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2026-04-09 - 23:31
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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 rackfslot7.osadl.org (updated Thu Apr 09, 2026 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20157129910224,58cyclictest2187762-21fschecks_time12:20:143
2015712999292,0cyclictest413-21systemd-journal10:20:003
2015712999112,59cyclictest2162103-21chrt11:34:243
2015712999012,59cyclictest3862161-21munin-node07:35:103
2015712997921,39cyclictest2087060-21kworker/u32:3+xprtiod09:46:003
201571299780,59cyclictest2172997-21taskset11:54:103
2015712997233,39cyclictest0-21swapper/309:44:063
2015712997031,39cyclictest0-21swapper/311:12:503
2015712997031,39cyclictest0-21swapper/310:23:503
2015712996829,39cyclictest0-21swapper/310:14:343
201571299679,39cyclictest2176270-21/usr/sbin/munin12:00:203
201571299679,39cyclictest2033101-21hddtemp_smartct07:40:163
2015712996425,39cyclictest0-21swapper/310:57:143
2015712996325,19cyclictest2018282-21taskset07:14:363
2015712996223,39cyclictest0-21swapper/308:24:203
2015715996143,0cyclictest0-21swapper/607:50:156
201571299612,39cyclictest2110767-21if_err_eno210:00:163
201571299612,0cyclictest191rcu_preempt07:24:223
201571299601,39cyclictest0-21swapper/311:22:443
2015712995839,19cyclictest511ktimers/307:33:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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