[Bug 76877] [all] igt/pm_rc6_residency/*-accuracy isn't an accurate testcase.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76877

--- Comment #17 from lu hua <huax.lu at intel.com> ---
It still fails on BYT, but it works well on other platforms.
output on BYT:
IGT-Version: 1.10-g308b0e8 (x86_64) (Linux:
4.1.0-rc3_drm-intel-nightly_056608_20150519+ x86_64)
Residency in rc6 or deeper state: 3340 ms (ratio to expected duration: 1.10)
Test assertion failure function residency_accuracy, file
pm_rc6_residency.c:109:
Failed assertion: ratio > 0.9 && ratio <= 1
Sysfs RC6 residency counter is inaccurate.
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [readit+0x0]
  #2 [__real_main178+0x10d]
  #3 [main+0x29]
  #4 [__libc_start_main+0xf5]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest rc6-accuracy failed.
**** DEBUG ****
Test requirement passed: !(!(rc6_mask & RC6_ENABLED))
Residency in rc6 or deeper state: 3340 ms (ratio to expected duration: 1.10)
Test assertion failure function residency_accuracy, file
pm_rc6_residency.c:109:
Failed assertion: ratio > 0.9 && ratio <= 1
Sysfs RC6 residency counter is inaccurate.
****  END  ****
Subtest rc6-accuracy: FAIL (0.002s)
Residency in media_rc6 or deeper state: 3341 ms (ratio to expected duration:
1.10)
Test assertion failure function residency_accuracy, file
pm_rc6_residency.c:109:
Failed assertion: ratio > 0.9 && ratio <= 1
Last errno: 22, Invalid argument
Sysfs RC6 residency counter is inaccurate.
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [readit+0x0]
  #2 [__real_main178+0x190]
  #3 [main+0x29]
  #4 [__libc_start_main+0xf5]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest media-rc6-accuracy failed.
**** DEBUG ****
Test requirement passed: !(!((rc6_mask & RC6_ENABLED) && (IS_VALLEYVIEW(devid)
|| IS_CHERRYVIEW(devid))))
Residency in media_rc6 or deeper state: 3341 ms (ratio to expected duration:
1.10)
Test assertion failure function residency_accuracy, file
pm_rc6_residency.c:109:
Failed assertion: ratio > 0.9 && ratio <= 1
Last errno: 22, Invalid argument
Sysfs RC6 residency counter is inaccurate.
****  END  ****
Subtest media-rc6-accuracy: FAIL (0.003s)
Test requirement not met in function __real_main178, file
pm_rc6_residency.c:209:
Test requirement: !(!(rc6_mask & RC6P_ENABLED))
Last errno: 22, Invalid argument
Subtest rc6p-accuracy: SKIP (0.000s)
Test requirement not met in function __real_main178, file
pm_rc6_residency.c:214:
Test requirement: !(!(rc6_mask & RC6PP_ENABLED))
Last errno: 22, Invalid argument
Subtest rc6pp-accuracy: SKIP (0.000s)

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