[Bug 102566] New: [IGT][KBL] pm_rc6_residency at rc6-accuracy is failing with assertion: ratio > 0.9 && ratio <= 1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102566

            Bug ID: 102566
           Summary: [IGT][KBL] pm_rc6_residency at rc6-accuracy is failing
                    with assertion: ratio > 0.9 && ratio <= 1
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: armando.antoniox.mora.reos at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

The following test cases fail on KBL with latest configuration.

=====================================
Test list
=====================================
igt at pm_rc6_residency@rc6-accuracy

======================================
             Software
======================================
kernel version              : 4.13.0-drm-tip-ww36-commit-59fbfaa+
hostname                    : gfx-desktop
architecture                : x86_64
os version                  : Ubuntu 16.10
os codename                 : yakkety
kernel driver               : i915
bios revision               : 5.12
bios release date           : 09/12/2016
hardware acceleration       : disabled
swap partition              : enabled on (/dev/sda3)

======================================
        Graphic drivers
======================================
grep: /opt/X11R7/var/log/Xorg.0.log: No such file or directory
libdrm                      : 2.4.83
cairo                       : 1.15.9
intel-gpu-tools (tag)       : intel-gpu-tools-1.19-234-g490b386
intel-gpu-tools (commit)    : 490b386

======================================
             Hardware
======================================
platform                   : Kabylake-Nuc
motherboard model          : MS-B142
motherboard id             : MS-B1421
form factor                : Desktop
manufacturer               : Micro-StarInternationalCo.,Ltd.
cpu family                 : Core i7
cpu family id              : 6
cpu information            : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
gpu card                   : Intel Corporation Device 5916 (rev 02) (prog-if 00
[VGA controller])
memory ram                 : 15.55 GB
max memory ram             : 64 GB
cpu thread                 : 4
cpu core                   : 2
cpu model                  : 142
cpu stepping               : 9
socket                     : Other
signature                  : Type 0, Family 6, Model 142, Stepping 9
hard drive                 : 111GiB (120GB)
current cd clock frequency : 337500 kHz
maximum cd clock frequency : 675000 kHz
displays connected         : DP-1 HDMI-A-2

======================================
             Firmware
======================================
dmc fw loaded             : yes
dmc version               : 1.1
guc fw loaded             : SUCCESS
guc version wanted        : 9.14
guc version found         : 9.14

======================================
             kernel parameters
======================================
drm.debug=0x1e quiet splash i915.enable_guc_submission=2
i915.enable_guc_loading=2 i915.alpha_support=1

======================================
output sample
======================================
Residency in rc6 or deeper state: 0 ms (sleep duration 3000 ms) (ratio to
expected duration: 0.00)
(pm_rc6_residency:2078) CRITICAL: Test assertion failure function
residency_accuracy, file pm_rc6_residency.c:86:
(pm_rc6_residency:2078) CRITICAL: Failed assertion: ratio > 0.9 && ratio <= 1
(pm_rc6_residency:2078) CRITICAL: Sysfs RC6 residency counter is inaccurate.
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [residency_accuracy+0x8e]
  #2 [__real_main168+0x9e]
  #3 [main+0x33]
  #4 [__libc_start_main+0xf1]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest rc6-accuracy failed.

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