[Bug 86969] _drm_intel_gem_bo_references() function takes half the CPU with Witcher2 game

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86969

Eero Tamminen <eero.t.tamminen at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |VERIFIED

--- Comment #6 from Eero Tamminen <eero.t.tamminen at intel.com> ---
Verified.  CPU utilization is lower, now CPU freq can also sometimes dip lower
(on the core on which witcher is running).  FPS is same, it just fluctuates a
bit more due to CPU freq changes.

CPU utilization is now mostly due to there just being a lot of system calls
(vdso usage below is just for clock_gettime()), not because of libdrm
relocations:
  36,70%         76240  [kernel.kallsyms]
  15,13%         25936  [vdso]
  13,69%         32532  perf-20837.map
  11,94%         20298  i965_dri.so
   8,54%         15647  the
   4,71%          8515  libpthread-2.19.so
   4,30%          7280  libdrm_intel.so.1.0.0
   1,82%          3456  libc-2.19.so
   1,10%          1857  libglapi.so.0.0.0
   0,77%          1304  libdrm.so.2.4.0

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