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2026-01-05 - 14:22
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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 Mon Jan 05, 2026 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3602226991580,157cyclictest0-21swapper/119:58:271
3602225991230,122cyclictest0-21swapper/019:58:260
360222799890,88cyclictest0-21swapper/222:40:142
3602229998483,0cyclictest3767543-21/usr/sbin/munin00:00:204
360222999833,40cyclictest3643390-21head20:20:174
3602229997737,18cyclictest6050ktimers/419:10:214
3602229997519,19cyclictest0-21swapper/423:08:534
3602229997517,39cyclictest3674957-21tune2fs21:15:144
3602229997414,59cyclictest0-21swapper/423:49:334
3602229997333,19cyclictest0-21swapper/422:05:574
3602229997233,20cyclictest0-21swapper/422:47:534
3602229997131,19cyclictest6050ktimers/421:33:214
3602229996930,39cyclictest6050ktimers/419:50:014
3602229996929,19cyclictest0-21swapper/422:31:174
3602229996929,19cyclictest0-21swapper/419:15:494
3602229996828,19cyclictest0-21swapper/423:25:124
3602229996827,39cyclictest0-21swapper/420:54:444
360222999679,39cyclictest3729550-21ld22:50:194
360222999679,39cyclictest3712765-21ntpq22:20:214
3602229996728,39cyclictest0-21swapper/400:24:114
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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