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2026-05-11 - 22:47
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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 rackeslot5.osadl.org (updated Mon May 11, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2921299300,29cyclictest16577-21turbostat.cron09:00:003
2920499300,2cyclictest11393-21perf07:40:010
2921299290,28cyclictest12976-21apt-get11:10:123
2921299290,28cyclictest12684-21cron11:10:003
2920899290,28cyclictest0-21swapper/212:10:132
2920699290,28cyclictest5465-21apt-get09:45:111
2920699290,28cyclictest12692-21sh11:10:011
2920699290,1cyclictest16575-21sendmail-msp09:00:001
2920499290,28cyclictest0-21swapper/011:50:120
2920499290,28cyclictest0-21swapper/010:25:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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