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2026-05-08 - 10:15
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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 Fri May 08, 2026 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
87643299835,59cyclictest942552-21sshd21:06:053
87643099770,1cyclictest0-21swapper/119:30:121
876432997234,19cyclictest925372-21ntpq20:35:183
876432997214,39cyclictest905956-21ps20:00:203
876432997214,19cyclictest0-21swapper/319:40:193
876432997011,58cyclictest1028541-21systemd-run23:45:023
876432996830,38cyclictest0-21swapper/322:35:133
87643299679,39cyclictest1025247-21taskset23:36:323
87643199612,19cyclictest0-21swapper/219:50:162
87643299602,58cyclictest1036977-21kworker/u32:5+events_unbound00:10:143
876432996016,40cyclictest1054719-21/usr/sbin/munin00:30:173
876432995921,19cyclictest904096-21cron19:59:593
87643299591,39cyclictest884982-21apt-get19:25:123
876432995719,38cyclictest0-21swapper/321:30:163
876432995718,39cyclictest1056864-21diskstats00:35:163
876431995636,19cyclictest0-21swapper/221:00:162
876431995636,19cyclictest0-21swapper/221:00:152
876432995517,19cyclictest972406-21ntp_states22:00:193
876432995516,39cyclictest882070-21/usr/sbin/munin19:20:023
87643099550,54cyclictest0-21swapper/121:05:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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