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2026-05-04 - 10:31
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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 Mon May 04, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25205699107104,0cyclictest426463-21sh00:25:000
2520569910198,0cyclictest415265-21taskset00:01:440
25205699813,59cyclictest1078-21lldpd21:29:160
252063997921,39cyclictest366572-21chrt22:35:187
252056997638,21cyclictest0-21swapper/020:22:200
252056997251,18cyclictest875-21mta-sts-daemon21:09:140
252056997233,19cyclictest0-21swapper/000:06:320
252056997132,39cyclictest358843-21ntpq22:20:180
252056997132,20cyclictest399136-21cut23:35:020
252056997113,39cyclictest353643-21kworker/0:0+ice22:16:280
252056997012,19cyclictest0-21swapper/019:21:180
25205699699,39cyclictest339497-21smartctl21:45:220
252056996931,19cyclictest341234-21diskstats21:50:140
252056996911,39cyclictest319884-21/usr/sbin/munin21:10:220
25205699657,39cyclictest228329-21kworker/0:1+ice19:55:180
252056996324,39cyclictest0-21swapper/019:38:460
25205699613,39cyclictest362-21jbd2/sda2-819:33:460
252056996021,39cyclictest0-21swapper/019:53:540
252056995921,38cyclictest0-21swapper/020:55:060
252056995921,38cyclictest0-21swapper/019:26:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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