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2025-12-29 - 07:34
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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 Mon Dec 29, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
277432296213,65sleep30-21swapper/33
267272257171,28sleep20-21swapper/22
280812250217,22sleep00-21swapper/00
279982241207,21sleep10-21swapper/11
3146221640,2sleep32840099cyclictest3
125832610,4sleep12839299cyclictest1
307112540,3sleep32840099cyclictest3
270692540,2sleep00-21swapper/00
164602450,1sleep10-21swapper/11
28392993512,4cyclictest517-21dbus-daemon1
28392993413,3cyclictest26926-21if_enp3s01
313482330,2sleep00-21swapper/00
28392993314,2cyclictest13719-21/usr/sbin/munin1
67492300,7sleep3351ksoftirqd/33
2839299292,7cyclictest4930-21apt-get1
28392992912,4cyclictest9864-21interrupts1
2840099277,17cyclictest0-21swapper/33
28396992613,3cyclictest5675-21cut2
2840099255,18cyclictest515-21avahi-daemon3
2840099255,17cyclictest0-21swapper/33
2840099254,18cyclictest27975-21sendmail-mta3
2840099253,19cyclictest11004-21cron3
2839699250,23cyclictest19281-21kworker/2:22
43272240,3sleep10-21swapper/11
2840099244,17cyclictest0-21swapper/33
2840099242,19cyclictest0-21swapper/33
2840099234,2cyclictest0-21swapper/33
2840099234,17cyclictest27345-21sendmail-mta3
2840099233,18cyclictest3115-21sendmail-mta3
2840099233,18cyclictest13143-21latency_hist3
2840099232,3cyclictest0-21swapper/33
28400992317,4cyclictest20939-21perf3
2840099231,4cyclictest518-21in:imuxsock3
2840099231,4cyclictest28055-1kworker/3:0H3
2840099231,4cyclictest13472-21munin-run3
28400992313,1cyclictest0-21swapper/33
2839699233,18cyclictest23333-21sh2
2839699230,14cyclictest96562/usr/sbin/munin2
241582230,2sleep30-21swapper/33
199592230,3sleep10-21swapper/11
2840099226,14cyclictest0-21swapper/33
2840099223,17cyclictest19469-21sendmail-mta3
2840099223,17cyclictest12284-21sendmail-mta3
2840099222,3cyclictest0-21swapper/33
28400992215,4cyclictest25455-21perf3
2840099221,3cyclictest515-21avahi-daemon3
2840099221,3cyclictest2872-1kworker/3:2H3
2840099221,19cyclictest15393-21taskset3
2840099221,18cyclictest517-21dbus-daemon3
2840099220,19cyclictest17145-21munin-run3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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