[Intel-gfx] [PATCH] drm/i915: Stop using RP_DOWN_EI on Baytrail

2017-03-13 Thread Chris Wilson
On Baytrail, we manually calculate busyness over the evaluation interval to avoid issues with miscaluations with RC6 enabled. However, it turns out that the DOWN_EI interrupt generator is completely bust - it operates in two modes, continuous or never. Neither of which are conducive to good behavio

Re: [Intel-gfx] [PATCH] drm/i915: Stop using RP_DOWN_EI on Baytrail

2017-02-22 Thread Chris Wilson
On Tue, Feb 21, 2017 at 06:22:02PM +, Chris Wilson wrote: > On Baytrail, we manually calculate busyness over the evaluation interval > to avoid issues with miscaluations with RC6 enabled. However, it turns > out that the DOWN_EI interrupt generator is completely bust - it > operates in two mode

[Intel-gfx] [PATCH] drm/i915: Stop using RP_DOWN_EI on Baytrail

2017-02-21 Thread Chris Wilson
On Baytrail, we manually calculate busyness over the evaluation interval to avoid issues with miscaluations with RC6 enabled. However, it turns out that the DOWN_EI interrupt generator is completely bust - it operates in two modes, continuous or never. Neither of which are conducive to good behavio