[Bug 88103] [BSW Bisected] RC6 timeout mode patch causes random GPU freq drops and up to -40% performance regressions

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Jan 16 00:25:33 PST 2015


https://bugs.freedesktop.org/show_bug.cgi?id=88103

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|high                        |highest
            Summary|[BSW Bisected]GLES 3DMMES   |[BSW Bisected] RC6 timeout
                   |2.0 taiji performance       |mode patch causes random
                   |decreased by ~40%           |GPU freq drops and up to
                   |                            |-40% performance
                   |                            |regressions

--- Comment #7 from Eero Tamminen <eero.t.tamminen at intel.com> ---
This seems to cause GPU frequency to fluctuate randomly.   Some test-runs go at
full speed, some fluctuate, for test cases that are fully GPU bound.

I've also seen the effect in several other tests (e.g. Unigine Valley and
SynMark Deferred).

This kind of behavior breaks performance testing so *it needs to be reverted*
until GPU freq issue if fixed.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20150116/338e91cb/attachment-0001.html>


More information about the intel-gfx-bugs mailing list