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igt@gem_exec_fair@.* - fail - Failed assertion: result[nchild / 2] > frame_ns / 2, Median client interval .*ms did not match target interval 16.67ms

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_735/fi-bdw-5557u/igt@gem_exec_fair@basic-throttle@rcs0.html

- Err	
- Starting subtest: basic-throttle
- Starting dynamic subtest: rcs0
- (gem_exec_fair:1104) CRITICAL: Test assertion failure function fairness, file ../tests/i915/gem_exec_fair.c:788:
- (gem_exec_fair:1104) CRITICAL: Failed assertion: result[nchild / 2] > frame_ns / 2
- (gem_exec_fair:1104) CRITICAL: Median client interval 7.63ms did not match target interval 16.67ms
- Dynamic subtest rcs0 failed.
- **** DEBUG ****
- (gem_exec_fair:1104) DEBUG: Test requirement passed: has_ctx_timestamp(i915, e)
- (gem_exec_fair:1104) DEBUG: Test requirement passed: gem_class_has_mutable_submission(i915, e->class)
- (gem_exec_fair:1104) DEBUG: CPU usage: 3%
- (gem_exec_fair:1104) DEBUG: CPU usage: 11%
- (gem_exec_fair:1104) INFO:   3 clients, range: [7.6, 10.0], iqr: [7.6, 10.0], median: 9.6 [7.8, 13.6], mean: 9.0 ± 1.05 ms, cpu: 11%
- (gem_exec_fair:1104) DEBUG: CPU usage: 29%
- (gem_exec_fair:1104) INFO:   7 clients, range: [5.1, 10.7], iqr: [6.0, 9.6], median: 7.6 [3.6, 8.5], mean: 7.8 ± 1.91 ms, cpu: 29%
- (gem_exec_fair:1104) CRITICAL: Test assertion failure function fairness, file ../tests/i915/gem_exec_fair.c:788:
- (gem_exec_fair:1104) CRITICAL: Failed assertion: result[nchild / 2] > frame_ns / 2
- (gem_exec_fair:1104) CRITICAL: Median client interval 7.63ms did not match target interval 16.67ms
- (gem_exec_fair:1104) igt_core-INFO: Stack trace:
- (gem_exec_fair:1104) igt_core-INFO:   #0 ../lib/igt_core.c:1727 __igt_fail_assert()
- (gem_exec_fair:1104) igt_core-INFO:   #1 ../tests/i915/gem_exec_fair.c:780 fairness()
- (gem_exec_fair:1104) igt_core-INFO:   #2 ../tests/i915/gem_exec_fair.c:1171 __real_main1052()
- (gem_exec_fair:1104) igt_core-INFO:   #3 ../tests/i915/gem_exec_fair.c:1052 main()
- (gem_exec_fair:1104) igt_core-INFO:   #4 ../csu/libc-start.c:344 __libc_start_main()
- (gem_exec_fair:1104) igt_core-INFO:   #5 [_start+0x2a]
- ****  END  ****
- Dynamic subtest rcs0: FAIL (3.749s)
- Subtest basic-throttle: FAIL (3.749s)
Edited by LAKSHMINARAYANA VUDUM
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