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2026-05-01 - 22:32
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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 Fri May 01, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
665221630,21sleep20-21swapper/206:59:532
6327215230,100sleep16416-21grep06:57:501
69629911137,21cyclictest4578-21modprobe12:22:030
3150621100,6sleep20-21swapper/210:24:062
69629910861,22cyclictest0-21swapper/010:32:190
69629910579,19cyclictest6976-21latency_hist07:02:080
69629910539,13cyclictest31695-21sh09:31:130
69629910341,12cyclictest24425-21latency10:12:290
69629910340,12cyclictest15011-21sendmail10:52:030
69629910340,12cyclictest15011-21sendmail10:52:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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