igt@perf@i915-ref-count - fail - Failed assertion: ref_count0 == baseline, error: 2 != 1

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_6062/shard-glk5/igt@perf@i915-ref-count.html
Err	
Starting subtest: i915-ref-count
(perf:5175) CRITICAL: Test assertion failure function test_i915_ref_count, file ../tests/i915/perf.c:4870:
(perf:5175) CRITICAL: Failed assertion: ref_count0 == baseline
(perf:5175) CRITICAL: error: 2 != 1
Subtest i915-ref-count failed.
**** DEBUG ****
(perf:5175) DEBUG: baseline ref count (drm fd closed) = 1
(perf:5175) DEBUG: Test requirement passed: intel_perf
(perf:5175) DEBUG: n_eu_slices: 1
(perf:5175) DEBUG: n_eu_sub_slices: 2
(perf:5175) DEBUG: n_eus: 12
(perf:5175) DEBUG: timestamp_frequency = 19200000
(perf:5175) DEBUG: TestOa metric set UUID = dd3fd789-e783-4204-8cd0-b671bbccb0cf
(perf:5175) DEBUG: Test requirement passed: init_sys_info()
(perf:5175) DEBUG: initial ref count with drm_fd open = 3
(perf:5175) DEBUG: ref count after opening i915 perf stream = 4
(perf:5175) DEBUG: ref count after closing drm fd = 3
(perf:5175) DEBUG: read 7128 bytes
(perf:5175) DEBUG: oa-formats
(perf:5175) DEBUG: 0c0ee806 c78ee000 ffffffff 7e19e515
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 0000c956 0000c956 000064ab
(perf:5175) DEBUG: 0000431c 0000431d 0000218f 00008639
(perf:5175) DEBUG: 0000c956 00000325 00000000 0000c956
(perf:5175) DEBUG: 00000000 0000c956 0000c956 0000c948
(perf:5175) DEBUG: read report: reason = c0ee806, timestamp = c78ee000, exponent mask=3fff
(perf:5175) DEBUG: oa-formats
(perf:5175) DEBUG: 0c0ee806 c78f2000 ffffffff 7e1b317e
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 00000000 00000000 00000000
(perf:5175) DEBUG: 00000000 000215bf 000215bf 00010adf
(perf:5175) DEBUG: 0000b1ea 0000b1eb 000058f6 000163d5
(perf:5175) DEBUG: 000215bf 00000857 00000000 000215bf
(perf:5175) DEBUG: 00000000 000215bf 000215bf 000215b1
(perf:5175) DEBUG: read report: reason = c0ee806, timestamp = c78f2000, exponent mask=3fff
(perf:5175) DEBUG: ref count after closing i915 perf stream fd = 2
(perf:5175) CRITICAL: Test assertion failure function test_i915_ref_count, file ../tests/i915/perf.c:4870:
(perf:5175) CRITICAL: Failed assertion: ref_count0 == baseline
(perf:5175) CRITICAL: error: 2 != 1
(perf:5175) igt_core-INFO: Stack trace:
(perf:5175) igt_core-INFO:   #0 ../lib/igt_core.c:1726 __igt_fail_assert()
(perf:5175) igt_core-INFO:   #1 ../tests/i915/perf.c:4859 test_i915_ref_count()
(perf:5175) igt_core-INFO:   #2 [main+0x30]
****  END  ****
Subtest i915-ref-count: FAIL (0.295s)
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igt@perf@i915-ref-count - fail - Failed assertion: ref_count0 == baseline, error: 2 != 1
