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2026-09-11 - 14:11
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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 10 highest latencies:
System rackdslot1.osadl.org (updated Fri Sep 11, 2026 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1505321720,3sleep0346499cyclictest00:10:280
217921540,3sleep20-21swapper/221:25:172
134491620,4ptp4l0-21swapper/023:45:160
134491620,4ptp4l0-21swapper/023:45:160
134491610,3ptp4l25326-21/usr/sbin/munin22:15:140
134491600,4ptp4l32128-21df22:30:131
134491600,4ptp4l32093-21apt-get23:40:122
3467995926,3cyclictest41-21ksoftirqd/322:18:203
134491590,26ptp4l41-21ksoftirqd/300:20:243
3467995831,4cyclictest41-21ksoftirqd/323:34:103
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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