Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759930AbXEVGSa (ORCPT ); Tue, 22 May 2007 02:18:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756260AbXEVGSW (ORCPT ); Tue, 22 May 2007 02:18:22 -0400 Received: from d0618453.dreamhost.com ([208.97.132.83]:53558 "EHLO spaceymail-a3.g.dreamhost.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756187AbXEVGSV (ORCPT ); Tue, 22 May 2007 02:18:21 -0400 From: Anant Nitya Organization: Prachanda Hub To: linux-kernel@vger.kernel.org Subject: Re: bad networking related lag in v2.6.22-rc2 Date: Tue, 22 May 2007 11:47:55 +0530 User-Agent: KMail/1.9.6 Cc: Patrick McHardy , Ingo Molnar , Linus Torvalds , Andrew Morton , Thomas Gleixner , "David S. Miller" References: <20070517174533.GA538@elte.hu> <465208D2.6070409@trash.net> <46520F77.5000408@trash.net> In-Reply-To: <46520F77.5000408@trash.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200705221147.56571.kernel@prachanda.hub> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1621 Lines: 44 On Tuesday 22 May 2007 03:00:31 Patrick McHardy wrote: > Patrick McHardy wrote: > > Ingo Molnar wrote: > >>* Anant Nitya 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/