[Bug 78248] New: [BDW GT3]igt/gem_render_copy costs long time to execute

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78248

          Priority: medium
            Bug ID: 78248
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW GT3]igt/gem_render_copy costs long time to
                    execute
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 98410
  --> https://bugs.freedesktop.org/attachment.cgi?id=98410&action=edit
dmesg

*System Environment:
--------------------------
Platform: BDW GT3
kernel: 
-nightly: 08ce6614d07dd1e426109672a5e323317c8d6ec7(fails)
-queued: e5c03ca362819ba8ffbe5674340b61b9cd75de8f (fails)
-fixes: 9bbfd20abe5025adbb0ac75160bd2e41158a9e83 (works)


 *Bug detailed description:
-----------------------------
igt/gem_render_copy costs long time to execute, the test unable to finish in 15
minutes.


It's first time to run this case on GT3

Output:
./gem_render_copy
IGT-Version: 1.6-gc1404e0 (x86_64) (Linux:
3.14.0_drm-intel-next-queued_e5c03c_20140504+ x86_64)


 *Reproduce steps:
---------------------------- 
1. ./gem_render_copy

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