Date: Sun, 6 Apr 2003 13:39:27 -0700 (PDT) From: Nate Lawson <nate@root.org> To: Tor.Egge@cvsup.no.freebsd.org Cc: des@ofug.org Subject: Re: cvs commit: src/sys/conf options.i386 src/sys/i386/i386 tsc.c src/sys/i386/conf NOTES Message-ID: <Pine.BSF.4.21.0304061338460.23366-100000@root.org> In-Reply-To: <20030406152554B.tegge@cvsup.no.freebsd.org>
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On Sun, 6 Apr 2003 Tor.Egge@cvsup.no.freebsd.org wrote: > > Is there a simple procedure to determine whether the TSCs on any given > > multi-CPU machine are synchronized? > > Ensure that the TSCs are used, then run a program which calls > gettimeofday() in a loop and prints an error message each time the > clock steps backwards. Repeat procedure after 1 day of uptime. Perhaps you could enable this option by default if it had a corresponding check for drift that would disable it if things got out of hand. -Nate
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