Date: Wed, 14 Nov 2001 09:20:01 -0800 (PST) From: Ming Zhang <ming@unixbox.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/31971: microuptime() went backwards when apm is already disabled in the kernel on intel CPU Message-ID: <200111141720.fAEHK1T22834@freefall.freebsd.org>
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The following reply was made to PR kern/31971; it has been noted by GNATS. From: Ming Zhang <ming@unixbox.com> To: David Malone <dwmalone@maths.tcd.ie> Cc: <freebsd-gnats-submit@FreeBSD.org> Subject: Re: kern/31971: microuptime() went backwards when apm is already disabled in the kernel on intel CPU Date: Wed, 14 Nov 2001 09:26:23 -0800 (PST) Hi, here it's the output: # sysctl kern.timecounter kern.timecounter.method: 0 kern.timecounter.hardware: TSC I've set kern.timecounter to 1 and will see if that stops the prob. thanks Ming On Wed, 14 Nov 2001, David Malone wrote: > On Tue, Nov 13, 2001 at 11:02:45PM -0800, Ming Zhang wrote: > > >Description: > > microuptime() went backwards (1569221.6122007 -> 1569220.755141) > > > > it happens every other 3-4 days. > > > > Machine is a PIII-650Mhz on ASUS CUV 4X > > APM is already disabled from kernel (never was configured) > > > > Never seen this before upgrading to 4.4 > > Can you try running "sysctl kern.timecounter" and see what it > outputs. You could try setting kern.timecounter.method to 1 or > experimenting with kern.timecounter.hardware (which can probably > be set to i8254 or TSC on your hardware). > > David. > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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