https://bugzilla.kernel.org/show_bug.cgi?id=19702





--- Comment #41 from Thomas Renninger <[email protected]>  2010-11-02 08:59:37 ---
> So, do you need anything else from me?
Eh, yes, I found something else:
You have constant_tsc feature, but not non-stop tsc feature.
CPU idle drivers mark tsc unstable if C-states are used. If C-states also
affect aperf/mperf timers, they must not used as well in this case.
Can you try: idle=halt boot param
Argh, intel idle driver does not recognize idle= overrides.
Please try idle=halt with another patch I'll provide.
Or try both params (then the patch should not be needed):
intel_idle.max_cstate=0 idle=halt
Does cpufreq-aperf then give you sane average frequency values in the range of
min/max freq and cpufreq subsystem works as expected?

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