Date: Mon, 1 May 2000 16:16:26 +0200 From: Dave Boers <djb@ifa.au.dk> To: Steve Passe <smp@csn.net> Cc: Karl Pielorz <kpielorz@tdx.co.uk>, smp@FreeBSD.ORG Subject: Re: hlt instructions and temperature issues Message-ID: <20000501161626.A4317@relativity.student.utwente.nl> In-Reply-To: <200004301511.JAA16392@Ilsa.StevesCafe.com>; from smp@csn.net on Sun, Apr 30, 2000 at 09:11:12AM -0600 References: <20000430163824.A1093@relativity.student.utwente.nl> <200004301511.JAA16392@Ilsa.StevesCafe.com>
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On Sun, Apr 30, 2000 at 09:11:12AM -0600, Steve Passe wrote:
> Some with experience in this area should make a sysctl that changes the value
> of _hlt_vector, one that has the hlt, another that doesn't:
>
> .globl _hlt_vector
> #ifdef SMP
> _hlt_vector: .long _no_halt /* pointer to halt routine */
> #else
> _hlt_vector: .long _real_halt /* pointer to halt routine */
> #endif
>
> ENTRY(no_halt)
> sti
> ret
>
> ENTRY(real_halt)
> sti
> hlt
> ret
>
> ...
> call *_hlt_vector /* wait for interrupt */
This looks like an excellent proposal. Does anyone have comments, or could
someone with experience" in this area provide a patch?
> As I said before, its "weird". I'm not ready to believe there is any speed
> increase yet... I expected a decrease, I was just trying to determine how
> much...
Just came to my mind. There's another difference between your tests and
mine: you're running 5.0-CURRENT while I have 4.0-STABLE.
Regards,
Dave.
--
djb@ifa.au.dk d.j.boers@tn.utwente.nl
PGP key: ftp://relativity.student.utwente.nl:/pub/pgpkeys/djb.asc
In the land of the blind, the one-eyed man is murdered for heresy
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