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2025-11-28 - 09:23
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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 Fri Nov 28, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
171962312197,95sleep20-21swapper/22
157632272187,66sleep30-21swapper/33
1769699268264,2cyclictest0-21swapper/33
173512262204,46sleep00-21swapper/00
172562258220,25sleep10-21swapper/11
1769299254250,2cyclictest0-21swapper/22
2139621560,4sleep11768899cyclictest1
1768899148143,3cyclictest0-21swapper/11
1768399146140,4cyclictest9498-21strings0
189532540,1sleep00-21swapper/00
133232540,1sleep30-21swapper/33
64022530,2sleep26364-21munin-run2
27532530,2sleep20-21swapper/22
174952520,1sleep20-21swapper/22
241572420,3sleep00-21swapper/00
171382400,2sleep20-21swapper/22
93002390,1sleep20-21swapper/22
220312390,1sleep30-21swapper/33
1769699299,16cyclictest8896-40gzip3
1769299271,5cyclictest22650-21munin-run2
1769299244,17cyclictest23403-21latency_hist2
1768399243,19cyclictest0-21swapper/00
1769699231,20cyclictest6664-21kworker/3:13
1769299231,4cyclictest10333-21gdbus2
1768399232,14cyclictest9-21ksoftirqd/00
17683992311,2cyclictest24346-21latency_hist0
1769699222,13cyclictest26591-21chrt3
17696992215,4cyclictest28447-21idleruntime-cro3
17696992214,4cyclictest1-21systemd3
17692992217,3cyclictest28357-21cron2
1769299221,4cyclictest6782-1kworker/2:0H2
1769299221,18cyclictest4348-21munin-run2
1769299220,20cyclictest6433-21kworker/2:02
1768899221,9cyclictest23411-21apt1
17683992216,3cyclictest25441-21sh0
1768399220,12cyclictest4984-21find0
17696992113,4cyclictest505-21dbus-daemon3
17696992113,4cyclictest12875-21sh3
1769299213,16cyclictest2682-21latency_hist2
17692992116,3cyclictest27027-21munin-run2
17692992115,4cyclictest505-21dbus-daemon2
17692992115,4cyclictest20303-21systemctl2
17692992115,4cyclictest10618-21seq2
1769299210,3cyclictest2707-21/usr/sbin/munin2
1769299210,3cyclictest2707-21/usr/sbin/munin2
17688992118,2cyclictest0-21swapper/11
17688992116,3cyclictest3885-21ls1
17688992116,3cyclictest29983-21/usr/sbin/munin1
17688992116,3cyclictest26713-21tail1
17688992115,4cyclictest28874-21seq1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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