[Bug 80079] [IGT][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 #86 from Octavio <octaviox.hernandez.lopez at intel.com> ---
The below test fails on CFL QA

IGT-Version: 1.21-g68fb759 (x86_64) (Linux:
4.16.0-rc4-drm-intel-qa-ww10-commit-a994c52+ x86_64)

(gem_fence_upload:1482) CRITICAL: Test assertion failure function
thread_contention, file gem_fence_upload.c:330:
(gem_fence_upload:1482) CRITICAL: Failed assertion: tiled[1] > 0.75 * tiled[0]
Subtest thread-contention failed.
**** DEBUG ****
(gem_fence_upload:1482) drmtest-DEBUG: Test requirement passed: !(fd<0)
(gem_fence_upload:1482) igt-debugfs-DEBUG: Opening debugfs directory
'/sys/kernel/debug/dri/0'
(gem_fence_upload:1482) DEBUG: Test requirement passed: num_fences > 0
(gem_fence_upload:1482) INFO: Contended upload rate for 1 linear threads:      
402.901MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 1 tiled threads:       
434.181MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 2 linear threads:      
361.754MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 2 tiled threads:       
380.174MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 4 linear threads:      
350.702MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 4 tiled threads:       
339.977MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 8 linear threads:      
356.625MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 8 tiled threads:       
359.993MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 16 linear threads:     
325.443MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 16 tiled threads:      
327.816MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 32 linear threads:     
325.611MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 32 tiled threads:      
327.981MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 64 linear threads:     
320.328MiB/s
(gem_fence_upload:1482) INFO: Contended upload rate for 64 tiled threads:      
282.466MiB/s
(gem_fence_upload:1482) CRITICAL: Test assertion failure function
thread_contention, file gem_fence_upload.c:330:
(gem_fence_upload:1482) CRITICAL: Failed assertion: tiled[1] > 0.75 * tiled[0]
(gem_fence_upload:1482) igt-core-INFO: Stack trace:
(gem_fence_upload:1482) igt-core-INFO:   #0 [__igt_fail_assert+0x101]
(gem_fence_upload:1482) igt-core-INFO:   #1 [__real_main389+0xce9]
(gem_fence_upload:1482) igt-core-INFO:   #2 [main+0x23]
(gem_fence_upload:1482) igt-core-INFO:   #3 [__libc_start_main+0xf1]
(gem_fence_upload:1482) igt-core-INFO:   #4 [_start+0x29]
(gem_fence_upload:1482) igt-core-INFO:   #5 [<unknown>+0x29]
****  END  ****

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