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2026-03-10 - 00:07
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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 Mon Mar 09, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
165389913462,64cyclictest19249-21latency_hist10:45:390
165389911759,52cyclictest277-21dbus-daemon08:35:370
165389911429,26cyclictest0-21swapper/009:10:380
165389911139,9cyclictest0-21swapper/012:25:380
165389911134,20cyclictest25050-21modprobe07:30:350
16267211014,69sleep216278-21munin-run07:05:362
16538991083,36cyclictest5763-21/usr/sbin/munin08:11:120
16538991073,50cyclictest352-21runrttasks10:53:390
165389910714,27cyclictest30902-21taskset07:46:090
165389910641,14cyclictest4851-21mailstats08:06:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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