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2025-12-18 - 08:52
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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 rack9slot2.osadl.org (updated Thu Dec 18, 2025 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
190002279177,17sleep00-21swapper/00
193582277190,66sleep20-21swapper/22
189632277226,38sleep30-21swapper/33
191682275179,76sleep10-21swapper/11
1998299256251,3cyclictest12867-21perf0
1999199179174,3cyclictest0-21swapper/22
1235521600,4sleep21999199cyclictest2
1998699144139,3cyclictest12873-21awk1
1999499127122,3cyclictest12846-21munin-run3
265752490,1sleep20-21swapper/22
229532490,1sleep30-21swapper/33
19991992912,8cyclictest28-21ksoftirqd/22
250722280,1sleep30-21swapper/33
1999499277,17cyclictest0-21swapper/33
19991992710,4cyclictest28-21ksoftirqd/22
19991992622,2cyclictest271rcuc/22
19991992615,3cyclictest28-21ksoftirqd/22
19991992610,4cyclictest28-21ksoftirqd/22
1999499256,17cyclictest35-21ksoftirqd/33
1999499256,17cyclictest35-21ksoftirqd/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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