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2025-09-18 - 10:07
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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 rack0slot5.osadl.org (updated Thu Sep 18, 2025 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3851237995276,520cyclictest142-21ksoftirqd/1321:10:505
3851237995276,520cyclictest142-21ksoftirqd/1321:10:505
38512059952722,29cyclictest0-21swapper/621:23:5012
38512059952114,44cyclictest0-21swapper/619:47:5012
385123399519518,1cyclictest0-21swapper/1221:25:504
385120599509507,2cyclictest3888950-21kworker/6:1+i915-unordered19:53:5012
38512059950824,0cyclictest0-21swapper/619:28:5012
385120199505504,0cyclictest3951411-21kworker/5:0+i915-unordered21:10:5011
385120199505504,0cyclictest3951411-21kworker/5:0+i915-unordered21:10:5011
385119799504502,2cyclictest3956906-21kworker/4:2+i915-unordered21:25:5010
385119799503502,1cyclictest0-21swapper/419:47:5010
385119799491491,0cyclictest0-21swapper/423:12:5010
38512059948522,462cyclictest0-21swapper/622:43:5012
385121299482482,0cyclictest3913576-21kworker/8:1+i915-unordered20:22:5014
385123999472470,1cyclictest77250irq/159-i91522:14:506
38512059947020,448cyclictest0-21swapper/620:05:1112
385123999469468,1cyclictest77250irq/159-i91521:00:506
385122299469468,1cyclictest0-21swapper/1021:00:502
385121699466460,5cyclictest1811-21snmpd22:20:4815
38512109946523,29cyclictest0-21swapper/723:29:5013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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