[Intel-gfx] i915_gem_evict_something in sysprof trace using VBOs

[Peter Clifton]

I was playing with my VBO code, and noticed this sysprof trace
(non-interesting stuff pruned):

drm_ioctl                                         0.13%  56.08%
  i915_gem_execbuffer2                            0.00%  32.50%
    i915_gem_do_execbuffer                        0.08%  32.50%
      i915_gem_object_pin                         0.00%  17.47%
        i915_gem_object_bind_to_gtt               0.03%  17.44%
          i915_gem_evict_something                0.00%  15.54%
            i915_gem_object_unbind                0.00%  15.31%
              i915_gem_object_set_to_cpu_domain   0.00%  13.33%
                i915_gem_clflush_object           0.00%  13.33%
      i915_gem_clflush_object                     0.00%  14.29%
  i915_gem_mmap_gtt_ioctl                         0.00%  10.74%
  i915_gem_set_domain_ioctl                       0.00%   4.98%


The i915_gem_evict_something has me curious. Presumably I have too many
pages of data actively being used by the GPU (or mapped).

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)