On 6/28/2013 11:37 AM, Chris Wilson wrote:
On Fri, Jun 28, 2013 at 09:54:32AM -0700, Jesse Barnes wrote:
Coming out of idle is usually due to some sort of user input (swiping a
screen, clicking a button) and often results in some sort of graphical
animation. To prevent stutter for a CPU or GPU intensive animation,
boost the GPU and CPU freq to the maximum to get the first frame out as
quickly as possible. The normal CPU and GPU frequency management code
will take over from there and (hopefully) clock down to save power as
needed if the max frequencies aren't required.
This could probably be done more cleanly, and possibly without another
uncached read in the execbuf path if we tracked idleness elsewhere. I'm
also unsure about the cpufreq calls; I don't really know if this will do
what I want...
Would seem like a good idea to make intel_mark_busy() dtrt and use them.
-Chris
Is there a way to force the GPU always to run at the top speed?
(since it might well be the most efficient way to run things due to
race-to-halt)
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