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2026-01-07 - 14:30
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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 Wed Jan 07, 2026 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
69079399113102,9cyclictest1-21systemd00:00:010
69079399961,91cyclictest1-21systemd20:25:000
690793999382,9cyclictest724649-21latency_hist20:55:000
690796998475,7cyclictest772167-21/usr/sbin/munin23:20:241
690796998471,10cyclictest784906-40logrotate00:00:011
690793998377,4cyclictest714893-21kworker/u8:0+flush-179:021:20:010
690796998172,7cyclictest714893-21kworker/u8:0+events_unbound22:05:011
690793998071,7cyclictest776928-21/usr/sbin/munin23:35:230
690793997663,10cyclictest745862-21apt-get21:59:590
690796997239,31cyclictest714-21Xorg22:56:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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