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2025-12-02 - 13:59
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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 Tue Dec 02, 2025 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2512737997334,19cyclictest2649454-21/usr/sbin/munin23:10:234
2512737997234,19cyclictest591rcuc/400:25:154
2512737997233,39cyclictest0-21swapper/422:51:534
2512737997133,19cyclictest2539262-21grep19:55:174
2512737997113,39cyclictest2548067-21sed20:10:194
2512739997032,38cyclictest0-21swapper/620:05:216
251273799697,60cyclictest2674574-21taskset23:52:014
2512737996951,18cyclictest601ktimers/419:44:574
251273799678,59cyclictest2683698-21kworker/u32:4+events_unbound00:14:354
2512737996729,38cyclictest0-21swapper/400:35:584
2512737996528,19cyclictest601ktimers/421:45:154
2512733996529,18cyclictest171ktimers/022:50:160
2512737996424,40cyclictest0-21swapper/419:15:054
2512737996423,39cyclictest6050ktimers/400:03:494
251273799635,39cyclictest110280-21munin-node22:10:114
2512737996345,18cyclictest0-21swapper/423:45:164
2512737996222,20cyclictest2583217-21taskset21:13:134
2512737996122,19cyclictest0-21swapper/400:32:284
2512737995921,0cyclictest144798rtkit-daemon22:29:534
251273799580,39cyclictest2631134-21ntpq22:35:234
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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