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2026-04-22 - 10:17
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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 10 highest latencies:
System rackbslot7.osadl.org (updated Wed Apr 22, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16480217110,27sleep20-21swapper/218:58:032
16668212911,76sleep18637-21kworker/u18:1+ext4-rsv-conversion18:58:351
17920991172,45cyclictest2731-21apt-get19:52:550
17920991172,45cyclictest2731-21apt-get19:52:550
17920991103,42cyclictest7560-21apt-get20:07:530
179209910954,49cyclictest297-21systemd-logind19:07:420
179209910954,49cyclictest297-21systemd-logind19:07:420
17920991095,27cyclictest14672-21/usr/sbin/munin22:33:200
17920991073,36cyclictest27131-21latency_hist23:47:440
179209910643,56cyclictest0-21swapper/021:17:410
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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