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Date:      Mon, 20 Sep 1999 11:16:05 +0200
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        "David Schwartz" <davids@webmaster.com>
Cc:        "Mike Smith" <mike@smith.net.au>, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/i386/conf files.i386 src/sys/i386/i386 mp_clock.c 
Message-ID:  <21851.937818965@critter.freebsd.dk>
In-Reply-To: Your message of "Mon, 20 Sep 1999 02:08:44 PDT." <000001bf0347$bd39b3e0$021d85d1@youwant.to> 

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In message <000001bf0347$bd39b3e0$021d85d1@youwant.to>, "David Schwartz" writes

>	If it's not too difficult, can you do both? Use the most reliable source
>(PIIX) as your base time reference, and then use the TSC to 'add on a bit'
>to make it a bit more precise. This way, even if the TSC is somehow
>corrupted, your worst-case accuracy will be what your best case with just
>the PIIX.

The problem is that the needed code complexity soaks up any advantage
from doing so...

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!


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