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2025-12-16 - 06:07
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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 16, 2025 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22912314278,24sleep00-21swapper/00
23892269232,25sleep30-21swapper/33
23872256183,25sleep10-21swapper/11
25502239179,47sleep20-21swapper/22
275999227220,5cyclictest8892-21munin-run1
276499210202,5cyclictest8897-21cron2
2227521580,1sleep30-21swapper/33
275499129124,3cyclictest571-21gdbus0
276999120115,3cyclictest8900-21apt3
172552510,2sleep20-21swapper/22
301482480,1sleep20-21swapper/22
186192470,2sleep30-21swapper/33
2769994013,15cyclictest662-21runrttasks3
276999383,32cyclictest10660-21sendmail-mta3
276999371,22cyclictest417-21taskset3
276999371,21cyclictest9478-21taskset3
276999351,31cyclictest12032-21gltestperf3
276999341,3cyclictest340-21systemd-journal3
276999340,3cyclictest23414-1kworker/3:2H3
276999340,3cyclictest21734-1kworker/3:0H3
276999340,3cyclictest17392-1kworker/3:1H3
2754993413,18cyclictest418-21cut0
2754993413,18cyclictest418-21cut0
2754993312,18cyclictest9576-21expr0
275499327,22cyclictest517-21dbus-daemon0
2754993210,19cyclictest24749-21cut0
2754993210,19cyclictest21826-21cat0
276999317,21cyclictest2655-21sendmail-mta3
276999317,21cyclictest2655-21sendmail-mta3
276999315,23cyclictest0-21swapper/33
2769993113,15cyclictest21478-21grep3
276999311,28cyclictest340-21systemd-journal3
276999311,28cyclictest2622-1kworker/3:1H3
276999311,25cyclictest4592-21apt-get3
2769993112,17cyclictest4189-21taskset3
276999310,3cyclictest0-21swapper/33
276999310,28cyclictest27676-21sendmail-mta3
275499319,19cyclictest517-21dbus-daemon0
275499319,19cyclictest517-21dbus-daemon0
275499316,4cyclictest517-21dbus-daemon0
2754993114,14cyclictest24756-21apt-get0
275499311,27cyclictest15811-21sendmail0
2754993111,18cyclictest23581-21sed0
276999307,20cyclictest15155-21sendmail-mta3
276999306,21cyclictest0-21swapper/33
276999300,4cyclictest8611-21wc3
276999300,3cyclictest26916-21cstates3
276999300,27cyclictest0-21swapper/33
275499309,19cyclictest517-21dbus-daemon0
275499309,18cyclictest517-21dbus-daemon0
2754993018,10cyclictest3908-21sed0
2754993012,16cyclictest20781-21cut0
2754993011,17cyclictest8024-21expr0
2754993010,17cyclictest21571-21grep0
276999297,19cyclictest22849-21sendmail-mta3
276999297,19cyclictest16281-21grep3
276999293,23cyclictest15800-21munin-run3
276999292,24cyclictest31734-21sendmail-mta3
2769992913,14cyclictest32508-21sendmail-mta3
2769992913,14cyclictest19824-21cat3
2769992913,14cyclictest10127-21cat3
2769992913,13cyclictest3908-21aten2.4-expect3
276999291,25cyclictest15595-21sendmail-mta3
276999290,4cyclictest12060-21aten2_r9power_v3
276999290,3cyclictest6262-21df_inode3
276999290,3cyclictest31367-21df_inode3
276999290,26cyclictest27782-21grep3
275499299,17cyclictest30541-21sendmail-mta0
275499298,18cyclictest340-21systemd-journal0
275499298,18cyclictest340-21systemd-journal0
275499298,18cyclictest17696-21sendmail-mta0
275499293,23cyclictest871-21/usr/sbin/munin0
2754992911,15cyclictest662-21runrttasks0
87452280,3sleep0275499cyclictest0
276999287,18cyclictest9936-21grep3
276999285,20cyclictest517-21dbus-daemon3
276999283,21cyclictest11997-21apt-get3
2769992813,13cyclictest8938-21ls3
276999281,24cyclictest517-21dbus-daemon3
2769992812,13cyclictest32520-21expr3
2769992812,13cyclictest32520-21expr3
2769992812,13cyclictest30991-21sendmail-mta3
276999280,2cyclictest754-21cut3
276999280,2cyclictest29976-21switchtime3
276499280,9cyclictest26785-21cat2
275499289,17cyclictest4569-21sendmail-mta0
275499289,17cyclictest31734-21sendmail-mta0
275499289,16cyclictest6387-21grep0
275499289,16cyclictest16605-21mailstats0
275499289,16cyclictest16605-21mailstats0
275499288,18cyclictest13717-21cron0
275499288,18cyclictest0-21swapper/00
275499288,17cyclictest32198-21sed0
275499287,4cyclictest518-21in:imuxsock0
275499286,4cyclictest928-21ls0
275499281,24cyclictest11069-21apt-get0
2754992811,14cyclictest18807-21seq0
291952270,1sleep10-21swapper/11
276999279,15cyclictest24020-21tr3
276999278,17cyclictest20470-21cut3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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