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2025-06-28 - 23:01
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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 Sat Jun 28, 2025 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
318083199110102,6cyclictest3184173-21gpgv07:20:010
3180832999871,24cyclictest3257005-21apt-get11:05:001
3180832999485,7cyclictest3105085-21systemd-journal09:40:011
3180831999489,3cyclictest3270217-21kworker/u8:0+flush-179:012:25:000
3180831999383,7cyclictest3202097-21latency_hist08:15:010
3180831999083,5cyclictest3247164-21kworker/u8:1+flush-179:010:40:000
3180832998984,4cyclictest3240842-21kworker/u8:2+events_unbound10:35:241
3180831998874,11cyclictest3212170-21apt-get08:45:140
3180831998676,7cyclictest1-21systemd08:30:000
3180832998580,4cyclictest3255642-21kworker/u8:0+events_unbound11:20:291
3180831998474,7cyclictest3255642-21kworker/u8:0+flush-179:011:25:200
3180831998471,10cyclictest3203962-21apt-get08:20:150
3180832998378,4cyclictest3187950-21kworker/u8:1+events_unbound07:40:031
3180832998375,3cyclictest3247164-21kworker/u8:1+events_unbound10:40:251
3180832998276,4cyclictest3227801-21kworker/u8:3+events_unbound09:35:181
3180832998274,3cyclictest3229478-21kworker/u8:1+events_unbound10:00:221
3180831998271,8cyclictest3227820-21latency_hist09:35:010
3180831998271,7cyclictest3247164-21kworker/u8:1+flush-179:010:40:250
3180832998176,4cyclictest3194181-21kworker/u8:0+events_unbound08:30:251
3180832998172,4cyclictest3257030-21kworker/u8:3+events_unbound11:30:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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