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2026-07-18 - 07:33
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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 Sat Jul 18, 2026 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
128172990,6chrt12345-21apt-get20:25:150
18048999577,11cyclictest14-21ksoftirqd/020:40:150
18048999262,16cyclictest0-21swapper/023:10:140
1755729029,48sleep10-21swapper/119:06:391
1755729029,48sleep10-21swapper/119:06:391
18048998713,67cyclictest0-21swapper/020:20:120
18048998568,11cyclictest14-21ksoftirqd/000:25:110
18048998568,11cyclictest14-21ksoftirqd/000:25:110
18048998566,11cyclictest14-21ksoftirqd/022:55:150
18048998256,13cyclictest0-21swapper/021:45:120
18048998164,10cyclictest14-21ksoftirqd/022:00:250
1789028121,51sleep00-21swapper/019:09:420
1789028121,51sleep00-21swapper/019:09:420
18048997854,12cyclictest14-21ksoftirqd/021:55:150
18048997850,17cyclictest14-21ksoftirqd/021:40:120
18048997752,11cyclictest14-21ksoftirqd/023:50:240
18048997650,13cyclictest14-21ksoftirqd/020:55:150
18048997650,12cyclictest14-21ksoftirqd/021:50:160
18048997647,18cyclictest0-21swapper/023:35:120
286972750,4sleep10-21swapper/122:40:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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