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2026-04-20 - 12:15
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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 Mon Apr 20, 2026 00:45:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
296869911281,19cyclictest14-21ksoftirqd/023:20:260
296869910979,18cyclictest14-21ksoftirqd/023:05:150
296919910613,72cyclictest0-21swapper/123:35:131
296869910677,19cyclictest14-21ksoftirqd/022:00:240
296869910576,18cyclictest14-21ksoftirqd/019:30:120
296919910417,67cyclictest0-21swapper/120:55:141
296919910416,68cyclictest0-21swapper/121:25:151
296919910353,30cyclictest26-21ksoftirqd/121:45:141
296919910312,71cyclictest0-21swapper/123:25:121
296919910213,71cyclictest0-21swapper/121:55:141
296919910213,67cyclictest0-21swapper/123:45:151
296919910014,67cyclictest0-21swapper/121:50:141
296919910011,22cyclictest0-21swapper/120:50:151
29691999912,22cyclictest0-21swapper/123:55:141
29691999911,22cyclictest0-21swapper/122:15:141
29691999845,29cyclictest26-21ksoftirqd/122:35:131
29691999813,64cyclictest0-21swapper/120:25:251
29691999812,23cyclictest0-21swapper/122:10:221
29691999812,23cyclictest0-21swapper/122:10:221
29691999812,21cyclictest0-21swapper/122:30:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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