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2026-05-24 - 04:10
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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 Sun May 24, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2134099129117,9cyclictest74382-21latency_hist21:55:020
2134199121106,11cyclictest1213033-21systemd-journal23:40:001
2134099119108,8cyclictest83448-21cat22:20:020
2134199115103,4cyclictest1210-21kworker/u8:0+events_unbound19:10:231
2134199113103,8cyclictest71210-21latency_hist21:45:011
2134099113108,3cyclictest55250-21kworker/u8:2+flush-179:021:00:230
2134099112100,8cyclictest1-21systemd23:40:000
2134199109104,4cyclictest32752-21kworker/u8:0+flush-179:019:45:261
2134099107101,5cyclictest115603-21kworker/u8:3+events_unbound00:00:170
213419910495,7cyclictest125167-21latency_hist00:30:011
213409910495,7cyclictest115537-40logrotate00:00:000
213409910196,4cyclictest71203-21kworker/u8:2+flush-179:022:00:270
21340999987,6cyclictest71203-21kworker/u8:2+events_unbound21:55:010
21341999885,5cyclictest55250-21kworker/u8:2+events_unbound21:05:241
21341999885,5cyclictest55250-21kworker/u8:2+events_unbound21:05:241
21340999890,6cyclictest101195-21kworker/u8:0+events_unbound23:30:010
21341999791,4cyclictest76203-21kworker/u8:0+events_unbound22:10:231
21341999785,5cyclictest26073-21kworker/u8:2+events_unbound20:30:131
21340999791,4cyclictest61362-21kworker/u8:1+events_unbound21:35:240
21340999790,5cyclictest42240-21kworker/u8:1+events_unbound20:15:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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