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2026-04-23 - 03:42
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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 23, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14848993027,2cyclictest307-21systemd-journal22:15:003
1484899300,2cyclictest26419-21sh19:35:013
1484899300,29cyclictest621-21dbus-daemon00:00:013
1484899300,29cyclictest24019-21cron22:55:003
14846993028,1cyclictest5930-21apt-get23:25:122
1484699300,29cyclictest26420-21awk19:35:012
14840993028,1cyclictest621-21dbus-daemon20:40:000
1484099300,29cyclictest646-21polkitd00:40:010
1484099300,29cyclictest2764-21cron22:10:000
1484899290,29cyclictest15068-21apt-get19:10:103
1484899290,1cyclictest19422-21cron19:20:003
14846992927,1cyclictest24028-21apt22:55:002
14846992927,1cyclictest0-21swapper/200:00:012
1484699290,28cyclictest21802-21munin-run19:25:012
14842992928,0cyclictest0-21swapper/121:45:111
14842992927,1cyclictest0-21swapper/122:15:001
1484299290,28cyclictest24016-21cron22:55:001
1484299290,28cyclictest1-21systemd00:00:001
1484299290,28cyclictest0-21swapper/100:15:121
1484299290,1cyclictest649-21gdbus19:20:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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