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2026-09-03 - 01:33
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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 Sep 03, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2995383995660,564cyclictest0-21swapper/1220:57:444
2995359995556,547cyclictest0-21swapper/623:53:4412
299538399550549,1cyclictest3193000-21kworker/12:0+i915-unordered23:22:444
299538399550549,1cyclictest3193000-21kworker/12:0+i915-unordered23:22:444
299539299511510,1cyclictest3056481-21kworker/14:2+i915-unordered20:41:446
299536399504503,1cyclictest3076303-21kworker/7:0+i915-unordered20:52:4413
299536399503501,2cyclictest3136749-21kworker/7:1+i915-unordered21:58:4413
29953789949416,475cyclictest0-21swapper/1123:11:443
29953549949412,481cyclictest0-21swapper/520:28:4411
29953549949412,481cyclictest0-21swapper/520:28:4411
299535199482481,1cyclictest3088418-21kworker/4:1+i915-unordered20:57:4410
299535199475475,0cyclictest3008054-21kworker/4:0+i915-unordered19:38:4410
29953599947415,458cyclictest0-21swapper/623:45:4412
299536399473473,0cyclictest0-21swapper/723:42:4413
29953969946920,30cyclictest0-21swapper/1500:05:057
299535199468466,2cyclictest0-21swapper/420:30:4410
299535199468466,2cyclictest0-21swapper/420:30:4410
2995340994670,3cyclictest0-21swapper/123:45:551
299534899466465,1cyclictest69750irq/159-i91520:30:449
299534899466465,1cyclictest69750irq/159-i91520:30:449
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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