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2025-11-20 - 05:14
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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 rack3slot6.osadl.org (updated Thu Nov 20, 2025 00:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24403991018,21cyclictest0-21swapper/119:50:081
24124210030,25sleep10-21swapper/119:09:001
2440399979,23cyclictest0-21swapper/123:55:131
2440399979,23cyclictest0-21swapper/123:55:121
234252927,67sleep023505-21/usr/sbin/munin19:05:290
24396999164,18cyclictest14-21ksoftirqd/020:35:260
24396999160,20cyclictest14-21ksoftirqd/022:50:120
24403998910,19cyclictest0-21swapper/122:40:161
24396998961,18cyclictest14-21ksoftirqd/020:10:160
24396998861,17cyclictest14-21ksoftirqd/023:50:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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