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2026-03-11 - 15:39
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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 rackfslot7.osadl.org (updated Wed Mar 11, 2026 12:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40770879911012,0cyclictest0-21swapper/108:55:151
4077095998850,19cyclictest586842sleep512:27:355
407709599800,59cyclictest5810-21open_files10:50:195
4077095997658,18cyclictest691ktimers/507:33:435
4077095997373,0cyclictest7717-21df_inode10:55:155
4077091997130,40cyclictest870-21mta-sts-daemon07:34:173
4077095997032,38cyclictest0-21swapper/511:01:455
4077091997051,19cyclictest0-21swapper/312:10:153
4077095996930,39cyclictest0-21swapper/511:27:275
4077095996929,39cyclictest0-21swapper/509:36:135
4077095996929,39cyclictest0-21swapper/509:22:075
407709599689,20cyclictest4192901-21apt-get10:40:115
4077095996847,20cyclictest236199-21snmpd10:39:535
4077095996728,39cyclictest0-21swapper/512:21:595
4077095996628,19cyclictest4126412-21taskset08:36:475
407709599657,39cyclictest4104123-21chrt07:56:435
407710099602,19cyclictest0-21swapper/711:45:157
407709599590,59cyclictest20196-21chrt11:17:195
407709599590,40cyclictest4170093-21chrt09:57:035
4077091995818,19cyclictest191rcu_preempt11:35:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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