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From: Peter Zijlstra <peterz@infradead.org>
To: Jirka Hladky <jhladky@redhat.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
	Kamil Kolakowski <kkolakow@redhat.com>
Subject: Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel
Date: Wed, 22 Jun 2016 13:12:46 +0200	[thread overview]
Message-ID: <20160622111246.GE30154@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAE4VaGACT2XO4woXaHRbPi6bpkovr33oSVBrHqTimNgodSLtug@mail.gmail.com>

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

  reply	other threads:[~2016-06-22 11:13 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-16 16:38 Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky
2016-06-16 17:22 ` Peter Zijlstra
2016-06-16 23:04   ` Jirka Hladky
2016-06-21 13:17     ` Jirka Hladky
2016-06-22  7:16     ` Peter Zijlstra
2016-06-22  7:49       ` Peter Zijlstra
2016-06-22  7:54         ` Peter Zijlstra
2016-06-22  9:52           ` Jirka Hladky
2016-06-22 11:12             ` Peter Zijlstra [this message]
2016-06-22 12:37               ` Jirka Hladky
2016-06-22 12:46                 ` Jirka Hladky
2016-06-22 14:41                   ` Jirka Hladky
2016-06-22 20:59                     ` Peter Zijlstra
2016-06-22  8:20       ` Jirka Hladky
2016-06-23 18:33     ` Peter Zijlstra
2016-06-23 18:43       ` Peter Zijlstra
2016-06-24  7:44         ` Jirka Hladky
2016-06-24  8:08           ` Peter Zijlstra
2016-06-24  8:20             ` Jirka Hladky
2016-06-24 12:02           ` Peter Zijlstra
2016-06-24 12:09             ` Jirka Hladky
2016-06-24 12:30               ` Peter Zijlstra
2016-06-24 12:35               ` Jirka Hladky
2016-06-24 12:44             ` Vincent Guittot
2016-06-24 13:08               ` Jirka Hladky
2016-06-24 13:09               ` Peter Zijlstra
2016-06-24 13:23                 ` Vincent Guittot
2016-06-24 13:33                   ` Peter Zijlstra
2016-06-24 13:45                   ` Peter Zijlstra
2016-06-24 13:42               ` Peter Zijlstra
2016-06-24 15:54                 ` Peter Zijlstra
2016-06-24 22:13                   ` Jirka Hladky
2016-06-22  7:37 Branimir Maksimovic
2016-06-22  8:25 ` Jirka Hladky

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