
2018-12-06 0:18 ` David Rientjes
2018-12-06 0:54 ` [LKP] " Andrea Arcangeli
2018-12-06 0:54 ` Andrea Arcangeli
2018-12-06 9:23 ` [LKP] " Vlastimil Babka
2018-12-06 9:23 ` Vlastimil Babka
2018-12-03 20:39 ` [LKP] " David Rientjes
2018-12-03 20:39 ` David Rientjes
2018-12-03 21:25 ` [LKP] " Michal Hocko
2018-12-03 21:25 ` Michal Hocko
2018-12-03 21:53 ` [LKP] " David Rientjes
2018-12-03 21:53 ` David Rientjes
2018-12-04 8:48 ` [LKP] " Michal Hocko
2018-12-04 8:48 ` Michal Hocko
2018-12-05 0:07 ` [LKP] " David Rientjes
2018-12-05 0:07 ` David Rientjes
2018-12-05 10:18 ` [LKP] " Michal Hocko
2018-12-05 10:18 ` Michal Hocko
2018-12-05 19:16 ` [LKP] " David Rientjes
2018-12-05 19:16 ` David Rientjes
2018-11-27 7:23 [LKP] " kernel test robot
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