[Bug 73959] New: [BDW]igt/many gem_reset_stats subcases causes [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for forcewake old ack to clear.

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Jan 22 22:57:28 PST 2014


https://bugs.freedesktop.org/show_bug.cgi?id=73959

          Priority: medium
            Bug ID: 73959
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW]igt/many gem_reset_stats subcases causes
                    [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out
                    waiting for forcewake old ack to clear.
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 92639
  --> https://bugs.freedesktop.org/attachment.cgi?id=92639&action=edit
dmesg

System Environment:
--------------------------
Platform: Broadwell
Kernel(drm-intel-nightly)83ac01f486397fd8d319a3e31d1f95beb05037c5

Bug detailed description:
------------------------- 
Many gem_reset_stats subcases causes [drm:__gen6_gt_force_wake_mt_get] *ERROR*
Timed out waiting for forcewake old ack to clear.
These subcases are new cases.

run it on Broadwell wiht -nightly kernel.

run ./gem_reset_stats --run-subtest ban-ctx-render
output:
IGT-Version: 1.5-g1bbb607 (x86_64) (Linux:
3.13.0-rc8_drm-intel-nightly_83ac01_20140123+ x86_64)
Subtest ban-ctx-render: SUCCESS

dmesg -r | egrep "<[1-3]>" |grep drm
<3>[    2.004178] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  536.559270] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  536.572264] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  536.581261] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  536.590257] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  542.526239] [drm:i915_context_is_banned] *ERROR* context hanging too
fast, declaring banned!
<3>[  542.539123] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  542.553117] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  543.333157] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.
<3>[  543.342834] [drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting
for forcewake old ack to clear.

Reproduce steps:
-------------------------
1. ./gem_reset_stats --run-subtest ban-ctx-render

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