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2026-08-12 - 14:19
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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 Wed Aug 12, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2518832999414,59cyclictest2689258-21latency_hist00:20:013
2518834997456,18cyclictest0-21swapper/521:45:155
2518832997214,39cyclictest2608489-21sendmail_mailst21:50:213
251883299719,39cyclictest2628128-21sed22:25:213
251883299719,39cyclictest2628128-21sed22:25:203
2518832996723,39cyclictest511ktimers/323:10:273
2518832996445,18cyclictest0-21swapper/319:50:013
251883199636,19cyclictest872-21mta-sts-daemon20:10:182
2518832996222,19cyclictest0-21swapper/322:02:513
2518832996021,38cyclictest2622815-21unixbench_multi22:15:253
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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