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2026-05-15 - 12:40
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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 10 highest latencies:
System rack3slot6.osadl.org (updated Fri May 15, 2026 00:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
553321430,5chrt5532-21/usr/sbin/munin23:00:250
3156921180,6sleep031573-21kernelversion21:10:270
19796210024,28sleep00-21swapper/019:07:200
222522990,6chrt141ksoftirqd/019:15:050
20243999925,22cyclictest24623-21kworker/1:219:40:151
20238998028,35cyclictest503-21snmpd21:45:390
2023899793,48cyclictest21145-21users22:10:370
20243997849,22cyclictest26-21ksoftirqd/122:55:121
20243997748,19cyclictest26-21ksoftirqd/100:35:151
20238997734,9cyclictest14-21ksoftirqd/022:45:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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