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Date:      Fri, 05 Nov 1999 14:56:15 -0800
From:      Mike Smith <mike@smith.net.au>
To:        freebsd-smp@FreeBSD.ORG
Subject:   Re: Dual Celeron + FreeBSD? 
Message-ID:  <199911052256.OAA00440@dingo.cdrom.com>
In-Reply-To: Your message of "Fri, 05 Nov 1999 20:26:28 %2B0100." <199911051926.UAA06749@dorifer.heim3.tu-clausthal.de> 

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> Adam Strohl wrote in list.freebsd-smp:
>  > I Agree totaly with this, disk is THE choke point for make world for=
 my
>  > SMP system, must ... resist .. urge ... to ... buy ... SCSI ... hard=
ware.
>  > :)
> =

> No no...  Buy more RAM!  :-)
> =

> Then put /usr/src on an MFS, and enable Soft-updates on
> /usr/obj (it doesn't matter much if that's IDE or SCSI,
> but it should use UDMA if it's IDE).
> =

> Then you can do a make buildworld in less than 40 minutes
> on an SMP machine.  I had the great pleasure to try that
> once.  :)

Under 40 minutes is very hard on a current intel architecture box; the =

4-way Xeon 400/256 that we have here will do about 39 even on -current =

as of a couple of weeks ago, with everything except $DESTDIR on an MFS.

To go much faster will require more memory bandwidth, or possibly =

faster CPUs with more cache (not so sure about that part).

-- =

\\ Give a man a fish, and you feed him for a day. \\  Mike Smith
\\ Tell him he should learn how to fish himself,  \\  msmith@freebsd.org
\\ and he'll hate you for a lifetime.             \\  msmith@cdrom.com




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