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2026-03-13 - 06:21
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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 Fri Mar 13, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24982993331,1cyclictest880-21awk21:45:013
2498299311,29cyclictest4155-21awk19:35:013
2497399310,30cyclictest31244-21cron22:50:001
2497899300,29cyclictest19819-21cron23:35:012
24982992927,1cyclictest30946-21cron21:40:003
24982992927,1cyclictest0-21swapper/320:30:023
2498299290,28cyclictest0-21swapper/321:30:123
24978992927,1cyclictest621-21dbus-daemon19:40:012
2497899290,28cyclictest0-21swapper/222:50:102
2497399290,28cyclictest15472-21apt-get23:25:131
2496999290,28cyclictest0-21swapper/023:35:100
2496999290,1cyclictest11137-21awk19:50:020
24982992827,0cyclictest12857-21apt-get22:10:103
2498299280,28cyclictest26022-21perf21:29:593
2498299280,28cyclictest0-21swapper/322:40:123
2498299280,27cyclictest0-21swapper/321:50:123
2498299280,27cyclictest0-21swapper/320:15:133
2498299280,0cyclictest0-21swapper/323:35:113
24978992828,0cyclictest0-21swapper/220:20:142
2497899280,1cyclictest0-21swapper/219:45:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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