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2026-04-15 - 01:35
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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 Tue Apr 14, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
855199349,25cyclictest0-21swapper/210:23:342
854799332,18cyclictest65050irq/126-eno111:05:110
855199327,25cyclictest0-21swapper/211:53:072
855199327,25cyclictest0-21swapper/207:13:152
855199320,7cyclictest0-21swapper/207:24:272
854799320,0cyclictest0-21swapper/009:55:130
854999310,30cyclictest13032-21cron11:55:001
8547993128,2cyclictest307-21systemd-journal07:20:010
8551993028,1cyclictest7606-21sh09:25:012
855199300,2cyclictest11720-21cron08:24:592
854799300,29cyclictest15415-21apt-get10:50:110
8552992928,0cyclictest0-21swapper/310:20:113
8552992927,1cyclictest0-21swapper/307:45:113
855299290,28cyclictest0-21swapper/311:20:143
855299290,1cyclictest621-21dbus-daemon11:40:013
8551992927,1cyclictest23223-21munin-run07:40:002
854999290,28cyclictest0-21swapper/110:15:121
854999290,28cyclictest0-21swapper/108:05:121
854799290,28cyclictest12551-21apt-get09:35:140
854799290,28cyclictest0-21swapper/009:10:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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