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2025-09-18 - 15:28
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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 100 highest latencies:
System rack9slot2.osadl.org (updated Thu Sep 18, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
274472298203,84sleep30-21swapper/33
2880599288282,4cyclictest0-21swapper/00
2880599288282,4cyclictest0-21swapper/00
2880999284279,3cyclictest5293-21apt-get1
2880999284279,3cyclictest5293-21apt-get1
276652283241,29sleep10-21swapper/11
286132270233,24sleep00-21swapper/00
285272267229,25sleep20-21swapper/22
2881299179175,2cyclictest0-21swapper/22
2881299179175,2cyclictest0-21swapper/22
2881999169165,2cyclictest0-21swapper/33
2881999169165,2cyclictest0-21swapper/33
310552680,2sleep10-21swapper/11
279172490,2sleep10-21swapper/11
2881999471,18cyclictest9187-21latency_hist3
105882420,2sleep30-21swapper/33
2881999391,22cyclictest16588-21ntpq3
2881999370,21cyclictest3119-21date3
28812993514,16cyclictest505-21dbus-daemon2
2881999341,30cyclictest2701-21ntpq3
2881999341,18cyclictest0-21swapper/33
2881299345,6cyclictest0-21swapper/22
2881299341,30cyclictest404-21munin-run2
28812993314,16cyclictest9517-21cut2
28812993313,17cyclictest2082-21systemd-journal2
2880599330,31cyclictest23786-21kworker/0:00
18222330,1sleep30-21swapper/33
154832330,2sleep20-21swapper/22
2881299322,4cyclictest505-21dbus-daemon2
2881299321,29cyclictest11420-21cat2
28819993114,14cyclictest6499-21df3
28819993114,14cyclictest6499-21df3
2881299311,27cyclictest13950-21cpuspeed_turbos2
2881299311,27cyclictest10020-21missed_timers2
2881299310,29cyclictest0-21swapper/22
28819993014,13cyclictest18596-21ntp_states3
2881999301,16cyclictest0-21swapper/33
2881299309,3cyclictest172352chrt2
2881299305,22cyclictest30945-21munin-node2
2881299302,10cyclictest27498-21apt-get2
28812993014,13cyclictest28709-21kernelversion2
2881299301,26cyclictest12324-21head2
28812993012,15cyclictest5862-21uname2
28812993011,15cyclictest2149-21df2
2881299300,1cyclictest0-21swapper/22
28819992913,14cyclictest10823-21date3
28819992912,15cyclictest4306-21gzip3
2881299297,17cyclictest0-21swapper/22
2881299293,5cyclictest0-21swapper/22
2881299291,4cyclictest3537-21ls2
2881299290,10cyclictest227602chrt2
2881299290,10cyclictest227602chrt2
2881999289,16cyclictest3326-21ls3
28819992813,13cyclictest25585-21latency_hist3
28819992813,13cyclictest22755-21cat3
28819992811,15cyclictest11327-21basename3
28819992811,14cyclictest28459-21expr3
28819992810,15cyclictest9700-21diskstats3
28819992810,15cyclictest21708-21sed3
28819992810,15cyclictest11976-21expr3
2881299289,4cyclictest7989-21date2
2881299289,4cyclictest7989-21date2
2881299287,4cyclictest30783-21sh2
2881299285,5cyclictest505-21dbus-daemon2
2881299282,9cyclictest683-21apt-get2
2881299282,9cyclictest25842-21apt-get2
2881299282,5cyclictest12958-21apt-get2
2881299282,4cyclictest8117-21apt-get2
2881299281,7cyclictest28507-21munin-run2
28812992810,3cyclictest23284-21apt-key2
2881999279,15cyclictest18934-21cat3
28819992712,13cyclictest31950-21cstates3
28819992712,13cyclictest27606-21ntp_offset3
28819992711,14cyclictest15472-21cut3
28819992710,15cyclictest7145-21expr3
28819992710,15cyclictest7145-21expr3
28819992710,14cyclictest21503-21expr3
28819992710,14cyclictest21503-21expr3
2881299279,3cyclictest33602chrt2
2881299279,3cyclictest21539-21latency_hist2
2881299278,4cyclictest1609-21idleruntime-cro2
2881299278,3cyclictest232532chrt2
2881299272,5cyclictest18315-21apt-get2
2881299272,4cyclictest0-21swapper/22
2881299271,8cyclictest4583-21idleruntime-cro2
2881299271,7cyclictest13987-21perf2
2881299271,24cyclictest0-21swapper/22
2881299271,23cyclictest17515-21head2
28812992711,13cyclictest4406-21kernelversion2
2881299270,25cyclictest0-21swapper/22
2881999269,14cyclictest16266-21apt-get3
2881999261,23cyclictest6578-21cron3
28819992612,11cyclictest15474-21grep3
2881999261,20cyclictest3202-21apt-get3
2881999261,20cyclictest25842-21apt-get3
28819992610,14cyclictest361-21unixbench-2d3
28819992610,14cyclictest28263-21expr3
28819992610,13cyclictest13339-21expr3
2881999260,1cyclictest0-21swapper/33
2881299269,3cyclictest24434-21apt-key2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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