[Bug 77754] New: [ILK/SNB/HSW]igt/gem_cpu_reloc is slow

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77754

          Priority: medium
            Bug ID: 77754
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK/SNB/HSW]igt/gem_cpu_reloc is slow
        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 97719
  --> https://bugs.freedesktop.org/attachment.cgi?id=97719&action=edit
dmesg

system Environment:
--------------------------
Platform: ILK SNB HSW
Kernel:(drm-intel-nightly)1e771b84e47085ef9b6efea1321e7cb5a8b2c065

Bug detailed description:
-----------------------------
igt/gem_cpu_reloc test spend about 20 minutes, unable to finish within 10
minutes on -nightly kernel.  


output:
[root at x-pk2 tests]# date;./gem_cpu_reloc;date
Tue Apr 22 21:52:42 CST 2014
IGT-Version: 1.6-g78e4c2b (x86_64) (Linux:
3.14.0_drm-intel-nightly_1e771b_20140421+ x86_64)
gem_cpu_reloc: 100%
Test suceeded, cleanup up - this might take a while.
Tue Apr 22 22:12:42 CST 2014


Reproduce steps:
----------------------------
1. ./gem_cpu_reloc

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