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2025-12-06 - 10:34
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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 rackfslot7.osadl.org (updated Sat Dec 06, 2025 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3444932998648,20cyclictest3504231-21pluginstate20:55:011
3444932998527,39cyclictest3507073-21latency_hist21:00:011
3444932997234,19cyclictest3624824-21/usr/sbin/munin00:25:221
3444932996910,40cyclictest3606658-21latency_hist23:55:011
344493299657,39cyclictest3555781-21kworker/u32:1+events_unbound22:25:321
344493299657,39cyclictest3553618-21/usr/sbin/munin22:20:191
3444932996527,38cyclictest0-21swapper/123:45:131
3444932996527,19cyclictest3618064-21find00:15:111
344493299644,59cyclictest3499513-21cat20:45:131
3444932996426,19cyclictest3462461-21cpuspeed_turbos19:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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