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2025-11-23 - 02:42
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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 Sat Nov 22, 2025 12:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
774348995535,19cyclictest1089-21snmpd12:38:233
774348995519,35cyclictest0-21swapper/312:08:583
774348995519,35cyclictest0-21swapper/311:04:223
774348995419,35cyclictest0-21swapper/308:22:073
774348995419,34cyclictest0-21swapper/311:33:223
774348995419,15cyclictest0-21swapper/310:01:543
774348995419,15cyclictest0-21swapper/308:48:023
774348995419,15cyclictest0-21swapper/308:19:563
774348995419,15cyclictest0-21swapper/307:56:393
774348995419,15cyclictest0-21swapper/307:37:473
774348995415,39cyclictest0-21swapper/309:30:113
774348995415,19cyclictest0-21swapper/311:55:163
774348995414,39cyclictest0-21swapper/311:37:383
774348995414,39cyclictest0-21swapper/309:07:223
774348995414,39cyclictest0-21swapper/308:37:593
774348995414,39cyclictest0-21swapper/307:26:133
774348995413,39cyclictest950995-21apt-key12:20:003
774348995413,39cyclictest0-21swapper/308:40:223
774348995334,19cyclictest0-21swapper/310:13:143
774348995334,19cyclictest0-21swapper/308:13:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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