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2026-05-19 - 21:38
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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 rack9slot2.osadl.org (updated Tue May 19, 2026 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
235472281217,34sleep10-21swapper/11
235802262183,45sleep20-21swapper/22
2383999251242,6cyclictest28569-21systemctl3
2383999251242,6cyclictest28569-21systemctl3
233632250215,23sleep30-21swapper/33
235152249214,23sleep00-21swapper/00
2383399207200,5cyclictest28554-21sendmail1
2383399207200,5cyclictest28554-21sendmail1
2382899184178,3cyclictest28561-21perf0
2382899184178,3cyclictest28561-21perf0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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