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 12:54:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 28 Jan 2001 12:54:05 -0500 Received: from smtp-server.maine.rr.com ([204.210.65.66]:49341 "HELO smtp-server.maine.rr.com") by vger.kernel.org with SMTP id ; Sun, 28 Jan 2001 12:53:59 -0500 Message-ID: <002901c08951$f751bfa0$b001a8c0@caesar> From: "paradox3" To: "Bruce Harada" , In-Reply-To: <003f01c088fb$a35c06e0$b001a8c0@caesar> <20010128174016.3fba71ad.bruce@ask.ne.jp> Subject: Re: Poor SCSI drive performance on SMP machine, 2.2.16 Date: Sun, 28 Jan 2001 12:44:29 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I don't get any messages relating to the drives in any syslog output. ----- Original Message ----- From: "Bruce Harada" To: "paradox3" Cc: ; Sent: Sunday, January 28, 2001 3:40 AM Subject: Re: Poor SCSI drive performance on SMP machine, 2.2.16 > > 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/