From: Mike Galbraith <efault@gmx.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Lin Ming <ming.m.lin@intel.com>, Ingo Molnar <mingo@elte.hu>,
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: netperf ~50% regression with 2.6.33-rc1, bisect to 1b9508f
Date: Mon, 25 Jan 2010 15:19:39 +0100 [thread overview]
Message-ID: <1264429179.5881.9.camel@marge.simson.net> (raw)
In-Reply-To: <1264428229.4283.1833.camel@laptop>
On Mon, 2010-01-25 at 15:03 +0100, Peter Zijlstra wrote:
> On Mon, 2010-01-25 at 18:03 +0800, Lin Ming wrote:
> > Hi,
> >
> > The netperf lookback regression comes back again.
> > UDP stream test has ~50% regression with 2.6.33-rc1 compared to 2.6.32.
> >
> > Testing machine: Nehalem, 2 sockets, 4 cores, hyper thread, 4G mem
> > Server and client are bind to different physical cpu.
> >
> > taskset -c 15 ./netserver
> > taskset -c 0 ./netperf -t UDP_STREAM -l 60 -H 127.0.0.1 -i 50,3 -I 99,5
> > -- -P 12384,12888 -s 32768 -S 32768 -m 1024
>
> I cannot reproduce this on a dual socket nehalem system, I get current
> -linus to be about 10% faster than .32.
Nogo here too, but no nice HW here.
-Mike
prev parent reply other threads:[~2010-01-25 14:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-25 10:03 netperf ~50% regression with 2.6.33-rc1, bisect to 1b9508f Lin Ming
2010-01-25 11:35 ` Mike Galbraith
2010-01-25 11:45 ` Mike Galbraith
2010-01-26 9:03 ` Lin Ming
2010-01-25 14:03 ` Peter Zijlstra
2010-01-25 14:19 ` Mike Galbraith [this message]
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