[Bug 75140] [BYT-M] WebGL (Auqarium/ Dynamic Cubemap /Toon-Shading) performance on firefox hugely slower than chrome

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75140

--- Comment #5 from Eero Tamminen <eero.t.tamminen at intel.com> ---
(In reply to comment #4)
> (In reply to comment #3)
> 
> By check "about:config",
> 1."Use hardware acceleration where available" is enable.
> 2.layers HW:layers.acceleration.disabled (defult).

You could try:
  webgl.force-enabled=true
 layers.acceleration.force-enabled=true


> "intel_gpu_top" show render busy:9%-15% when run the case.

Pressing "1" in "top" lists CPU utilization for each core separately.  If FF
limited by CPU utilization?

If that happens also with layers HW acceleration, I think this is FF issue, not
Mesa one.  Firefox just isn't using GPU.  To verify that it's not a Mesa issue,
you could do (as root):
  perf record -a
  ^C  (after half a minute)
  report report -n -s dso

To see what is using most CPU in the benchmark.

(Note: perf results are valid only if process is using all CPU as perf record
is counting only active cycles, not idling (e.g. waiting for GPU), i.e. check
first from "top" that use-case is really CPU bound.)

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