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2025-07-06 - 00:26
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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 rack0slot5.osadl.org (updated Sat Jul 05, 2025 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
213944099695694,1cyclictest0-21swapper/319:33:389
21394829956916,552cyclictest0-21swapper/1322:27:155
21394369956123,537cyclictest0-21swapper/221:45:158
21394369953513,521cyclictest0-21swapper/220:28:158
213946999521519,2cyclictest2267484-21kworker/10:2+i915-unordered21:45:152
213944799518517,1cyclictest2301059-21kworker/5:0+i915-unordered22:27:1511
213943699502501,1cyclictest2345235-21kworker/2:0+i915-unordered23:17:158
213946999494493,1cyclictest2193566-21kworker/10:0+i915-unordered20:28:152
21394749948724,462cyclictest0-21swapper/1120:25:153
21394749948421,463cyclictest0-21swapper/1121:45:153
21394449947625,30cyclictest0-21swapper/422:29:5810
21394749947439,428cyclictest2349338-21kworker/11:2+i915-unordered23:47:153
2139440994746,59cyclictest0-21swapper/319:22:159
213944799471471,0cyclictest0-21swapper/519:50:1511
2139474994708,461cyclictest0-21swapper/1122:27:153
213947499469468,1cyclictest2255183-21kworker/11:1+i915-unordered21:51:153
213946999469468,1cyclictest0-21swapper/1019:25:152
21394509946719,29cyclictest0-21swapper/622:06:1512
21394319946618,30cyclictest0-21swapper/123:13:141
213947999463462,1cyclictest0-21swapper/1222:42:154
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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