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2026-05-21 - 10:29
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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 May 21, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2295699343,18cyclictest0-21swapper/219:50:462
2295699332,18cyclictest0-21swapper/223:57:082
22958993028,1cyclictest621-21dbus-daemon00:05:013
2295899300,29cyclictest32493-21cron19:30:013
2295699300,29cyclictest24803-21sendmail-msp22:40:002
22952993028,1cyclictest7929-21sendmail-msp00:20:011
22952993028,1cyclictest18939-21cron23:35:011
2295299300,29cyclictest307-21systemd-journal19:15:021
2295299300,29cyclictest26057-21cron20:25:001
22947993028,1cyclictest307-21systemd-journal00:05:000
2294799300,29cyclictest32487-21cron19:30:000
22958992927,1cyclictest12058-21apt-get19:55:133
2295899290,1cyclictest21104-21munin-run20:15:013
22956992927,1cyclictest271rcuc/219:20:012
22956992927,1cyclictest17541-21perf22:25:022
2295299290,28cyclictest3772-21apt-get21:55:101
2294799290,28cyclictest0-21swapper/023:00:120
22956992828,0cyclictest0-21swapper/223:12:102
22956992826,1cyclictest14666-21munin-run21:10:002
22956992826,1cyclictest11695-21perf23:20:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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