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2025-11-07 - 21:54
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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 rack0slot7.osadl.org (updated Fri Nov 07, 2025 00:46:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
194883399386385,1cyclictest27750irq/127-ahci[0000:00:17.0]23:11:3915
194880499291282,8cyclictest28682-21Renderer23:45:200
194881199289282,5cyclictest28682-21Renderer00:31:098
194883199288282,5cyclictest28682-21Renderer23:18:5914
194880499288281,6cyclictest9704-21Xorg23:38:110
194880499288281,6cyclictest9704-21Xorg23:38:110
194883899287279,7cyclictest10230-21gnome-shell23:42:593
1948838992870,286cyclictest0-21swapper/1123:06:593
194882699287282,4cyclictest28682-21Renderer00:37:1813
194882699287282,4cyclictest28682-21Renderer00:37:1813
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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