Skip site navigation (1)Skip section navigation (2)
Date:      Thu, 20 Mar 1997 05:08:39 +1100
From:      Bruce Evans <bde@zeta.org.au>
To:        cvs-all@freefall.freebsd.org, CVS-committers@freefall.freebsd.org, cvs-share@freefall.freebsd.org, obrien@freefall.freebsd.org
Subject:   Re: cvs commit:  src/share/doc/FAQ FAQ.sgml
Message-ID:  <199703191808.FAA00271@godzilla.zeta.org.au>

next in thread | raw e-mail | index | archive | help
>  Modified:    share/doc/FAQ  FAQ.sgml
>  Log:
>  FreeBSD uses the HALT instruction in its idle loop to save power.

Actually, FreeBSD uses the HLT instruction.  There is no HALT instruction
on i386's.

Currently actually, FreeBSD usually does about 1800 instructions of vm book
keeping at the beginning of the idle loop.  This is too many, and the cpu
doesn't stay halted for as long as it should.

Bruce



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199703191808.FAA00271>