[Bug 83915] New: [IVB/HSW/BDW Bisected]igt/pm_rps subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83915

          Priority: high
            Bug ID: 83915
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB/HSW/BDW Bisected]igt/pm_rps subcases fail
        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 106352
  --> https://bugs.freedesktop.org/attachment.cgi?id=106352&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes.
They are igt regression issue

Non-working platforms: IVB HSW BDW

==kernel==
--------------------------
origin/drm-intel-nightly:43df30da20447e2856b2761215ff274886a9f931(fails)
    drm-intel-nightly: 2014y-09m-12d-15h-35m-20s UTC integration manifest
origin/drm-intel-next-queued:648fb42d1e77cf90cddea2b1cf1f4ac4453e65e6(works)
    drm/i915: Extend BIOS stolen mem handling to all platform
origin/drm-intel-fixes: e76c8c5979021483a3a6b480cfe360c644a403c0(works)
    drm/i915: Fix SRC_COPY width on 830/845g
origin/drm-fixes: 83502a5d34386f7c6973bc70e1c423f55f5a2e3a(works)

==Bug detailed description==
-----------------------------
igt/pm_rps subcases reset and blocking fail

Output:
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rps
--run-subtest reset
IGT-Version: 1.8-g137877f (x86_64) (Linux:
3.17.0-rc4_drm-intel-nightly_43df30_20140916+ x86_64)
Test assertion failure function idle_check, file pm_rps.c:408:
Failed assertion: freqs[CUR] == freqs[MIN]
error: 900 != 100
Subtest reset: FAIL (49.044s)
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rps
--run-subtest blocking
IGT-Version: 1.8-g137877f (x86_64) (Linux:
3.17.0-rc4_drm-intel-nightly_43df30_20140916+ x86_64)
Test assertion failure function idle_check, file pm_rps.c:408:
Failed assertion: freqs[CUR] == freqs[MIN]
error: 900 != 100
Subtest blocking: FAIL (45.020s)

==Reproduce steps==
---------------------------- 
1. ./pm_rps --run-subtest reset

==Bisect results==
----------------------------
Bisect shows: 3a1751ef34c32c5d288a328d855bec49ad0eaf9f is the first bad commit
commit 3a1751ef34c32c5d288a328d855bec49ad0eaf9f
Author:     Chris Wilson <chris at chris-wilson.co.uk>
AuthorDate: Fri Sep 12 06:46:28 2014 +0100
Commit:     Chris Wilson <chris at chris-wilson.co.uk>
CommitDate: Fri Sep 12 06:47:20 2014 +0100

    igt/pm_rps: Fix the batch count for emitting the flush

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81858#c2
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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