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2026-08-26 - 16:43
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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 10 highest latencies:
System rackfslot7.osadl.org (updated Wed Aug 26, 2026 12:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3757409991440,1cyclictest0-21swapper/511:10:125
3757408997719,39cyclictest3767600-21sort07:25:224
3757408997436,19cyclictest3888117-21ntpq11:05:194
3757408997335,19cyclictest3780358-21df_inode07:50:144
3757408997214,39cyclictest3826520-21/usr/sbin/munin09:15:164
3757408997214,39cyclictest3757434-21latency_hist07:10:034
3757408997133,19cyclictest0-21swapper/411:35:484
3757408997113,39cyclictest3812598-21kworker/u32:1+events_unbound09:35:174
3757408996730,18cyclictest1-21systemd10:45:024
3757411996564,1cyclictest877-21mta-sts-daemon08:15:157
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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