From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753467AbXJAMEr (ORCPT ); Mon, 1 Oct 2007 08:04:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751408AbXJAMEk (ORCPT ); Mon, 1 Oct 2007 08:04:40 -0400 Received: from usermail.globalproof.net ([194.146.153.18]:51153 "EHLO usermail.globalproof.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751291AbXJAMEj (ORCPT ); Mon, 1 Oct 2007 08:04:39 -0400 From: "Denys" To: Andi Kleen Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression Date: Mon, 1 Oct 2007 15:04:19 +0300 Message-Id: <20071001120231.M48591@nuclearcat.com> In-Reply-To: <20071001115721.GB17357@one.firstfloor.org> References: <20070930144443.M52139@visp.net.lb> <46FFE17C.9020202@cosmosbay.com> <200709301425.37564.nickpiggin@yahoo.com.au> <20070930220452.M25621@nuclearcat.com> <20071001103026.M59805@nuclearcat.com> <20071001111441.GA17357@one.firstfloor.org> <20071001114715.M51349@nuclearcat.com> <20071001115721.GB17357@one.firstfloor.org> X-Mailer: OpenWebMail 2.52 20060502 X-OriginatingIP: 194.146.154.161 (denys@visp.net.lb) MIME-Version: 1.0 Content-Type: text/plain; charset=koi8-r Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org That 2.6.21 works fine and 2.6.22 MUCH worse on multiple servers with similar workload. Plus all userspace becoming extremely unstable, and definitely ping 127.0.0.1 must not reach 300ms. On Mon, 1 Oct 2007 13:57:21 +0200, Andi Kleen wrote > On Mon, Oct 01, 2007 at 02:52:03PM +0300, Denys wrote: > > Hi > > > > No major differences. > > Some procedures higher a bit, some lower a bit, but everything looks fine on > > both kernels. > > > > Thats what i tried first - oprofile, and only one keypoint i was able to catch > > - in top softirqd/0 or /1 shows usage 100% cpu, and in mpstat - soft% also > > reaching 100%. > > Then you likely just have higher load. What makes you think this > is a kernel problem? > > -Andi -- Denys Fedoryshchenko Technical Manager Virtual ISP S.A.L.