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2026-07-19 - 13:24
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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 Sun Jul 19, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26571889955634,521cyclictest0-21swapper/723:38:1113
26571889955028,521cyclictest0-21swapper/720:07:1113
265719599549548,1cyclictest2802205-21kworker/9:2+i915-unordered22:27:1115
265719599549548,1cyclictest2802205-21kworker/9:2+i915-unordered22:27:1115
265718899548547,1cyclictest2694078-21kworker/7:0+i915-unordered19:49:1113
26572189954011,528cyclictest0-21swapper/1422:17:116
26572189954011,528cyclictest0-21swapper/1422:17:116
26572189952710,513cyclictest0-21swapper/1421:45:116
265721099505503,1cyclictest2726604-21kworker/12:0+i915-unordered20:30:114
265718599500498,2cyclictest2778956-21kworker/6:1+i915-unordered21:45:1112
265721099491490,0cyclictest2867304-21kworker/12:0+i915-unordered23:57:114
265721099474473,1cyclictest0-21swapper/1200:13:114
265722099472472,0cyclictest0-21swapper/1520:40:117
26571819947126,29cyclictest0-21swapper/500:26:0611
265718599468467,1cyclictest2811165-21kworker/6:0+i915-unordered22:17:1112
265718599468467,1cyclictest2811165-21kworker/6:0+i915-unordered22:17:1112
265722099467466,1cyclictest0-21swapper/1500:03:117
265717199467465,2cyclictest0-21swapper/200:03:118
265721899465464,1cyclictest0-21swapper/1420:17:116
265717199464463,1cyclictest0-21swapper/223:30:118
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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