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2026-07-14 - 06:58
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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 100 highest latencies:
System rack0slot2.osadl.org (updated Tue Jul 14, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1917742992,95sleep70-21swapper/719:09:517
19156329174,14sleep50-21swapper/519:06:535
19169828379,3sleep60-21swapper/619:08:466
7092352650,1sleep7709236-21grep23:05:177
19160023717,8sleep40-21swapper/419:07:244
1997322280,1chrt0-21swapper/519:10:215
192185992724,2cyclictest292572-21kworker/u16:0+events_unbound20:14:594
192191992523,1cyclictest0-21swapper/722:44:597
192190992422,2cyclictest840838-21kworker/u16:4+flush-8:000:25:406
192189992422,2cyclictest205761-21kworker/u16:4+events_unbound19:40:145
19219199232,14cyclictest0-21swapper/722:54:017
192191992220,1cyclictest0-21swapper/721:19:597
192191992218,2cyclictest720235-21iostat_ios23:10:157
192191992217,4cyclictest397763-21cat20:50:317
192191992118,2cyclictest928983-21grep00:35:187
192191992118,2cyclictest788886-21smartctl23:35:307
19219199211,13cyclictest839909-21ssh23:59:097
192190992119,2cyclictest571731-21kworker/u16:3+flush-8:022:15:386
192189992119,2cyclictest755267-21kworker/u16:0+events_unbound23:55:305
192189992119,2cyclictest571731-21kworker/u16:3+events_unbound22:20:075
192191992017,2cyclictest266739-21grep19:45:197
19219199200,18cyclictest648-21systemd-journal19:54:547
192190992018,2cyclictest193143-21kworker/u16:3+events_unbound19:35:296
192189992018,2cyclictest840838-21kworker/u16:4+events_unbound00:25:145
192189992018,2cyclictest634033-21kworker/u16:1+flush-8:000:00:185
192191991918,0cyclictest0-21swapper/723:45:377
192190991917,2cyclictest427929-21kworker/u16:1+events_unbound21:20:066
192189991917,2cyclictest755267-21kworker/u16:0+events_unbound23:40:385
192189991917,2cyclictest634033-21kworker/u16:1+flush-8:023:10:325
192185991915,3cyclictest427371-21latency_hist21:09:594
19218599190,14cyclictest0-21swapper/422:54:044
192191991817,0cyclictest0-21swapper/722:00:377
192191991817,0cyclictest0-21swapper/720:30:357
192191991817,0cyclictest0-21swapper/720:30:357
192190991816,2cyclictest399584-21kworker/u16:0+events_unbound21:49:546
192190991816,1cyclictest0-21swapper/623:07:436
19218999185,5cyclictest0-21swapper/520:49:555
192189991816,2cyclictest634033-21kworker/u16:1+flush-8:023:21:055
192189991816,2cyclictest634033-21kworker/u16:1+events_unbound00:05:045
192191991716,0cyclictest0-21swapper/720:55:287
192191991716,0cyclictest0-21swapper/720:40:317
19219199170,16cyclictest488194-21turbostat21:34:587
192190991715,2cyclictest399584-21kworker/u16:0+events_unbound20:57:066
192190991715,2cyclictest361176-21kworker/u16:0+flush-8:020:35:256
192189991715,2cyclictest427929-21kworker/u16:1+flush-8:022:00:045
192189991715,2cyclictest427929-21kworker/u16:1+flush-8:021:45:285
192189991715,2cyclictest300859-21kworker/u16:2+flush-8:021:40:275
192189991715,2cyclictest300859-21kworker/u16:2+events_unbound22:31:495
192189991715,2cyclictest205761-21kworker/u16:4+events_unbound19:20:285
5120802160,0sleep7512081-21sh21:44:157
19219199163,5cyclictest0-21swapper/722:09:427
192191991613,2cyclictest800769-21ntpq23:40:257
192191991613,2cyclictest499120-21ssh21:37:477
192191991612,3cyclictest1302-21snmpd00:19:127
192190991614,2cyclictest634033-21kworker/u16:1+flush-8:000:35:096
192190991614,2cyclictest634033-21kworker/u16:1+events_unbound22:40:276
192190991614,2cyclictest399584-21kworker/u16:0+events_unbound21:08:596
192190991614,2cyclictest300859-21kworker/u16:2+flush-8:022:10:496
192190991614,2cyclictest193143-21kworker/u16:3+flush-8:019:45:326
192190991614,2cyclictest193143-21kworker/u16:3+events_unbound19:22:396
192190991614,2cyclictest163434-21kworker/u16:1+events_unbound20:41:266
192190991610,6cyclictest6233-21gvfs-afc-volume23:46:386
192189991614,2cyclictest634033-21kworker/u16:1+events_unbound23:07:505
192185991612,3cyclictest634033-21kworker/u16:1+flush-8:023:09:594
19219199157,7cyclictest0-21swapper/719:19:467
19219199152,5cyclictest0-21swapper/722:12:067
192191991514,0cyclictest0-21swapper/720:03:437
192191991510,3cyclictest643788-21sh22:35:507
192191991510,3cyclictest643788-21sh22:35:507
19219199150,14cyclictest0-21swapper/720:29:217
19219199150,14cyclictest0-21swapper/720:29:217
192190991513,2cyclictest779668-21kworker/u16:2+flush-8:000:07:056
192190991513,2cyclictest755267-21kworker/u16:0+events_unbound23:51:006
192190991513,2cyclictest718985-21kworker/u16:0+events_unbound23:10:076
192190991513,2cyclictest703861-21kworker/u16:4+events_unbound23:35:186
192190991513,2cyclictest571731-21kworker/u16:3+events_unbound22:20:176
192190991513,2cyclictest339555-21kworker/u16:3+flush-8:020:45:336
192190991513,2cyclictest339555-21kworker/u16:3+events_unbound20:54:396
192190991513,2cyclictest310500-21kworker/u16:5+flush-8:020:25:206
192190991513,2cyclictest310500-21kworker/u16:5+flush-8:020:25:206
192190991513,2cyclictest300859-21kworker/u16:2+events_unbound22:35:066
192190991513,2cyclictest300859-21kworker/u16:2+events_unbound22:35:066
192190991513,2cyclictest205761-21kworker/u16:4+events_unbound19:32:276
192190991513,2cyclictest163434-21kworker/u16:1+events_unbound20:23:236
19219099150,15cyclictest0-21swapper/622:32:006
192189991513,2cyclictest779668-21kworker/u16:2+events_unbound00:10:195
192189991513,2cyclictest703861-21kworker/u16:4+events_unbound23:39:445
192189991513,2cyclictest634033-21kworker/u16:1+events_unbound00:30:525
192189991513,2cyclictest399584-21kworker/u16:0+events_unbound21:34:595
192189991513,2cyclictest163434-21kworker/u16:1+events_unbound20:17:265
19218999150,1cyclictest0-21swapper/500:35:215
19219199146,7cyclictest0-21swapper/720:09:577
192191991413,0cyclictest0-21swapper/720:48:557
192191991413,0cyclictest0-21swapper/700:34:197
19219199140,7cyclictest777314-21ssh23:30:447
19219199140,6cyclictest0-21swapper/721:00:077
19219199140,6cyclictest0-21swapper/700:04:367
192190991413,1cyclictest0-21swapper/622:50:266
192190991412,2cyclictest840838-21kworker/u16:4+events_unbound00:11:416
192190991412,2cyclictest427929-21kworker/u16:1+events_unbound21:34:356
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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