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2026-04-29 - 00:30
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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 rackeslot3.osadl.org (updated Tue Apr 28, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2937238997153,16cyclictest2940657-21kworker/1:107:20:161
2937238997138,32cyclictest3002904-21kworker/1:009:55:121
293723899630,62cyclictest0-21swapper/108:18:581
2937238996260,1cyclictest0-21swapper/110:41:521
2937238996144,16cyclictest3000422-1kworker/1:0H12:20:191
2937238996144,15cyclictest43868-1kworker/1:1H09:00:141
2937238996142,18cyclictest3117760-21kworker/1:112:04:551
2937238996133,27cyclictest3087464-21kworker/1:111:35:161
2937238996041,17cyclictest43868-1kworker/1:1H07:13:461
2937238995944,14cyclictest3103019-21kworker/1:211:45:141
2937238995944,14cyclictest3082917-21kworker/1:211:24:551
2937238995944,14cyclictest3076446-21kworker/1:011:15:001
2937238995944,14cyclictest3076446-21kworker/1:011:14:591
2937238995943,15cyclictest3082917-21kworker/1:211:25:011
2937238995843,14cyclictest3082917-21kworker/1:211:30:011
2937238995843,14cyclictest3058479-21kworker/1:311:00:061
2937238995843,14cyclictest3012072-21kworker/1:210:00:151
2937238995843,14cyclictest3002904-21kworker/1:009:54:551
2937238995843,14cyclictest2978253-21kworker/1:009:24:591
2937238995841,16cyclictest2970821-21kworker/1:008:55:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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