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2026-08-30 - 11:43
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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 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
1738999872,14cyclictest14-21ksoftirqd/019:10:110
1738999865,23cyclictest14-21ksoftirqd/020:30:130
1738999865,23cyclictest14-21ksoftirqd/020:30:130
1738999662,18cyclictest14-21ksoftirqd/022:15:130
1738999459,20cyclictest14-21ksoftirqd/023:45:150
1738999412,66cyclictest0-21swapper/023:50:110
174099939,64cyclictest0-21swapper/100:10:101
173899923,61cyclictest3634-21aten2.4_r3power20:45:170
1738999211,67cyclictest0-21swapper/000:25:120
173899915,57cyclictest0-21swapper/019:25:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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