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2026-04-19 - 23:52
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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 50 highest latencies:
System rack9slot2.osadl.org (updated Sun Apr 19, 2026 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157352289208,68sleep00-21swapper/00
1638399264258,4cyclictest25137-21perf0
161432252186,53sleep20-21swapper/22
159682244206,25sleep30-21swapper/33
1639099243236,5cyclictest25140-21idleruntime-cro2
160062229192,24sleep10-21swapper/11
1639399145139,3cyclictest25115-21munin-run3
2464321400,2sleep00-21swapper/00
1638699129124,3cyclictest25136-21sendmail1
197282640,2sleep01638399cyclictest0
9942540,3sleep30-21swapper/33
70982530,3sleep09-21ksoftirqd/00
35452500,2sleep10-21swapper/11
92822460,1sleep39281-21dpkg3
166102270,4sleep0101rcuc/00
257902260,3sleep01638399cyclictest0
16383992621,3cyclictest31435-21cron0
1639099256,16cyclictest9249-21apt-key2
1639099248,14cyclictest15614-21latency_hist2
326362230,4sleep332639-21pmu-power3
1639099238,13cyclictest18573-21latency_hist2
1639099231,4cyclictest9296-21munin-run2
16390992311,3cyclictest98682sed2
1639099223,17cyclictest603-21latency_hist2
1639099223,17cyclictest11615-21cat2
1639099222,18cyclictest31522-21cat2
1639099222,18cyclictest27168-21latency_hist2
1639099221,18cyclictest28923-21perf2
1638699220,5cyclictest0-21swapper/11
16393992116,3cyclictest10447-21open_files3
16393992116,3cyclictest10447-21open_files3
16393992115,4cyclictest18804-21sed3
16393992115,3cyclictest9781-21aten2_r9power_e3
16393992114,5cyclictest35-21ksoftirqd/33
1639099215,14cyclictest13510-21apt-key2
1639099213,16cyclictest5176-21latency_hist2
1639099212,17cyclictest16578-21latency_hist2
16390992117,2cyclictest0-21swapper/22
16390992115,4cyclictest7069-21sshd2
1639099211,4cyclictest25018-21munin-run2
1639099211,18cyclictest537-21gdbus2
1639099211,17cyclictest32535-21munin-run2
1638699212,16cyclictest22203-21cron1
1638699211,17cyclictest14437-21sh1
16383992116,3cyclictest18079-21sed0
16383992116,3cyclictest15220-21timerwakeupswit0
16383992115,4cyclictest325-21systemd-journal0
16383992115,3cyclictest8011-21grep0
16383992114,5cyclictest6404-21/usr/sbin/munin0
16393992017,2cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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