[Bug 85391] New: [SNB/HSW/BYT]igt/pm_rc6_residency/rc6-accuracy fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85391

            Bug ID: 85391
           Summary: [SNB/HSW/BYT]igt/pm_rc6_residency/rc6-accuracy fails
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jinxianx.guo at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 108331
  --> https://bugs.freedesktop.org/attachment.cgi?id=108331&action=edit
dmesg

==System Environment==
--------------------------
Regression: No.
They are new cases

Non-working platforms: SNB HSW BYT

==kernel==
--------------------------
origin/drm-intel-nightly: 6f628cbf2f18ac47e8afad50e3c328bbc33754d2(fails)
    drm-intel-nightly: 2014y-10m-23d-15h-48m-55s UTC integration manifest
origin/drm-intel-next-queued: 598ae05fd9378f2a6ac493b3daeb85caccce9729(fails)
    drm/i915: Emit even number of dwords when emitting LRIs
origin/drm-intel-fixes: 03a3780b0c82183110dbea7c7037a61686685511(fails)
    drm/i915: Fix GMBUSFREQ on vlv/chv

==Bug detailed description==
igt/pm_rc6_residency/rc6-accuracy fails

Output:
[root at x-sgb3 tests]# ./pm_rc6_residency --run-subtest rc6-accuracy
IGT-Version: 1.8-gac20795 (x86_64) (Linux:
3.18.0-rc1_drm-intel-fixes_03a378_20141024+ x86_64)
The residency counter: 1.005667
Test assertion failure function residency_accuracy, file
pm_rc6_residency.c:129:
Failed assertion: (flag_counter != 0) && (counter_result <=1)
Sysfs RC6 residency counter is inaccurate.
Subtest rc6-accuracy: FAIL (0.000s)

==Reproduce steps==
---------------------------- 
1. ./pm_rc6_residency --run-subtest rc6-accuracy

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