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Date:      Sat, 3 Mar 2001 00:00:13 -0800 (PST)
From:      patl@Phoenix.Volant.ORG
To:        "Andrew C. Hornback" <hornback@wireco.net>
Cc:        Mathias HARY <mhary@mhary.com>, hardware@freebsd.org
Subject:   Re: Building the Workstation of the Gods...
Message-ID:  <ML-3.4.983606413.3403.patl@asimov.phoenix.volant.org>
In-Reply-To: <006b01c0a352$ee0080b0$0f00000a@eagle>

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On  2-Mar-01 at 12:22, Andrew C. Hornback (hornback@wireco.net) wrote:
>      Actually, I wanna get the machine going with all 6 of the 200s to
> start off with, and work from there if 1200 MHz is too slow for a
> workstation... *grins*

Don't kid yourself - you won't get anywhere near the performance
that you'd get from a single 1.2 GHz CPU.  SMP just doesn't scale
that way in practice.

Unless you keep your load average above 1, you aren't likely to
see performance better than a single 200 MHz CPU.  You'll need a
load average near 6 just to keep them all busy.  (Unless I missed
something and FreeBSD can allocate threads to different CPUs.  But
even then, it only helps for multi-threaded apps.)

Overall, you'd probably be better off with a single CPU 1.2GHz Athlon.



-Pat

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