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2025-12-20 - 14:18
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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 Sat Dec 20, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
209040326048,8sleep60-21swapper/607:07:046
208133225542,8sleep50-21swapper/507:04:385
209050925419,31sleep70-21swapper/707:08:337
209039224736,8sleep40-21swapper/407:06:544
2090879993731,4cyclictest2288249-21latency_hist08:49:277
2090879993529,5cyclictest2685654-21latency_hist12:14:277
2090876993128,2cyclictest1355985-21kworker/u16:5+flush-8:008:34:586
2090879992923,5cyclictest650-21systemd-journal11:44:277
2090876992927,2cyclictest2500386-21kworker/u16:3+flush-8:011:44:226
2090876992926,2cyclictest2423545-21kworker/u16:4+events_unbound10:39:426
2090871992825,2cyclictest2006655-21kworker/u16:3+flush-8:007:49:435
2090863992723,3cyclictest2626505-21kworker/u16:1+flush-8:011:49:584
2090876992624,2cyclictest2258279-21kworker/u16:1+flush-8:008:54:556
2090876992623,2cyclictest2142067-21kworker/u16:2+events_unbound07:39:416
2090876992421,2cyclictest1355985-21kworker/u16:5+flush-8:008:04:446
2090863992321,2cyclictest1355985-21kworker/u16:5+flush-8:007:44:544
2090879992213,8cyclictest650-21systemd-journal12:39:277
2090871992220,2cyclictest2414110-21kworker/u16:1+events_unbound10:09:425
2090876992119,2cyclictest2142067-21kworker/u16:2+events_unbound08:14:406
2090876992017,2cyclictest2345540-21kworker/u16:3+flush-8:009:29:536
2090879991913,5cyclictest2608038-21latency_hist11:34:277
2090876991917,2cyclictest2659413-21kworker/u16:0+flush-8:012:19:226
2090876991917,2cyclictest2659413-21kworker/u16:0+flush-8:012:19:226
2090876991917,2cyclictest2500386-21kworker/u16:3+flush-8:011:34:426
2090871991916,2cyclictest2006655-21kworker/u16:3+events_unbound07:09:435
2090871991915,3cyclictest2527092-21kworker/u16:2+flush-8:010:54:585
2090876991816,2cyclictest2695191-21kworker/u16:1+events_unbound12:19:446
2090876991816,2cyclictest2500386-21kworker/u16:3+events_unbound11:44:416
209087999177,2cyclictest6053-21gmain09:09:257
2090879991715,1cyclictest0-21swapper/707:39:527
2090879991711,5cyclictest2210860-21latency_hist08:09:277
2090876991715,2cyclictest2162790-21kworker/u16:1+events_unbound07:54:506
2090876991715,2cyclictest2142067-21kworker/u16:2+flush-8:008:19:586
2090876991714,2cyclictest2659413-21kworker/u16:0+flush-8:012:09:586
2090876991614,2cyclictest2527092-21kworker/u16:2+events_unbound10:49:566
2090876991613,2cyclictest2685434-21kworker/u16:2+flush-8:012:29:426
2090876991613,2cyclictest2511450-21kworker/u16:0+events_unbound10:44:416
2090863991613,2cyclictest2511450-21kworker/u16:0+flush-8:010:44:534
209087999159,5cyclictest2695342-21latency_hist12:19:277
209087999159,5cyclictest2695342-21latency_hist12:19:277
209087999159,5cyclictest2259217-21latency_hist08:34:287
209087999159,5cyclictest1267-21snmpd12:32:127
209087999159,5cyclictest1267-21snmpd10:30:067
209087999159,5cyclictest1267-21snmpd10:21:067
209087999152,6cyclictest5944-21gmain10:24:537
2090879991511,3cyclictest1267-21snmpd07:17:527
209087999150,9cyclictest0-21swapper/712:24:477
209087999150,1cyclictest0-21swapper/712:19:497
209087999150,13cyclictest0-21swapper/711:44:527
209087999150,13cyclictest0-21swapper/710:49:527
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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