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2026-09-01 - 01:57
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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 Mon Aug 31, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
794937999052,38cyclictest171ktimers/012:25:160
794939997945,34cyclictest0-21swapper/211:25:002
794941997758,0cyclictest0-21swapper/408:45:264
794941997436,19cyclictest919811-21/usr/sbin/munin10:55:184
794941997333,39cyclictest0-21swapper/408:51:004
794941997233,39cyclictest0-21swapper/408:05:394
794941997214,39cyclictest799496-21python307:15:244
794939997253,19cyclictest411rcuc/208:00:152
794941997133,38cyclictest0-21swapper/411:27:284
794941997112,59cyclictest0-21swapper/410:30:594
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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