[Bug 86656] New: glMark2 performance regression on mesa 10.3 or master branch

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Nov 24 00:45:10 PST 2014


            Bug ID: 86656
           Summary: glMark2  performance regression on mesa 10.3 or master
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: xiong.y.zhang at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org


the score of running "glmark2 --off-screen":
mesa 10.2: 1412
mesa 10.3 or master: 979

Through bisect, I found the bad commit is:
commit 2f28a0dc23165123cf1e8b5942acad37878edd8a
Author: Kristian Høgsberg <krh at bitplanet.net>
Date:   Mon Jul 7 16:44:58 2014 -0700

    i965: Implement fast color clears using meta operations

I did the following test to confirm this regression is introduced by commit
1) git checkout 2f28a0d
   git revert 2f28a0d
   the score is 1412

2) git checkout 2f28a0d
   git am 14c1a2a9
   the score is 1052

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