Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754092AbYJEHQc (ORCPT ); Sun, 5 Oct 2008 03:16:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752416AbYJEHQX (ORCPT ); Sun, 5 Oct 2008 03:16:23 -0400 Received: from relay.2ka.mipt.ru ([194.85.80.65]:55723 "EHLO 2ka.mipt.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751734AbYJEHQW (ORCPT ); Sun, 5 Oct 2008 03:16:22 -0400 Date: Sun, 5 Oct 2008 11:14:26 +0400 From: Evgeniy Polyakov To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , Andrew Morton , Linus Torvalds , Natalie Protasevich , Kernel Testers List , Network Development Subject: Re: 2.6.27-rc8-git7: Reported regressions from 2.6.26 Message-ID: <20081005071421.GA17685@2ka.mipt.ru> References: <0pOgGB.A.uLG.E475IB@wind> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0pOgGB.A.uLG.E475IB@wind> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1778 Lines: 38 Hi. On Sat, Oct 04, 2008 at 07:28:42PM +0200, Rafael J. Wysocki (rjw@sisk.pl) wrote: > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11308 > Subject : tbench regression on each kernel release from 2.6.22 -> 2.6.28 > Submitter : Christoph Lameter > Date : 2008-08-11 18:36 (55 days old) > References : http://marc.info/?l=linux-kernel&m=121847986119495&w=4 > http://marc.info/?l=linux-kernel&m=122125737421332&w=4 Just for the reference, this one regresses from the 2.6.23. Particular 2.6.26-27 part can be partially fixed by disabling TSO/GSO, since tbench workload issues quite small packets, and system has no time to incorporate them into particulary big TSO/GSO frame to get advantage of this technology. The most noticeble perfromance drop was between 23 and 24 kernels. I work on this issue. > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11207 > Subject : VolanoMark regression with 2.6.27-rc1 > Submitter : Zhang, Yanmin > Date : 2008-07-31 3:20 (66 days old) > References : http://marc.info/?l=linux-kernel&m=121747464114335&w=4 > Handled-By : Zhang, Yanmin > Peter Zijlstra > Dhaval Giani > Miao Xie This one is different, but any other benchmark related to network over loopback (and in some case over other media) performance degradation should be very likely handled by the above case. -- Evgeniy Polyakov -- 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/