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2026-07-09 - 12:04
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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 Thu Jul 09, 2026 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3231212811,88sleep23238-21modprobe18:57:252
225521259,87sleep00-21swapper/018:52:550
33979910672,13cyclictest58-21kcompactd020:57:460
33979910672,13cyclictest58-21kcompactd020:57:460
34049910349,47cyclictest0-21swapper/219:37:462
3404991033,41cyclictest15045-21cat22:52:502
239721019,62sleep12430-21ntpq18:53:001
340499962,43cyclictest11464-21ntp_states20:57:572
340499962,43cyclictest11464-21ntp_states20:57:572
340499959,64cyclictest11981-21apt-get23:42:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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