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2026-05-31 - 08:59
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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 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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