Re: [PATCH v2] drm/i915/bdw: BDW Software Turbo

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This Software turbo will mainly take place of the hardware driven interrupt part without touching the boost/idle strategy.
So gen6_rps_boost and gen6_rps_idle will still function for BDW.

I can revise the commit message to clarify.

On 7/10/2014 12:07 PM, Chris Wilson wrote:
On Thu, Jul 10, 2014 at 11:42:59AM -0700, Sun, Daisy wrote:
GT is not going to run at a single frequency all the time actually.
It starts from a single frequency, and then will dynamically adjust
according to the GT utilization, either go up or down.
 From this perspective, SW turbo function the same as the HW turbo.
Urm, read your code again.

For the algorithm, we did go over the design forum before implementation.
What kind of improvement is expected? Please let me know if any
important case is not taken into account. Thanks.
You have no faststart or boost strategy, so typical desktop usage will
feel very laggy. For a large number of use cases you never change
freequency.
-Chris


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