[Intel-gfx] [PATCH] RFC drm/i915: Slaughter the thundering i915_wait_request herd

[Chris Wilson]

On Mon, Nov 02, 2015 at 02:00:47PM +0000, Gong, Zhipeng wrote:
> Attach the perf data for BDW async1 and async5 with or without patch. 

Hmm, I can see it is the i915_spin_request() consuming the time, but I
was hoping to get the callgraph so I could see where the call to
i915_wait_request was originating from. Could you regenerate the perf
report with -g (or maybe you need a slightly newer perf)?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre