Date: Sun, 16 Nov 1997 22:31:17 -0800 (PST) From: Ian Struble <ian@majesticnet.com> To: Amancio Hasty <hasty@rah.star-gate.com> Cc: current@FreeBSD.ORG, "Jordan K. Hubbard" <jkh@time.cdrom.com> Subject: Re: make world time???/ Message-ID: <XFMail.971116223117.ian@majesticnet.com> In-Reply-To: <199711170540.VAA00863@rah.star-gate.com>
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I just built a dual PP200 that I was going to burnin by doing a few dozen make worlds on before sending it out, but alas I only had a buslogic PCI SCSI for the system drives ;( The I/O would have been sweet too because it has a DAC960 raid controller with 32megs of cache and 5 x 4.5gigs worth of raid 0,1 or 5. I was really bummed when I saw the buslogic and couldn't get my hands on a 2940. Actually is there even support for the Mylex RAID controllers? Ian On 17-Nov-97 Amancio Hasty wrote: > 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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