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From: Rick Jones <rick.jones2@hp.com>
To: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>, netdev@vger.kernel.org
Subject: Re: Netperf TCP_RR(loopback) 10% regression in 2.6.24-rc6,	comparing with 2.6.22
Date: Fri, 11 Jan 2008 09:56:42 -0800	[thread overview]
Message-ID: <4787ADDA.7090602@hp.com> (raw)
In-Reply-To: <1200043854.3265.24.camel@ymzhang>

>>The test command is:
>>#sudo taskset -c 7 ./netserver
>>#sudo taskset -c 0 ./netperf -t TCP_RR -l 60 -H 127.0.0.1 -i 50,3 -I 99,5 -- -r 1,1

A couple of comments/questions on the command lines:

*) netperf/netserver support CPU affinity within themselves with the 
global -T option to netperf.  Is the result with taskset much different? 
   The equivalent to the above would be to run netperf with:

./netperf -T 0,7 ...

The one possibly salient difference between the two is that when done 
within netperf, the initial process creation will take place wherever 
the scheduler wants it.

*) The -i option to set the confidence iteration count will silently cap 
the max at 30.

happy benchmarking,

rick jones

  reply	other threads:[~2008-01-11 17:56 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-09  9:35 Zhang, Yanmin
2008-01-09 11:48 ` David Miller
2008-01-11  9:30 ` Zhang, Yanmin
2008-01-11 17:56   ` Rick Jones [this message]
2008-01-14  3:11     ` Zhang, Yanmin
2008-01-14 17:46       ` Rick Jones
2008-01-14  8:44   ` Ilpo Järvinen
2008-01-14  9:21     ` Ilpo Järvinen
2008-01-14  9:38       ` Zhang, Yanmin
2008-01-14 10:53     ` Herbert Xu
2008-01-16  0:34       ` Zhang, Yanmin
2008-01-16  7:15         ` Zhang, Yanmin

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