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2025-11-23 - 12:23
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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 rack3slot6.osadl.org (updated Sun Nov 23, 2025 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3468999910,69cyclictest0-21swapper/000:05:130
205729924,18sleep10-21swapper/119:05:181
124332970,16sleep0171rcuc/022:35:280
3468999223,37cyclictest18067-21/usr/sbin/munin19:50:330
32002920,6chrt3199-21/usr/sbin/munin23:40:361
3468998826,38cyclictest1673-21runrttasks23:35:370
3472998726,23cyclictest448-21dbus-daemon00:20:011
347299867,23cyclictest14600-21apt-get19:40:151
347299857,18cyclictest29518-21apt-get23:25:151
3472998528,16cyclictest20201-21seq00:30:071
346899859,59cyclictest0-21swapper/023:00:130
327928518,55sleep00-21swapper/019:09:290
347299848,18cyclictest8728-21apt-get20:55:161
347299847,23cyclictest16741-21apt-get00:20:161
347299838,21cyclictest5251-21apt-get20:45:171
347299827,19cyclictest558-21apt-get23:35:131
347299827,18cyclictest3513-21apt-get20:40:171
347299826,18cyclictest19560-21apt-get21:25:151
3472998226,20cyclictest448-21dbus-daemon22:55:001
3468998229,24cyclictest504-21snmpd19:45:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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