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2025-10-29 - 21:32
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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 Wed Oct 29, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
307512291254,24sleep30-21swapper/33
3107399288281,5cyclictest9324-21munin-run3
307282277247,17sleep00-21swapper/00
309182271232,26sleep20-21swapper/22
307142270190,43sleep10-21swapper/11
3106599174168,4cyclictest9350-21basename1
1668921300,4sleep33107399cyclictest3
310642700,2sleep20-21swapper/22
132112640,1sleep00-21swapper/00
296682620,1sleep20-21swapper/22
163302480,3sleep2271rcuc/22
3106899261,7cyclictest10333-21gdbus2
31065992618,5cyclictest28853-21sendmail1
31068992513,10cyclictest28-21ksoftirqd/22
3106599257,3cyclictest249062ls1
31068992413,9cyclictest29806-21/usr/sbin/munin2
3106899241,20cyclictest264482sleep22
3106899241,20cyclictest264482sleep22
31060992420,2cyclictest190682sleep00
3107399237,7cyclictest35-21ksoftirqd/33
3107399232,18cyclictest1758-21cut3
3106899234,17cyclictest0-21swapper/22
3106899232,18cyclictest4564-21awk2
3106899231,5cyclictest15885-21/usr/sbin/munin2
3106899231,4cyclictest23160-21munin-run2
3106899231,3cyclictest32463-21perf2
3106899231,19cyclictest10333-21gdbus2
31073992212,5cyclictest19347-21apt-get3
3106899224,16cyclictest12728-21sendmail2
3106899223,17cyclictest4307-21cat2
3106899221,5cyclictest3274-21sendmail-mta2
3106899221,4cyclictest7948-21rs:main2
3106899221,4cyclictest10333-21gdbus2
3106899221,4cyclictest10333-21gdbus2
3106899221,18cyclictest2082-21systemd-journal2
3106899221,18cyclictest18748-1kworker/2:0H2
3106899221,18cyclictest11566-1kworker/2:2H2
31068992210,10cyclictest28-21ksoftirqd/22
3106899220,5cyclictest28380-21ls2
3106899220,20cyclictest0-21swapper/22
31065992216,4cyclictest21143-21tr1
3106099228,12cyclictest21027-21cut0
31060992217,3cyclictest25162-21cut0
31060992217,3cyclictest25162-21cut0
31060992217,3cyclictest15810-21cut0
31060992216,4cyclictest4853-21diskstats0
31060992210,3cyclictest214362cut0
31073992115,4cyclictest4813-21sendmail_mailst3
31073992115,4cyclictest24828-21switchtime3
31073992115,4cyclictest24828-21switchtime3
31073992115,4cyclictest1373-21wc3
31073992115,4cyclictest12944-21ntpq3
31073992114,4cyclictest27806-21sh3
31073992114,4cyclictest22397-21users3
3106899213,16cyclictest21993-21latency_hist2
3106899212,17cyclictest6191-21latency_hist2
3106899212,16cyclictest18697-21latency_hist2
31068992115,3cyclictest14629-21cron2
3106899211,3cyclictest4588-1kworker/2:3H2
3106899211,3cyclictest2082-21systemd-journal2
3106899211,3cyclictest11566-1kworker/2:2H2
3106899211,18cyclictest18748-1kworker/2:0H2
3106899211,17cyclictest22373-21latency_hist2
3106899211,17cyclictest18121-21cat2
3106899211,17cyclictest11566-1kworker/2:2H2
3106899210,4cyclictest3509-21cron2
3106899210,3cyclictest27514-21munin-run2
3106899210,18cyclictest456-21latency_hist2
31065992115,4cyclictest8099-21seq1
31065992115,3cyclictest16689-21perf1
31060992115,4cyclictest20533-21sed0
31060992115,4cyclictest11851-21sendmail-mta0
31073992016,2cyclictest11961-21timerandwakeup3
31073992015,3cyclictest29177-21idleruntime3
31073992015,3cyclictest27134-21fw_packets3
31073992015,3cyclictest21386-21find3
31073992015,3cyclictest15379-21awk3
31073992015,3cyclictest13516-21kernelversion3
31073992014,4cyclictest505-21dbus-daemon3
31073992014,4cyclictest3046-21latency3
31073992014,4cyclictest10005-21cat3
31073992014,3cyclictest8704-21sort3
31073992013,4cyclictest31903-21sed3
31073992013,4cyclictest2082-21systemd-journal3
3106899203,13cyclictest14892-21apt-get2
3106899203,12cyclictest0-21swapper/22
31068992016,2cyclictest22766-21latency_hist2
31068992015,3cyclictest505-21dbus-daemon2
31068992015,3cyclictest25095-21grep2
3106899201,3cyclictest4588-1kworker/2:3H2
3106899200,5cyclictest0-21swapper/22
3106899200,4cyclictest0-21swapper/22
31065992015,3cyclictest3212-21cron1
31065992015,3cyclictest27161-21seq1
31065992015,3cyclictest20197-21seq1
31065992015,3cyclictest10652-21dump-pmu-power1
31065992014,4cyclictest9894-21seq1
31065992014,4cyclictest6173-21grep1
31065992014,4cyclictest29147-21expr1
31065992014,4cyclictest13343-21sed1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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