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2026-05-31 - 01:20
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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 Sun May 31, 2026 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
310984825848,7sleep40-21swapper/419:05:424
310984825848,7sleep40-21swapper/419:05:424
3110234994440,4cyclictest3257480-21kworker/u16:2+flush-8:022:26:565
31026392434,33sleep70-21swapper/719:02:167
31026392434,33sleep70-21swapper/719:02:167
3110242993633,2cyclictest3429982-21ssh21:42:117
3110234993634,2cyclictest3597579-21kworker/u16:4+flush-8:000:01:515
3110242993429,4cyclictest3597387-21latency_hist22:51:567
3110234993432,2cyclictest3718146-21kworker/u16:0+events_unbound00:26:505
3110234993432,2cyclictest3718146-21kworker/u16:0+events_unbound00:26:505
3110234993432,2cyclictest3654854-21kworker/u16:2+events_unbound23:36:425
33905142330,0chrt3390512-21ssh21:23:097
311024299330,32cyclictest124-21kswapd000:27:097
311024299330,32cyclictest124-21kswapd000:27:097
3110234993331,2cyclictest3802331-21kworker/u16:4+events_unbound00:16:425
3110234993331,2cyclictest3257480-21kworker/u16:2+events_unbound21:41:515
3110234993331,2cyclictest3257480-21kworker/u16:2+events_unbound21:41:515
3110234993331,2cyclictest3047314-21kworker/u16:1+events_unbound19:22:195
310979023322,8sleep50-21swapper/519:04:555
310979023322,8sleep50-21swapper/519:04:555
36333922320,1chrt3633394-21ssh23:06:167
36333922320,1chrt3633394-21ssh23:06:167
3110234993230,2cyclictest3325173-21kworker/u16:0+events_unbound21:17:185
3110234993227,4cyclictest3047314-21kworker/u16:1+flush-8:019:41:565
3110242993025,4cyclictest635-21systemd-journal22:56:517
3110234993026,3cyclictest3152628-21kworker/u16:3+flush-8:020:12:165
3110234993026,3cyclictest3152628-21kworker/u16:3+flush-8:020:12:165
310990622818,7sleep60-21swapper/619:06:326
310990622818,7sleep60-21swapper/619:06:326
3110242992724,2cyclictest3763304-21sh23:57:197
3110242992722,4cyclictest3428741-21latency_hist21:41:567
3110242992722,4cyclictest3428741-21latency_hist21:41:567
3110238992725,2cyclictest3257480-21kworker/u16:2+events_unbound20:27:106
3110234992724,2cyclictest3152628-21kworker/u16:3+flush-8:020:22:145
3110234992722,5cyclictest3440788-21kworker/u16:0+flush-8:022:36:565
3110242992625,0cyclictest0-21swapper/719:22:117
3110242992620,5cyclictest635-21systemd-journal23:21:567
311024299260,1cyclictest0-21swapper/720:07:207
3110234992523,2cyclictest3740532-21kworker/u16:1+events_unbound00:05:105
3110234992523,2cyclictest3654854-21kworker/u16:2+flush-8:023:27:025
3110234992523,2cyclictest3277165-21kworker/u16:1+events_unbound21:42:155
3110234992523,2cyclictest3257480-21kworker/u16:2+events_unbound21:07:275
3110242992419,4cyclictest635-21systemd-journal22:26:567
3110234992422,2cyclictest3740532-21kworker/u16:1+events_unbound00:36:505
3110234992422,2cyclictest3654854-21kworker/u16:2+events_unbound23:46:425
3110234992422,2cyclictest3654854-21kworker/u16:2+events_unbound23:46:425
3110234992422,2cyclictest3257480-21kworker/u16:2+events_unbound22:12:285
3110234992422,2cyclictest3257480-21kworker/u16:2+events_unbound22:04:065
3110234992321,2cyclictest3777047-21kworker/u16:2+events_unbound00:09:345
3110234992321,2cyclictest3257480-21kworker/u16:2+flush-8:022:47:245
3110234992321,2cyclictest3257480-21kworker/u16:2+events_unbound22:07:065
3110234992220,2cyclictest3152628-21kworker/u16:3+events_unbound20:32:135
3110234992118,2cyclictest3718146-21kworker/u16:0+flush-8:000:17:065
3110234992117,3cyclictest3257480-21kworker/u16:2+flush-8:021:22:165
3110242992017,2cyclictest124-21kswapd000:32:097
3110234992018,2cyclictest3597579-21kworker/u16:4+flush-8:023:17:225
3110234992018,2cyclictest3597579-21kworker/u16:4+events_unbound22:54:065
3110234992018,2cyclictest3277165-21kworker/u16:1+events_unbound21:32:285
3110234992018,2cyclictest3047314-21kworker/u16:1+events_unbound19:27:165
3110234992018,2cyclictest3047314-21kworker/u16:1+events_unbound19:27:165
3110231992016,3cyclictest3718146-21kworker/u16:0+flush-8:000:07:234
311024299192,15cyclictest1234-21snmpd21:50:467
3110242991916,1cyclictest3502765-21ssh22:12:137
311024299190,17cyclictest3706044-21latency_hist23:36:557
3110234991917,2cyclictest3440788-21kworker/u16:0+flush-8:022:37:165
3110234991917,2cyclictest3257480-21kworker/u16:2+events_unbound21:56:405
311024299189,8cyclictest6101-21gmain23:12:147
3110242991817,0cyclictest0-21swapper/719:42:277
3110242991814,3cyclictest124-21kswapd000:06:567
311024299180,16cyclictest0-21swapper/720:27:187
3110234991816,2cyclictest3718146-21kworker/u16:0+events_unbound23:55:355
3110234991816,2cyclictest3654854-21kworker/u16:2+events_unbound23:37:215
3110234991816,2cyclictest3546837-21kworker/u16:1+events_unbound22:43:545
3110234991815,2cyclictest3597579-21kworker/u16:4+flush-8:022:57:145
3110242991712,4cyclictest3501047-21latency_hist22:11:567
3110242991711,5cyclictest3228965-21latency_hist20:06:567
3110242991711,5cyclictest3200213-21latency_hist19:51:577
3110234991715,2cyclictest3718146-21kworker/u16:0+events_unbound23:47:545
3110234991715,2cyclictest3718146-21kworker/u16:0+events_unbound00:30:345
3110234991715,2cyclictest3718146-21kworker/u16:0+events_unbound00:30:345
3110234991715,2cyclictest3597427-21kworker/u16:1+events_unbound23:04:275
3110234991715,2cyclictest3597427-21kworker/u16:1+events_unbound23:04:275
3110234991715,2cyclictest3380494-21kworker/u16:3+events_unbound22:20:315
3110234991715,2cyclictest3380494-21kworker/u16:3+events_unbound22:20:315
3110234991715,2cyclictest3152628-21kworker/u16:3+flush-8:020:07:145
3110234991715,2cyclictest3152628-21kworker/u16:3+flush-8:019:32:205
3110231991713,3cyclictest3802269-40logrotate00:16:284
3110231991713,3cyclictest3243125-21kthreadcore20:12:164
3110231991713,3cyclictest3243125-21kthreadcore20:12:164
311023199170,3cyclictest3570236-21ntpq22:37:194
311023199170,1cyclictest0-21swapper/422:50:434
311023199170,1cyclictest0-21swapper/421:18:484
311023199170,14cyclictest0-21swapper/421:47:394
37286592160,1chrt3728658-21ssh23:44:067
37286592160,1chrt3728658-21ssh23:44:067
3110242991611,4cyclictest3694036-21latency_hist23:31:567
3110238991613,2cyclictest3152628-21kworker/u16:3+flush-8:019:37:126
3110234991614,2cyclictest3125340-21kworker/u16:2+flush-8:019:17:245
311023199160,15cyclictest3352939-21latency21:07:184
3110242991512,2cyclictest0-21swapper/700:11:567
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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