From owner-freebsd-fs Sun Oct 4 00:02:06 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id AAA24752 for freebsd-fs-outgoing; Sun, 4 Oct 1998 00:02:06 -0700 (PDT) (envelope-from owner-freebsd-fs@FreeBSD.ORG) Received: from dingo.cdrom.com (castles144.castles.com [208.214.165.144]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA24668; Sun, 4 Oct 1998 00:01:39 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.9.1/8.8.8) with ESMTP id AAA02436; Sun, 4 Oct 1998 00:06:16 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Message-Id: <199810040706.AAA02436@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: Bruce Evans cc: mike@smith.net.au, Don.Lewis@tsc.tdk.com, freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG, gibbs@plutotech.com, tlambert@primenet.com Subject: Re: filesystem safety and SCSI disk write caching In-reply-to: Your message of "Sun, 04 Oct 1998 16:16:24 +1000." <199810040616.QAA26536@godzilla.zeta.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sun, 04 Oct 1998 00:06:15 -0700 From: Mike Smith Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > >> Yes, the default configuration may be much slower than mine. > > > >I can definitely back your basic point ('make world' is CPU bound) up. > >On a 4-way Xeon system with slow disks we were still able to get down > >around 40 minutes. > > Er, that shows that it is i/o bound on systems with so much CPU. I > got it down to 75 minutes on 1-way K6-233 with 1 IDE disk before it > was bloated by perl5 and transition to elf. Moving to an MFS only saved about 15% of the build time. My point was that a faster CPU let you go faster. If the build was I/O bound, it wouldn't. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message