From: Nick Piggin <piggin@cyberone.com.au>
To: Andrew Morton <akpm@osdl.org>
Cc: rml@tech9.net, jyau_kernel_dev@hotmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Minor scheduler fix to get rid of skipping in xmms
Date: Sun, 07 Sep 2003 16:29:18 +1000 [thread overview]
Message-ID: <3F5AD03E.5070506@cyberone.com.au> (raw)
In-Reply-To: <20030906231856.6282cd44.akpm@osdl.org>
Andrew Morton wrote:
>Nick Piggin <piggin@cyberone.com.au> wrote:
>
>>So it is quite sad that the scheduler in 2.6 is
>> sitting there doing nothing but waiting to be obsoleted, while Con's
>> good (and begnin) scheduler patches are waiting around and getting
>> less than 1% of the testing they need.
>>
>
>My concern is the (large) performance regression with specjbb and
>volanomark, due to increased idle time.
>
>We cannot just jam all this code into Linus's tree while crossing our
>fingers and hoping that something will turn up to fix this problem.
>Because we don't know what causes it, nor whether we even _can_ fix it.
>
>So this is the problem which everyone who is working on the CPU scheduler
>should be concentrating on, please.
>
IIRC my (equivalent to Andrew's CAN_MIGRATE) patch fixed this. There was
still a small (~8%?) performance regression, but idle times were on par
with -linus. I don't have easy access to a largeish NUMA box, so I
can't do much more.
next prev parent reply other threads:[~2003-09-07 6:29 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-06 9:46 [PATCH] Minor scheduler fix to get rid of skipping in xmms John Yau
2003-09-06 10:03 ` Michael Buesch
2003-09-06 17:01 ` Robert Love
2003-09-06 17:59 ` John Yau
2003-09-06 18:17 ` John Yau
2003-09-06 19:42 ` Rahul Karnik
2003-09-06 20:04 ` Robert Love
2003-09-06 22:41 ` John Yau
2003-09-07 2:40 ` Martin J. Bligh
2003-09-07 5:13 ` Nick Piggin
2003-09-07 7:48 ` Johnny Yau
2003-09-07 8:10 ` Nick Piggin
2003-09-07 8:35 ` John Yau
2003-09-07 9:26 ` Nick Piggin
2003-09-07 17:30 ` John Yau
2003-09-07 17:36 ` Nick Piggin
2003-09-08 0:22 ` Con Kolivas
2003-09-08 0:27 ` David Lang
2003-09-08 0:47 ` Con Kolivas
2003-09-07 5:08 ` Nick Piggin
2003-09-07 6:18 ` Andrew Morton
2003-09-07 6:29 ` Nick Piggin [this message]
2003-09-07 6:45 ` Andrew Morton
2003-09-07 6:59 ` Nick Piggin
2003-09-07 7:02 ` Nick Piggin
2003-09-07 14:32 ` Martin J. Bligh
2003-09-07 17:02 ` Robert Love
2003-09-07 17:34 ` Andrew Morton
2003-09-07 18:12 ` Nick Piggin
2003-09-07 18:13 ` Nick Piggin
-- strict thread matches above, loose matches on Subject: below --
2003-09-06 15:58 John Yau
2003-09-06 16:57 ` Michael Buesch
2003-09-08 22:27 Steven Pratt
2003-09-08 22:56 ` Andrew Morton
2003-09-08 23:22 ` William Lee Irwin III
2003-09-09 2:10 ` Con Kolivas
2003-09-09 2:16 ` Con Kolivas
2003-09-09 2:31 ` Con Kolivas
2003-09-09 2:33 ` Andrew Morton
2003-09-09 4:14 ` Nick Piggin
2003-09-09 6:49 ` Con Kolivas
2003-09-09 23:53 ` Cliff White
2003-09-10 2:12 ` Nick Piggin
2003-09-10 19:05 ` Steven Pratt
2003-09-10 20:23 ` Dave Hansen
[not found] ` <3F5FE385.10204@cyberone.com.au>
[not found] ` <3F607E62.3010903@austin.ibm.com>
[not found] ` <3F60873B.4000005@cyberone.com.au>
2003-09-11 22:57 ` Steven Pratt
2003-09-11 0:14 ` Cliff White
2003-09-09 22:06 ` Steven Pratt
2003-09-09 22:12 ` Andrew Morton
2003-09-10 13:59 ` Steven Pratt
2003-09-10 18:51 ` Steven Pratt
[not found] <tCPY.4xU.1@gated-at.bofh.it>
[not found] ` <tDsR.5tY.31@gated-at.bofh.it>
[not found] ` <tZ0f.49P.5@gated-at.bofh.it>
[not found] ` <tZjz.4Bn.7@gated-at.bofh.it>
2003-09-09 23:24 ` David Mosberger-Tang
2003-09-11 2:55 Andrew Theurer
2003-09-11 11:04 ` Nick Piggin
2003-09-11 13:05 ` Andrew Theurer
2003-09-11 13:53 ` Nick Piggin
2003-09-11 14:37 ` Andrew Theurer
2003-09-11 23:32 Craig Thomas
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