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Groups > linux.kernel > #1428765
| From | Jirka Hladky <jhladky@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel |
| Date | 2016-06-22 14:50 +0200 |
| Message-ID | <rMPLr-3pV-7@gated-at.bofh.it> (permalink) |
| References | (4 earlier) <rMLeO-AU-13@gated-at.bofh.it> <rMLeO-AU-19@gated-at.bofh.it> <rMNgC-221-17@gated-at.bofh.it> <rMOml-2Gn-7@gated-at.bofh.it> <rMPBM-3lU-27@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
OK, I have reviewed my results once again: This commit is fine: 64b7aad - Ingo Molnar, 7 weeks ago : Merge branch 'sched/urgent' into sched/core, to pick up fixes before applying new changes This version has already a problem: 2159197 - Peter Zijlstra, 8 weeks ago : sched/core: Enable increased load resolution on 64-bit kernels git bisect start git bisect good 64b7aad git bisect bad 2159197 Bisecting: 1 revision left to test after this (roughly 1 step) [eb58075149b7f0300ff19142e6245fe75db2a081] sched/core: Introduce 'struct rq_flags' I should have results pretty soon. Jirka On Wed, Jun 22, 2016 at 2:37 PM, Jirka Hladky <jhladky@redhat.com> wrote: > Hi Peter, > > crap - I have done bisecting manually (not using git bisect) and I > have probably done some mistake. > > Commits (git checkout <commit>) for which I got BAD results: > > 2159197d66770ec01f75c93fb11dc66df81fd45b > 6ecdd74962f246dfe8750b7bea481a1c0816315d > > Commits (git checkout <commit>) for which I got GOOD results: > 21e96f88776deead303ecd30a17d1d7c2a1776e3 > 64b7aad5798478ffff52e110878ccaae4c3aaa34 > e7904a28f5331c21d17af638cb477c83662e3cb6 > > I will try to use git bisect now. >  > Jirka > > On Wed, Jun 22, 2016 at 1:12 PM, Peter Zijlstra <peterz@infradead.org> wrote: >> On Wed, Jun 22, 2016 at 11:52:45AM +0200, Jirka Hladky wrote: >>> Hi Peter, >>> >>> the performance regression has been caused by this commit >>> >>> ================================================= >>> commit 6ecdd74962f246dfe8750b7bea481a1c0816315d >>> Author: Yuyang Du <yuyang.du@intel.com> >>> Date: Tue Apr 5 12:12:26 2016 +0800 >>> >>> sched/fair: Generalize the load/util averages resolution definition >>> ================================================= >>> >>> Could you please have a look? >> >> That patch looks like a NO-OP to me. >> >> In any case, the good news it that I can run the benchmark, the bad news >> is that the patch you fingered doesn't appear to be it. >> >> >> v4.60: >> ./4.6.0/2016-Jun-22_11h11m07s.log:Score on xml.transform: 2007.18 ops/m >> ./4.6.0/2016-Jun-22_11h11m07s.log:Score on xml.validation: 2999.44 ops/m >> >> tip/master: >> ./4.7.0-rc4-00345-gf6e78bb/2016-Jun-22_11h30m27s.log:Score on xml.transform: 1283.14 ops/m >> ./4.7.0-rc4-00345-gf6e78bb/2016-Jun-22_11h30m27s.log:Score on xml.validation: 2008.62 ops/m >> >> patch^1 >> ./4.6.0-rc5-00034-g2159197/2016-Jun-22_12h38m50s.log:Score on xml.transform: 1196.18 ops/m >> ./4.6.0-rc5-00034-g2159197/2016-Jun-22_12h38m50s.log:Score on xml.validation: 2055.11 ops/m >> >> patch^1 + patch >> ./4.6.0-rc5-00034-g2159197-dirty/2016-Jun-22_12h55m43s.log:Score on xml.transform: 1294.59 ops/m >> ./4.6.0-rc5-00034-g2159197-dirty/2016-Jun-22_12h55m43s.log:Score on xml.validation: 2140.02 ops/m >> >>
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Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-16 18:40 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-16 19:30 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-17 01:10 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-21 15:30 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 09:20 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 10:00 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 10:00 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 12:10 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 13:20 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 14:40 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 14:50 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 16:50 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 23:00 +0200
Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 10:30 +0200
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