Pending issues

John Baldwin jhb at FreeBSD.org
Fri Aug 5 19:26:06 GMT 2005


On Friday 05 August 2005 10:01 am, Eric Anderson wrote:
> John Baldwin wrote:
> > On Tuesday 02 August 2005 04:57 pm, Eric Anderson wrote:
> >>John Baldwin wrote:
> >>>On Tuesday 02 August 2005 04:28 pm, Eric Anderson wrote:
> >>>>Ok, here's a small list of issues pending that I can see on -current
> >>>>(and I saw these on 6- branch too before 7.0).
> >>>>
> >>>>- Time ticks along correctly, but anything using an interval will be 2x
> >>>>off.  For instance - ping will only send a ping every 2 seconds instead
> >>>>of every second.  systat -vmstat 1 refreshes every 2 seconds, etc.
> >>>>Disabling APIC 'fixes' it.
> >>>
> >>>Are you using the i8254 timecounter or some other timecounter?
> >>
> >>kern.timecounter.choice: TSC(800) ACPI-fast(1000) i8254(0)
> >> dummy(-1000000) kern.timecounter.hardware: ACPI-fast
> >>
> >>Which is the default (I'm not forcing anything anywhere).  I believe at
> >>one time I tried i8254, but it made no difference.  I can try it again
> >>if you think it's a worthy experiment.
> >
> > I would try both i8254 and TSC and see if it makes a difference.
>
> Can I do this via sysctl, or do I need to rebuild my kernel?

sysctl.  Just write the name of the new one to kern.timecounter.hardware

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org


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