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2026-04-23 - 05:47
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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 Thu Apr 23, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
375734899900,2cyclictest0-21swapper/119:45:161
375735099634,39cyclictest3768198-21sed19:30:013
3757350996022,38cyclictest0-21swapper/323:06:093
3757350995820,19cyclictest3936078-21cat00:35:133
3757350995738,19cyclictest511ktimers/322:06:573
3757350995719,19cyclictest3928578-21irqstats00:20:173
3757350995715,39cyclictest3932219-21unixbench-2d00:25:233
3757350995618,19cyclictest3844166-21grep21:45:213
375735099560,55cyclictest0-21swapper/320:43:573
3757350995536,19cyclictest511ktimers/323:21:333
3757350995517,19cyclictest3879424-21collect222:50:193
3757350995516,20cyclictest3798590-21/usr/sbin/munin20:25:173
3757350995515,39cyclictest0-21swapper/321:39:213
3757350995515,39cyclictest0-21swapper/319:18:213
3757350995514,4cyclictest0-21swapper/319:32:113
3757350995514,40cyclictest3834475-21grep21:30:133
3757350995514,19cyclictest3758583-21irqstats19:10:153
3757350995513,40cyclictest3763147-21kworker/u32:4+flush-8:020:05:013
3757350995513,39cyclictest3832813-21ntpq21:25:193
3757350995419,35cyclictest0-21swapper/319:58:573
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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