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2026-04-23 - 14:52
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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 Apr 23, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2849499953924,514cyclictest0-21swapper/1120:35:543
28493099504503,1cyclictest515056-21kworker/7:2+i915-unordered23:54:5313
28495399497496,1cyclictest546870-21kworker/12:1+i915-unordered00:30:534
28492299496495,1cyclictest446555-21kworker/5:2+i915-unordered22:31:5411
28494999489487,2cyclictest462464-21kworker/11:2+i915-unordered22:55:533
28493099483482,1cyclictest481358-21kworker/7:1+i915-unordered23:35:5313
28496499476446,30cyclictest0-21swapper/1523:35:537
28491999475473,2cyclictest0-21swapper/400:30:5310
2849169947527,30cyclictest0-21swapper/320:27:379
2849169947525,448cyclictest0-21swapper/320:45:369
2849499947119,59cyclictest0-21swapper/1120:16:543
28496499469467,2cyclictest0-21swapper/1523:54:537
2849119946924,29cyclictest0-21swapper/220:12:158
2849119946816,29cyclictest0-21swapper/222:24:158
2849169946616,29cyclictest0-21swapper/319:44:169
28491999465464,1cyclictest366102-21kworker/4:1+i915-unordered20:51:5410
28496499462462,0cyclictest494647-21kworker/15:3+i915-unordered23:26:537
28495899457427,30cyclictest0-21swapper/1322:31:545
2849119945711,29cyclictest0-21swapper/221:44:398
28494199452450,2cyclictest337753-21kworker/10:1+i915-unordered20:11:542
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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