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2026-04-20 - 03:22
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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 rackbslot7.osadl.org (updated Mon Apr 20, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24987213511,89sleep225077-21grep18:58:372
256219910864,37cyclictest27393-21ssh00:32:481
256179910842,27cyclictest25626-21latency_hist19:02:540
256179910755,43cyclictest12358-21ssh21:23:020
256219910443,9cyclictest0-21swapper/123:23:231
256219910438,12cyclictest0-21swapper/120:28:161
256219910438,12cyclictest0-21swapper/120:28:161
256179910445,22cyclictest20357-21sh00:19:260
256179910342,24cyclictest21722-21tune2fs20:28:130
256179910342,24cyclictest21722-21tune2fs20:28:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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