Bug 95236

Summary:	[BAT various] kms_flip fails with "inter-flip ts jitter: 0s, 183334usec" or similar time around 180msec
Product:	DRI	Reporter:	Daniel Vetter <daniel>
Component:	DRM/Intel	Assignee:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Status:	CLOSED FIXED	QA Contact:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity:	normal
Priority:	highest	CC:	intel-gfx-bugs
Version:	XOrg git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:	BDW, BSW/CHT, BYT, ILK, SNB	i915 features:	display/Other

Description Daniel Vetter 2016-05-02 08:16:06 UTC

Various machines seem to be affected on various testcases. Looking at igt@kms_flip@basic-flip-vs-wf_vblank affected machines are bsw-nuc-2, bdw-ultra, byt-nuc, snb-x220t, ild-hp8440p. There might be more. Example log from igt:

 	

(kms_flip:6410) CRITICAL: Test assertion failure function check_state, file kms_flip.c:698:
(kms_flip:6410) CRITICAL: Failed assertion: fabs((((double) diff.tv_usec) - usec_interflip) / usec_interflip) <= 0.005
(kms_flip:6410) CRITICAL: Last errno: 25, Inappropriate ioctl for device
(kms_flip:6410) CRITICAL: inter-vblank ts jitter: 0s, 183335usec
Subtest basic-flip-vs-wf_vblank failed.

Comment 1 Dave Gordon 2016-06-14 13:41:44 UTC

Example from bdw-i7-5600u:

IGT-Version: 1.15-gbc570aa (x86_64) (Linux: 4.7.0-rc2-gfxbench-RO_Patchwork_1178+ x86_64)
Using monotonic timestamps
Beginning basic-flip-vs-wf_vblank on pipe A, connector eDP-1
  1920x1080 60 1920 1968 2000 2080 1080 1083 1088 1111 0x9 0x48 138700
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [check_state+0x32b]
  #2 [<unknown>+0x32b]
Subtest basic-flip-vs-wf_vblank: FAIL (4.838s)

(kms_flip:7666) CRITICAL: Test assertion failure function check_state, file kms_flip.c:698:
(kms_flip:7666) CRITICAL: Failed assertion: fabs((((double) diff.tv_usec) - usec_interflip) / usec_interflip) <= 0.005
(kms_flip:7666) CRITICAL: Last errno: 25, Inappropriate ioctl for device
(kms_flip:7666) CRITICAL: inter-vblank ts jitter: 0s, 216597usec
Subtest basic-flip-vs-wf_vblank failed.

Somewhat longer than 180ms in this example, but otherwise very similar.

Comment 2 Zhi Wang 2016-06-16 12:43:17 UTC

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

Comment 3 Jari Tahvanainen 2016-09-01 09:27:05 UTC

This failure (for igt@kms_flip@basic-flip-vs-wf) has not been visible in Patchwork Intel GFX CI Testing during last week. I propose this to be closed as Resolved + Worksforme. Please comment if you disagree.

Comment 4 yann 2016-09-01 09:37:26 UTC

I confirm this is working also on QA side on all platforms

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