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2025-12-23 - 09:33
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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 Tue Dec 23, 2025 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13713999913,47cyclictest0-21swapper/022:20:160
115932950,4sleep0171rcuc/022:05:020
13719999151,21cyclictest26-21ksoftirqd/123:25:111
13719999151,21cyclictest26-21ksoftirqd/123:25:111
13719999150,23cyclictest26-21ksoftirqd/122:45:171
13713998860,15cyclictest0-21swapper/022:40:130
13719998749,21cyclictest26-21ksoftirqd/119:20:141
13719998747,22cyclictest26-21ksoftirqd/100:05:131
13713998664,11cyclictest14-21ksoftirqd/023:00:120
13713998561,11cyclictest14-21ksoftirqd/022:25:150
1371999816,11cyclictest0-21swapper/119:35:241
13719998150,18cyclictest26-21ksoftirqd/100:00:151
13713998161,11cyclictest14-21ksoftirqd/022:10:120
13713998151,18cyclictest14-21ksoftirqd/000:05:140
1371999806,36cyclictest0-21swapper/123:40:241
1329928021,50sleep00-21swapper/019:07:290
13713997958,10cyclictest14-21ksoftirqd/019:30:130
13713997749,19cyclictest17552-21apt-get20:50:150
1198427737,24sleep10-21swapper/119:05:161
13713997449,15cyclictest14-21ksoftirqd/020:30:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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