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2026-06-04 - 02:32
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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 Thu Jun 04, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
394926799752334,417cyclictest0-21swapper/300:20:369
39493189954212,27cyclictest0-21swapper/1520:00:367
39493109952637,29cyclictest0-21swapper/1321:13:365
39493159951424,489cyclictest0-21swapper/1423:14:366
394929999514511,2cyclictest0-21swapper/1022:10:362
3949310995139,44cyclictest0-21swapper/1323:56:365
394926499511510,1cyclictest4040000-21kworker/2:1+i915-unordered22:10:368
394929399503501,2cyclictest3980244-21kworker/9:0+i915-unordered20:06:3615
39492599949112,58cyclictest0-21swapper/123:22:571
39492939948814,59cyclictest0-21swapper/920:41:3615
39492769948219,462cyclictest0-21swapper/519:44:3611
394926499480479,1cyclictest4010578-21kworker/2:0+i915-unordered21:06:368
39493109947918,459cyclictest0-21swapper/1323:14:365
39493109947715,0cyclictest0-21swapper/1322:15:365
39493109947625,29cyclictest0-21swapper/1320:43:225
39493109947527,29cyclictest0-21swapper/1321:32:185
39492599947326,29cyclictest0-21swapper/122:53:571
394928699472415,28cyclictest0-21swapper/819:11:2114
39493109947126,29cyclictest191rcu_preempt23:32:315
39492729947021,29cyclictest0-21swapper/421:35:1910
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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