powerd / cpufreq question
Ian Smith
smithi at nimnet.asn.au
Tue Apr 12 16:52:28 UTC 2011
On Tue, 12 Apr 2011, Daniel Gerzo wrote:
> On 11.4.2011 6:08, Ian Smith wrote:
> >
> > As you see, total of differences for each cpu is here 89 ticks, but I've
> > no idea of the interval between your two readings, or your value of HZ?
>
> the interval may have been around 1-2 seconds.
> My value of HZ is default, 1000.
Ok, seems it depends on stathz, not HZ, so 89'd be less than 1 second if
your stathz is 128 .. I gather that may be changed with the 9.x timers?
> > Are those kern.cp_times values as they came, or did you remove trailing
> > zeroes? Reason I ask is that on my Thinkpad T23, single-core 1133/733
> > MHz, sysctl kern.cp_time shows the usual 5 values, but kern.cp_times has
> > the same 5 values for cpu0, but then 5 zeroes for each of cpu1 through
> > cpu31, on 8.2-PRE about early January. I need to update the script to
> > remove surplus data for non-existing cpus, but wonder if the extra data
> > also appeared on your 12 core box?
>
> I haven't removed anything, it's a pure copy&paste.
Thanks. I'll check the single-cpu case again after updating to 8.2-R
cheers, Ian
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