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2026-06-08 - 00:17
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6.osadl.org (updated Sun Jun 07, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
198709699117109,5cyclictest2006381-21latency_hist08:10:000
198709699115104,8cyclictest2011145-21kworker/u8:1+flush-179:008:30:220
19870999910896,9cyclictest2094720-21latency_hist12:40:011
19870999910799,6cyclictest2080091-21kworker/u8:3+flush-179:012:20:241
19870969910792,11cyclictest1213033-21systemd-journal09:15:000
19870999910393,6cyclictest2024165-21latency_hist09:05:011
19870969910293,7cyclictest2027734-21kworker/u8:2+events_unbound09:20:000
19870969910290,9cyclictest2011166-21latency_hist08:25:020
19870969910290,9cyclictest2011166-21latency_hist08:25:010
19870969910091,7cyclictest2031080-21kworker/u8:1+flush-179:009:30:010
1987096999988,8cyclictest1996585-21latency_hist07:40:020
1987099999888,7cyclictest1213033-21systemd-journal07:55:001
1987099999887,7cyclictest2061322-21apt-get11:00:001
1987096999785,9cyclictest1990231-21kworker/u8:2+flush-179:007:20:230
1987099999687,6cyclictest2086479-21latency_hist12:15:001
1987099999686,7cyclictest2016194-21latency_hist08:40:011
1987099999678,16cyclictest2045397-21kworker/u8:3+flush-179:010:34:591
1987096999689,4cyclictest2058355-21kworker/u8:1+events_unbound11:15:010
1987099999488,4cyclictest2046967-21latency_hist10:15:011
1987096999284,5cyclictest2006426-21kworker/u8:3+flush-179:008:25:230
1987096999284,5cyclictest2006426-21kworker/u8:3+flush-179:008:25:230
1987096999183,6cyclictest2006637-21apt-get08:10:110
1987099998878,8cyclictest2073202-21kworker/u8:1+events_unbound12:30:001
1987096998883,4cyclictest2073202-21kworker/u8:1+flush-179:012:10:250
1987096998678,5cyclictest2080091-21kworker/u8:3+events_unbound12:05:170
1987099998579,4cyclictest1213033-21systemd-journal11:35:011
1987099998575,7cyclictest2058355-21kworker/u8:1+flush-179:010:50:241
1987099998575,7cyclictest2058355-21kworker/u8:1+flush-179:010:50:241
1987096998576,6cyclictest1984183-21kworker/u8:0+flush-179:007:15:250
1987096998479,3cyclictest2032876-21kworker/u8:0+flush-179:009:40:150
1987096998476,5cyclictest2053321-21kworker/u8:0+flush-179:011:25:150
1987096998474,7cyclictest1998168-21latency_hist07:45:000
1987099998272,7cyclictest1972663-21kworker/u8:1+flush-179:007:10:261
1987096998175,4cyclictest2024139-21kworker/u8:0+flush-179:009:05:160
1987096998167,11cyclictest2073234-21apt-get11:35:010
1987096998076,3cyclictest2080091-21kworker/u8:3+flush-179:012:25:230
1987096998074,4cyclictest2069519-21kworker/u8:2+flush-179:011:35:240
1987096998074,4cyclictest2009532-21kworker/u8:0+flush-179:008:20:000
1987096998072,5cyclictest2073202-21kworker/u8:1+events_unbound11:50:240
1987096998068,8cyclictest2037400-21kworker/u8:2+flush-179:009:55:200
1987099997970,6cyclictest1999753-21latency_hist07:50:021
1987096997972,4cyclictest2019381-21latency_hist08:50:010
1987096997971,6cyclictest2037400-21kworker/u8:2+events_unbound10:39:590
1987096997970,6cyclictest2017766-21kworker/u8:2+events_unbound09:00:000
1987099997869,6cyclictest2048587-21latency_hist10:20:001
1987096997869,6cyclictest2073202-21kworker/u8:1+flush-179:012:15:210
1987096997770,5cyclictest2037400-21kworker/u8:2+flush-179:010:20:200
1987096997769,5cyclictest2058355-21kworker/u8:1+flush-179:010:50:210
1987096997769,5cyclictest2058355-21kworker/u8:1+flush-179:010:50:210
1987096997661,6cyclictest2088126-21kworker/u8:2+events_unbound12:30:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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