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2025-12-15 - 00:14
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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 Sun Dec 14, 2025 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2365100997417,38cyclictest52-21ksoftirqd/312:35:173
2365104996727,39cyclictest0-21swapper/708:51:507
236510499613,39cyclictest2418560-21taskset08:40:537
236510499613,39cyclictest1086-21runrttasks07:20:247
236510499601,40cyclictest2429205-21cat09:00:187
2365101996013,23cyclictest2528761-21sed11:55:224
236510499590,59cyclictest0-21swapper/712:19:587
236510499590,59cyclictest0-21swapper/711:10:387
236510499590,58cyclictest0-21swapper/710:27:067
2365104995820,19cyclictest2410887-21/usr/sbin/munin08:30:127
2365104995819,38cyclictest841irq_work/712:37:587
2365104995818,39cyclictest0-21swapper/710:21:027
2365104995719,19cyclictest101550irq/39-eno2-TxRx-010:49:147
2365104995714,20cyclictest2517328-21cat11:35:227
2365104995638,18cyclictest101550irq/39-eno2-TxRx-009:55:317
2365104995619,18cyclictest877-21mta-sts-daemon10:10:087
2365104995618,38cyclictest101550irq/39-eno2-TxRx-010:33:347
2365102995637,19cyclictest0-21swapper/508:25:185
2365097995638,18cyclictest251irq_work/012:25:150
2365104995518,18cyclictest101550irq/39-eno2-TxRx-008:55:067
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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