Date: Sun, 04 Oct 1998 00:06:15 -0700 From: Mike Smith <mike@smith.net.au> To: Bruce Evans <bde@zeta.org.au> 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 Message-ID: <199810040706.AAA02436@dingo.cdrom.com> In-Reply-To: Your message of "Sun, 04 Oct 1998 16:16:24 %2B1000." <199810040616.QAA26536@godzilla.zeta.org.au>
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> >> 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
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