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igt@gem_exec_fair@basic-pace - fail - CRITICAL: Test assertion failure function fairness CRITICAL: Failed assertion: result[hi] - result[lo] < result[nchild / 2]

log on intel-gfx-ci.01.org

Starting dynamic subtest: rcs0
Dynamic subtest rcs0: SKIP (3.628s)
Starting dynamic subtest: bcs0
Dynamic subtest bcs0: SKIP (3.605s)
Starting dynamic subtest: vcs0
Dynamic subtest vcs0: SKIP (0.000s)
Starting dynamic subtest: vecs0
(gem_exec_fair:1367) CRITICAL: Test assertion failure function fairness, file ../tests/intel/gem_exec_fair.c:974:
(gem_exec_fair:1367) CRITICAL: Failed assertion: result[hi] - result[lo] < result[nchild / 2]
(gem_exec_fair:1367) CRITICAL: Interquartile range of client intervals 16.72ms is as large as the median threshold 13.56ms, clients are not evenly distributed!
Dynamic subtest vecs0 failed.
**** DEBUG ****
(gem_exec_fair:1367) DEBUG: Test requirement passed: has_ctx_timestamp(i915, cfg, e)
(gem_exec_fair:1367) DEBUG: Test requirement passed: gem_class_has_mutable_submission(i915, e->class)
(gem_exec_fair:1367) DEBUG: CPU usage: 19%
(gem_exec_fair:1367) INFO: Interval 16.68ms, range 0.00ms
(gem_exec_fair:1367) DEBUG: CPU usage: 55%
(gem_exec_fair:1367) INFO:   3 clients, range: [11.2, 27.9], iqr: [11.2, 27.9], median: 13.6 [11.1, 22.3], mean: 17.5 ± 7.38 ms, cpu: 55%
(gem_exec_fair:1367) CRITICAL: Test assertion failure function fairness, file ../tests/intel/gem_exec_fair.c:974:```
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