Kern.timecounter.hardware issues
Charles Howse
chowse at charter.net
Wed Sep 24 06:12:25 PDT 2003
> Hi,
> The following appeared in my daily security run output:
>
> curly.howse.no-ip.org kernel log messages:
> > Timecounter "TSC" frequency 300683473 Hz
>
> I have a Celeron 300 CPU, if that matters.
>
> A quick Google for 'Timecounter "TSC" frequency' led me to
> believe that I should change the hardware timecounter to i8254 with:
>
> sysctl -w kern.timecounter.hardware=i8254
>
> I did that, rebooted, and ran sysctl -a again, only to see
> that kern.timecounter.hardware had reverted to TSC.
>
> I have both i8254 and TSC showing in dmesg.
>
> Should I make the change permanent across reboots, and if so, how?
>
> BTW, are any of you getting the same messages from this list
> over and over again?
> I am, I wonder what's going on?
After re-reading man sysctl, I see I should be able to set any values I
need in /etc/sysctl.conf
I added kern.timecounter.hardware=i8254, saved, rebooted, no joy, still
set to TSC.
The handbook doesn't have anything specific.
What's going on?
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