linux-kernel - Re: bad networking related lag in v2.6.22-rc2

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Message-Id: <200705221150.35774.kernel@prachanda.hub>
Date:	Tue, 22 May 2007 11:50:34 +0530
From:	Anant Nitya <kernel@...chanda.info>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: bad networking related lag in v2.6.22-rc2

On Monday 21 May 2007 15:50:09 Ingo Molnar wrote:
> * Anant Nitya <kernel@...chanda.info> wrote:
> > Tcp:
> >     5 connections established
>
> hm, this does not explain the /proc/net/tcp overhead i think - although
> it could be a red herring. Will have a closer look at your new trace.
>
> if possible please try to generate the automatic softirq trace for
> Thomas, and then a separate trace for the firefox/net-lag thing, using
> trace-it-10sec.c. Btw., for the second trace, could you boot with
> maxcpus=1? That would make the second trace quite a bit more
> straightforward to analyze. You probably need both cpus to trigger the
> softirq problem.
>
> 	Ingo

here is the link for new trace with maxcpus=1.
http://cybertek.info/taitai/trace-it-10sec-to-ingo-with-maxcpus=1.bz2

Regards
Ananitya

-- 
Out of many thousands, one may endeavor for perfection, and of
those who have achieved perfection, hardly one knows Me in truth.
				-- Gita Sutra Of Mysticism
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