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2026-07-18 - 17:04
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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 rack8slot4.osadl.org (updated Sat Jul 18, 2026 12:44:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40363092237178,19sleep50-21swapper/507:07:585
40361852233172,19sleep00-21swapper/007:06:080
40363372230166,19sleep40-21swapper/407:08:214
40364222225167,19sleep60-21swapper/607:09:366
40363522225166,48sleep10-21swapper/107:08:341
40361762225166,19sleep20-21swapper/207:06:022
40364282209180,19sleep30-21swapper/307:09:413
40362012208179,19sleep70-21swapper/707:06:237
403741399370,36cyclictest0-21swapper/212:29:572
403740999330,31cyclictest4110283-21cron09:20:011
403742599320,31cyclictest4190100-21apt-get11:44:587
4037423993228,3cyclictest856-21dbus-daemon12:35:016
403741399320,31cyclictest4136079-21ps10:05:022
4037409993227,4cyclictest4041334-21smartctl07:15:021
403740999320,31cyclictest4082155-21munin-run08:30:011
403740999320,31cyclictest1-21systemd08:50:011
4037407993228,3cyclictest4099323-21ls09:00:010
4037407993227,4cyclictest4057136-21smartctl07:45:000
403740799320,31cyclictest1-21systemd11:20:010
403740799310,3cyclictest4101903-21true09:05:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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