[Bug 95236] [BAT various] kms_flip fails with "inter-flip ts jitter: 0s, 183334usec" or similar time around 180msec

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95236

--- Comment #2 from Zhi Wang <coredump at live.cn> ---
Got one log from ro-bdw-i5-5250u

IGT-Version: 1.15-g87a1dca (x86_64) (Linux:
4.7.0-rc2-gfxbench-RO_Patchwork_1193+ x86_64)
Using monotonic timestamps
Beginning basic-flip-vs-wf_vblank on pipe A, connector DP-1
  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500

basic-flip-vs-wf_vblank on pipe A, connector DP-1: PASSED

Beginning basic-flip-vs-wf_vblank on pipe B, connector DP-1
  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [check_state+0x32b]
  #2 [<unknown>+0x32b]
Subtest basic-flip-vs-wf_vblank: FAIL (7.965s)


Stderr (kms_flip:8214) CRITICAL: Test assertion failure function check_state,
file kms_flip.c:698:
(kms_flip:8214) CRITICAL: Failed assertion: fabs((((double) diff.tv_usec) -
usec_interflip) / usec_interflip) <= 0.005
(kms_flip:8214) CRITICAL: Last errno: 25, Inappropriate ioctl for device
(kms_flip:8214) CRITICAL: inter-vblank ts jitter: 0s, 216663usec
Subtest basic-flip-vs-wf_vblank failed

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