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2024-10-07 - 00:58
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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 Sun Oct 06, 2024 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2809993027,3cyclictest24135-21perf07:55:013
280999300,2cyclictest29086-21perf09:15:003
280699300,29cyclictest0-21swapper/207:25:012
280699300,29cyclictest0-21swapper/207:25:012
280499300,29cyclictest8602-21sendmail-msp09:40:001
2799993028,2cyclictest609-21dbus-daemon09:05:010
280999290,28cyclictest0-21swapper/308:45:113
280999290,1cyclictest29941-21apt-get10:25:133
280999290,1cyclictest22025-21sendmail-msp09:00:003
2806992927,2cyclictest611-21avahi-daemon11:00:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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