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2025-10-17 - 10:53
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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 Fri Oct 17, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1267852990,91pltrace0-21swapper/519:05:185
1546752970,89pltrace0-21swapper/319:10:013
1267852960,87pltrace0-21swapper/119:05:491
1546752920,56pltrace0-21swapper/719:09:437
2548952900,2pltrace0-21swapper/019:28:170
1267852880,81pltrace0-21swapper/619:05:146
1539127444,11sleep00-21swapper/019:07:310
1559126551,10sleep20-21swapper/219:09:572
1525425844,10sleep40-21swapper/419:05:344
1577199460,3cyclictest9105-21date22:05:013
1578599450,1cyclictest0-21swapper/622:05:016
1578999346,3cyclictest26389-21kworker/u16:2+rpciod@
rpc_async_schedule
21:44:067
1430452280,0pltrace0-21swapper/722:15:177
1373852270,2pltrace0-21swapper/721:05:177
1093052240,0pltrace0-21swapper/721:00:227
1093052240,0pltrace0-21swapper/721:00:227
424852210,7pltrace0-21swapper/719:50:307
2827852200,13pltrace29901-21kernelversion19:35:185
15789992011,8cyclictest0-21swapper/700:20:007
533652190,4pltrace0-21swapper/723:57:377
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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