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2025-12-07 - 01:52
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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 Sat Dec 06, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
308452302265,24sleep30-21swapper/33
298272283213,60sleep10-21swapper/11
3129299268261,4cyclictest30063-21sendmail0
3129599253245,5cyclictest30083-21sendmail1
311002246209,25sleep00-21swapper/00
309402240202,25sleep20-21swapper/22
1161221580,3sleep33130699cyclictest3
3130299107102,3cyclictest30049-21munin-run2
313069910298,2cyclictest30081-21awk3
66762660,3sleep10-21swapper/11
45232580,3sleep335-21ksoftirqd/33
31295995015,20cyclictest3580-21seq1
31295994716,18cyclictest17146-21seq1
133242470,3sleep121-21ksoftirqd/11
12482430,1sleep20-21swapper/22
217622410,1sleep00-21swapper/00
181132410,2sleep20-21swapper/22
155762410,2sleep10-21swapper/11
81422400,11sleep335-21ksoftirqd/33
31295993710,13cyclictest665-21runrttasks1
31295993710,13cyclictest665-21runrttasks1
31292993714,5cyclictest23787-21grep0
73152350,1sleep0101rcuc/00
36642350,2sleep00-21swapper/00
44092340,1sleep30-21swapper/33
31295993311,19cyclictest23234-21expr1
3129599324,4cyclictest505-21dbus-daemon1
31295993210,19cyclictest5046-21run-parts1
31295993210,19cyclictest19720-21tr1
31295993210,19cyclictest19720-21tr1
31295993210,19cyclictest1116-21cat1
3129599319,19cyclictest27526-21date1
31295993115,13cyclictest505-21dbus-daemon1
31295993114,15cyclictest10740-21cat1
31295993114,14cyclictest18338-21expr1
31295993113,15cyclictest18048-21seq1
31295993113,15cyclictest12998-21cat1
31295993112,16cyclictest25135-21expr1
31295993111,17cyclictest21093-21expr1
31295993110,18cyclictest23315-21cut1
3129599310,4cyclictest29935-21cat1
31295993015,12cyclictest27655-21sh1
31295993014,14cyclictest14271-21/usr/sbin/munin1
31295993013,14cyclictest31147-21seq1
31295993011,16cyclictest10967-21seq1
3129599299,17cyclictest13162-21seq1
31295992913,13cyclictest665-21runrttasks1
31295992912,15cyclictest4944-21df1
31295992912,14cyclictest31944-21expr1
3129599290,3cyclictest18352-21apt-get1
31302992810,15cyclictest16461-21cron2
3129599288,18cyclictest9583-21cat1
3129599287,19cyclictest604-21sendmail-mta1
3129599286,4cyclictest24572-21readlink1
31295992811,15cyclictest10097-21seq1
31295992811,15cyclictest10097-21seq1
3130299277,3cyclictest5156-21sendmail-mta2
3130299277,3cyclictest5156-21sendmail-mta2
3129599278,16cyclictest7667-21cpuspeed_turbos1
3129599278,16cyclictest32426-21missed_timers1
3129599278,16cyclictest2780-21cut1
31295992712,13cyclictest18141-21latency1
31295992711,14cyclictest21-21ksoftirqd/11
3129599270,11cyclictest17574-21cron1
3129599268,16cyclictest2082-21systemd-journal1
3129599268,15cyclictest994-21cat1
3129599268,15cyclictest4357-21cstates1
3129599268,15cyclictest0-21swapper/11
3129599262,4cyclictest12382-21munin-run1
31295992613,11cyclictest19036-21/usr/sbin/munin1
3129599259,14cyclictest76822chrt1
3129599259,13cyclictest20232chrt1
3129599258,14cyclictest1672-21gltestperf1
3129599258,14cyclictest0-21swapper/11
3129599257,3cyclictest7765-21grep1
3129599257,15cyclictest26284-21sh1
3129599256,3cyclictest16816-21touch1
3129599255,6cyclictest0-21swapper/11
31306992417,4cyclictest1655-21df3
3129599247,3cyclictest31466-21cat1
3129599247,2cyclictest7169-21latency_hist1
3129599246,15cyclictest153052chrt1
3129599243,3cyclictest0-21swapper/11
3129599241,9cyclictest21903-21apt-get1
3129599241,3cyclictest3269-21apt-get1
3129599241,3cyclictest3269-21apt-get1
31295992411,11cyclictest23110-21/usr/sbin/munin1
31295992411,11cyclictest23110-21/usr/sbin/munin1
31292992418,4cyclictest12390-21sendmail0
31292992416,4cyclictest28039-21basename0
70572230,3sleep00-21swapper/00
3130299237,13cyclictest11062-21latency_hist2
3130299232,18cyclictest23277-21latency_hist2
3130299231,5cyclictest10333-21gdbus2
3130299231,5cyclictest10333-21gdbus2
3130299231,4cyclictest20125-21munin-run2
3130299231,4cyclictest10333-21gdbus2
3130299231,19cyclictest16091-21perf2
3129599235,3cyclictest9755-21seq1
3129599234,4cyclictest0-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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