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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [IGT][All] Performance degradation due to fence contention with igt/gem_fence_upload"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80079#c86">Comment # 86</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [IGT][All] Performance degradation due to fence contention with igt/gem_fence_upload"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80079">bug 80079</a>
from <span class="vcard"><a class="email" href="mailto:octaviox.hernandez.lopez@intel.com" title="Octavio <octaviox.hernandez.lopez@intel.com>"> <span class="fn">Octavio</span></a>
</span></b>
<pre>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 ****</pre>
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