Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262420AbUC1UDt (ORCPT ); Sun, 28 Mar 2004 15:03:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262416AbUC1UDt (ORCPT ); Sun, 28 Mar 2004 15:03:49 -0500 Received: from p3EE062D5.dip0.t-ipconnect.de ([62.224.98.213]:11648 "EHLO susi.maya.org") by vger.kernel.org with ESMTP id S262415AbUC1UDl (ORCPT ); Sun, 28 Mar 2004 15:03:41 -0500 Message-ID: <40672F39.5040702@p3EE062D5.dip0.t-ipconnect.de> Date: Sun, 28 Mar 2004 22:02:01 +0200 From: Andreas Hartmann User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040212 X-Accept-Language: de, en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Very poor performance with 2.6.4 X-Enigmail-Version: 0.82.5.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2148 Lines: 57 Hello! I tested kernel 2.6.4. While compiling kdelibs and kdebase, I felt, that kernel 2.6 seems to be slower than 2.4.25. So I did some tests to compare the performance directly. Therefore I rebooted for everey test in init 2 (no X). I locally compiled 2.6.5rc2 3 times under 2.6.4 and under 2.4.25 on a reiserfs LVM partition, which resides onto a IDE HD (using DMA) and got the following result: In the middle, compiling under kernel 2.6.4 tooks 9.3% more real time than under 2.4.25. The user-processortime is about the same, but the system-processortime is under 2.6.4 32.9% higher than under 2.4.25. 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. Does anybody know, how to get the same performance under 2.6.4 (or even better) as under 2.4.25? My hardware: AMD Athlon(tm) XP 2000+ 00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333] 00:01.0 PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333 AGP] 00:09.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 10/100 Ethernet (rev 02) 00:0c.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0c) 00:10.0 USB Controller: VIA Technologies, Inc. USB (rev 80) 00:10.1 USB Controller: VIA Technologies, Inc. USB (rev 80) 00:10.2 USB Controller: VIA Technologies, Inc. USB (rev 80) 00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82) 00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge 00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06) 00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235 AC97 Audio Controller (rev 50) 01:00.0 VGA compatible controller: ATI Technologies Inc Rage 128 PF/PRO AGP 4x TMDS Regards, Andreas Hartmann - 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/