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2026-08-07 - 20:39
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Fri Aug 07, 2026 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41195112830,2sleep20-21swapper/208:40:372
4005087992421,2cyclictest39570-21apt10:15:190
4005087992421,2cyclictest203792-21cron12:30:010
4005089992320,1cyclictest0-21swapper/210:25:012
4005087992319,2cyclictest4178881-21apt09:30:150
4005087992219,2cyclictest688-21in:imuxsock08:15:010
4005089992118,1cyclictest0-21swapper/207:20:002
4005088992118,2cyclictest4005085-21cyclictest10:40:351
4005087992118,2cyclictest688-21in:imuxsock11:15:000
1157598210,5rtkit-daemon351ktimers/111:59:411
4005089992017,1cyclictest0-21swapper/208:10:012
4005088992017,2cyclictest0-21swapper/111:00:011
400508899200,1cyclictest0-21swapper/108:45:181
4005087992017,2cyclictest82192-21/usr/sbin/munin10:50:010
1157598200,4rtkit-daemon1306-21mta-sts-daemon07:40:501
1157598200,3rtkit-daemon1307-21mta-sts-daemon07:43:160
4005088991916,2cyclictest51397-21apt-config10:25:011
4005087991916,2cyclictest664-21dbus-daemon10:15:020
4005087991916,2cyclictest664-21dbus-daemon08:55:020
4005088991815,2cyclictest0-21swapper/108:55:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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