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2026-01-04 - 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 20 highest latencies:
System rack3slot6.osadl.org (updated Sun Jan 04, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
321179911989,17cyclictest14-21ksoftirqd/019:35:160
321179911587,19cyclictest14-21ksoftirqd/021:15:160
321179911283,20cyclictest14-21ksoftirqd/020:20:130
321179911183,18cyclictest14-21ksoftirqd/023:50:160
321179910879,19cyclictest14-21ksoftirqd/023:55:130
321229910662,32cyclictest26-21ksoftirqd/100:30:141
321179910613,77cyclictest0-21swapper/000:35:130
321179910410,80cyclictest0-21swapper/021:20:140
321179910371,21cyclictest14-21ksoftirqd/000:25:140
321179910371,20cyclictest14-21ksoftirqd/023:10:130
321179910266,21cyclictest14-21ksoftirqd/023:00:140
321179910160,29cyclictest14-21ksoftirqd/000:15:150
32117999815,71cyclictest0-21swapper/019:25:160
32117999814,35cyclictest0-21swapper/020:55:130
32117999764,20cyclictest14-21ksoftirqd/019:30:140
32117999712,31cyclictest0-21swapper/000:05:120
32117999567,18cyclictest14-21ksoftirqd/021:35:160
32117999563,21cyclictest14-21ksoftirqd/022:15:140
32117999562,21cyclictest14-21ksoftirqd/023:25:240
32117999555,26cyclictest14-21ksoftirqd/019:15:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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