From: Linus Torvalds <torvalds@linux-foundation.org>
To: ying.huang@intel.com
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Michal Hocko <mhocko@suse.com>,
s.priebe@profihost.ag, mgorman@techsingularity.net,
Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
alex.williamson@redhat.com, lkp@01.org, rientjes@google.com,
kirill@shutemov.name, Andrew Morton <akpm@linux-foundation.org>,
zi.yan@cs.rutgers.edu, Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression
Date: Wed, 28 Nov 2018 08:48:46 -0800 [thread overview]
Message-ID: <CAHk-=wjgRO-=NPaU9EmrdC3it3o7kvf4u7sewv3crtNLkE13Hg@mail.gmail.com> (raw)
In-Reply-To: <87tvk1yjkp.fsf@yhuang-dev.intel.com>
On Tue, Nov 27, 2018 at 7:20 PM Huang, Ying <ying.huang@intel.com> wrote:
>
> From the above data, for the parent commit 3 processes exited within
> 14s, another 3 exited within 100s. For this commit, the first process
> exited at 203s. That is, this commit makes memory allocation more fair
> among processes, so that processes proceeded at more similar speed. But
> this raises system memory footprint too, so triggered much more swap,
> thus lower benchmark score.
>
> In general, memory allocation fairness among processes should be a good
> thing. So I think the report should have been a "performance
> improvement" instead of "performance regression".
Hey, when you put it that way...
Let's ignore this issue for now, and see if it shows up in some real
workload and people complain.
Linus
WARNING: multiple messages have this Message-ID (diff)
From: Linus Torvalds <torvalds@linux-foundation.org>
To: lkp@lists.01.org
Subject: Re: [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression
Date: Wed, 28 Nov 2018 08:48:46 -0800 [thread overview]
Message-ID: <CAHk-=wjgRO-=NPaU9EmrdC3it3o7kvf4u7sewv3crtNLkE13Hg@mail.gmail.com> (raw)
In-Reply-To: <87tvk1yjkp.fsf@yhuang-dev.intel.com>
[-- Attachment #1: Type: text/plain, Size: 844 bytes --]
On Tue, Nov 27, 2018 at 7:20 PM Huang, Ying <ying.huang@intel.com> wrote:
>
> From the above data, for the parent commit 3 processes exited within
> 14s, another 3 exited within 100s. For this commit, the first process
> exited at 203s. That is, this commit makes memory allocation more fair
> among processes, so that processes proceeded at more similar speed. But
> this raises system memory footprint too, so triggered much more swap,
> thus lower benchmark score.
>
> In general, memory allocation fairness among processes should be a good
> thing. So I think the report should have been a "performance
> improvement" instead of "performance regression".
Hey, when you put it that way...
Let's ignore this issue for now, and see if it shows up in some real
workload and people complain.
Linus
next prev parent reply other threads:[~2018-11-28 16:49 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 ` Linus Torvalds [this message]
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 ` [LKP] " David Rientjes
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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