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2026-08-01 - 10:09
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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 20 highest latencies:
System rack4slot6.osadl.org (updated Sat Aug 01, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16170521310,123pltrace0-21swapper/119:05:251
16170521250,116pltrace0-21swapper/619:05:266
16170521210,117pltrace0-21swapper/719:05:177
16170521180,115pltrace0-21swapper/219:05:182
16170521130,109pltrace0-21swapper/519:05:205
16170521110,94pltrace0-21swapper/319:05:173
1572821040,0sleep00-21swapper/021:34:300
2979452930,0pltrace0-21swapper/422:49:384
295242870,0sleep60-21swapper/600:23:436
976852710,0pltrace0-21swapper/719:49:367
1932252640,7pltrace78-21ksoftirqd/722:40:527
1816526240,17sleep40-21swapper/419:05:244
1892526046,10sleep00-21swapper/019:09:290
968552570,8pltrace0-21swapper/722:04:247
968552570,8pltrace0-21swapper/722:04:247
1965552560,0pltrace0-21swapper/700:18:387
2269552530,6pltrace78-21ksoftirqd/723:46:117
1918299471,45cyclictest0-21swapper/700:28:417
355852440,0pltrace0-21swapper/722:27:527
2632852440,10pltrace78-21ksoftirqd/721:46:237
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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