Messages in this thread | | | Date | Sat, 27 Apr 2013 04:58:53 +0000 (UTC) | From | "Artem S. Tashkinov" <> | Subject | CONFIG_X86_INTEL_PSTATE disables CPU frequency transition stats, many governors and other standard features |
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Hello,
Just wanted to let everyone know that CONFIG_X86_INTEL_PSTATE wreaks havoc with the CPU frequency subsystem in the Linux kernel.
With this option enabled:
1) All governors except performance and powersave are gone, ondemand userspace, conservative
2) scaling_cur_freq is gone, thus user space utilities monitoring the CPU frequency have stopped working
3) CPU frequency transition stats are gone, there's no "stats" directory anywhere
4) scaling_available_frequencies is gone, so I cannot set the desired constant CPU frequency (the userspace governor is not available anyway)
Is this an intended behavior? I shrivel to think that's the case.
The bug report is filed here: https://bugzilla.kernel.org/show_bug.cgi?id=57141
Best regards,
Artem
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