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2025-12-08 - 13:10
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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
Characteristics of the 20 highest latencies:
System rackcslot2.osadl.org (updated Mon Dec 08, 2025 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94952730,2sleep12768099cyclictest00:05:341
101872710,0sleep00-21swapper/021:51:530
2716427048,17sleep10-21swapper/119:03:091
2709126855,8sleep00-21swapper/019:02:260
48162670,1sleep10-21swapper/119:31:391
291372640,0sleep10-21swapper/123:02:041
27680993131,0cyclictest0-21swapper/120:46:511
27680993111,11cyclictest0-21swapper/123:38:031
27679993110,0cyclictest0-21swapper/023:39:020
2768099300,29cyclictest0-21swapper/100:17:431
27680992910,19cyclictest0-21swapper/121:20:011
27680992910,10cyclictest0-21swapper/122:33:021
2768099290,1cyclictest22347-21ssh00:22:481
27679992927,1cyclictest7-21ksoftirqd/020:46:390
2767999291,24cyclictest0-21swapper/023:35:330
27680992824,3cyclictest5202-21kworker/u4:021:41:521
27679992810,1cyclictest0-21swapper/022:51:050
27679992810,0cyclictest0-21swapper/021:49:230
27679992810,0cyclictest0-21swapper/021:49:230
27680992710,12cyclictest0-21swapper/123:31:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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