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2026-03-20 - 02:36
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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 rack3slot6.osadl.org (updated Fri Mar 20, 2026 00:45:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
162239910434,58cyclictest26-21ksoftirqd/120:20:131
162239910434,58cyclictest26-21ksoftirqd/120:20:131
16223999313,17cyclictest0-21swapper/121:40:121
16223999115,64cyclictest0-21swapper/100:10:221
1531829138,36sleep10-21swapper/119:05:281
16223999014,16cyclictest0-21swapper/121:15:111
16223998914,16cyclictest0-21swapper/100:20:121
16223998716,16cyclictest0-21swapper/122:20:121
16223998715,16cyclictest0-21swapper/122:55:111
1621799875,22cyclictest9852-21apt-get23:25:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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