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2026-07-31 - 09:01
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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
Characteristics of the 10 highest latencies:
System rackdslot1.osadl.org (updated Fri Jul 31, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210621810,5sleep10-21swapper/119:05:121
1780521390,2sleep1437299cyclictest00:15:191
137872800,24sleep233-21ksoftirqd/221:50:132
4374996711,53cyclictest27940-21chrt00:35:503
437499668,11cyclictest28001-21df_abs20:00:143
437499668,11cyclictest27992-21apt-config23:30:003
4374996412,49cyclictest11214-21chrt21:44:493
437499637,11cyclictest20917-21cpuspeed_turbos20:55:143
437499637,11cyclictest2088-21latency_hist20:15:003
4374996311,15cyclictest3307-21iostat_ios23:45:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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