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2026-04-10 - 02:14
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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 rack5slot3.osadl.org (updated Fri Apr 10, 2026 00:54:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
108899981551,761cyclictest11320-21/usr/sbin/munin23:45:146
108839978159,465cyclictest0-21swapper/022:24:160
108899970222,677cyclictest0-21swapper/600:37:316
108879968812,298cyclictest0-21swapper/423:26:074
108839966632,84cyclictest0-21swapper/023:31:560
108879966065,380cyclictest0-21swapper/400:42:394
108899965016,86cyclictest0-21swapper/600:26:136
108869964851,381cyclictest0-21swapper/323:07:153
108849964811,634cyclictest0-21swapper/122:51:381
108839964548,381cyclictest0-21swapper/022:41:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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