From owner-freebsd-smp Fri Jan 11 4:39:42 2002 Delivered-To: freebsd-smp@freebsd.org Received: from rwcrmhc52.attbi.com (rwcrmhc52.attbi.com [216.148.227.88]) by hub.freebsd.org (Postfix) with ESMTP id C513537B41B; Fri, 11 Jan 2002 04:39:34 -0800 (PST) Received: from peter3.wemm.org ([12.232.27.13]) by rwcrmhc52.attbi.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id <20020111123929.YGRC3578.rwcrmhc52.attbi.com@peter3.wemm.org>; Fri, 11 Jan 2002 12:39:29 +0000 Received: from overcee.netplex.com.au (overcee.wemm.org [10.0.0.3]) by peter3.wemm.org (8.11.0/8.11.0) with ESMTP id g0BCdTs66060; Fri, 11 Jan 2002 04:39:29 -0800 (PST) (envelope-from peter@wemm.org) Received: from wemm.org (localhost [127.0.0.1]) by overcee.netplex.com.au (Postfix) with ESMTP id 2536138FD; Fri, 11 Jan 2002 04:39:29 -0800 (PST) (envelope-from peter@wemm.org) X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 To: Chris Faulhaber Cc: scottl@FreeBSD.org, smp@FreeBSD.org Subject: Re: P5 vs. SMP, part 2 In-Reply-To: <20020108000825.GA60374@peitho.fxp.org> Date: Fri, 11 Jan 2002 04:39:29 -0800 From: Peter Wemm Message-Id: <20020111123929.2536138FD@overcee.netplex.com.au> Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Chris Faulhaber wrote: > On Mon, Jan 07, 2002 at 03:50:35PM -0800, Peter Wemm wrote: > > Chris Faulhaber wrote: > > > I finally got around to narrowing down the commit (see > > > below) that slowed by dual P5 box. From my original > > > message to -smp: > >=20 > > !!!!. > >=20 > > I just reread the diff and I dont see anything obviously wrong. Do you j= > ust > > see this in P5 machines? (ie: do you have a P6 smp box as well?) > >=20 > > I have been in contact with a few other people that are also > having problems with their P5's. Gunnar Pruessner reported > a similiar problem at: > http://www.freebsd.org/cgi/getmsg.cgi?fetch=3D5782+15738+/usr/local/www/db/= > text/2001/freebsd-smp/20011007.freebsd-smp > > We have not had any problems on the dual and quad PIII's at > work and I have not seen anyone using P6's report anything > similiar. After some extended trauma (blew up a hard drive), I got my box working. Wow! the slowdown is spectacular. It is running 4.4-RELEASE right now and it is immediately obvious just while booting that it is broken. After it's up, running top takes between 4 and 8 seconds to start up. It's nearly instant in UP mode. If I ktrace it, top takes 26 seconds to start up. Most of the time seems to be spent doing lseek/read of either /dev/mem or /dev/kmem. I'm going to go through this in detail tomorrow after some sleep. At 4:30am I can't think straight. :-] Cheers, -Peter -- Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; peter@netplex.com.au "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message