From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270508AbTGNDGr (ORCPT ); Sun, 13 Jul 2003 23:06:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270510AbTGNDGr (ORCPT ); Sun, 13 Jul 2003 23:06:47 -0400 Received: from remt25.cluster1.charter.net ([209.225.8.35]:21235 "EHLO remt25.cluster1.charter.net") by vger.kernel.org with ESMTP id S270508AbTGNDGk (ORCPT ); Sun, 13 Jul 2003 23:06:40 -0400 From: Chris Morgan To: Doug McNaught Subject: Re: 2.5.XX very sluggish Date: Sun, 13 Jul 2003 23:21:26 -0400 User-Agent: KMail/1.5.2 Cc: linux-kernel@vger.kernel.org References: <200307131228.00155.cmorgan@alum.wpi.edu> In-Reply-To: MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200307132321.26835.cmorgan@alum.wpi.edu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Under 2.4.21: For my boot drive, ide: /dev/hdc2: multcount = 16 (on) IO_support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 2100/255/63, sectors = 32740470, start = 996030 For the scsi drives(2 drives in a raid 1 setup): /dev/sda: readonly = 0 (off) geometry = 17885/255/63, sectors = 287332384, start = 0 And some performance numbers, maybe these are helpful: /dev/md1: Timing buffer-cache reads: 128 MB in 0.60 seconds =213.33 MB/sec Timing buffered disk reads: 64 MB in 2.22 seconds = 28.83 MB/sec /dev/hdc: Timing buffer-cache reads: 128 MB in 0.56 seconds =228.57 MB/sec Timing buffered disk reads: 64 MB in 4.33 seconds = 14.78 MB/sec Under 2.5.75: /dev/hdc: multcount = 16 (on) IO_support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) geometry = 33483/16/63, sectors = 33750864, start = 0 These are with X running: /dev/hdc: Timing buffer-cache reads: 128 MB in 30.58 seconds = 4.19 MB/sec Timing buffered disk reads: 64 MB in 20.98 seconds = 3.05 MB/sec Hmm.. suspicious results: probably not enough free memory for a proper test. /dev/md1: Timing buffer-cache reads: 128 MB in 108.76 seconds = 1.18 MB/sec Timing buffered disk reads: 64 MB in 44.86 seconds = 1.43 MB/sec Hmm.. suspicious results: probably not enough free memory for a proper test. With X shutdown: /dev/hdc: Timing buffer-cache reads: 128 MB in 11.26 seconds = 11.36 MB/sec Timing buffered disk reads: 64 MB in 6.88 seconds = 9.30 MB/sec Hmm.. suspicious results: probably not enough free memory for a proper test. /dev/md1: Timing buffer-cache reads: 128 MB in 11.88 seconds = 10.77 MB/sec Timing buffered disk reads: 64 MB in 7.74 seconds = 8.27 MB/sec Hmm.. suspicious results: probably not enough free memory for a proper test. I'm running xf4.2.1 and the 'nv' driver. Any ideas as to what else I can look at? Thanks, Chris On Sunday 13 July 2003 12:45 pm, Doug McNaught wrote: > Chris Morgan writes: > > 1.4Ghz Athlon via 82cxx chipset, software raid 1 scsi drives, currently > > running 2.4.21 > > > > With 2.5.73/74/75(the only ones I've tried thus far) the kernel boots > > fine until it tries to mount the reiserfs partition on the raid1 set. > > Replaying the journal takes many times longer than with 2.4. Once it > > gets past that point the whole machine appears to be quite sluggish. Is > > this a known issue with reiserfs + software raid 1? What information > > would be useful to aid in debugging? > > What does 'hdparm' say about DMA settings on your drive under 2.5? > > -Doug