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2026-08-03 - 21:56
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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 Mon Aug 03, 2026 12:45:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2291229916,33sleep10-21swapper/107:08:351
2220828422,16sleep00-21swapper/007:05:250
296402820,6sleep129641-21wc07:25:271
23227997737,25cyclictest14-21ksoftirqd/009:05:000
23227997642,15cyclictest14-21ksoftirqd/007:15:180
23231997542,25cyclictest26-21ksoftirqd/110:40:131
23227997530,11cyclictest14-21ksoftirqd/009:35:220
23227997530,11cyclictest14-21ksoftirqd/009:35:220
23227997427,11cyclictest14-21ksoftirqd/010:45:000
23231997334,35cyclictest0-21swapper/112:35:141
23227997248,10cyclictest14-21ksoftirqd/007:31:000
23227997239,12cyclictest18426-21/usr/sbin/munin08:25:280
2322799723,41cyclictest16854-21ntp_states09:50:300
23231997027,38cyclictest0-21swapper/110:35:151
23227997037,27cyclictest14-21ksoftirqd/010:18:070
23231996924,9cyclictest26-21ksoftirqd/108:20:131
23227996930,33cyclictest14-21ksoftirqd/007:25:200
23227996922,18cyclictest8671-21sendmail11:00:010
23231996840,17cyclictest0-21swapper/111:20:111
23231996823,9cyclictest26-21ksoftirqd/107:50:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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