[Bug 75079] [PNV/BSW Bisected]igt/kms_pipe_crc_basic/read-crc-pipe-A-frame-sequence is slow

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75079

--- Comment #11 from lu hua <huax.lu at intel.com> ---
Created attachment 109014
  --> https://bugs.freedesktop.org/attachment.cgi?id=109014&action=edit
dmesg(BSW)


> What is this? You say BSW, hostname says hsw. BSW does not support VGA. So
> please retest on BSW and attach the correct log.

Both BDW and BSW have this issue. comment 6's bug 77475 mentioned HSW. Comment
8 says BSW also has this issue, in order to illustrate BSW's test status. 

Test on BSW with latest -nightly kernel, the timeout is unstable.
output:
[root at x-bsw01 tests]# time ./kms_pipe_crc_basic --run-subtest
read-crc-pipe-A-frame-sequence
IGT-Version: 1.8-ga973aab (x86_64) (Linux:
3.18.0-rc3_drm-intel-nightly_0642a5_20141106+ x86_64)
read-crc-pipe-A-frame-sequence: Testing connector eDP-1 using pipe A
Test assertion failure function test_read_crc_for_output, file
kms_pipe_crc_basic.c:188:
Failed assertion: igt_crc_equal(&crcs[j], &crcs[j + 1])
Subtest read-crc-pipe-A-frame-sequence: FAIL (2.051s)

real    0m4.587s
user    0m0.010s
sys     0m0.074s
[root at x-bsw01 tests]# time ./kms_pipe_crc_basic --run-subtest
read-crc-pipe-A-frame-sequence
IGT-Version: 1.8-ga973aab (x86_64) (Linux:
3.18.0-rc3_drm-intel-nightly_0642a5_20141106+ x86_64)
read-crc-pipe-A-frame-sequence: Testing connector eDP-1 using pipe A
Subtest read-crc-pipe-A-frame-sequence: TIMEOUT (6.993s)

real    0m9.537s
user    0m0.015s
sys     0m0.062s

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