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2026-07-14 - 10:11
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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 rackfslot7.osadl.org (updated Tue Jul 14, 2026 00:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
225492999215,58cyclictest345233-21cpu22:45:124
225492998911,59cyclictest270562-21apt-get20:30:124
22549299889,60cyclictest233055-21ntpq19:20:204
225492998786,1cyclictest245033-21munin-run19:44:594
225492998264,18cyclictest382085-21ntp_states23:50:204
225492997718,39cyclictest301545-21telnet21:25:144
225492997435,38cyclictest871-21mta-sts-daemon21:15:224
225492997315,39cyclictest313564-21ld21:45:204
225492997233,39cyclictest0-21swapper/400:00:284
225492997214,39cyclictest379497-21sendmail_mailqu23:45:224
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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