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2026-03-28 - 19:36
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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 rackeslot8.osadl.org (updated Sat Mar 28, 2026 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138562621160,2sleep0221rcuc/012:00:160
960754993532,1cyclictest0-21swapper/311:40:003
960754993128,1cyclictest0-21swapper/312:40:003
960754993120,8cyclictest1318613-21turbostat11:20:013
12842812260,2sleep10-21swapper/110:55:191
960754992421,1cyclictest0-21swapper/311:40:253
960754992320,1cyclictest0-21swapper/310:20:013
960754992320,1cyclictest0-21swapper/310:10:013
960754992320,1cyclictest0-21swapper/309:10:003
960754992219,1cyclictest0-21swapper/311:50:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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