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2026-04-10 - 19:57
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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 rackbslot7.osadl.org (updated Fri Apr 10, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5116991363,45cyclictest4985-21latency_hist07:03:320
4966212713,77sleep14997-21apt07:03:281
51169911647,61cyclictest21417-21latency_hist11:58:310
375121169,68sleep23793-21df06:58:482
51169911533,16cyclictest0-21swapper/010:43:310
51169911014,37cyclictest23459-21latency10:13:530
51169910751,10cyclictest29803-21ssh10:23:540
51269910514,68cyclictest26295-21sshd10:18:512
51269910514,68cyclictest26295-21sshd10:18:512
5116991054,40cyclictest1345-21mailstats08:29:000
5116991043,35cyclictest12342-21/usr/sbin/munin11:43:500
5116991038,23cyclictest0-21swapper/009:24:010
5116991033,38cyclictest22850-21unixbench_singl07:54:040
5116991033,28cyclictest8430-21apt-get10:43:350
5121991027,79cyclictest8518-21apt-get08:53:411
5116991012,37cyclictest18618-21sed09:13:310
5126999910,57cyclictest0-21swapper/208:13:522
5126999745,45cyclictest3566-21cut12:23:292
5126999548,38cyclictest15499-21rm09:08:322
5126999531,39cyclictest0-21swapper/211:09:032
512699943,80cyclictest0-21swapper/211:48:402
512699943,80cyclictest0-21swapper/211:48:402
5126999354,34cyclictest5107-21cyclictest10:29:012
5126999330,54cyclictest12009-21diskmemload09:33:122
512199938,52cyclictest31-21ksoftirqd/110:22:051
512199938,52cyclictest31-21ksoftirqd/110:22:051
512199937,57cyclictest31-21ksoftirqd/111:09:051
5121999369,15cyclictest870-21ssh09:36:301
512199923,67cyclictest25333-21apt-get09:24:201
5121999115,52cyclictest31-21ksoftirqd/112:32:371
512199902,75cyclictest15846-21modprobe09:09:241
5121998967,14cyclictest5107-21cyclictest10:09:011
5121998950,15cyclictest181rcu_preempt07:53:301
511699893,42cyclictest9964-21kworker/u18:0+flush-179:011:59:220
511699893,42cyclictest9964-21kworker/u18:0+flush-179:011:59:220
512699882,75cyclictest0-21swapper/207:38:422
5126998741,38cyclictest0-21swapper/210:08:312
512699873,75cyclictest0-21swapper/212:28:372
5126998645,34cyclictest0-21swapper/209:18:532
512699863,63cyclictest352-21runrttasks09:14:082
5126998634,44cyclictest0-21swapper/210:44:282
512699862,67cyclictest25078-21apt-get09:24:012
5126998612,47cyclictest298-21in:imuxsock07:08:272
5126998548,31cyclictest5107-21cyclictest07:24:042
5126998544,34cyclictest25230-21timerandwakeup12:04:022
5121998550,26cyclictest8817-21apt-key08:53:321
511699857,59cyclictest26245-21ssh10:18:440
511699857,59cyclictest26245-21ssh10:18:440
5116998554,13cyclictest181rcu_preempt09:28:390
5116998550,10cyclictest181rcu_preempt12:28:370
5126998440,37cyclictest0-21swapper/209:09:392
512699843,75cyclictest0-21swapper/211:18:432
512699843,75cyclictest0-21swapper/211:18:432
5126998413,39cyclictest12009-21diskmemload10:00:112
512699833,72cyclictest0-21swapper/209:53:432
512699833,72cyclictest0-21swapper/209:53:432
512199832,57cyclictest31-21ksoftirqd/109:39:021
5116998311,63cyclictest18837-21apt-get09:14:200
39142838,55sleep30-21swapper/306:58:573
512699827,50cyclictest0-21swapper/207:38:312
5126998265,10cyclictest7636-21needreboot08:48:552
5126998238,37cyclictest26761-21sh11:13:322
512699822,75cyclictest0-21swapper/211:38:412
512699822,75cyclictest0-21swapper/211:38:412
5126998225,29cyclictest0-21swapper/212:02:002
5126998225,29cyclictest0-21swapper/212:02:002
5121998244,12cyclictest181rcu_preempt09:55:191
5121998244,12cyclictest181rcu_preempt09:55:191
5121998243,17cyclictest181rcu_preempt07:57:371
511699827,60cyclictest31385-21ssh09:33:440
5116998254,20cyclictest15306-21apt-key09:08:320
5126998160,15cyclictest21050-21latency_hist11:58:302
512699813,66cyclictest0-21swapper/209:38:382
5126998134,40cyclictest14929-21/usr/sbin/munin10:53:512
512699812,74cyclictest0-21swapper/207:53:432
5121998164,11cyclictest5107-21cyclictest11:49:281
5121998164,11cyclictest5107-21cyclictest11:49:281
512199812,35cyclictest2058-21latency_hist08:33:311
5121998119,18cyclictest0-21swapper/108:37:381
5116998161,15cyclictest544-21cron08:48:280
512699804,71cyclictest0-21swapper/211:43:392
5126998044,31cyclictest2523-21kworker/u17:4-ext4-rsv-conversion11:08:312
512699802,64cyclictest18645-21apt-get07:43:392
5126998010,58cyclictest29332-21cstates10:23:422
512199806,44cyclictest31-21ksoftirqd/110:53:441
5121998053,12cyclictest181rcu_preempt12:18:311
5121998047,11cyclictest181rcu_preempt07:09:011
5121998047,11cyclictest181rcu_preempt07:09:011
5126997959,14cyclictest6351-21ntp_offset10:38:562
5126997957,12cyclictest10833-21latency_hist09:53:312
512699794,66cyclictest3954-21apt-get08:38:402
5126997940,32cyclictest0-21swapper/211:26:562
512699793,64cyclictest0-21swapper/207:48:422
5126997936,37cyclictest0-21swapper/212:09:002
5126997932,41cyclictest0-21swapper/211:33:552
512699792,65cyclictest0-21swapper/208:23:422
512199798,47cyclictest31-21ksoftirqd/110:33:081
5121997948,22cyclictest30226-21sh12:13:321
5121997943,8cyclictest181rcu_preempt10:33:441
512199793,37cyclictest31-21ksoftirqd/111:43:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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