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2025-12-18 - 21:28
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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 18, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
236412285219,24sleep20-21swapper/22
236842275178,83sleep30-21swapper/33
238922260188,25sleep00-21swapper/00
236522260225,23sleep10-21swapper/11
2413399190185,3cyclictest0-21swapper/00
2413799150144,4cyclictest12053-21strings1
2414699108105,2cyclictest0-21swapper/33
128902550,1sleep10-21swapper/11
49482530,1sleep10-21swapper/11
210682510,4sleep22414399cyclictest2
325522460,1sleep20-21swapper/22
51782410,1sleep20-21swapper/22
2413399296,3cyclictest9-21ksoftirqd/00
24133992920,3cyclictest9-21ksoftirqd/00
194912280,12sleep09-21ksoftirqd/00
2414699271,6cyclictest24220-21munin-run3
2414699265,18cyclictest0-21swapper/33
24146992515,6cyclictest517-21dbus-daemon3
2414699244,18cyclictest28626-21sendmail-mta3
2414699244,18cyclictest27629-21sendmail-mta3
2414699244,18cyclictest15903-21sendmail-mta3
2414699244,17cyclictest0-21swapper/33
2414699243,18cyclictest2866-21sendmail-mta3
2414699243,18cyclictest26223-21sendmail-mta3
2414699242,20cyclictest517-21dbus-daemon3
2414699242,20cyclictest517-21dbus-daemon3
2414699242,19cyclictest515-21avahi-daemon3
2414699241,5cyclictest517-21dbus-daemon3
2414699241,5cyclictest17075-21cron3
24146992415,5cyclictest340-21systemd-journal3
2414699241,4cyclictest6129-21apt-get3
2414699241,20cyclictest29861-21sendmail-msp3
2413399248,5cyclictest9-21ksoftirqd/00
2413399248,5cyclictest9-21ksoftirqd/00
2413399242,2cyclictest111rcu_preempt0
24133992411,3cyclictest9-21ksoftirqd/00
111782240,2sleep12413799cyclictest1
2414699234,17cyclictest23560-21sendmail-mta3
2414699233,18cyclictest7110-21cat3
2414699233,17cyclictest0-21swapper/33
2414699231,4cyclictest13067-1kworker/3:2H3
2414699231,20cyclictest517-21dbus-daemon3
2414699230,5cyclictest11400-21apt-key3
24143992317,4cyclictest31986-21cat2
2413799231,19cyclictest5098-21sendmail-msp1
24133992319,3cyclictest9-21ksoftirqd/00
24133992319,3cyclictest9-21ksoftirqd/00
24133992315,3cyclictest9-21ksoftirqd/00
24133992314,3cyclictest9-21ksoftirqd/00
24133992314,3cyclictest9-21ksoftirqd/00
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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