From owner-freebsd-current Sun Nov 16 21:40:57 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id VAA13101 for current-outgoing; Sun, 16 Nov 1997 21:40:57 -0800 (PST) (envelope-from owner-freebsd-current) Received: from rah.star-gate.com (rah.star-gate.com [204.188.121.18]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id VAA13096 for ; Sun, 16 Nov 1997 21:40:55 -0800 (PST) (envelope-from hasty@rah.star-gate.com) Received: from rah.star-gate.com (localhost.v-site.net [127.0.0.1]) by rah.star-gate.com (8.8.8/8.8.5) with ESMTP id VAA00863; Sun, 16 Nov 1997 21:40:49 -0800 (PST) Message-Id: <199711170540.VAA00863@rah.star-gate.com> X-Mailer: exmh version 2.0gamma 1/27/96 To: "Jordan K. Hubbard" cc: current@FreeBSD.ORG Subject: Re: make world time???/ In-reply-to: Your message of "Sun, 16 Nov 1997 21:27:13 PST." <28686.879744433@jkh.cdrom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sun, 16 Nov 1997 21:40:49 -0800 From: Amancio Hasty Sender: owner-freebsd-current@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Well, your worlstone time : " I shaved off 40 minutes off " is admirable Still looking for the SMP configuration on fast disks "world stone figure" Tnks, Amancio > > I do a make world in about 75 minutes -- I just didn't do profiled libraries. > > Argh. If we're going to compare worldstone numbers, we've really > got to converge on some standard for what consititutes a proper > one. ;-) In my own benchmarks, I always do a completely "standard" > build with only one exception, which is to add CFLAGS=-O -pipe > to /etc/make.conf (oh yeah, /usr also mounted async). Other > folks stripe /usr/obj or mount it noatime or do any number > of other things (like NOPROFILE) which can only skew the numbers > when comparing them. Maybe the first step would be to agree > upon a script for launching the world build which sets various > environment variables consistently? Then we'd at least be > down to just the I/O trickieries as variants. > > I've definitely noticed, with my dual P6/233 (and yes Virginia, > it is possible to overclock a P6/180 to a P6/233 if you have > good fans and some luck :), that things are primarily *I/O* > bound, not CPU bound, with my single IBM DCAS 4.3 GB drive > (these are 5400 RPM and not quite speed demons). On a > machine with /usr/src and /usr/obj mounted on a 5 drive > (Quantum 2GB) CCD array, I can shave as much as 40 minutes > off the world build just on a uniprocessor P6/200, which > is definitely food for thought. > > Jordan