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2026-05-07 - 21:21
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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 Thu May 07, 2026 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
237573799867,59cyclictest2505453-21/usr/sbin/munin11:05:131
2375737997718,39cyclictest2381547-21cut07:20:011
2375737997413,59cyclictest2429007-21/usr/sbin/munin08:45:131
2375737997032,38cyclictest0-21swapper/110:46:141
2375737996810,39cyclictest2529769-21munin-run11:50:011
2375750996749,18cyclictest0-21swapper/312:25:163
237573799679,39cyclictest1309867-21sshd10:27:051
2375737996729,19cyclictest2547968-21gcc12:20:191
2375737996546,19cyclictest0-21swapper/109:35:021
237575499644,20cyclictest0-21swapper/708:10:167
2375754996426,38cyclictest0-21swapper/710:45:147
2375737996323,39cyclictest2465146-21kernelversion09:50:191
237573799613,39cyclictest2459432-21irqstats09:40:171
2375737995735,19cyclictest23921522sleep107:38:211
2375737995735,19cyclictest2375727-21cyclictest07:46:291
2375737995638,18cyclictest85750irq/36-eno1-TxRx-212:30:261
2375737995638,18cyclictest85750irq/36-eno1-TxRx-208:50:191
2375737995638,18cyclictest85750irq/36-eno1-TxRx-207:12:551
2375737995638,18cyclictest85750irq/36-eno1-TxRx-207:12:541
2375737995637,19cyclictest85750irq/36-eno1-TxRx-212:14:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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