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SubjectRE: [RFT][PATCH v7 5/8] cpuidle: Return nohz hint from cpuidle_select()
On 2018.03.21 11:00 Thomas Ilsche wrote:
> On 2018-03-21 15:36, Rafael J. Wysocki wrote:
>> So please disregard this one entirely and take the v7.2 replacement
>> instead of it:
>> The current versions (including the above) is in the git branch at
>> git:// \
>> idle-loop-v7.2
> With v7.2 (tested on SKL-SP from git) I see similar behavior in idle
> as with v5: several cores which just keep the sched tick enabled.
> Worse yet, some go only in C1 (not even C1E!?) despite sleeping the
> full sched tick.
> The resulting power consumption is ~105 W instead of ~ 70 W.
> I have briefly ran v7 and I believe it was also affected.

I am not able to repeat your issues anymore.
Idle powers were fine with V7, on my test computer.
I have not done thorough idle tests with V7.2, but they looked O.K.

As for the high frequency loop stuff, I no longer see any issues there
either. I tried several loops frequencies, and did one for a couple of hours.

I'll try again later today, as there is a test running now (frequency sweep)
that takes about 4 hours.

... Doug

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