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2025-06-29 - 00:46
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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 10 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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