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2026-04-21 - 01:47
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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 Apr 20, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11405993028,1cyclictest27833-21cron07:45:003
1140599300,29cyclictest9263-21apt-get11:40:133
11404993028,1cyclictest26606-21munin-run10:00:012
1140499300,1cyclictest12249-21turbostat.cron09:30:002
11402993028,1cyclictest0-21swapper/007:30:010
1140299300,2cyclictest1436-21cron10:15:010
1140599290,28cyclictest0-21swapper/311:10:133
1140599290,28cyclictest0-21swapper/310:15:123
11404992928,1cyclictest621-21dbus-daemon07:45:012
11404992927,1cyclictest621-21dbus-daemon12:35:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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