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2026-04-07 - 22:43
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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 Tue Apr 07, 2026 12:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3762245998911,59cyclictest3846191-21ntpq09:40:191
3762245997820,39cyclictest3866175-21switchtime10:15:221
376224599770,58cyclictest3919874-21aten2.4-expect11:55:121
3762245997315,39cyclictest3903042-21munin-run11:25:001
3762245997212,59cyclictest0-21swapper/108:58:231
3762249996123,19cyclictest70-21ksoftirqd/507:25:155
3762245996121,39cyclictest331ktimers/108:26:581
3762245995920,38cyclictest3791703-21ntp_states08:00:201
3762245995835,19cyclictest3888876-21uptime10:55:251
3762245995536,19cyclictest3918389-21ps11:50:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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