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Date: Sat, 5 Apr 2003 17:25:23 +1000 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: Tor Egge <tegge@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/conf options.i386 src/sys/i386/i386 tsc.c 
 src/sys/i386/conf NOTES
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On Fri, 4 Apr 2003, Tor Egge wrote:

> tegge       2003/04/04 15:54:47 PST
>
>   FreeBSD src repository
>
>   Modified files:
>     sys/conf             options.i386
>     sys/i386/i386        tsc.c
>     sys/i386/conf        NOTES
>   Log:
>   Add SMP_TSC option, which can be used on SMP systems where the TSCs
>   are synchronized to reduce context switch cost.

This should be implemented by making the TSC timecounter available on
all systems that have a TSC, but not actually using it for the SMP case
unless it is enabled using sysctl "machdep.timecounter.hardware=TSC".

Bruce