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2026-04-14 - 17:10
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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 Tue Apr 14, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40647399543542,1cyclictest609104-21kworker/7:0+i915-unordered23:37:1013
40647399543542,1cyclictest609104-21kworker/7:0+i915-unordered23:37:1013
40649699519518,1cyclictest620207-21kworker/12:2+i915-unordered23:38:104
40649699519518,1cyclictest620207-21kworker/12:2+i915-unordered23:38:104
406484995020,501cyclictest0-21swapper/1020:08:102
40647999497497,0cyclictest0-21swapper/900:38:1015
406506994932,491cyclictest0-21swapper/1522:57:107
4064799949226,465cyclictest0-21swapper/923:31:1015
40649199481480,0cyclictest519679-21kworker/11:1+i915-unordered21:43:103
4064469947823,454cyclictest0-21swapper/023:38:100
4064469947823,454cyclictest0-21swapper/023:38:100
40645499473471,2cyclictest423343-21kworker/2:1+i915-unordered20:08:108
40649699472471,1cyclictest519723-21kworker/12:1+i915-unordered21:28:104
4064919947022,447cyclictest124-21ksoftirqd/1100:11:103
406458994700,469cyclictest0-21swapper/321:35:109
40647999469469,0cyclictest419321-21kworker/9:2+i915-unordered19:56:1015
4064469946425,438cyclictest0-21swapper/022:43:100
40645899462460,2cyclictest0-21swapper/320:20:109
40649899459458,1cyclictest467455-21kworker/13:0+i915-unordered20:55:105
40649899459458,1cyclictest467455-21kworker/13:0+i915-unordered20:55:105
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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