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2024-04-27 - 00:15
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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 Fri Apr 26, 2024 00:43:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
345995599866447,419cyclictest0-21swapper/500:25:4911
345995399713315,397cyclictest0-21swapper/423:24:1110
345995399686685,1cyclictest0-21swapper/419:32:1110
345995399668293,375cyclictest0-21swapper/421:15:2610
345995399668292,376cyclictest0-21swapper/419:11:1110
345999099569569,0cyclictest0-21swapper/1523:22:127
345996399555149,406cyclictest0-21swapper/723:39:2313
345998499548548,0cyclictest0-21swapper/1421:03:486
34599559954226,513cyclictest0-21swapper/523:04:1411
34599539953691,444cyclictest3463576-21kworker/4:2+i915-unordered19:52:2610
345993899536536,0cyclictest0-21swapper/021:58:490
34599539953530,504cyclictest60-21ksoftirqd/420:10:2610
34599539953529,505cyclictest0-21swapper/400:31:4910
34599539953426,505cyclictest0-21swapper/421:25:1110
34599589953334,499cyclictest0-21swapper/619:15:2612
345999099531531,0cyclictest0-21swapper/1522:24:507
345996599529529,0cyclictest3339437-21kworker/8:1+i915-unordered19:56:2614
34599909952714,57cyclictest0-21swapper/1500:31:117
34599589952727,499cyclictest0-21swapper/620:47:1112
34599559952662,14cyclictest0-21swapper/520:52:4811
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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