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2026-08-30 - 12:03
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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 rack3slot6.osadl.org (updated Sun Aug 30, 2026 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17389911077,18cyclictest0-21swapper/023:10:120
17389910575,20cyclictest14-21ksoftirqd/019:50:120
17389910575,19cyclictest14-21ksoftirqd/021:45:130
17389910478,13cyclictest14-21ksoftirqd/021:10:130
250921020,6chrt2508-21/usr/sbin/munin22:10:461
250921020,6chrt2508-21/usr/sbin/munin22:10:461
17389910176,17cyclictest14-21ksoftirqd/019:35:120
17389910176,17cyclictest14-21ksoftirqd/019:35:110
17389910070,20cyclictest14-21ksoftirqd/020:00:110
17389910065,20cyclictest14-21ksoftirqd/020:15:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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