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2025-12-15 - 12:53
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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 Mon Dec 15, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
170662316248,54sleep30-21swapper/33
171152285255,18sleep20-21swapper/22
168952268196,40sleep10-21swapper/11
169342261190,25sleep00-21swapper/00
1739599233227,4cyclictest10489-21sleep3
1738699152144,6cyclictest292-21jbd2/mmcblk0p2-1
1431521490,2sleep31739599cyclictest3
1737899130125,3cyclictest10449-21cron0
173909910598,5cyclictest518-21in:imuxsock2
246602660,4sleep024653-21cron0
81472450,2sleep38148-21unixbench_singl3
316562420,1sleep20-21swapper/22
26482410,2sleep32651-21latency_hist3
241292400,1sleep00-21swapper/00
17395993013,4cyclictest35-21ksoftirqd/33
1739599290,27cyclictest21302-21kworker/3:13
17395992816,2cyclictest35-21ksoftirqd/33
17395992812,14cyclictest35-21ksoftirqd/33
17395992723,3cyclictest341rcuc/33
17395992715,11cyclictest35-21ksoftirqd/33
17395992617,3cyclictest35-21ksoftirqd/33
17395992613,11cyclictest35-21ksoftirqd/33
1739599255,17cyclictest14021-21sendmail-mta3
17395992510,4cyclictest35-21ksoftirqd/33
1738699258,2cyclictest14783-21/usr/sbin/munin1
17386992515,6cyclictest517-21dbus-daemon1
17395992416,3cyclictest35-21ksoftirqd/33
17395992411,11cyclictest35-21ksoftirqd/33
17395992411,11cyclictest35-21ksoftirqd/33
17390992417,4cyclictest24662-21sh2
241602230,1sleep20-21swapper/22
230742230,2sleep30-21swapper/33
1739599233,18cyclictest7974-21sendmail-mta3
1739599232,18cyclictest22719-21cat3
1739599232,18cyclictest0-21swapper/33
17395992311,3cyclictest35-21ksoftirqd/33
1739599230,20cyclictest6078-21munin-run3
1739599229,11cyclictest29459-21forks3
1739599224,16cyclictest30081-21sendmail-mta3
1739599224,16cyclictest28617-21sendmail-mta3
1739599224,16cyclictest26031-21sendmail-mta3
1739599224,16cyclictest12461-21sendmail-mta3
1739599223,17cyclictest4497-21awk3
1739599223,17cyclictest3904-21sendmail-mta3
1739599223,17cyclictest27892-21sendmail-mta3
1739599223,17cyclictest24565-21sendmail-mta3
1739599223,17cyclictest23839-21sendmail-mta3
1739599223,17cyclictest21948-21sendmail-mta3
17395992219,2cyclictest341rcuc/33
1739599221,4cyclictest6820-1kworker/3:0H3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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