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2026-03-18 - 13:00
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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 rack4slot6.osadl.org (updated Wed Mar 18, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26811521430,129pltrace0-21swapper/619:05:176
26811521170,114pltrace0-21swapper/719:05:137
26811521160,112pltrace0-21swapper/119:05:521
26811521160,108pltrace0-21swapper/219:05:172
26811521140,111pltrace0-21swapper/519:05:155
26811521060,97pltrace0-21swapper/319:05:133
2939627042,10sleep00-21swapper/019:06:260
2941125844,10sleep40-21swapper/419:06:374
193552390,0sleep40-21swapper/421:40:214
193552390,0sleep40-21swapper/421:40:214
925852350,4pltrace0-21swapper/719:30:147
1482952290,3pltrace0-21swapper/719:40:117
1761752260,1pltrace17621-21pltrace-run19:44:005
2989299230,16cyclictest0-21swapper/623:27:466
2988599220,7cyclictest0-21swapper/421:32:554
2988599220,7cyclictest0-21swapper/421:32:554
29888992016,3cyclictest0-21swapper/520:10:225
29872991914,3cyclictest0-21swapper/120:10:251
1143852190,8pltrace78-21ksoftirqd/721:33:247
1143852190,8pltrace78-21ksoftirqd/721:33:247
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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