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2026-04-05 - 20:06
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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 Apr 05, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14354899706307,397cyclictest0-21swapper/1322:59:095
1435299953139,491cyclictest0-21swapper/920:47:2715
1435159950911,497cyclictest0-21swapper/520:35:2711
14349999494493,1cyclictest0-21swapper/123:42:261
14354499486486,0cyclictest325581-21kworker/12:2+i915-unordered22:57:264
14351999482482,0cyclictest192375-21kworker/6:2+i915-unordered20:05:2712
14351999482482,0cyclictest192375-21kworker/6:2+i915-unordered20:05:2712
14351999481481,0cyclictest321354-21kworker/6:1+i915-unordered23:10:2612
1435109947621,453cyclictest0-21swapper/419:45:2710
1435109947319,453cyclictest0-21swapper/420:05:2710
1435109947319,453cyclictest0-21swapper/420:05:2710
14351599468466,1cyclictest70-21ksoftirqd/521:45:2611
14351999467410,29cyclictest0-21swapper/621:27:2612
143510994672,27cyclictest0-21swapper/419:21:2710
143534994636,59cyclictest0-21swapper/1020:12:492
14352199462460,2cyclictest357695-21kworker/7:2+i915-unordered23:35:2613
143510994628,453cyclictest0-21swapper/420:35:2710
143534994567,29cyclictest0-21swapper/1020:33:102
143534994533,30cyclictest0-21swapper/1021:44:092
14354899452451,1cyclictest179129-21kworker/13:2+i915-unordered20:35:275
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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