Date: Thu, 30 Dec 1999 14:15:01 +0100 From: Wilko Bulte <wilko@yedi.iaf.nl> To: Peter Wemm <peter@netplex.com.au> Cc: Rasmus Kaj <kaj@ns.Raditex.se>, tsikora@powerusersbbs.com, "freebsd-stable@FreeBSD.ORG" <freebsd-stable@FreeBSD.ORG> Subject: Re: Temperature Message-ID: <19991230141501.C62691@yedi.iaf.nl> In-Reply-To: <19991230120711.595DD1CA0@overcee.netplex.com.au>; from peter@netplex.com.au on Thu, Dec 30, 1999 at 08:07:11PM %2B0800 References: <kaj@ns.Raditex.se> <19991230120711.595DD1CA0@overcee.netplex.com.au>
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On Thu, Dec 30, 1999 at 08:07:11PM +0800, Peter Wemm wrote:
> Rasmus Kaj wrote:
> > Peter Wemm wrote, about processor temp, etc:
> >
> > > The main difference is that Linux halts the cpu in the idle loop, we don't.
> > > As a result the cpu is in a tight spin waiting for a process to become
> > > scheduleable. I have some patches half-done that I've been working on for
> > > 4.0 that should probably be able to be adapted to the 3.x series.
> >
> > The FAQ says that FreeBSD does use the HLT instruction when idle, is
> > this wrong?
>
> In uniprocessor mode, yes it uses HLT (and always has). Under SMP it does
> not (and never has).
Peter,
please allow me a layman's question: is there an easy explanation for this
difference?
Thanks,
--
Wilko Bulte Arnhem, The Netherlands - The FreeBSD Project
WWW : http://www.tcja.nl http://www.freebsd.org
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