Messages in this thread | | | From | "Doug Smythies" <> | Subject | RE: [RFT][PATCH v5 0/7] sched/cpuidle: Idle loop rework | Date | Sat, 17 Mar 2018 09:11:53 -0700 |
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On 2018.03.17 Thomas Ilsche wrote:
> Over the last week I tested v4+pollv2 and now v5+pollv3. With v5, I > observe a particular idle behavior, that I have not seen before with > v4. On a dual-socket Skylake system the idle power increases from > 74.1 W (system total) to 85.5 W with a 300 HZ build and even to > 138.3 W with a 1000 HZ build. A similar Haswell-EP system is also > affected.
I confirm your idle findings. There is a regression between V4 and V5. The differences on my test computer are much less than on yours, probably because I have only 8 CPUs.
http://fast.smythies.com/rjw_idle.png
1000 Hz kernel only.
... Doug
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