[Bug 90045] [BDW/BSW/SKL]igt/gem_exec_big fails and causes [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... render ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90045

--- Comment #1 from ye.tian <yex.tian at intel.com> ---
Tested it on BDW with the latest nightly kernel(d60065)and the latest
igt(gbeddb3b). this case still fails, but I didn't find the Hangcheck.

output:
----------------
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time
./gem_exec_big
IGT-Version: 1.10-gbeddb3b (x86_64) (Linux:
4.0.0_drm-intel-nightly_d60065_20150417+ x86_64)
Test assertion failure function gem_create, file ioctl_wrappers.c:426:
Failed assertion: drmIoctl((fd), ((((2U|1U) << (((0+8)+8)+14)) | ((('d')) <<
(0+8)) | (((0x40 + 0x1b)) << 0) | ((((sizeof(struct 

drm_i915_gem_create)))) << ((0+8)+8)))), (&create)) == 0
Last errno: 12, Cannot allocate memory
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [gem_create+0x68]
  #2 [main+0x85]
  #3 [__libc_start_main+0xf5]
  #4 [_start+0x29]
  #5 [<unknown>+0x29]
Test gem_exec_big failed.
**** DEBUG ****
batch_size 1073741824, reloc_ofs 1072713728

batch_size 1073741824, all 262144 relocs
Test assertion failure function gem_create, file ioctl_wrappers.c:426:
Failed assertion: drmIoctl((fd), ((((2U|1U) << (((0+8)+8)+14)) | ((('d')) <<
(0+8)) | (((0x40 + 0x1b)) << 0) | ((((sizeof(struct 

drm_i915_gem_create)))) << ((0+8)+8)))), (&create)) == 0
Last errno: 12, Cannot allocate memory
****  END  ****
FAIL (18.994s)

real    0m19.425s
user    0m0.398s
sys     0m18.632s

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