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2025-12-05 - 00:53
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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 50 highest latencies:
System rack9slot2.osadl.org (updated Thu Dec 04, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
202532316199,101sleep20-21swapper/22
202922280242,26sleep00-21swapper/00
203582252184,17sleep10-21swapper/11
202342240170,22sleep30-21swapper/33
2071699201197,2cyclictest0-21swapper/11
2072299194191,2cyclictest0-21swapper/22
2071099184179,3cyclictest12567-21strings0
2600621480,3sleep02071099cyclictest0
736121290,3sleep20-21swapper/22
2072699121117,2cyclictest0-21swapper/33
320912480,3sleep00-21swapper/00
230822430,2sleep30-21swapper/33
2071099431,15cyclictest0-21swapper/00
2071099429,18cyclictest8441-21expr0
2071099420,22cyclictest14901-21date0
2072299412,36cyclictest17486-21grep2
2072299412,36cyclictest17486-21grep2
2072299400,36cyclictest16368-21sleep2
2071099400,20cyclictest28616-21cat0
2072299391,35cyclictest2187-21cron2
2072299371,34cyclictest12026-21cat2
2071099378,16cyclictest2082-21systemd-journal0
2071099371,21cyclictest31226-21ntpq0
2071099370,21cyclictest24826-21grep0
2072299361,3cyclictest26052-21perf2
2071099360,24cyclictest24491-21memory0
2071099360,21cyclictest12715-21awk0
2071099360,20cyclictest24050-21ntpq0
20722993513,4cyclictest31360-21expr2
2072299350,3cyclictest15728-21cat2
2071099351,18cyclictest8442-21/usr/sbin/munin0
2071099351,16cyclictest7400-21latency_hist0
20722993415,17cyclictest0-21swapper/22
2072299341,3cyclictest26061-1kworker/2:2H2
2071099340,19cyclictest4344-21cat0
2071099340,18cyclictest19524-21ntp_states0
20722993313,3cyclictest26204-21expr2
2071699334,13cyclictest6837-21tr1
2071099330,18cyclictest26690-21ntpq0
20722993213,2cyclictest20532-21latency_hist2
20722993213,2cyclictest16793-21latency_hist2
20722993210,4cyclictest505-21dbus-daemon2
20710993216,14cyclictest5849-21ls0
2071099320,16cyclictest0-21swapper/00
20722993113,3cyclictest28307-21/usr/sbin/munin2
2072299311,13cyclictest14756-21latency_hist2
2072299310,1cyclictest0-21swapper/22
2072299310,1cyclictest0-21swapper/22
20716993111,4cyclictest10333-21gdbus1
20710993115,13cyclictest25674-21cut0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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