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2025-11-05 - 01:20
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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 Wed Nov 05, 2025 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9997479955520,534cyclictest0-21swapper/1320:37:195
99971799547546,1cyclictest1086634-21kworker/6:0+i915-unordered21:39:1912
999729995391,536cyclictest0-21swapper/900:22:1815
999747995309,520cyclictest0-21swapper/1320:34:195
9997359953010,519cyclictest0-21swapper/1021:27:192
9997479952223,499cyclictest0-21swapper/1321:36:195
9997569951627,488cyclictest0-21swapper/1522:01:197
9997399951524,29cyclictest0-21swapper/1123:23:183
9997399951511,504cyclictest124-21ksoftirqd/1121:27:193
99973599515515,0cyclictest0-21swapper/1023:19:182
99971499515513,1cyclictest0-21swapper/520:51:1911
9997359951413,500cyclictest0-21swapper/1021:56:192
99975699513512,1cyclictest1100111-21kworker/15:0+i915-unordered23:38:187
99973599512510,2cyclictest1157540-21kworker/10:1+i915-unordered22:53:192
99971499501500,1cyclictest1024926-21kworker/5:1+i915-unordered19:41:1911
9997399949923,476cyclictest0-21swapper/1122:36:193
99971499497496,1cyclictest1053931-21kworker/5:1+i915-unordered20:37:1911
9997399949537,458cyclictest0-21swapper/1122:01:193
9997399949416,477cyclictest0-21swapper/1120:11:193
999739994895,483cyclictest124-21ksoftirqd/1122:56:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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