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2026-05-19 - 19:17
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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 rackeslot5.osadl.org (updated Tue May 19, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2633299334,1cyclictest621-21dbus-daemon10:50:023
26323993028,1cyclictest19251-21sendmail-msp10:20:011
2632399300,29cyclictest14928-21cron07:55:011
26332992928,1cyclictest0-21swapper/309:30:123
2633299290,28cyclictest0-21swapper/309:15:123
2632799290,28cyclictest26318-21munin-run10:35:012
2632799290,1cyclictest621-21dbus-daemon07:50:002
2632799290,1cyclictest0-21swapper/211:30:022
2632799290,1cyclictest0-21swapper/209:50:002
26323992926,2cyclictest15212-21apt-get07:55:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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