[Bug 81858] [BYT/BDW/BSW Regression]igt/pm_rps some subcases fail and cause " [drm:i915_context_is_banned] *ERROR* gpu hanging too fast, banning!"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81858

--- Comment #5 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #2)
> Created attachment 105721 [details]
> dmesg
> 
> Test failed on BDW too.
> 
> root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rps
> --run-subtest blocking
> IGT-Version: 1.7-gf473a55 (x86_64) (Linux:
> 3.17.0-rc2_drm-intel-nightly_4144c9_20140904+ x86_64)
> Test assertion failure function emit_store_dword_imm, file pm_rps.c:193:
> Failed assertion: batch->ptr == batch->end
> Subtest blocking: FAIL
> Test assertion failure function load_helper_stop, file pm_rps.c:254:
> Failed assertion: igt_wait_helper(&lh.igt_proc) == 0
> Subtest blocking: FAIL
> 
> root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time ./pm_rps
> --run-subtest reset
> IGT-Version: 1.7-gf473a55 (x86_64) (Linux:
> 3.17.0-rc2_drm-intel-nightly_4144c9_20140904+ x86_64)
> Test assertion failure function emit_store_dword_imm, file pm_rps.c:193:
> Failed assertion: batch->ptr == batch->end
> Subtest reset: FAIL
> 
> ^CTest assertion failure function load_helper_stop, file pm_rps.c:254:
> Failed assertion: igt_wait_helper(&lh.igt_proc) == 0
> Last errno: 10, No child processes
> Subtest reset: FAIL
> pm_rps: igt_core.c:891: fork_helper_exit_handler: Assertion
> `helper_process_count == 0' failed.
> Aborted
> 
> real    17m39.073s
> user    0m0.015s
> sys     0m0.039s
> root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep
> "<[1-4]>"|grep drm

commit 3a1751ef34c32c5d288a328d855bec49ad0eaf9f
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Sep 12 06:46:28 2014 +0100

    igt/pm_rps: Fix the batch count for emitting the flush

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81858#c2
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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