[Bug 85672] [BYT]igt/gem_cpu_reloc sporadically fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85672

--- Comment #2 from lu hua <huax.lu at intel.com> ---
(In reply to Chris Wilson from comment #1)
> drm.debug=7 dmesg?

Only reproduce once as above and didn't save dmesg.
I run it more than 10 cycles just now, I can't reproduce the fail. 
It also fails when run automation testing, the log as below:

Dmesg:
<6>[ 2060.756282] [drm] stuck on render ring
<6>[ 2060.799888] [drm] GPU HANG: ecode 0:0x00000000, in gem_cpu_reloc [1443],
reason: Ring hung, action: reset
<6>[ 2060.799893] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
<6>[ 2060.799896] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
<6>[ 2060.799898] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
<6>[ 2060.799900] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
<6>[ 2060.799903] [drm] GPU crash dump saved to /sys/class/drm/card0/error
<5>[ 2060.813413] drm/i915: Resetting chip after gpu hang
<6>[ 2071.773663] [drm] stuck on render ring
<6>[ 2071.800593] [drm] GPU HANG: ecode 0:0x00000000, in gem_cpu_reloc [1443],
reason: Ring hung, action: reset
<3>[ 2071.800794] [drm:i915_set_reset_status.part.30 [i915]] *ERROR* gpu
hanging too fast, banning!
<5>[ 2071.810344] drm/i915: Resetting chip after gpu hang


Output:
             command   pid dev master a   uid      magic
Test Environment check: Succeeded.
[1/1] dmesg-fail: 1 Running Test(s): 0
[1/1] dmesg-fail: 1 Running Test(s): 1
Thank you for running Piglit!
Results have been written to /GFX/Test/Piglit/piglit/t
{
    "results_version": 1,
    "time_elapsed": 25.40916419029236,
    "tests": {
        "igt/gem_cpu_reloc": {
            "dmesg": "[ 2060.813413] drm/i915: Resetting chip after gpu hang\n[
2071.800794] [drm:i915_set_reset_status.part.30 [i915]] *ERROR* gpu hanging too
fast, banning!\n[ 2071.810344] drm/i915: Resetting chip after gpu hang",
            "returncode": 99,
            "err": "",
            "environment": "PIGLIT_SOURCE_DIR=\"/GFX/Test/Piglit/piglit\"
PIGLIT_PLATFORM=\"mixed_glx_egl\"",
            "command":
"/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests/gem_cpu_reloc",
            "result": "dmesg-fail",
            "time": 25.231271028518677,
            "out": "IGT-Version: 1.8-gab5f7ea (x86_64) (Linux:
3.18.0-rc2_drm-intel-nightly_bd21cf_20141030+ x86_64)\nTest assertion failure
function exec, file gem_cpu_reloc.c:120:\nFailed assertion: (drmIoctl(fd,
(((1U) << (((0+8)+8)+14)) | ((('d')) << (0+8)) | (((0x40 + 0x29)) << 0) |
((((sizeof(struct drm_i915_gem_execbuffer2)))) << ((0+8)+8))), &execbuf)) ==
0\nLast errno: 5, Input/output error\n"
        }
    },
    "name": "t",
    "options": {
        "profile": [
            "tests/igt.py"
        ],
        "dmesg": false,
        "execute": true,
        "platform": "mixed_glx_egl",
        "valgrind": false,
        "sync": false,
        "filter": [
            "igt/gem_cpu_reloc$"
        ],
        "concurrent": "some",
        "exclude_tests": [],
        "env": {
            "lspci": "00:00.0 Host bridge: Intel Corporation ValleyView
SSA-CUnit\n00:02.0 VGA compatible controller: Intel Corporation ValleyView
Gen7\n00:13.0 SATA controller: Intel Corporation ValleyView 6-Port SATA AHCI
Controller\n00:14.0 USB controller: Intel Corporation ValleyView USB xHCI Host
Controller\n00:1a.0 Encryption controller: Intel Corporation ValleyView
SEC\n00:1b.0 Audio device: Intel Corporation ValleyView High Definition Audio
Controller\n00:1c.0 PCI bridge: Intel Corporation ValleyView PCI Express Root
Port\n00:1c.1 PCI bridge: Intel Corporation ValleyView PCI Express Root
Port\n00:1c.2 PCI bridge: Intel Corporation ValleyView PCI Express Root
Port\n00:1c.3 PCI bridge: Intel Corporation ValleyView PCI Express Root
Port\n00:1f.0 ISA bridge: Intel Corporation ValleyView Power Control
Unit\n00:1f.3 SMBus: Intel Corporation ValleyView SMBus Controller\n01:00.0
Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet Controller
(Copper) (rev 06)\n",
            "uname": "Linux x-byt06
3.18.0-rc2_drm-intel-nightly_bd21cf_20141030+ #998 SMP Thu Oct 30 11:24:33 CST
2014 x86_64 x86_64 x86_64 GNU/Linux\n"
        },
        "exclude_filter": []
    }
}

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