[Bug 110285] New: Stability issue in i915 during continuous 15h transcode workload with MFE

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110285

            Bug ID: 110285
           Summary: Stability issue in i915 during continuous 15h
                    transcode workload with MFE
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: oleg.makarov at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 143808
  --> https://bugs.freedesktop.org/attachment.cgi?id=143808&action=edit
i915_error_state_and_reproducer

GPU hang happened after ~15h.

Environment:
============
OS: Ubuntu18.04.1LTS
KERNEL: 5.0.0
MICROCODE: 0xc6
CPU MODEL: Intel(R) Xeon(R) CPU E3-1578L v5 @ 2.00GHz
ASLR IS ENABLED
HT IS ENABLED
CPU's: 8, THREAD's TO CORE: 2

MediaDriver: https://github.com/intel/media-driver, commit: 2241415
mediasdk: https://github.com/Intel-Media-SDK/MediaSDK, commit dad7abb
gmmlib: https://github.com/intel/gmmlib, commit 8bee050
libva-utils: https://github.com/intel/libva-utils, commit 72dab0c
libva: https://github.com/intel/libva, commit a99bab1
Kernel commit:  1c163f4c7b3f621efff9b28a47abb36f7378d783

Suspected commit: f36c071f6344e0a335ed4b4e0b3a38c0dd54648b:

Commit description:
drm/i915/ringbuffer: Clear semaphore sync registers on ring init
Ensure that the sync registers are cleared every time we restart the
ring to avoid stale values from creeping in from random neutrinos.

cat /proc/cmdline:
\boot\vmlinuz-5.0.0 root=LABEL=TARGET_OS ro vconsole.font=latarcyrheb-sun16
crashkernel=128M vconsole.keymap=us biosdevname=0 LANG=en_US.UTF-8
systemd.debug modprobe.blacklist=ast,mgag200 intel_pstate=disable
intel_idle.max_cstate=1 enable_rc6=0 initrd=boot\initrd.img-5.0.0 

GPU hang doesn't reproduce on Kernel 4.19.5.

Command line for reproducing and "i915 error state" are in the attachment.

For reproducing you can get the streams from http://fate-suite.ffmpeg.org/

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