From owner-freebsd-stable  Fri Jun 28 15: 0:29 2002
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Date: Fri, 28 Jun 2002 18:00:02 -0400 (EDT)
From: John Baldwin <jhb@FreeBSD.org>
To: John David Duncan <jdd@greatschools.net>
Subject: RE: 2 xeons = 4 CPUs?
Cc: freebsd-stable@freebsd.org, freebsd-smp@freebsd.org
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On 28-Jun-2002 John David Duncan wrote:
> Hey,
> 
> I just installed 4.6-RELEASE on a dual 1.8Mhz Xeon + Tyan S2720
> motherboard (a Relion 140 server from Penguin Computing, actually).
> When I reboot with an SMP kernel, I see:
> 
> CPU: Pentium 4 (2199.76-Mhz 686-class CPU)
> CPU: Pentium 4 (2199.76-Mhz 686-class CPU)
> CPU: Pentium 4 (2199.76-Mhz 686-class CPU)
> CPU: Pentium 4 (2199.76-Mhz 686-class CPU)
> SMP: AP CPU #1 Launched!
> SMP: AP CPU #2 Launched!
> SMP: AP CPU #3 Launched!
> 
> That's twice as many CPUs as I think I have, each going 400Mhz faster.  Is
> this safe?  Correct?  Is it that hyperthreading stuff?  Should I disable
> it?

Yes, it is HT and it should work fine.  Let us know if there are any
problems.

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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