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2026-07-31 - 04:06
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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 Fri Jul 31, 2026 00:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
137449910711,84cyclictest0-21swapper/019:35:120
137449910628,69cyclictest13736-21cyclictest23:55:120
137449910611,83cyclictest0-21swapper/021:05:100
137449910510,81cyclictest0-21swapper/023:35:130
137449910213,78cyclictest0-21swapper/021:30:120
137449910159,29cyclictest14-21ksoftirqd/022:40:120
137449910070,19cyclictest14-21ksoftirqd/020:50:110
137449910013,75cyclictest0-21swapper/020:30:110
13744999946,38cyclictest14-21ksoftirqd/021:35:130
13748999811,75cyclictest0-21swapper/100:10:171
13744999850,37cyclictest14-21ksoftirqd/022:15:120
13748999711,73cyclictest0-21swapper/122:10:141
13748999710,76cyclictest0-21swapper/123:25:161
13748999613,71cyclictest0-21swapper/119:55:141
13744999651,34cyclictest14-21ksoftirqd/000:20:160
13744999647,38cyclictest14-21ksoftirqd/000:05:150
13748999554,31cyclictest26-21ksoftirqd/123:45:121
13748999554,31cyclictest26-21ksoftirqd/123:45:121
13748999512,70cyclictest0-21swapper/122:30:221
13748999415,69cyclictest0-21swapper/120:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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