[Bug 78244] New: [IVB/HSW ULT]igt/gem_render_tiled_blits costs long time to execute

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78244

          Priority: medium
            Bug ID: 78244
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB/HSW ULT]igt/gem_render_tiled_blits 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 98402
  --> https://bugs.freedesktop.org/attachment.cgi?id=98402&action=edit
dmesg

*System Environment:
--------------------------
Platform: IVB HSW ULT
kernel: 
-nightly: 08ce6614d07dd1e426109672a5e323317c8d6ec7(fails)
-queued: e5c03ca362819ba8ffbe5674340b61b9cd75de8f (fails)
-fixes: 9bbfd20abe5025adbb0ac75160bd2e41158a9e83 (fails)


 *Bug detailed description:
-----------------------------
igt/gem_render_tiled_blits costs long time to execute, it costs about 12
minutes to finish.


This case always timeout.

Output:
date;./gem_render_tiled_blits;date
Sun May  4 13:07:16 CST 2014
IGT-Version: 1.6-gc864279 (x86_64) (Linux:
3.15.0-rc2_drm-intel-nightly_08ce66_20140504+ x86_64)
Using 3072 1MiB buffers
Verifying initialisation...
Cyclic blits, forward...
Cyclic blits, backward...
Random blits...
Sun May  4 13:18:33 CST 2014

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

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