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2026-05-28 - 02:22
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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 Wed May 27, 2026 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
107978021170,3sleep30-21swapper/309:10:043
92830199330,9cyclictest1185895-21ssh10:24:490
13341782310,2sleep30-21swapper/312:00:033
928301992923,5cyclictest1290-21dbus-daemon12:20:000
928301992814,9cyclictest0-21swapper/011:40:030
928301992718,8cyclictest1208265-21apt-get10:39:480
928302992623,2cyclictest1303669-21/usr/sbin/munin11:40:021
928301992620,5cyclictest1169222-21systemd-run10:10:020
928301992620,5cyclictest1108931-21grep09:30:000
928301992520,4cyclictest1251609-21unixbench-2d11:05:010
928301992519,5cyclictest1288493-21sendmail_mailtr11:30:000
928301992516,7cyclictest3851704-21mta-sts-daemon08:55:020
9833782240,2sleep1983363-21ps07:54:591
928302992416,3cyclictest1291198-21cstates11:34:511
928301992418,5cyclictest3824567-21rs:main0
928301992418,5cyclictest0-21swapper/007:55:020
928301992412,8cyclictest0-21swapper/012:30:010
92830199238,10cyclictest0-21swapper/010:44:490
928301992318,4cyclictest1364007-21sensors_temp12:20:030
928301992317,5cyclictest954713-21grep07:30:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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