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2026-04-21 - 19:19
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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 Apr 21, 2026 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
78746021010,1sleep7787461-21kthreadcore12:29:537
6374972980,1sleep50-21swapper/511:29:485
3471882940,1sleep50-21swapper/509:29:515
6048325848,7sleep50-21swapper/507:05:535
6072825645,8sleep40-21swapper/407:09:214
61046994240,2cyclictest698958-21kworker/u16:1+flush-8:012:04:335
605412403,31sleep70-21swapper/707:06:437
6045523321,8sleep60-21swapper/607:05:306
61053993226,5cyclictest344026-21latency_hist09:29:347
61046993230,2cyclictest112800-21kworker/u16:3+flush-8:008:14:335
61046993229,2cyclictest141474-21kworker/u16:0+events_unbound07:49:485
61046992724,2cyclictest274263-21kworker/u16:1+flush-8:011:09:395
61046992724,2cyclictest274263-21kworker/u16:1+flush-8:011:09:395
61046992624,2cyclictest274263-21kworker/u16:1+events_unbound10:55:025
61053992519,4cyclictest624017-21latency_hist11:24:337
61046992523,2cyclictest274263-21kworker/u16:1+events_unbound10:04:485
61053992419,4cyclictest636171-21latency_hist11:29:337
61053992418,5cyclictest131852-21latency_hist07:44:347
61046992423,1cyclictest782643-21kworker/u16:4+events_unbound12:31:245
61046992419,4cyclictest502128-21kworker/u16:2+flush-8:010:39:335
61046992321,2cyclictest770267-21kworker/u16:0+events_unbound12:35:035
61046992321,2cyclictest698958-21kworker/u16:1+flush-8:012:09:335
61046992321,2cyclictest295639-21kworker/u16:4+events_unbound09:55:025
61042992319,3cyclictest467007-21diskstats10:19:464
6104299230,13cyclictest0-21swapper/411:29:474
61046992220,2cyclictest274263-21kworker/u16:1+flush-8:009:22:545
61053992115,5cyclictest635-21systemd-journal10:24:327
61046992018,2cyclictest633665-21kworker/u16:2+events_unbound11:34:485
61046992018,2cyclictest3566974-21kworker/u16:3+flush-8:007:09:485
61053991913,5cyclictest635-21systemd-journal11:04:327
6105399191,2cyclictest377325-21ssh09:39:577
61053991814,2cyclictest645144-21ssh11:29:577
6105399180,17cyclictest0-21swapper/708:04:577
6105399180,16cyclictest1053-21ntpd08:41:547
61046991817,1cyclictest648500-21kworker/u16:4+events_unbound11:55:335
61046991816,2cyclictest514720-21kworker/u16:5+events_unbound10:50:015
61053991714,2cyclictest1234-21snmpd10:04:177
61053991713,3cyclictest1234-21snmpd07:27:297
61053991711,5cyclictest319576-21latency_hist09:19:337
61048991716,1cyclictest0-21swapper/608:39:176
61048991716,1cyclictest0-21swapper/608:28:016
61048991716,1cyclictest0-21swapper/608:28:016
61048991716,1cyclictest0-21swapper/608:21:526
61048991716,1cyclictest0-21swapper/607:59:216
61048991716,1cyclictest0-21swapper/607:39:536
61048991716,1cyclictest0-21swapper/607:36:496
61048991716,1cyclictest0-21swapper/607:32:436
61048991716,1cyclictest0-21swapper/607:18:236
61048991716,1cyclictest0-21swapper/607:10:126
61048991715,1cyclictest0-21swapper/608:09:356
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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