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2026-08-17 - 01:39
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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 rackbslot7.osadl.org (updated Sun Aug 16, 2026 12:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5346212511,81sleep15425-21/usr/sbin/munin07:05:161
67869910535,22cyclictest16647-21grep07:35:311
67829910456,42cyclictest14580-21ssh09:10:180
3167121030,6sleep10-21swapper/109:36:121
6782991024,82cyclictest8831-21apt-get08:55:070
6786999982,11cyclictest287-21dbus-daemon09:09:551
6782999931,20cyclictest18593-21apt-get11:50:110
6782999931,20cyclictest18593-21apt-get11:50:110
6782999768,21cyclictest6848-21latency_hist07:09:580
6791999569,19cyclictest6774-21cyclictest09:20:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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