Date: Tue, 16 Jul 2002 23:48:30 -0700 From: Peter Wemm <peter@wemm.org> To: Matt Dillon <dillon@FreeBSD.org> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/i386 machdep.c Message-ID: <20020717064830.E40613910@overcee.wemm.org> In-Reply-To: <200207170541.g6H5fiiv080287@freefall.freebsd.org>
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Matt Dillon wrote:
> dillon 2002/07/16 22:41:44 PDT
>
> Modified files:
> sys/i386/i386 machdep.c
> Log:
> Qualify comment on machdep.cpu_idle_hlt. Turning this on on a SMP
> machine will result in approximately a 4.2% loss of performance (buildworld
)
> and approximately a 5% reduction in power consumption (when idle). Add XXX
> note on how to really make hlt work (send an IPI to wakeup HLTed cpus on
> a thread-schedule event? Generate an interrupt somehow?).
I believe Seigo Tanimura is tinkering with this (send IPI), but I do not
know how far along he is.
Cheers,
-Peter
--
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5
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