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2026-03-26 - 10:32
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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 Thu Mar 26, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3108467996118,39cyclictest0-21swapper/323:38:383
310846799590,57cyclictest3157896-21/usr/sbin/munin20:40:123
3108467995818,39cyclictest511ktimers/319:20:213
3108467995817,39cyclictest3155155-21/usr/sbin/munin20:35:163
3108467995738,19cyclictest3213964-21ntp_states22:20:173
3108467995737,19cyclictest413-21systemd-journal21:55:013
3108467995637,19cyclictest511ktimers/323:26:353
3108467995636,19cyclictest3267814-21/usr/sbin/munin00:00:193
3108467995618,19cyclictest3147499-21diskstats20:20:133
3108467995618,19cyclictest3108551-21munin-run19:10:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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