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FreeBSD uses the HALT instruction in its idle loop to save power.

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Noticed by:	Stephen Roome <steve@visint.co.uk>
This commit is contained in:
David E. O'Brien 1997-03-19 17:17:59 +00:00
parent b90e65a439
commit 282c34bc1a
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=1328
1 changed files with 7 additions and 5 deletions
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12
FAQ/FAQ.sgml
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@ -1,5 +1,5 @@
<!DOCTYPE linuxdoc PUBLIC "-//FreeBSD//DTD linuxdoc//EN"> <!DOCTYPE linuxdoc PUBLIC "-//FreeBSD//DTD linuxdoc//EN">
<!-- $Id: FAQ.sgml,v 1.37 1997-03-13 01:00:32 joerg Exp $ --> <!-- $Id: FAQ.sgml,v 1.38 1997-03-19 17:17:59 obrien Exp $ -->
<article> <article>
@ -7,7 +7,7 @@
<author>Maintainer: Peter da Silva <tt><htmlurl url='mailto:pds@FreeBSD.ORG' <author>Maintainer: Peter da Silva <tt><htmlurl url='mailto:pds@FreeBSD.ORG'
name='&lt;pds@FreeBSD.ORG&gt;'></tt> name='&lt;pds@FreeBSD.ORG&gt;'></tt>
<date>$Date: 1997-03-13 01:00:32 $ <date>$Date: 1997-03-19 17:17:59 $
<abstract> <abstract>
This is the FAQ for FreeBSD systems version 2.X All entries are This is the FAQ for FreeBSD systems version 2.X All entries are
assumed to be relevant to FreeBSD 2.0.5+, unless otherwise noted. assumed to be relevant to FreeBSD 2.0.5+, unless otherwise noted.
@ -2153,9 +2153,11 @@ pseudo-device vn #Vnode driver (turns a file into a device)
now, working on their new ``scratch and sniff'' GUI. It's a now, working on their new ``scratch and sniff'' GUI. It's a
funny old business we're in! funny old business we're in!
Seriously, Linux uses the ``<tt/HALT/'' instruction when the Seriously, both FreeBSD and Linux uses the ``<tt/HALT/''
system is idle thus lowering its energy consumption and therefore instruction when the system is idle thus lowering its energy
the heat it generates. consumption and therefore the heat it generates. Also if you
have APM (automatic power management) configured, then FreeBSD
can also put the CPU into a low power mode.
<sect1> <sect1>
<heading>Who's scratching in my memory banks??</heading> <heading>Who's scratching in my memory banks??</heading>