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2025-11-07 - 05:39
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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 rackeslot5.osadl.org (updated Fri Nov 07, 2025 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
779599310,30cyclictest22270-21cron20:50:000
779799300,29cyclictest609-21dbus-daemon20:05:012
7795993028,1cyclictest626-21gdbus19:25:010
779899290,28cyclictest26916-21apt-get23:15:143
779799290,28cyclictest25502-21munin-run22:05:012
779799290,28cyclictest0-21swapper/220:40:152
779799290,28cyclictest0-21swapper/200:20:152
7796992927,1cyclictest0-21swapper/121:10:001
779699290,1cyclictest18005-21cron00:05:011
7795992928,1cyclictest5633-21cron20:15:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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