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2026-06-28 - 05:32
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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 rack3slot6.osadl.org (updated Sun Jun 28, 2026 00:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2651621160,6chrt25603-21/usr/sbin/munin22:45:351
2651621160,6chrt25603-21/usr/sbin/munin22:45:351
13254991026,65cyclictest0-21swapper/100:25:341
12709210017,38sleep00-21swapper/019:06:180
1325499976,81cyclictest0-21swapper/123:45:131
13247999613,76cyclictest0-21swapper/000:25:250
1268029517,32sleep10-21swapper/119:05:581
13247999015,62cyclictest0-21swapper/020:45:130
13247999014,59cyclictest0-21swapper/023:05:130
13247999014,59cyclictest0-21swapper/023:05:130
13247998814,59cyclictest0-21swapper/021:30:100
13254998725,33cyclictest0-21swapper/123:00:311
13247998728,53cyclictest457-21dbus-daemon22:05:000
13247998713,65cyclictest0-21swapper/019:40:140
13247998617,60cyclictest0-21swapper/023:30:230
13247998615,60cyclictest0-21swapper/022:35:130
13247998615,60cyclictest0-21swapper/020:15:130
13247998615,58cyclictest0-21swapper/019:10:140
13247998615,57cyclictest0-21swapper/022:55:130
1325499858,51cyclictest0-21swapper/119:17:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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