RE: [intel-pstate driver regression] processor frequency very high even if in idle

[Doug Smythies]

On 2016.03.31 07:40 Doug Smythies wrote:
> On 2016.03.31 02:24 JÃrg Otte wrote:

>>
>> jojo@fichte:/sys/devices/system/cpu/cpufreq/policy0$ cat scaling_governor
>> powersave
>> 
>> turbostat -i 1 --msr=0x199
>> CPUID(7): No-SGX

... [cut]...

> Very Interesting.
>
> I would still like to get a trace sample to post process.
> Copied from a previous e-mail:
>
> On an otherwise idle system, do:
>
> # perf record -a --event=power:pstate_sample sleep 300
>
> If pressed for time, your sleep time can be less than 5 minutes,
> but try to get at least 100 seconds.
>
> The resulting perf.data file will be too big to include as an
> on-list attachment, but send it (or them) to me off-list for
> post processing, and I'll report back.

Never mind. I had not seen some of the e-mails, in particular
the one where Rafael had figured out the issue.

... Doug