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2025-07-16 - 14:04
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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 rackeslot5.osadl.org (updated Wed Jul 16, 2025 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23382993113,18cyclictest28005-21kworker/u8:000:38:083
23372993127,4cyclictest0-21swapper/121:05:141
23372993127,4cyclictest0-21swapper/121:05:141
2338299300,29cyclictest30406-21cron00:00:013
2337299300,29cyclictest18249-21cron22:25:001
23369993028,1cyclictest303-21systemd-journal23:00:000
23382992927,1cyclictest7787-21apt-get19:45:143
2338299290,28cyclictest29909-21perf22:50:013
2338299290,28cyclictest0-21swapper/321:00:193
2337799290,28cyclictest16211-21apt-get22:20:132
2337799290,28cyclictest10108-21apt-get19:50:132
2337799290,28cyclictest0-21swapper/221:45:122
2337299290,28cyclictest23183-21apt-get22:35:161
2337299290,28cyclictest0-21swapper/122:15:131
2337299290,1cyclictest0-21swapper/100:10:011
23369992927,1cyclictest303-21systemd-journal22:50:010
2336999290,28cyclictest2429-21apt-get23:00:140
2336999290,1cyclictest0-21swapper/022:00:010
2338299280,27cyclictest758-21apt-get00:05:263
2338299280,27cyclictest13035-21apt-get21:05:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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