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2026-05-19 - 13:48
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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 Tue May 19, 2026 12:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3245521120,6chrt32457-21cut07:55:270
150439911078,19cyclictest14-21ksoftirqd/012:25:120
150439910877,19cyclictest14-21ksoftirqd/011:25:120
150509910767,28cyclictest26-21ksoftirqd/111:05:141
150509910670,25cyclictest26-21ksoftirqd/112:30:131
150509910458,34cyclictest26-21ksoftirqd/111:15:151
150509910323,31cyclictest0-21swapper/108:50:121
150509910045,41cyclictest26-21ksoftirqd/109:20:111
15050999913,68cyclictest0-21swapper/110:15:141
15050999912,68cyclictest0-21swapper/110:30:101
15043999970,19cyclictest14-21ksoftirqd/011:55:170
15050999630,48cyclictest0-21swapper/110:10:121
15050999617,67cyclictest0-21swapper/108:35:151
15050999614,62cyclictest0-21swapper/110:55:141
15050999513,62cyclictest0-21swapper/109:55:141
15050999512,64cyclictest0-21swapper/107:25:161
15050999512,60cyclictest0-21swapper/109:15:121
15050999511,65cyclictest0-21swapper/112:05:131
15050999511,64cyclictest0-21swapper/111:00:141
15050999511,62cyclictest0-21swapper/109:30:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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