Skip site navigation (1)Skip section navigation (2)
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>

next in thread | raw e-mail | index | archive | help
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




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200111141720.fAEHK1T22834>