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2026-05-20 - 20:46
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Wed May 20, 2026 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30628321700,3sleep30-21swapper/309:55:053
41206621570,2sleep1412002-21apt-get11:05:011
1051902970,2sleep00-21swapper/007:25:040
5344132810,2sleep1534395-21munin-run12:25:021
4806352740,1sleep0480633-21ssh11:49:330
88350993220,7cyclictest98174-21latency_hist07:20:010
88350993024,5cyclictest489033-21cstates11:55:030
88350992616,6cyclictest88349-21cyclictest11:25:080
3619922260,2sleep30-21swapper/310:30:073
88353992421,1cyclictest0-21swapper/208:00:002
88351992421,2cyclictest274795-21aten2.4-expect09:35:011
88350992421,2cyclictest267051-21grep09:30:010
88350992415,8cyclictest0-21swapper/012:10:010
88353992320,1cyclictest0-21swapper/208:30:022
88351992320,2cyclictest366932-21fschecks_time10:35:011
88350992320,2cyclictest148722-21apt-config08:00:000
88350992313,9cyclictest0-21swapper/007:50:010
8835099231,1cyclictest419579-21apt-get11:10:000
88351992219,2cyclictest450375-21latency_hist11:30:021
88351992219,2cyclictest174019-21aten2.4-expect08:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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