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2026-01-07 - 17:50
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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 Wed Jan 07, 2026 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
867899300,29cyclictest649-21gdbus07:40:000
8681992927,1cyclictest0-21swapper/310:20:013
868199290,28cyclictest13705-21apt-get09:35:123
868199290,28cyclictest0-21swapper/308:40:133
868199290,28cyclictest0-21swapper/307:25:013
868199290,1cyclictest20968-21perf07:35:003
868099290,28cyclictest0-21swapper/211:35:112
868099290,28cyclictest0-21swapper/211:25:132
867999290,28cyclictest32370-21apt-get10:15:111
867999290,28cyclictest0-21swapper/111:10:141
867999290,1cyclictest22182-21apt-get08:45:101
8681992828,0cyclictest0-21swapper/311:30:123
8681992828,0cyclictest0-21swapper/307:10:143
868199280,0cyclictest0-21swapper/308:35:123
8680992828,0cyclictest11677-21apt-get10:40:122
8680992827,1cyclictest24505-21apt-get08:50:112
868099280,28cyclictest0-21swapper/208:45:092
868099280,27cyclictest15130-21apt-get11:55:132
868099280,27cyclictest15130-21apt-get11:55:132
868099280,27cyclictest0-21swapper/210:55:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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