Date: Fri, 28 Apr 2000 23:01:52 -0400 From: James Housley <jim@thehousleys.net> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Terry Lambert <tlambert@primenet.com>, Jeremiah Gowdy <jgowdy@home.com>, Steve Passe <smp@csn.net>, freebsd-smp@FreeBSD.ORG Subject: Re: hlt instructions and temperature issues Message-ID: <390A50A0.554B1D1A@thehousleys.net> References: <200004282108.OAA01313@usr08.primenet.com> <200004282240.PAA14200@apollo.backplane.com>
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Matthew Dillon wrote:
>
>
> For example, if we can remove *ALL* memory writes from the best-case
> idle loop it should make a huge difference in heat dissipation without
> having to resort to HLT! Right now we make a number of subroutine
> calls (such as to procrunnable()) which will result in external
> bus cycles. If those can be inlined it should have a noticeable effect.
>
I haven't looked the the Pentuim instruction set in a long while, but is
there low-power mode that could be used instead of hlt? Slow down, but
not sleep the CPU until it is needed?
Jim
--
"Eagles may soar, but weasels don't get sucked into jet engines"
-- Anon
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