[Bug 83914] [HSW]: power usage rises a lot after resume from suspend to ram

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83914

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #0) 
> It happens with minimal userspace, so I don't blame userspace. powertop
> estimates that 17W is used by "CPU core" (I assume intel gpu hides under
> this, too). "perf top" doesn't show any obvious suspects.

The GPU itself is measured separately, but that only really measures the EU
power, not the display or the influence of the GPU on the L3 cache ring. (I
would expect the ring power to be tallied under the CPU, so it is entirely
possible the GPU is causing it to run at maximum frequency and we end up
blaming the CPU.)

Best hope is that this is an easily identifiable kernel regression. *fingers
crossed*

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