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2026-04-25 - 08:31
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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 10 highest latencies:
System rackbslot7.osadl.org (updated Sat Apr 25, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
71749912156,58cyclictest277-21dbus-daemon23:57:300
7174991213,34cyclictest5749-21/usr/sbin/munin00:23:050
7174991113,50cyclictest3280-21ssh22:30:490
7174991113,50cyclictest3280-21ssh22:30:490
7174991113,48cyclictest1944-21/usr/sbin/munin23:22:520
7174991113,48cyclictest1944-21/usr/sbin/munin23:22:520
7174991062,41cyclictest12928-21latency_hist22:47:310
71749910451,12cyclictest19676-21snmpd23:13:060
7174991024,29cyclictest4855-21ntp_states22:33:000
71809910178,15cyclictest2374-21systemd-journal19:27:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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