linux-kernel - Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28

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Message-ID: <4926FB13.3080808@cosmosbay.com>
Date:	Fri, 21 Nov 2008 19:16:51 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...e.hu>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22
 -&gt; 2.6.28

Christoph Lameter a écrit :
> AIM9 results:
> 		TCP		UDP
> 2.6.22		104868.00	489970.03
> 2.6.28-rc5	110007.00	518640.00
> net-next	108207.00	514790.00
> 
> net-next looses here for some reason against 2.6.28-rc5. But the numbers
> are better than 2.6.22 in any case.
> 

I found that on current net-next, running oprofile in background can give better bench
results. Thats really curious... no ?


So the single loop on close(socket()), on all my 8 cpus is almost 10% faster if oprofile
is running... (20 secs instead of 23 secs)


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