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

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Date:	Tue, 22 May 2007 11:47:55 +0530
From:	Anant Nitya <kernel@...chanda.info>
To:	linux-kernel@...r.kernel.org
Cc:	Patrick McHardy <kaber@...sh.net>, 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 Tuesday 22 May 2007 03:00:31 Patrick McHardy wrote:
> Patrick McHardy wrote:
> > Ingo Molnar wrote:
> >>* Anant Nitya <kernel@...chanda.info> wrote:
> >>>I am posting links to the information you asked for. One more thing,
> >>>after digging a bit more I found its QoS shaping that is making the
> >>>box crawl. Once I disabled the traffic shaping everything comes back
> >>>to smooth and normal. Shaping being done on very low speed residential
> >>>ADSL 256/64 Kbps connection. If you want me to post shaping rules,
> >>>please free to ask. BTW its a simple HTB/SFQ rules.
> >>
> >>[...]
> >>
> >>>http://cybertek.info/taitai/trace-to-ingo.txt.bz2
> >>
> >>thanks! This trace indeed includes the smoking gun, htb_dequeue() and
> >>__qdisc_run():
> >>
> >>[..]
> >
> > This looks like fallout from the switch to hrtimers. Anant, please
> > send me your HTB script, I'll try to reproduce it.
>
> I think I already found the bug, please try if this patch helps.

Sorry, but this patch is not helping here. I recompiled the kernel with this 
patch but same load pattern still make system to crawl.

Here is the link for script I use to shape traffic.

http://cybertek.info/taitai/adslbwopt.sh

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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