From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265154AbTLaPqO (ORCPT ); Wed, 31 Dec 2003 10:46:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265156AbTLaPqO (ORCPT ); Wed, 31 Dec 2003 10:46:14 -0500 Received: from rat-5.inet.it ([213.92.5.95]:57219 "EHLO rat-5.inet.it") by vger.kernel.org with ESMTP id S265154AbTLaPqH (ORCPT ); Wed, 31 Dec 2003 10:46:07 -0500 From: Paolo Ornati To: William Lee Irwin III Subject: Re: 2.6.1-rc1 [resend] Date: Wed, 31 Dec 2003 16:45:23 +0100 User-Agent: KMail/1.5.2 References: <200312311619.27812.ornati@lycos.it> <20031231152052.GR27687@holomorphy.com> In-Reply-To: <20031231152052.GR27687@holomorphy.com> Cc: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200312311645.23348.ornati@lycos.it> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 31 December 2003 16:20, you wrote: > On Wednesday 31 December 2003 16:06, you wrote: > >> What io scheduler are you using? Or, could you post /var/log/dmesg? > > On Wed, Dec 31, 2003 at 04:19:27PM +0100, Paolo Ornati wrote: > > "dmesg" and "config" attached. > > Could you try this with elevator=deadline? ok, I have just tried... I don't see any big difference. The output of this script: _________________________________________________ #!/bin/bash echo "HD test for linux `uname -r`" echo ra=8 for i in `seq 7`; do echo "READAHEAD = $ra"; hdparm -a $ra /dev/hda; for j in `seq 3`; do hdparm -t /dev/hda; done; ra=$(($ra*2)); done _________________________________________________ is: _________________________________________________ HD test for linux 2.6.1-rc1 READAHEAD = 8 /dev/hda: setting fs readahead to 8 readahead = 8 (on) /dev/hda: Timing buffered disk reads: 64 MB in 4.79 seconds = 13.37 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 4.79 seconds = 13.36 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 4.79 seconds = 13.37 MB/sec READAHEAD = 16 /dev/hda: setting fs readahead to 16 readahead = 16 (on) /dev/hda: Timing buffered disk reads: 64 MB in 2.48 seconds = 25.80 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.45 seconds = 26.14 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.43 seconds = 26.30 MB/sec READAHEAD = 32 /dev/hda: setting fs readahead to 32 readahead = 32 (on) /dev/hda: Timing buffered disk reads: 64 MB in 2.44 seconds = 26.23 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.43 seconds = 26.32 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.44 seconds = 26.27 MB/sec READAHEAD = 64 /dev/hda: setting fs readahead to 64 readahead = 64 (on) /dev/hda: Timing buffered disk reads: 64 MB in 2.43 seconds = 26.38 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.44 seconds = 26.27 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.43 seconds = 26.36 MB/sec READAHEAD = 128 /dev/hda: setting fs readahead to 128 readahead = 128 (on) /dev/hda: Timing buffered disk reads: 64 MB in 2.43 seconds = 26.33 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.44 seconds = 26.20 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.42 seconds = 26.40 MB/sec READAHEAD = 256 /dev/hda: setting fs readahead to 256 readahead = 256 (on) /dev/hda: Timing buffered disk reads: 64 MB in 2.41 seconds = 26.56 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.41 seconds = 26.55 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.41 seconds = 26.54 MB/sec READAHEAD = 512 /dev/hda: setting fs readahead to 512 readahead = 512 (on) /dev/hda: Timing buffered disk reads: 64 MB in 2.41 seconds = 26.52 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.40 seconds = 26.67 MB/sec /dev/hda: Timing buffered disk reads: 64 MB in 2.41 seconds = 26.54 MB/sec _________________________________________________ > > > -- wli -- Paolo Ornati Linux v2.6.1-rc1