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2026-04-22 - 03:41
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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 Wed Apr 22, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24704679911516,59cyclictest2513785-21sensors_temp20:25:243
2470467999716,78cyclictest2483160-21cut19:30:193
2470467999232,39cyclictest2551304-21aten2.4_rfpower21:35:123
2470467999134,38cyclictest2523492-21munin-run20:45:003
2470467999050,39cyclictest0-21swapper/300:30:003
2470467997616,59cyclictest2508122-21ntpq20:15:213
2470467997314,20cyclictest2568686-21latency22:05:193
2470467997214,19cyclictest0-21swapper/322:36:123
2470467997032,38cyclictest0-21swapper/300:15:043
2470467996728,19cyclictest2537373-21/usr/sbin/munin21:10:223
247046799656,40cyclictest2561723-21taskset21:54:463
2470467996344,19cyclictest0-21swapper/321:57:273
2470467996323,39cyclictest0-21swapper/320:30:593
2470465996344,19cyclictest0-21swapper/123:05:181
2470466996121,39cyclictest43-21ksoftirqd/221:20:172
2470466996121,39cyclictest43-21ksoftirqd/221:20:162
2470467996021,39cyclictest0-21swapper/319:44:273
247046599601,59cyclictest0-21swapper/122:00:171
2470465995839,19cyclictest34-21ksoftirqd/119:50:161
247046799570,37cyclictest2541328-21ld21:15:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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