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2026-05-31 - 08:09
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Sun May 31, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
362637021030,3sleep30-21swapper/300:04:523
34268712900,2sleep20-21swapper/221:50:032
3213847992421,2cyclictest1290-21dbus-daemon23:55:020
3213848992316,3cyclictest3659196-21kthreadcore00:24:531
3213847992315,3cyclictest3291803-21/usr/sbin/munin20:14:460
3213847992311,6cyclictest0-21swapper/023:25:000
3213849992217,3cyclictest3653182-21taskset00:20:022
3213847992220,1cyclictest3501858-21apt-key22:40:000
3213847992215,6cyclictest2840498-21systemd-journal21:10:010
3213847992214,7cyclictest3647671-21cstates00:19:450
3213847992214,7cyclictest0-21swapper/023:20:000
35751772210,2sleep20-21swapper/223:29:512
33350832210,2sleep30-21swapper/320:44:583
3213849992118,1cyclictest0-21swapper/220:40:002
3213848992118,2cyclictest3419550-21kworker/u16:3-ext4-rsv-conversion22:20:011
3213848992118,2cyclictest0-21swapper/122:30:001
3213848992116,1cyclictest134050irq/121-eno122:39:461
3213849992017,1cyclictest0-21swapper/222:40:022
3213849992017,1cyclictest0-21swapper/222:00:002
3213848992014,2cyclictest134050irq/121-eno121:17:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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