Created attachment 121302 [details]
dmesg

Subtest fail on BXT with last setup:

Setup:
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Platform: Broxton P A0 Platform
CPU Name : Intel(R) @ 1.2 GHz (family: 6, model: 92, stepping: 8) – 4 cores
SoC : BROXTON-P A0
CRB :  Apollo Lake RVPC1 Fab1 
Reworks : R14, R06C and R16
Monitors: Asus PB287Q (4K), Samsung S24C650

Software:
=========
BIOS (IFWI Version): APLK_IFWI_X64_R_2015_41_5_02 
KSC : 1.02
Linux distribution: Ubuntu 15.10 64 bits
Kernel: drm-intel-nightly 4.4.0 8114b00 from http://cgit.freedesktop.org/drm-intel/
drm: tag libdrm-2.4.66 e342c0f from http://cgit.freedesktop.org/mesa/drm/
mesa: tag mesa-11.0.8 261daab from http://cgit.freedesktop.org/mesa/mesa/
cairo: tag 1.15.2 db8a7f1 from http://cgit.freedesktop.org/cairo
waffle: master bb29b2a from https://github.com/waffle-gl/waffle
xorg-server-macros: master d7acec2 from git://git.freedesktop.org/git/xorg/util/macros
libva: tag libva-1.6.1 cb418f6 from http://cgit.freedesktop.org/libva/
vaapi-intel-driver: tag 1.6.1 2110b3a from http://cgit.freedesktop.org/vaapi/intel-driver
Tools:
======
intel-gpu-tool: tag intel-gpu-tools-1.13 51e965f from http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/

Steps:
======
./pm_rc6_residency --run-subtest rc6-accuracy

Actual results:
===============
IGT-Version: 1.13-NOT-GIT (x86_64) (Linux: 4.4.0-nightly+ x86_64)
Residency in rc6 or deeper state: 0 ms (sleep duration 3748 ms) (ratio to expected duration: 0.00)
(pm_rc6_residency:1327) CRITICAL: Test assertion failure function residency_accuracy, file pm_rc6_residency.c:110:
(pm_rc6_residency:1327) CRITICAL: Failed assertion: ratio > 0.9 && ratio <= 1
(pm_rc6_residency:1327) CRITICAL: Sysfs RC6 residency counter is inaccurate.
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [residency_accuracy+0x86]
  #2 [__real_main192+0x136]
  #3 [main+0x29]
  #4 [__libc_start_main+0xf0]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest rc6-accuracy failed.
**** DEBUG ****
(pm_rc6_residency:1327) DEBUG: Test requirement passed: !(!(rc6_mask & RC6_ENABLED))
(pm_rc6_residency:1327) INFO: Residency in rc6 or deeper state: 0 ms (sleep duration 3748 ms) (ratio to expected duration: 0.00)
(pm_rc6_residency:1327) CRITICAL: Test assertion failure function residency_accuracy, file pm_rc6_residency.c:110:
(pm_rc6_residency:1327) CRITICAL: Failed assertion: ratio > 0.9 && ratio <= 1
(pm_rc6_residency:1327) CRITICAL: Sysfs RC6 residency counter is inaccurate.
****  END  ****
Subtest rc6-accuracy: FAIL (0.003s)

Expected result:
================
test pass