From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 21 Jan 2001 13:05:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 21 Jan 2001 13:04:46 -0500 Received: from roc-24-95-203-215.rochester.rr.com ([24.95.203.215]:30477 "EHLO d185fcbd7.rochester.rr.com") by vger.kernel.org with ESMTP id ; Sun, 21 Jan 2001 13:04:41 -0500 Date: Sun, 21 Jan 2001 13:09:53 -0500 From: Chris Mason To: Gregory Maxwell , Shawn Starr cc: linux-kernel@vger.kernel.org Subject: Re: Kernel 2.4.x and 2.4.1-preX - Higher latency then 2.2.x kernels? Message-ID: <186870000.980100593@tiny> In-Reply-To: <20010120145924.A22169@xi.linuxpower.cx> X-Mailer: Mulberry/2.0.6b1 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Saturday, January 20, 2001 02:59:24 PM -0500 Gregory Maxwell wrote: > On Sat, Jan 20, 2001 at 02:50:16PM -0500, Shawn Starr wrote: >> It just seems that since using 2.4 ive noticed my poor Pentium 200Mhz >> slow down whether being in X or otherwise. It just seems that the system >> is sluggish. >> >> I am using the new ReiserFS filesystem and I do know its still in heavy >> development perhaps my latency is due to this (?) > > Reiserfs uses much more complex data structures then ext2 (trees..). I > don't think that latency has ever been a design criteria and all of the > benchmarks they use are pretty much pure throughput tests. > > So it wouldn't be really surprising if reiserfs had very bad latency. You > should apply the timepegs patch and profile your kernel latency to see > where it's coming from. I'm actually very interested in fixing any latency problems. If you do these tests, please send the results along. -chris - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/