[Bug 89936] New: [BSW Regression]Run Cairo Performance case will result GPU HANG: ecode 8:0:0x85dffffb, in X [4370], reason: Ring hung

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89936

            Bug ID: 89936
           Summary: [BSW Regression]Run Cairo Performance case will result
                    GPU HANG: ecode 8:0:0x85dffffb, in X [4370], reason:
                    Ring hung
           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: wendy.wang at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114914
  --> https://bugs.freedesktop.org/attachment.cgi?id=114914&action=edit
GPU_HANG_dmesg_cairo_case

System Environment:       
--------------------
Failed Platform: Braswell
Kernel Regression: Yes, 
but cannot bisect because of the bug between the good and bad commit.
89350 [BSW bisected] kernel fails to start up

Kernel:
Good commit: drm-intel-nightly branch 2015-02-10 kernel
Bad commit: drm-intel-nightly branch from 2015-03-10 to the latest kernel
commit

Description:
Run cairo performance, check dmesg will see GPU HANG error message:
GPU HANG: ecode 8:0:0x85dffffb, in X [4370], reason: Ring hung, action: reset
[  119.815835] [drm:i915_reset_and_wakeup] resetting chip
[  119.815956] [drm:i915_context_is_banned [i915]] *ERROR* gpu hanging too
fast, banning!
[  119.817187] drm/i915: Resetting chip after gpu hang

Dmesg file has been attached.

Reproduce Steps:
1. cd /home/cairo/perf 
2. vblank_mode=0 CAIRO_TEST_TARGET=xlib ./cairo-perf-trace
/home/cairo-traces/benchmark/firefox-chalkboard.trace

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