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2026-01-09 - 00:56
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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 Thu Jan 08, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20114592224172,18sleep00-21swapper/007:07:490
20114182216185,20sleep70-21swapper/707:07:167
20114742213185,18sleep60-21swapper/607:08:036
20112672212185,17sleep40-21swapper/407:05:044
20113112211175,23sleep30-21swapper/307:05:423
20135532210180,19sleep20-21swapper/207:09:592
20134552210181,18sleep10-21swapper/107:08:371
20113422210182,18sleep50-21swapper/507:06:095
2013786994545,0cyclictest2074680-21systemd-run09:05:014
201378999446,24cyclictest0-21swapper/509:31:125
201379599330,28cyclictest0-21swapper/708:35:017
201377899320,31cyclictest2019979-21latency_hist07:20:011
201378699310,29cyclictest2183324-21sh12:30:004
2013780993130,1cyclictest0-21swapper/211:15:012
2013780993127,3cyclictest700-21rs:main2
201377899310,30cyclictest2069274-21awk08:55:021
2013795993028,1cyclictest369-21systemd-journal10:10:017
2013795993028,1cyclictest2091479-21dpkg-deb09:33:347
2013795993025,4cyclictest0-21swapper/711:50:027
201379599300,29cyclictest2142156-21apt-get11:15:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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