On Fri, Nov 18, 2016 at 03:36:47PM +0200, David Weinehall wrote:
> Benchmarking shows that on resume we spend quite a bit of time
> just taking and dropping these references, leaving us two options;
> either rewriting the code not to take these references more than
> once, which would be a rather invasive change since the involved
> functions are used from other places, or to optimise
> intel_runtime_pm_{get,put}(). This patch does the latter.
> Initial benchmarking indicate improvements of a couple
> of milliseconds on resume.
>
> Original patch by Chris, with slight fixes by me.
>
> v2: Fix missing return value (Patchwork)
> Remove extra atomic_dec() (Chris)
>
> Signed-off-by: David Weinehall <[email protected]>
> CC: Chris Wilson <[email protected]>
Cc: Imre Deak <[email protected]>
I'm happy with this. Not amused that it apparently saves quite a bit of
overhead with frequent pm_runtime calls.
Imre?
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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