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2026-07-14 - 11:16
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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 Tue Jul 14, 2026 00:45:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
713629023,55sleep10-21swapper/119:08:101
699928918,25sleep00-21swapper/019:06:420
7493998810,71cyclictest5524-21taskset23:35:130
7493998411,66cyclictest0-21swapper/000:25:150
749399816,65cyclictest1982-21apt-get21:55:150
749399813,72cyclictest11874-21uname22:20:320
749399813,72cyclictest11874-21uname22:20:320
749399787,62cyclictest20097-21apt-get21:15:160
749399787,60cyclictest26587-21apt-get00:35:130
749399785,36cyclictest17702-21munin-run00:10:010
7493997842,30cyclictest14-21ksoftirqd/000:00:150
7493997831,42cyclictest564-21df21:50:190
7493997812,52cyclictest0-21swapper/023:55:130
7493997812,52cyclictest0-21swapper/019:10:110
7493997811,55cyclictest0-21swapper/022:00:120
7493997811,53cyclictest0-21swapper/023:20:140
749399773,68cyclictest21364-21/usr/sbin/munin00:20:290
7493997724,47cyclictest29615-21cat21:40:330
7493997715,55cyclictest0-21swapper/021:00:140
7493997715,55cyclictest0-21swapper/021:00:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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