[Bug 80079] [All] Performance degradation due to fence contention with igt/gem_fence_upload

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80079

--- Comment #76 from Hector Velazquez <hector.franciscox.velazquez.suriano at intel.com> ---
This test are failing on CFL-S-1 QA

Tests List:

igt at gem_fence_upload@performance
igt at gem_fence_upload@thread-performance-write


====================================================
Output
====================================================
. . .
**** DEBUG ****
(gem_fence_upload:4406) drmtest-DEBUG: Test requirement passed: !(fd<0)
(gem_fence_upload:4406) igt-debugfs-DEBUG: Opening debugfs directory
'/sys/kernel/debug/dri/0'
(gem_fence_upload:4406) DEBUG: Test requirement passed: num_fences > 0
(gem_fence_upload:4406) INFO: Upload rate for 2 linear surfaces, 2 threads:    
4177.000MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 2 tiled surfaces, 2 threads:     
8443.272MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 4 linear surfaces, 4 threads:    
7117.438MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 4 tiled surfaces, 4 threads:     
7521.448MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 8 linear surfaces, 8 threads:    
7743.497MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 8 tiled surfaces, 8 threads:     
7834.976MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 16 linear surfaces, 16 threads:  
7957.972MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 16 tiled surfaces, 16 threads:   
7929.870MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 32 linear surfaces, 32 threads:  
7980.299MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 32 tiled surfaces, 32 threads:   
7927.660MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 64 linear surfaces, 64 threads:  
8036.478MiB/s
(gem_fence_upload:4406) INFO: Upload rate for 64 tiled surfaces, 64 threads:   
1473.776MiB/s
(gem_fence_upload:4406) CRITICAL: Test assertion failure function
thread_performance, file gem_fence_upload.c:242:
(gem_fence_upload:4406) CRITICAL: Failed assertion: tiled[1] > 0.75 * tiled[0]
(gem_fence_upload:4406) igt-core-INFO: Stack trace:
(gem_fence_upload:4406) igt-core-INFO:   #0 [__igt_fail_assert+0x101]
(gem_fence_upload:4406) igt-core-INFO:   #1 [thread_performance+0x6fa]
(gem_fence_upload:4406) igt-core-INFO:   #2 [__real_main389+0x4fa]
(gem_fence_upload:4406) igt-core-INFO:   #3 [main+0x23]
(gem_fence_upload:4406) igt-core-INFO:   #4 [__libc_start_main+0xf1]
(gem_fence_upload:4406) igt-core-INFO:   #5 [_start+0x29]
(gem_fence_upload:4406) igt-core-INFO:   #6 [<unknown>+0x29]
****  END  ****
. . .


This is my configuration:

======================================
        Graphic stack
======================================
Component: drm
    tag: libdrm-2.4.81-56-g7c71188
    commit: 7c71188610b4ceba0339c2bc884320bcb749adee

Component: cairo
    tag: 1.15.6-42-gdccbed7
    commit: dccbed7d78d32bd3b912e8810379451dd94e6a1f

Component: intel-gpu-tools
    tag: intel-gpu-tools-1.19-334-g2885b10
    commit: 2885b10f99b4beeb046e75af8b8488c229f629d3

Component: piglit
    tag: piglit-v1
    commit: e1f66fb2fb8ad781ca755831983b6662c4c440d4

======================================
             Software
======================================
kernel version              : 4.14.0-rc2-drm-tip-ww39-commit-85932e1+
hostname                    : CFL-S-1
architecture                : x86_64
os version                  : Ubuntu 16.10
os codename                 : yakkety
kernel driver               : i915
bios revision               : 104.3
bios release date           : 09/14/2017
ksc                         : 1.5
hardware acceleration       : disabled
swap partition              : enabled on (/dev/sda3
/dev/nvme0n1p3)

======================================
        Graphic drivers
======================================
libdrm                      : 2.4.83
cairo                       : 1.15.9
intel-gpu-tools (tag)       : intel-gpu-tools-1.19-334-g2885b10
intel-gpu-tools (commit)    : 2885b10

======================================
             Hardware
======================================
motherboard model          : CoffeeLakeClientPlatform
motherboard id             : CoffeeLakeSUDIMMRVP
form factor                : Desktop
manufacturer               : IntelCorporation
cpu family                 : Other
cpu family id              : 6
cpu information            : Genuine Intel(R) CPU 0000 @ 3.60GHz
gpu card                   : Intel Corporation Device 3e92 (prog-if 00 [VGA
controller])
memory ram                 : 15.58 GB
max memory ram             : 32 GB
cpu thread                 : 12
cpu core                   : 6
cpu model                  : 158
cpu stepping               : 10
socket                     : Other
hard drive                 : 111GiB (120GB)
current cd clock frequency : 337500 kHz
maximum cd clock frequency : 675000 kHz
displays connected         : eDP-1 DP-1

======================================
             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
======================================
quiet drm.debug=0xe pci=pcie_bus_safe intel_iommu=igfx_off auto panic=1
nmi_watchdog=panic i915.alpha_support=1 i915.enable_guc_loading=2
i915.enable_guc_submission=2 resume=/dev/sda3 fastboot

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