[Bug 97978] New: [SKL] GuC 6.1 enabled is causing timeout on IGT basic set

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97978

            Bug ID: 97978
           Summary: [SKL] GuC 6.1 enabled is causing timeout on IGT basic
                    set
           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: elio.martinez.monroy at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 126881
  --> https://bugs.freedesktop.org/attachment.cgi?id=126881&action=edit
Dmesg with load and submission value 2

i'm facing some issue running basic IGT tests with GUC 6.1 enabled, sharing my
configuration.
GuC 6.1: https://01.org/linuxgraphics/downloads/skylake-guc-6.1
Kernel: 4.8.0-rc7_3c9e639/
Commit git_commit=3c9e639197bb52280334830e611082d5b6bfaceb
Intel Gpu Tools : intel-gpu-tools-1.16-36-gd16318a
Hardware:  : Intel(R) Core(TM) i5-6260U CPU @ 1.80GHz
Behavior:

In a 244 test suites, after i got the first time out, all the others tests
still facing the same behavior taking more than 10 minutes to execute, this
causes a time out signal failing the test. Something completely different if i
disable guc deleting values from grub.( i915.enable_guc_loading=2
i915.enable_guc_submission=2)

Steps to reproduce:

Enable guc using grub parameters after installing firmware
(i915.enable_guc_loading=2 i915.enable_guc_submission=2).

Execute IGT Basic
<command line attached>


Example of time out:

 PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
 4238 root      20   0   57984   2276   1888 R 100.0  0.0   7:31.08
kms_addfb_basic
    1 root      20   0  119880   5996   3944 S   0.0  0.0   0:02.84 systemd
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.00 kthreadd
    3 root      20   0       0      0      0 S   0.0  0.0   0:00.00 ksoftirqd/0
    5 root       0 -20       0      0      0 S   0.0  0.0   0:00.00
kworker/0:0H
    7 root      20   0       0      0      0 S   0.0  0.0   0:01.11 rcu_sched
    8 root      20   0       0      0      0 S   0.0  0.0   0:00.00 rcu_bh



Values so far with Guc 6.1 enabled:

Launch IGT basic tests with GuC loaded          pass 220 skip 14 timeout 7
incomplete 1 fail 1 dmesg-warn 1


Values without GUC

Launch IGT basic tests with GuC not loaded              pass 229 skip 13
dmesg-war 1 fail 1 


Attaching dmesg during igt execution with timeouts.

This doesnt happen if subimission=0 on grub parameters. And this load the
firmware with value 2 on load parameter.

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