[Bug 98553] [IVB] performance failure when running kms_setmode basic

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98553

--- Comment #10 from Jari Tahvanainen <jari.tahvanainen at intel.com> ---
Still valid for 4.11.0-rc4-drm-tip-qa-ww13-commit-5c7479a+ (IVB-1-0XR1GT)

./kms_setmode --run-subtest basic
IGT-Version: 1.18-ga27c743 (x86_64) (Linux:
4.11.0-rc4-drm-tip-qa-ww13-commit-5c7479a+ x86_64)
Testing: basic 1 connector combinations
  Test id#1 CRTC count 1
    CRTC[32] [Pipe A] Mode: 1920x1200 at 60Hz Connectors: VGA-1[47]
Expected frametime: 16681us; measured 16626.4us +- 2.753us accuracy 0.05% [0.61
scanlines]
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [test_combinations+0x10b8]
  #2 [main+0x1f5]
  #3 [__libc_start_main+0xf1]
  #4 [_start+0x29]
  #5 [<unknown>+0x29]
Subtest basic: FAIL (2.170s)

(kms_setmode:17155) CRITICAL: Test assertion failure function check_timings,
file kms_setmode.c:521:
(kms_setmode:17155) CRITICAL: Failed assertion: fabs(mean - expected) < 1.718 *
stddev
(kms_setmode:17155) CRITICAL: vblank interval differs from modeline! expected
16680.5us, measured 16626us +- 2.753us, difference 54.1us (19.6 sigma)
Subtest basic failed.
**** DEBUG ****
(kms_setmode:17155) INFO: Testing: basic 1 connector combinations
(kms_setmode:17155) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1920,
height=1200, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:17155) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=1,
pitch=7680)
(kms_setmode:17155) INFO:   Test id#1 CRTC count 1
(kms_setmode:17155) INFO:     CRTC[32] [Pipe A] Mode: 1920x1200 at 60Hz
Connectors: VGA-1[47]
(kms_setmode:17155) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1920,
height=1200, format=0x34325258, tiling=0x0, size=0)
(kms_setmode:17155) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=2,
pitch=7680)
(kms_setmode:17155) INFO: Expected frametime: 16681us; measured 16626.4us +-
2.753us accuracy 0.05% [0.61 scanlines]
(kms_setmode:17155) CRITICAL: Test assertion failure function check_timings,
file kms_setmode.c:521:
(kms_setmode:17155) CRITICAL: Failed assertion: fabs(mean - expected) < 1.718 *
stddev
(kms_setmode:17155) CRITICAL: vblank interval differs from modeline! expected
16680.5us, measured 16626us +- 2.753us, difference 54.1us (19.6 sigma)
****  END  ****

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