SuperMicro i7 (UP) - very slow performance

Andriy Gapon avg at
Thu Sep 23 14:35:55 UTC 2010

on 23/09/2010 15:37 Daniel O'Connor said the following:
> On 23/09/2010, at 21:26, Andriy Gapon wrote:
>> on 23/09/2010 11:26 Alexander Motin said the following:
>>> PS: AFAIK dev.cpu.0.freq won't report you if frequency was lowered due
>>> to overheating.
>> I think that you are correct about this.
>> And last I checked we simply ignored thermal throttling interrupt.
> I could not get cpufreq to show a lower frequency when I tried overheating a CPU even though the performance dropped.
> It would be really nice if there was some notification of CPU throttling :)

cpufreq is not designed to monitor what is going on in cpu.
cpufreq knows what cpu supports and knows host to set a certain frequency
(performance level rather).

Andriy Gapon

More information about the freebsd-stable mailing list