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2026-06-18 - 10:25
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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 20 highest latencies:
System rackeslot6.osadl.org (updated Thu Jun 18, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
106180699141122,10cyclictest1213033-21systemd-journal22:35:001
106180599140135,4cyclictest1153768-21kworker/u8:0+events_unbound00:04:020
106180599132123,6cyclictest1129915-21latency_hist22:40:010
106180599124108,12cyclictest1213033-21systemd-journal22:50:000
106180599113107,4cyclictest1152169-21kworker/u8:3+events_unbound00:05:260
106180699112105,5cyclictest1089596-21kworker/u8:0+flush-179:020:40:251
106180699111105,4cyclictest1136247-21kworker/u8:2+flush-179:023:45:151
10618059911198,10cyclictest1213033-21systemd-journal22:10:010
10618059910898,8cyclictest1136247-21kworker/u8:2+flush-179:023:00:230
10618059910898,7cyclictest1092533-21latency_hist20:45:000
106180599106102,3cyclictest1095746-21kworker/u8:3+events_unbound20:55:240
10618059910499,4cyclictest1079524-21kworker/u8:0+events_unbound20:20:240
10618059910491,5cyclictest1136247-21kworker/u8:2+events_unbound23:35:140
10618059910196,4cyclictest1047425-21kworker/u8:0+events_unbound19:15:230
1061806999888,6cyclictest1089596-21kworker/u8:0+flush-179:020:40:001
1061805999891,5cyclictest1110263-21kworker/u8:1+events_unbound22:15:220
1061806999688,6cyclictest1161774-21kworker/u8:0+flush-179:000:20:241
1061805999687,4cyclictest1110263-21kworker/u8:1+events_unbound21:55:250
1061806999482,9cyclictest1102610-21diskstats21:15:141
1061806999386,4cyclictest1072902-21kworker/u8:3+events_unbound20:10:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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