Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754138AbXJAKBc (ORCPT ); Mon, 1 Oct 2007 06:01:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751354AbXJAKBZ (ORCPT ); Mon, 1 Oct 2007 06:01:25 -0400 Received: from mx2.suse.de ([195.135.220.15]:49600 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750876AbXJAKBZ (ORCPT ); Mon, 1 Oct 2007 06:01:25 -0400 To: "Denys" Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression References: <20070930144443.M52139@visp.net.lb> <46FFE17C.9020202@cosmosbay.com> <200709301425.37564.nickpiggin@yahoo.com.au> <20070930220452.M25621@nuclearcat.com> From: Andi Kleen Date: 01 Oct 2007 12:01:24 +0200 In-Reply-To: <20070930220452.M25621@nuclearcat.com> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 763 Lines: 12 "Denys" writes: > by mistake i will miss a point (it can detect bug easily, IF softirq in > mpstat 1 will jump up to 30+%. On 2.6.21 it is always staying +-10%, on > "buggy" version it jumps up to 100%. Now cause less load at night up to 30- > 50%, so on hardware it is not very noticeable (thats why maybe not much > feedbacks), i am trying to utilise hardware maximum as possible - so i feel > regressions much more. You could use oprofile to find where the CPU time is spent -Andi - 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/