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2025-12-18 - 18:55
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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 rackeslot6.osadl.org (updated Thu Dec 18, 2025 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
228836999572,5cyclictest323591-21latency_hist12:05:011
228836999164,8cyclictest236754-21latency_hist07:35:001
228835997669,5cyclictest276850-21latency_hist09:40:000
228835997565,8cyclictest288477-21/usr/sbin/munin10:15:220
228835997153,15cyclictest273661-21latency_hist09:30:020
4577091690,35ptp4l441ktimers/307:09:143
228835996859,6cyclictest299431-21kworker/u8:0+events_unbound11:10:270
228835996859,6cyclictest299431-21kworker/u8:0+events_unbound11:10:260
228835996763,3cyclictest253649-21kworker/u8:0+flush-179:009:00:260
228835996558,5cyclictest330218-21latency_hist12:25:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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