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2025-11-12 - 21:02
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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 Wed Nov 12, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1293899278273,3cyclictest0-21swapper/11
122672273210,46sleep00-21swapper/00
126242259187,24sleep30-21swapper/33
124412247173,39sleep20-21swapper/22
125062238179,46sleep10-21swapper/11
1293499215209,4cyclictest24683-21strings0
1294999199195,3cyclictest0-21swapper/33
1294599183179,2cyclictest0-21swapper/22
460821630,5sleep24613-21gltestperf2
33421440,1sleep00-21swapper/00
145692510,3sleep121-21ksoftirqd/11
67182460,4sleep11293899cyclictest1
158452450,2sleep30-21swapper/33
1293899310,29cyclictest6389-21kworker/1:21
86732280,6sleep121-21ksoftirqd/11
12945992613,11cyclictest11102-21df_inode2
12938992618,5cyclictest10220-21date1
12949992516,4cyclictest12124-21apt-config3
12949992315,5cyclictest2082-21systemd-journal3
1294599231,19cyclictest26213-21sed2
12938992318,3cyclictest26750-21cut1
12938992317,4cyclictest1439-21cron1
12949992213,5cyclictest2082-21systemd-journal3
1294599223,17cyclictest10490-21cat2
1294599221,4cyclictest7550-21munin-run2
1294599221,3cyclictest17512-21/usr/sbin/munin2
1294599221,3cyclictest17512-21/usr/sbin/munin2
1294599221,19cyclictest7979-21perf2
12945992210,10cyclictest8425-21date2
1294599220,5cyclictest21876-1kworker/2:0H2
12938992216,3cyclictest1859-21idleruntime-cro1
12938992216,3cyclictest1859-21idleruntime-cro1
12949992115,4cyclictest24983-21cpuspeed3
12949992114,4cyclictest665-21runrttasks3
12949992114,4cyclictest11647-21idleruntime-cro3
1294999211,18cyclictest21358-21grep3
1294599212,17cyclictest29842-21latency_hist2
12945992115,4cyclictest5455-21grep2
12945992115,4cyclictest29293-21df2
12945992115,4cyclictest1474-21sendmail2
12945992114,5cyclictest17767-21sendmail2
1294599211,18cyclictest29585-21apt-get2
1294599211,18cyclictest22519-21/usr/sbin/munin2
1294599211,17cyclictest14489-21munin-run2
1294599211,17cyclictest12138-21cstates2
1293899215,4cyclictest505-21dbus-daemon1
12938992116,3cyclictest28879-21apt-get1
12938992115,4cyclictest30530-21diskstats1
12938992114,4cyclictest19681-21seq1
1293499211,9cyclictest10333-21gdbus0
12934992116,3cyclictest18713-21/usr/sbin/munin0
12934992115,4cyclictest5514-21cron0
65982200,16sleep00-21swapper/00
41352200,1sleep20-21swapper/22
312442200,3sleep11293899cyclictest1
286382200,9sleep09-21ksoftirqd/00
1294999203,9cyclictest8218-21apt-get3
12949992015,3cyclictest27311-21unixbench-2d3
12949992014,4cyclictest4476-21sed3
12949992014,4cyclictest12531-21cat3
1294999201,3cyclictest185062grep3
12949992013,4cyclictest665-21runrttasks3
12949992013,4cyclictest22109-21grep3
12949992013,4cyclictest2082-21systemd-journal3
12949992013,4cyclictest18373-21if_enp3s03
1294599202,13cyclictest14749-21apt-get2
12945992016,2cyclictest1224-21/usr/sbin/munin2
12945992015,3cyclictest6026-21seq2
12945992015,3cyclictest26145-21aten2_r9power_v2
12945992015,3cyclictest24031-21cat2
12945992015,3cyclictest2369-21sed2
12945992015,3cyclictest22867-21/usr/sbin/munin2
12945992015,3cyclictest22623-21sh2
12945992015,3cyclictest17972-21cpu2
12945992015,3cyclictest17532-21ntp_kernel_pll_2
12945992015,3cyclictest17532-21ntp_kernel_pll_2
12945992014,4cyclictest3149-21if_err_enp3s02
12945992014,4cyclictest20228-21df2
12945992014,3cyclictest19146-21sh2
12945992014,3cyclictest13675-21munin-run2
1294599201,17cyclictest3710-21cat2
1294599201,17cyclictest31868-21munin-run2
1294599201,17cyclictest11206-21procmail2
1294599200,3cyclictest31064-1kworker/2:1H2
1294599200,3cyclictest1965-21cat2
1294599200,3cyclictest1965-21cat2
12938992015,3cyclictest7605-21cut1
12938992015,3cyclictest26845-21/usr/sbin/munin1
12938992015,3cyclictest22466-21seq1
12938992015,3cyclictest21-21ksoftirqd/11
12938992014,4cyclictest351-21cat1
12938992014,4cyclictest21407-21seq1
12938992014,4cyclictest17860-21sed1
12938992014,3cyclictest665-21runrttasks1
1293899201,17cyclictest11648-21munin-plugin-st1
1293899200,18cyclictest19690-21ntpq1
1293899200,17cyclictest24695-21wc1
12934992015,3cyclictest6224-21sh0
12934992015,3cyclictest18752-21proc_pri0
12934992015,3cyclictest15513-21sed0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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