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, 28 Jan 2001 03:40:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 28 Jan 2001 03:40:49 -0500 Received: from kashiwa8-10.ppp-1.dion.ne.jp ([210.157.148.10]:36881 "EHLO ask.ne.jp") by vger.kernel.org with ESMTP id ; Sun, 28 Jan 2001 03:40:38 -0500 Date: Sun, 28 Jan 2001 17:40:16 +0900 From: Bruce Harada To: "paradox3" Cc: linux-kernel@vger.kernel.org, linux-smp@vger.kernel.org Subject: Re: Poor SCSI drive performance on SMP machine, 2.2.16 Message-Id: <20010128174016.3fba71ad.bruce@ask.ne.jp> In-Reply-To: <003f01c088fb$a35c06e0$b001a8c0@caesar> In-Reply-To: <003f01c088fb$a35c06e0$b001a8c0@caesar> X-Mailer: Sylpheed version 0.4.9 (GTK+ 1.2.6; Linux 2.2.17; i686) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi. Do you get messages like the ones below in /var/log/messages? sym53c875-0-<0,0>: QUEUE FULL! 8 busy, 7 disconnected CCBs sym53c875-0-<0,0>: tagged command queue depth set to 7 In fact, do you get any messages in your log files that look like they might be related? -- Bruce Harada bruce@ask.ne.jp On Sun, 28 Jan 2001 02:26:32 -0500 "paradox3" wrote: > I have an SMP machine (dual PII 400s) running 2.2.16 with one 10,000 RPM > IBM > 10 GB SCSI drive > (AIC 7890 on motherboard, using aic7xxx.o), and four various IDE drives. > The > SCSI drive > performs the worst. In tests of writing 100 MB and sync'ing, one of my > IDE > drives takes 31 seconds. The SCSI drive (while doing nothing else) took > 2 minutes, 10 seconds. This is extremely noticable in file transfers > that > completely > monopolize the SCSI drive, and are much slower than when involving the > IDE > drives. > After a large data operation on the SCSI drive, the system will hang for > several minutes. > Anyone know what could be causing this? Thanks. > > Attached are some data to help. > > > Thanks, > Para-dox (paradox3@maine.rr.com) > > - 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/