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2026-04-15 - 21:30
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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 rack0slot5.osadl.org (updated Wed Apr 15, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5042669950336,466cyclictest0-21swapper/1223:06:084
50426699483482,0cyclictest750486-21kworker/12:2+i915-unordered00:30:084
50424599463462,1cyclictest549086-21kworker/7:0+i915-unordered20:03:0813
50423299452452,0cyclictest678187-21kworker/4:1+i915-unordered23:06:0810
50423299451448,3cyclictest0-21swapper/420:00:0810
50426699450449,1cyclictest69750irq/159-i91521:38:084
50427099449446,2cyclictest475521-21kworker/u64:9+events_unbound20:26:315
50424099447444,2cyclictest525246-21kworker/6:1+i915-unordered20:00:0812
5042329944725,29cyclictest0-21swapper/423:22:0810
5042509944625,420cyclictest0-21swapper/922:59:5215
5042219944527,28cyclictest0-21swapper/121:21:081
5042219944523,30cyclictest0-21swapper/120:28:081
5042669944412,431cyclictest0-21swapper/1222:04:314
5042789944318,30cyclictest0-21swapper/1522:06:327
5042739944120,29cyclictest0-21swapper/1423:59:526
5042329944120,30cyclictest0-21swapper/422:18:0810
5042329944120,30cyclictest0-21swapper/422:18:0810
5042739944015,29cyclictest0-21swapper/1423:48:316
50426399439437,1cyclictest503841-21kworker/11:0+i915-unordered00:36:083
5042789943819,30cyclictest0-21swapper/1521:10:307
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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