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2026-05-18 - 19:14
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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 May 18, 2026 12:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3083431991000,99cyclictest0-21swapper/507:45:125
3083429997617,39cyclictest3093248-21ntp_states07:25:203
3083429997616,59cyclictest3130637-21latency_hist08:35:023
3083429997517,39cyclictest3100196-21apt-get07:40:123
3083429997515,39cyclictest1587419-21kworker/u32:0+flush-8:008:20:083
3083429997335,19cyclictest3159517-21ntpq09:25:173
3083429997232,39cyclictest0-21swapper/308:49:443
3083429997030,39cyclictest0-21swapper/308:08:233
3083429997010,60cyclictest3249964-21lpstat12:10:173
3083429996930,19cyclictest3168603-21taskset09:42:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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