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2026-04-02 - 13:41
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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 Thu Apr 02, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15318999211,17cyclictest0-21swapper/023:40:130
1531899898,36cyclictest723-21taskset21:30:140
15318998917,64cyclictest0-21swapper/019:30:130
15330998643,28cyclictest26-21ksoftirqd/120:30:121
284612850,4sleep036-21kcompactd000:15:310
15318998534,18cyclictest0-21swapper/020:50:110
15318998357,13cyclictest0-21swapper/020:25:120
1357728240,25sleep10-21swapper/119:05:151
15330998140,28cyclictest26-21ksoftirqd/121:00:141
15318998063,9cyclictest14-21ksoftirqd/000:05:100
1533099796,67cyclictest0-21swapper/100:10:191
1533099796,32cyclictest0-21swapper/120:45:121
1533099795,21cyclictest717-21apt-get21:30:151
15318997860,10cyclictest14-21ksoftirqd/023:50:150
1499327815,53sleep00-21swapper/019:08:340
15318997758,13cyclictest0-21swapper/020:05:130
15330997621,17cyclictest15901-21cut22:10:361
15318997649,17cyclictest0-21swapper/019:15:110
15318997517,51cyclictest0-21swapper/021:40:120
15330997421,18cyclictest6139-21cron21:45:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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