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SubjectRe: [RFT][PATCH v7 5/8] cpuidle: Return nohz hint from cpuidle_select()
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.

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