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2026-07-30 - 18:05
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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 10 highest latencies:
System rackeslot6.osadl.org (updated Thu Jul 30, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
302370499180166,11cyclictest1213033-21systemd-journal09:31:060
302370699176165,8cyclictest1213033-21systemd-journal09:24:061
302370499143136,5cyclictest3041376-21kworker/u8:0+flush-179:008:59:550
302370699135125,7cyclictest3076466-21latency_hist09:50:011
302370499126116,8cyclictest1213033-21systemd-journal11:40:000
302370699125111,10cyclictest3122899-21latency_hist12:15:021
302370699125111,10cyclictest3122899-21latency_hist12:15:011
302370499124114,7cyclictest3118128-21latency_hist12:00:010
302370699122111,9cyclictest3102458-21apt-get11:10:101
302370499119112,5cyclictest3069819-21kworker/u8:0+flush-179:009:45:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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