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2026-08-05 - 13:32
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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 Wed Aug 05, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
335557499177175,1cyclictest3446516-21apt21:55:123
3355571991120,1cyclictest0-21swapper/022:40:170
3355575998628,39cyclictest1-21systemd22:00:014
3355575998321,39cyclictest3436480-21/usr/sbin/munin21:35:194
335557599824,18cyclictest352654150/usr/sbin/munin00:20:214
335557599823,60cyclictest3508763-21sendmail_mailst23:45:244
3355575998078,1cyclictest3401099-21ntpq20:30:214
3355575997636,39cyclictest872-21mta-sts-daemon19:57:434
3355575997434,39cyclictest6050ktimers/423:28:114
3355575997373,0cyclictest236199-21snmpd00:28:574
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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