Date: Tue, 23 May 2000 11:09:09 -0700 (PDT) From: Allan Saddi <asaddi@philosophysw.com> To: Andre Albsmeier <andre@akademie3000.de> Cc: Philipp Huber <uebs@gmx.at>, freebsd-questions@FreeBSD.ORG, johan.dahlberg@home.se Subject: Re: Temperatures Message-ID: <Pine.BSF.4.21.0005231103350.72381-100000@web2.sea.nwserv.com> In-Reply-To: <20000522175007.A2288@schlappy.mobile.tld>
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On Mon, 22 May 2000, Andre Albsmeier wrote:
> I think, what Johan wanted to know is: Does FreeBSD use the HLT
> instruction when idle'ing around? If yes, the CPU should be cooler
> than it is now...
I found this in sys/i386/i386/swtch.s:
ENTRY(default_halt)
sti
#ifndef SMP
hlt /* XXX: until a wakeup IPI */
#endif
ret
So it appears Ben Smithurst was correct. Under FreeBSD SMP, both CPUs are
always running at full speed.
--
Allan Saddi "The Earth is the cradle of mankind,
asaddi@philosophysw.com but we cannot live in the cradle
http://www.philosophysw.com/asaddi/ forever." - K.E. Tsiolkovsky
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