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2026-01-10 - 22:33
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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 Sat Jan 10, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1856299320,0cyclictest0-21swapper/211:15:132
1856699310,30cyclictest29561-21cron11:00:013
1856699310,0cyclictest0-21swapper/312:25:133
18562993028,1cyclictest621-21dbus-daemon11:30:012
18562993027,3cyclictest0-21swapper/208:35:112
1855999300,29cyclictest16807-21cron08:15:021
18566992927,1cyclictest0-21swapper/308:40:003
1856699290,28cyclictest0-21swapper/307:35:123
18562992927,1cyclictest12359-21munin-run09:15:002
1856299290,28cyclictest19714-21munin-run09:30:002
1856299290,28cyclictest15590-21munin-run10:30:012
1856299290,28cyclictest0-21swapper/208:10:112
1856299290,28cyclictest0-21swapper/207:15:012
18559992927,1cyclictest0-21swapper/109:50:011
1855999290,28cyclictest6773-21apt-get11:20:111
1855999290,28cyclictest3088-21apt-get07:45:131
18555992927,2cyclictest29586-21sendmail-msp11:00:010
18555992926,3cyclictest0-21swapper/012:25:140
1855599290,28cyclictest21418-21apt-get07:15:120
1855599290,28cyclictest12329-21awk09:14:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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