Date: Sat, 22 Jun 2002 09:48:02 -0700 From: Luigi Rizzo <rizzo@icir.org> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: Mark Peek <mp@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/isa clock.c Message-ID: <20020622094802.D92778@iguana.icir.org> In-Reply-To: <648.1024764024@critter.freebsd.dk>; from phk@critter.freebsd.dk on Sat, Jun 22, 2002 at 06:40:24PM %2B0200 References: <20020622093250.C92778@iguana.icir.org> <648.1024764024@critter.freebsd.dk>
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On Sat, Jun 22, 2002 at 06:40:24PM +0200, Poul-Henning Kamp wrote: ... > It's mostly harmless to make it a 64bit quantity, but there is a nasty > division in the timecounter-windup function which would get nastier. speaking of clocks: I have had recurrent problems in the past with boxes using the 8254 as timecounter, saying "microtime went backwards" and showing negative tv_usec values in struct timeval fields returned by gettimeofday. The workaround is to use TSC, but there appears to be a problem in the timekeeping code with the 8254 -- any idea on where this could come from ? cheers luigi ----------------------------------+----------------------------------------- Luigi RIZZO, luigi@iet.unipi.it . ICSI (on leave from Univ. di Pisa) http://www.iet.unipi.it/~luigi/ . 1947 Center St, Berkeley CA 94704 Phone: (510) 666 2927 ----------------------------------+----------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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