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2025-12-30 - 02:37
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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 Tue Dec 30, 2025 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32052269176,23sleep10-21swapper/11
32162257221,24sleep20-21swapper/22
31972257179,43sleep30-21swapper/33
30472252192,48sleep00-21swapper/00
1599721190,3sleep2349099cyclictest2
269752640,4sleep026980-21unixbench_singl0
162862560,2sleep216282-21perf2
222512500,2sleep30-21swapper/33
271512490,1sleep20-21swapper/22
52132460,3sleep30-21swapper/33
110302400,10sleep121-21ksoftirqd/11
348699390,37cyclictest23052-21kworker/1:11
349099350,33cyclictest8504-21kworker/2:12
3483993513,19cyclictest31474-21cron0
3483993413,18cyclictest4095-21cut0
3483993312,18cyclictest4892-21cat0
3483993311,19cyclictest14673-21awk0
348399328,21cyclictest517-21dbus-daemon0
3483993212,18cyclictest5407-21cat0
3483993211,18cyclictest32044-21sendmail-mta0
3483993211,18cyclictest10679-21sendmail-mta0
3483993210,19cyclictest15995-21sendmail-mta0
104952320,3sleep0348399cyclictest0
348399319,4cyclictest517-21dbus-daemon0
3483993111,17cyclictest517-21dbus-daemon0
3483993110,18cyclictest16944-21sendmail-mta0
348399309,19cyclictest517-21dbus-daemon0
348399308,4cyclictest517-21dbus-daemon0
348399308,3cyclictest20770-21aten2_r9power_v0
3483993014,14cyclictest7517-21/usr/sbin/munin0
3483993012,15cyclictest10017-21latency_hist0
3483993011,16cyclictest31783-21aten2_r9power_e0
3483993010,17cyclictest340-21systemd-journal0
3483993010,17cyclictest32145-21cat0
348399299,3cyclictest517-21dbus-daemon0
348399299,3cyclictest517-21dbus-daemon0
348399299,3cyclictest10884-21grep0
348399298,5cyclictest340-21systemd-journal0
348399298,4cyclictest340-21systemd-journal0
348399298,4cyclictest27972-21sendmail-mta0
348399297,4cyclictest517-21dbus-daemon0
348399297,4cyclictest340-21systemd-journal0
348399291,9cyclictest340-21systemd-journal0
348399291,10cyclictest340-21systemd-journal0
3483992910,17cyclictest30276-21latency_hist0
3483992910,16cyclictest18836-21ls0
348399289,3cyclictest17121-21cat0
348399289,3cyclictest14300-21ntpq0
348399289,3cyclictest12877-21sendmail-mta0
348399281,10cyclictest340-21systemd-journal0
3483992810,16cyclictest662-21runrttasks0
3483992810,15cyclictest28263-21if_enp3s00
348399277,4cyclictest10872-21cat0
348399277,3cyclictest0-21swapper/00
348399276,4cyclictest1480-21aten2.4-expect0
348399275,5cyclictest28592-21cron0
3483992710,15cyclictest662-21runrttasks0
264272270,3sleep2349099cyclictest2
348399269,3cyclictest26402-21latency_hist0
348399267,3cyclictest517-21dbus-daemon0
348399267,17cyclictest0-21swapper/00
348399267,16cyclictest0-21swapper/00
348399262,5cyclictest23719-21apt-get0
348399261,6cyclictest515-21avahi-daemon0
349599255,17cyclictest0-21swapper/33
348399258,2cyclictest29617-21cat0
348399257,2cyclictest15175-21cat0
348399252,6cyclictest8650-21apt-get0
349599244,17cyclictest0-21swapper/33
349599243,18cyclictest27972-21sendmail-mta3
3486992416,5cyclictest8772-21sh1
348399247,3cyclictest312-21cstates0
348399247,3cyclictest312-21cstates0
348399247,2cyclictest23183-21taskset0
348399246,3cyclictest11342-21packagekitd0
348399245,5cyclictest638-21ntpd0
348399245,5cyclictest638-21ntpd0
348399244,3cyclictest13369-21rt-features0
348399242,4cyclictest19872-21apt-get0
348399241,6cyclictest19150-21cron0
94532230,2sleep30-21swapper/33
349599238,13cyclictest0-21swapper/33
349599235,16cyclictest0-21swapper/33
349599234,17cyclictest5310-21sendmail-mta3
349599234,17cyclictest29308-21sendmail-mta3
349599234,17cyclictest2149-21sendmail-mta3
349599234,17cyclictest12877-21sendmail-mta3
349599232,18cyclictest0-21swapper/33
349599231,4cyclictest16841-21/usr/sbin/munin3
349599231,20cyclictest517-21dbus-daemon3
3495992310,3cyclictest662-21runrttasks3
349099238,3cyclictest42742grep2
348399236,2cyclictest17328-21apt-key0
349599224,16cyclictest21064-21sendmail-mta3
349599224,16cyclictest19457-21sendmail-mta3
349599224,16cyclictest19457-21sendmail-mta3
349599223,17cyclictest944-21sendmail-mta3
349599223,17cyclictest8486-21sendmail-mta3
349599223,17cyclictest5083-21sendmail-mta3
349599223,17cyclictest18188-21sendmail-mta3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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