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2026-04-19 - 20:52
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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 20 highest latencies:
System rack8slot4.osadl.org (updated Sun Apr 19, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12580112226170,18sleep10-21swapper/107:08:571
12559322221168,18sleep30-21swapper/307:06:593
12559432215186,18sleep20-21swapper/207:07:062
12559272214184,19sleep70-21swapper/707:06:557
12559452209177,21sleep40-21swapper/407:07:094
12559832207174,21sleep60-21swapper/607:07:436
12559772206176,19sleep00-21swapper/007:07:370
12558492204173,21sleep50-21swapper/507:05:495
1258329993916,23cyclictest0-21swapper/707:23:427
1258321993429,4cyclictest1424823-21awk12:15:014
125832999320,31cyclictest369-21systemd-journal08:45:027
1258329993129,1cyclictest1286565-21updatedb.plocat08:01:077
125831099310,30cyclictest681-21dbus-daemon09:50:010
125832999300,1cyclictest1267854-21apt-get07:27:577
125832999300,1cyclictest0-21swapper/710:20:017
1258327993028,1cyclictest1387466-21apt-get11:07:576
125832799300,29cyclictest1329444-21latency_hist09:20:026
125832799300,29cyclictest0-21swapper/609:35:026
125832799300,29cyclictest0-21swapper/607:35:016
1258323993026,3cyclictest1315721-21turbostat.cron08:55:015
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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