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2026-09-15 - 02:39
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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 rack8slot4.osadl.org (updated Tue Sep 15, 2026 00:44:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35334342234171,18sleep70-21swapper/719:06:447
35334692216186,19sleep40-21swapper/419:07:124
35335852214186,18sleep50-21swapper/519:08:515
35313152214186,18sleep60-21swapper/619:05:146
35334942212184,19sleep20-21swapper/219:07:352
35313392211183,18sleep30-21swapper/319:05:343
35334572208181,18sleep10-21swapper/119:07:021
35335692206176,20sleep00-21swapper/019:08:380
353389599330,32cyclictest3570727-21cron20:15:017
353388099330,32cyclictest0-21swapper/223:30:002
353388099330,32cyclictest0-21swapper/221:36:252
353388099330,32cyclictest0-21swapper/200:16:252
353389099320,4cyclictest3542889-21true19:25:016
3533880993228,3cyclictest0-21swapper/219:35:032
353388099320,31cyclictest0-21swapper/223:56:252
353387899320,31cyclictest1-21systemd21:25:011
3533895993128,2cyclictest3704476-21munin-run00:15:017
353389099310,30cyclictest3699431-21apt-get00:06:266
353388499310,30cyclictest3626513-21basename21:55:024
353388399310,30cyclictest3651527-21cron22:40:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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