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2025-12-21 - 23:12
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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 100 highest latencies:
System rack9slot2.osadl.org (updated Sun Dec 21, 2025 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
248562334271,50sleep00-21swapper/00
251042272191,68sleep30-21swapper/33
250232258201,47sleep20-21swapper/22
248572250200,38sleep10-21swapper/11
2530999237231,4cyclictest26962-21munin-run0
1950821520,1sleep00-21swapper/00
2532099141135,3cyclictest26953-21idleruntime-cro3
2709321310,3sleep22531799cyclictest2
2531799112106,3cyclictest26955-21apt-get2
25314999893,3cyclictest26958-21perf1
282152570,1sleep10-21swapper/11
273992540,4sleep227322-21munin-node2
277422470,1sleep20-21swapper/22
2532099412,24cyclictest0-21swapper/33
2532099371,5cyclictest19271-1kworker/3:1H3
2532099371,4cyclictest517-21dbus-daemon3
2532099371,4cyclictest340-21systemd-journal3
2532099371,33cyclictest340-21systemd-journal3
2532099362,31cyclictest13147-21sendmail-mta3
2532099362,30cyclictest6062-21sendmail-mta3
2532099361,5cyclictest515-21avahi-daemon3
2532099361,5cyclictest515-21avahi-daemon3
25320993615,18cyclictest28647-21sendmail-mta3
2532099361,4cyclictest518-21in:imuxsock3
2532099361,4cyclictest518-21in:imuxsock3
25320993614,19cyclictest1988-21sendmail-mta3
2532099361,3cyclictest340-21systemd-journal3
2532099361,32cyclictest340-21systemd-journal3
72022350,10sleep121-21ksoftirqd/11
2532099353,29cyclictest9617-21sendmail-mta3
2532099353,29cyclictest10159-21sendmail-mta3
2532099352,30cyclictest7633-21sendmail-mta3
25320993516,16cyclictest31163-21sendmail-mta3
25320993516,16cyclictest18620-21sendmail-mta3
2532099351,4cyclictest520-21rs:main3
2532099351,4cyclictest520-21rs:main3
2532099351,31cyclictest4696-21sendmail-mta3
25320993416,15cyclictest30320-21sendmail-mta3
2532099341,30cyclictest19271-1kworker/3:1H3
2532099340,31cyclictest9087-21sendmail-mta3
2532099331,29cyclictest21836-21sendmail-mta3
2532099331,29cyclictest16097-21sendmail-mta3
25320993312,18cyclictest17237-21sendmail-mta3
2532099330,5cyclictest4113-21cpuspeed_turbos3
236332330,2sleep20-21swapper/22
2532099327,22cyclictest517-21dbus-daemon3
2532099321,4cyclictest19271-1kworker/3:1H3
25320993211,19cyclictest29477-21sendmail-mta3
25320993211,18cyclictest3446-21sendmail-mta3
2532099312,26cyclictest340-21systemd-journal3
2532099310,4cyclictest517-21dbus-daemon3
2532099307,20cyclictest517-21dbus-daemon3
2532099302,22cyclictest12411-21apt-get3
2532099301,26cyclictest0-21swapper/33
2532099292,5cyclictest30727-21apt-get3
2532099291,7cyclictest6895-21systemctl3
25320992912,14cyclictest30178-21aten2_r9power_c3
25320992911,16cyclictest31650-21latency_hist3
2532099290,26cyclictest28433-21munin-run3
25317992913,6cyclictest28-21ksoftirqd/22
25314992911,9cyclictest21-21ksoftirqd/11
25314992911,4cyclictest21-21ksoftirqd/11
2532099289,16cyclictest2372-21unixbench_singl3
2532099283,5cyclictest27599-21cron3
2532099282,5cyclictest10029-21apt-get3
2532099281,5cyclictest12332-21munin-run3
25320992812,14cyclictest19418-21latency_hist3
2531799282,9cyclictest14545-21procmail2
2531499280,26cyclictest32246-21kworker/1:21
88032270,2sleep20-21swapper/22
2532099279,15cyclictest32532-21cstates3
2532099278,16cyclictest25315-21cstates3
2532099277,17cyclictest29885-21cron3
2532099273,21cyclictest31898-21cstates3
2532099272,3cyclictest0-21swapper/33
2532099271,4cyclictest1552-21apt-get3
2532099271,4cyclictest0-21swapper/33
25320992712,12cyclictest662-21runrttasks3
25317992712,6cyclictest28-21ksoftirqd/22
2531499279,4cyclictest21-21ksoftirqd/11
2531499276,13cyclictest518-21in:imuxsock1
2531499275,4cyclictest21-21ksoftirqd/11
2531499274,3cyclictest21-21ksoftirqd/11
25314992718,3cyclictest21-21ksoftirqd/11
25314992718,3cyclictest21-21ksoftirqd/11
25314992718,3cyclictest21-21ksoftirqd/11
25314992714,4cyclictest21-21ksoftirqd/11
25314992713,3cyclictest21-21ksoftirqd/11
2531499270,4cyclictest21-21ksoftirqd/11
2532099263,4cyclictest11382-21latency_hist3
2532099262,5cyclictest16822-21cpuspeed_turbos3
2532099262,4cyclictest27505-21apt-get3
2532099262,4cyclictest19027-21apt-get3
2532099261,5cyclictest9818-21munin-run3
2531799261,10cyclictest20331-21awk2
2531799261,10cyclictest20331-21awk2
2531799260,14cyclictest28-21ksoftirqd/22
2531499264,7cyclictest21-21ksoftirqd/11
2531499264,13cyclictest21-21ksoftirqd/11
2531499263,5cyclictest21-21ksoftirqd/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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