[Bug 111385] (Only partly recoverable) GPU hangs in (multi-context) SynMark HDRBloom & Multithread tests with Iris driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111385

--- Comment #28 from Eero Tamminen <eero.t.tamminen at intel.com> ---
Created attachment 145685
  --> https://bugs.freedesktop.org/attachment.cgi?id=145685&action=edit
ICL-U D1 (recoverable) GPU hang error state

It's been nearly a week with GPU hang recovery working OK.

Same as with bug 111936, drm.debug=0x2 doesn't tell anything extra about this
GPU hang.

Attached is ICL error state from hour old drm-tip & Mesa git versions:
-----------------------------------------------------------------
[    7.334758] fuse: init (API version 7.31)
[   98.083248] Iteration 1/3: synmark2 OglHdrBloom
[  106.009380] i915 0000:00:02.0: GPU HANG: ecode 11:1:0x00000000, hang on rcs0
[  106.009383] GPU hangs can indicate a bug anywhere in the entire gfx stack,
including userspace.
[  106.009384] Please file a _new_ bug report on bugs.freedesktop.org against
DRI -> DRM/Intel
[  106.009385] drm/i915 developers can then reassign to the right component if
it's not a kernel issue.
[  106.009386] The GPU crash dump is required to analyze GPU hangs, so please
always attach it.
[  106.009387] GPU crash dump saved to /sys/class/drm/card0/error
[  106.009451] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  114.006297] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  122.006304] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  130.008231] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  130.127016] Iteration 2/3: synmark2 OglHdrBloom
[  138.006291] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  146.006294] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  154.007309] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  162.007300] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  162.122292] Iteration 3/3: synmark2 OglHdrBloom
[  170.006292] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  178.006295] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  186.006294] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  194.007291] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
-----------------------------------------------------------------

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