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2025-12-21 - 06:53
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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 50 highest latencies:
System rack9slot2.osadl.org (updated Sun Dec 21, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
76682303219,69sleep30-21swapper/33
76352261186,18sleep20-21swapper/22
76852258182,26sleep00-21swapper/00
801199254250,2cyclictest0-21swapper/22
77422247186,48sleep10-21swapper/11
801799243239,2cyclictest0-21swapper/33
800399239234,3cyclictest17170-21strings0
2281321640,2sleep2801199cyclictest2
255362500,4sleep1800799cyclictest1
19182500,3sleep00-21swapper/00
19182500,3sleep00-21swapper/00
144632490,2sleep30-21swapper/33
289982460,1sleep128982-21pmu-power1
91032440,1sleep00-21swapper/00
300562420,3sleep330052-21turbostat3
800399361,16cyclictest21353-21cron0
8003993513,4cyclictest16267-21expr0
8003993512,4cyclictest1109-21expr0
8003993512,4cyclictest1109-21expr0
8003993512,4cyclictest10036-21date0
800799340,32cyclictest24176-21kworker/1:21
8003993413,3cyclictest5491-21/usr/sbin/munin0
8003993313,3cyclictest5037-21seq0
8003993213,3cyclictest7545-21/usr/sbin/munin0
800399311,7cyclictest32435-21apt-get0
800399291,8cyclictest28053-21chrt0
801799277,3cyclictest0-21swapper/33
8003992612,4cyclictest9442-21unixbench_multi0
52962260,2sleep20-21swapper/22
801799245,4cyclictest515-21avahi-daemon3
801799243,18cyclictest25827-21sendmail-mta3
801799241,20cyclictest571-21gdbus3
801799234,17cyclictest9767-21sendmail-mta3
801799234,17cyclictest7771-21sendmail-mta3
801799233,18cyclictest25294-21sendmail-mta3
801799233,18cyclictest17069-21sendmail-mta3
801799233,17cyclictest32026-21sendmail-mta3
801799232,18cyclictest8913-21sendmail-mta3
801799231,4cyclictest340-21systemd-journal3
801199234,17cyclictest23926-21sendmail2
8011992311,8cyclictest845-21apt-get2
8011992311,8cyclictest845-21apt-get2
8011992310,11cyclictest517-21dbus-daemon2
800399233,11cyclictest9-21ksoftirqd/00
8003992317,4cyclictest5871-21cron0
801799223,17cyclictest9194-21sendmail-mta3
801799223,17cyclictest5096-21sendmail-mta3
801799223,17cyclictest4821-21sendmail-mta3
801799223,17cyclictest29357-21sendmail-mta3
801799223,17cyclictest28469-21sendmail-mta3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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