Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262602AbUC2EJr (ORCPT ); Sun, 28 Mar 2004 23:09:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262605AbUC2EJr (ORCPT ); Sun, 28 Mar 2004 23:09:47 -0500 Received: from zero.aec.at ([193.170.194.10]:62728 "EHLO zero.aec.at") by vger.kernel.org with ESMTP id S262602AbUC2EJq (ORCPT ); Sun, 28 Mar 2004 23:09:46 -0500 To: Andreas Hartmann cc: linux-kernel@vger.kernel.org Subject: Re: Very poor performance with 2.6.4 References: <1EOM0-3oS-17@gated-at.bofh.it> From: Andi Kleen Date: Mon, 29 Mar 2004 00:47:08 +0200 In-Reply-To: <1EOM0-3oS-17@gated-at.bofh.it> (Andreas Hartmann's message of "Sun, 28 Mar 2004 22:10:32 +0200") Message-ID: User-Agent: Gnus/5.110002 (No Gnus v0.2) Emacs/21.2 (gnu/linux) 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: 639 Lines: 19 Andreas Hartmann writes: > > Now, I switched off preemption. But the performance isn't much better: > 8.8% (9.3% with preemption) more real-time compared to 2.4.25 and 28% > (32.9% with preepmtion) more system-time. Install oprofile and do a profile run on the 2.6 kernel. This should tell you where the system time is wasted. Post the results on this list. -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/