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2026-04-09 - 10:39
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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 rackeslot5.osadl.org (updated Thu Apr 09, 2026 00:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
574699479,0cyclictest0-21swapper/123:35:211
574399310,30cyclictest14038-40ogrotate00:00:010
5753992927,1cyclictest15375-21munin-run19:30:013
575399290,28cyclictest18181-21perf23:00:003
575399290,28cyclictest15835-21cron22:55:013
574999290,28cyclictest22646-21idleruntime-cro19:45:012
574999290,28cyclictest18190-21munin-run23:00:002
574999290,1cyclictest0-21swapper/222:55:012
5746992927,1cyclictest1847-21munin-run22:25:001
574699290,28cyclictest2420-21apt-get21:20:021
574699290,28cyclictest20529-21munin-run23:05:011
574699290,1cyclictest15888-21sendmail-msp20:40:001
5743992927,1cyclictest24617-21awk22:05:020
574399290,28cyclictest13027-21dump-pmu-power19:25:010
574399290,28cyclictest0-21swapper/019:55:120
5753992828,0cyclictest6817-21apt-get20:20:133
575399280,0cyclictest2999-21apt-get21:20:123
575399280,0cyclictest0-21swapper/321:55:123
575399280,0cyclictest0-21swapper/321:05:113
5749992826,1cyclictest0-21swapper/221:35:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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