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2025-11-27 - 17:16
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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 Thu Nov 27, 2025 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
303440399899,59cyclictest3128536-21/usr/sbin/munin09:55:174
3034403997233,19cyclictest0-21swapper/410:40:134
3034403997215,38cyclictest1089-21snmpd09:14:334
3034403997032,38cyclictest0-21swapper/407:39:464
3034403997031,39cyclictest0-21swapper/411:15:154
3034403997031,19cyclictest0-21swapper/412:16:374
3034403997012,39cyclictest3140203-21aten2.4_rfpower10:15:154
3034403996729,38cyclictest0-21swapper/409:16:374
3034403996729,19cyclictest3054671-21munin-run07:45:014
3034403996526,19cyclictest0-21swapper/408:09:134
303440199656,19cyclictest191rcu_preempt09:40:162
3034403996324,19cyclictest0-21swapper/410:56:334
303440399613,39cyclictest3040052-21/usr/sbin/munin07:20:014
3034403996022,38cyclictest0-21swapper/410:25:154
3034401996022,19cyclictest411rcuc/211:35:192
3034401996022,19cyclictest411rcuc/211:35:192
3034404995919,39cyclictest691ktimers/507:45:155
3034403995820,19cyclictest3167894-21unin-run11:05:014
303440399580,39cyclictest3108883-21kworker/u32:1+events_unbound09:29:274
3034403995718,39cyclictest3177950-21ntpq11:20:234
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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