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2026-07-16 - 12:52
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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 Jul 16, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2746005995776,27cyclictest0-21swapper/1523:10:167
274596399517515,2cyclictest2827083-21kworker/5:5+i915-unordered21:35:1711
274599199506504,2cyclictest2811210-21kworker/11:0+i915-unordered20:35:173
27459969947820,58cyclictest0-21swapper/1321:58:595
274599399473472,0cyclictest2774633-21kworker/12:1+i915-unordered19:37:174
274598699469467,2cyclictest2927519-21kworker/10:2+i915-unordered23:22:162
2745971994628,453cyclictest0-21swapper/719:54:1713
274599199457455,2cyclictest2947799-21kworker/11:1+i915-unordered23:32:163
274597499453452,1cyclictest69750irq/159-i91522:18:1714
274596899452394,28cyclictest0-21swapper/623:45:1612
274596899452394,28cyclictest0-21swapper/623:45:1612
274594999452450,2cyclictest2851092-21kworker/1:2+i915-unordered22:03:171
27459969945122,30cyclictest0-21swapper/1320:07:005
27459969944821,29cyclictest0-21swapper/1323:25:395
27459969944820,29cyclictest0-21swapper/1300:34:395
27459969944820,28cyclictest0-21swapper/1321:45:405
27460059944517,30cyclictest0-21swapper/1523:59:397
27460059944516,30cyclictest0-21swapper/1519:13:027
27459539944526,418cyclictest0-21swapper/223:26:398
27459539944522,30cyclictest43-21ksoftirqd/220:58:178
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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