Date: Sun, 16 Nov 1997 21:40:49 -0800 From: Amancio Hasty <hasty@rah.star-gate.com> To: "Jordan K. Hubbard" <jkh@time.cdrom.com> Cc: current@FreeBSD.ORG Subject: Re: make world time???/ Message-ID: <199711170540.VAA00863@rah.star-gate.com> In-Reply-To: Your message of "Sun, 16 Nov 1997 21:27:13 PST." <28686.879744433@jkh.cdrom.com>
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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
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