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2026-05-09 - 02:17
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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 May 08, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14855993327,5cyclictest0-21swapper/011:40:120
1485699300,29cyclictest621-21dbus-daemon07:35:001
1485699300,29cyclictest11102-21awk08:10:011
14855993027,2cyclictest2815-21cron10:10:000
14866992928,0cyclictest0-21swapper/312:34:153
14866992928,0cyclictest0-21swapper/309:45:113
14866992927,1cyclictest0-21swapper/310:10:013
14861992928,1cyclictest14791-21apt-get10:35:112
1486199290,1cyclictest0-21swapper/208:50:102
14856992928,1cyclictest8394-21apt-get11:30:111
14856992927,1cyclictest307-21systemd-journal07:40:011
14856992927,1cyclictest30056-21munin-run08:50:001
14856992927,1cyclictest30056-21munin-run08:50:001
14856992927,1cyclictest0-21swapper/110:50:011
14856992927,1cyclictest0-21swapper/110:45:011
1485699290,28cyclictest1411-21apt-get07:50:101
1485699290,28cyclictest0-21swapper/111:40:011
14855992927,1cyclictest17723-21cron11:50:010
1485599290,28cyclictest0-21swapper/011:25:120
1485599290,0cyclictest0-21swapper/009:20:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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