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2026-05-05 - 04:36
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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 50 highest latencies:
System rack0slot2.osadl.org (updated Tue May 05, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35989242750,1sleep73598925-21ssh00:21:397
289185824737,7sleep50-21swapper/519:06:545
2892270994442,2cyclictest3307003-21kworker/u16:0+flush-8:023:08:404
2892270994240,2cyclictest3107795-21kworker/u16:4+flush-8:021:29:124
2892270994038,2cyclictest3430368-21kworker/u16:1+events_unbound23:33:394
28917222395,29sleep70-21swapper/719:05:037
289227799360,34cyclictest3236109-21latency_hist21:53:397
2892270993533,2cyclictest3369698-21kworker/u16:2+events_unbound22:59:024
2892277993429,4cyclictest635-21systemd-journal22:13:347
289227799340,32cyclictest635-21systemd-journal23:03:347
289227799340,32cyclictest3624245-21updatedb00:33:357
2892270993432,2cyclictest3107795-21kworker/u16:4+events_unbound21:38:194
2892270993331,2cyclictest3502538-21kworker/u16:0+flush-8:000:09:084
2892270993331,2cyclictest3502538-21kworker/u16:0+flush-8:000:09:084
33224052320,1chrt0-21swapper/622:28:546
2892270993230,2cyclictest3334973-21kworker/u16:4+events_unbound23:56:524
2892277993130,0cyclictest0-21swapper/721:29:057
2892277993129,1cyclictest0-21swapper/721:34:037
2892270993128,2cyclictest3430368-21kworker/u16:1+events_unbound23:41:504
289175723120,8sleep40-21swapper/419:05:324
2892277993025,4cyclictest3138997-21latency_hist21:13:397
2892270993028,2cyclictest3573373-21kworker/u16:2+events_unbound00:32:114
2892270993028,2cyclictest3430368-21kworker/u16:1+events_unbound23:35:114
2892270993028,2cyclictest3334973-21kworker/u16:4+events_unbound23:25:034
2892270992927,2cyclictest3246683-21kworker/u16:0+events_unbound22:04:504
2892270992927,2cyclictest3107795-21kworker/u16:4+events_unbound21:47:124
2892270992926,2cyclictest3430368-21kworker/u16:1+events_unbound00:03:474
2892270992826,2cyclictest3430368-21kworker/u16:1+flush-8:023:46:554
2892270992826,2cyclictest3307003-21kworker/u16:0+events_unbound22:29:354
2892270992725,2cyclictest3430368-21kworker/u16:1+flush-8:023:16:434
2892270992725,2cyclictest3077953-21kworker/u16:1+events_unbound22:22:234
2892270992725,2cyclictest3077953-21kworker/u16:1+events_unbound21:59:124
2892270992725,2cyclictest3077953-21kworker/u16:1+events_unbound21:59:124
2892270992724,2cyclictest3334973-21kworker/u16:4+events_unbound22:43:554
2892270992724,2cyclictest3334973-21kworker/u16:4+events_unbound22:43:554
2892270992624,2cyclictest3107795-21kworker/u16:4+events_unbound21:16:594
2892270992624,2cyclictest3077953-21kworker/u16:1+events_unbound22:15:194
2892270992624,2cyclictest2188985-21kworker/u16:3+flush-8:019:24:024
289168322616,7sleep60-21swapper/619:04:306
2892277992521,3cyclictest635-21systemd-journal21:48:357
2892270992523,2cyclictest3600162-21kworker/u16:4+events_unbound00:28:124
2892270992523,2cyclictest3334973-21kworker/u16:4+events_unbound22:49:494
2892270992523,2cyclictest3223993-21kworker/u16:2+events_unbound21:53:394
2892277992419,4cyclictest3442453-21latency_hist23:18:397
2892270992422,2cyclictest3502538-21kworker/u16:0+events_unbound23:53:064
2892270992422,2cyclictest3430368-21kworker/u16:1+events_unbound23:21:444
2892270992422,2cyclictest3077953-21kworker/u16:1+flush-8:022:40:324
2892270992422,2cyclictest3021180-21kworker/u16:0+events_unbound21:10:404
2892270992321,2cyclictest3573373-21kworker/u16:2+events_unbound00:20:144
2892270992321,2cyclictest3502538-21kworker/u16:0+flush-8:000:01:104
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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