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2025-12-29 - 05:33
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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 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
2840099220,19cyclictest15398-1kworker/3:1H3
2839699229,11cyclictest11505-21cat2
28392992211,3cyclictest22967-21latency_hist1
96642210,2sleep00-21swapper/00
2840099218,12cyclictest35-21ksoftirqd/33
2840099216,13cyclictest662-21runrttasks3
2840099216,13cyclictest662-21runrttasks3
2840099211,4cyclictest11238-21cups-browsed3
2840099211,18cyclictest7916-21/usr/sbin/munin3
2840099211,18cyclictest15058-21taskset3
2840099211,17cyclictest340-21systemd-journal3
2840099211,17cyclictest28055-1kworker/3:0H3
28400992110,6cyclictest7608-21apt-get3
2840099210,19cyclictest5307-21munin-run3
2840099210,19cyclictest16283-21kworker/3:33
28396992116,3cyclictest12604-21open_files2
28396992115,4cyclictest9037-21seq2
28396992115,4cyclictest25402-21perf2
28396992114,4cyclictest28980-21df_inode2
28396992114,4cyclictest28980-21df_inode2
28396992114,4cyclictest1597-21sed2
2839699211,17cyclictest31419-21unixbench_singl2
2839299211,18cyclictest2620-21turbostat.cron1
28390992118,2cyclictest0-21swapper/00
28390992116,3cyclictest517-21dbus-daemon0
28390992116,3cyclictest3456-21sort0
28390992113,5cyclictest14039-21latency0
158092210,3sleep10-21swapper/11
28400992015,3cyclictest25002-21munin-run3
28400992015,3cyclictest17603-21aten2_r9power_v3
28400992015,3cyclictest16847-21vmstat3
28400992014,4cyclictest1715-21hostname3
28400992014,4cyclictest16366-21cat3
2840099201,17cyclictest2909-21cat3
2840099201,17cyclictest26041-21cat3
2840099200,3cyclictest566-21polkitd3
2840099200,3cyclictest31847-21perf3
2840099200,3cyclictest28055-1kworker/3:0H3
2839699202,15cyclictest18315-21sort2
28396992017,2cyclictest0-21swapper/22
28396992015,3cyclictest637-21timerwakeupswit2
28396992015,3cyclictest30234-21entropy2
28396992015,3cyclictest19642-21sed2
28396992015,3cyclictest15103-21ls2
28396992014,4cyclictest27807-21seq2
28396992014,4cyclictest25874-21ls2
28396992014,4cyclictest15111-21seq2
28396992014,4cyclictest11820-21sort2
28396992013,5cyclictest517-21dbus-daemon2
28392992014,4cyclictest517-21dbus-daemon1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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