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2026-04-21 - 20:09
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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 Tue Apr 21, 2026 12:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4466991152,94cyclictest21764-21ssh10:13:020
3567211213,71sleep03588-21pluginstate06:58:250
1948421090,7sleep015313-21kworker/u17:2+xprtiod11:03:050
4466991042,80cyclictest30873-21apt-get10:28:180
44669910179,13cyclictest17188-21kworker/u19:1-rpciod11:53:150
44669910179,13cyclictest17188-21kworker/u19:1-rpciod11:53:150
4475999717,49cyclictest11554-21seq09:02:262
447199973,68cyclictest27136-21apt-get09:28:031
447199973,68cyclictest27136-21apt-get09:28:031
4475999148,35cyclictest0-21swapper/209:13:212
4466999056,12cyclictest181rcu_preempt10:58:450
447599883,74cyclictest0-21swapper/208:22:572
4466998814,43cyclictest15-21ksoftirqd/008:25:410
447599874,71cyclictest0-21swapper/207:52:562
447599874,71cyclictest0-21swapper/207:52:562
4475998744,36cyclictest0-21swapper/209:03:212
447599872,76cyclictest0-21swapper/210:22:572
447199872,67cyclictest16974-21runrttasks11:53:151
447199872,67cyclictest16974-21runrttasks11:53:151
4466998761,18cyclictest6008-21latency_hist07:07:470
4466998761,18cyclictest6008-21latency_hist07:07:470
323028714,46sleep30-21swapper/306:58:113
447599866,65cyclictest31773-21ssh12:18:002
447599853,76cyclictest0-21swapper/211:43:002
447599853,70cyclictest0-21swapper/208:52:572
4471998561,17cyclictest21490-21latency_hist07:52:461
4466998560,17cyclictest18331-21latency_hist07:42:460
4466998518,29cyclictest0-21swapper/010:22:450
4475998465,13cyclictest28427-21sendmail12:12:422
4475998450,30cyclictest15313-21kworker/u17:2-rpciod11:26:092
4475998427,37cyclictest0-21swapper/209:25:162
4466998452,12cyclictest181rcu_preempt12:13:230
4466998451,15cyclictest181rcu_preempt07:22:470
4471998357,17cyclictest0-21swapper/108:18:061
4466998363,14cyclictest298-21in:imuxsock08:07:440
4466998339,10cyclictest181rcu_preempt12:04:290
4466998318,30cyclictest15-21ksoftirqd/008:16:210
4475998259,17cyclictest11606-21diskmemload11:09:032
4475998259,16cyclictest7427-21sh09:48:192
447599824,69cyclictest0-21swapper/207:42:562
447599824,68cyclictest0-21swapper/207:38:002
4475998243,31cyclictest0-21swapper/210:22:462
447599822,68cyclictest0-21swapper/208:07:562
4471998232,21cyclictest0-21swapper/110:50:451
446699828,25cyclictest15-21ksoftirqd/009:17:400
4466998243,14cyclictest181rcu_preempt10:08:190
4466998217,39cyclictest15-21ksoftirqd/007:12:480
4466998213,35cyclictest15-21ksoftirqd/011:13:160
447599814,67cyclictest0-21swapper/208:12:552
447599813,71cyclictest0-21swapper/207:08:372
4466998117,31cyclictest15-21ksoftirqd/008:49:340
446699811,38cyclictest15-21ksoftirqd/007:57:300
446699811,38cyclictest15-21ksoftirqd/007:57:300
4475998064,9cyclictest15313-21kworker/u17:2-rpciod11:07:462
447599804,71cyclictest0-21swapper/210:52:582
4475998046,27cyclictest0-21swapper/211:32:442
4475998038,33cyclictest0-21swapper/210:37:462
4475998011,45cyclictest0-21swapper/209:53:432
447599799,47cyclictest0-21swapper/207:34:462
4475997966,8cyclictest0-21swapper/207:02:472
4475997960,13cyclictest11606-21diskmemload12:05:332
4475997959,13cyclictest11606-21diskmemload12:12:472
4475997956,17cyclictest11589-21kworker/u18:0+events_unbound09:22:432
447599794,64cyclictest0-21swapper/211:12:552
447599794,55cyclictest352-21runrttasks11:38:432
447599794,55cyclictest352-21runrttasks11:38:432
4475997939,33cyclictest0-21swapper/211:58:012
447599793,71cyclictest0-21swapper/208:37:582
447599793,67cyclictest30106-21ssh09:32:552
4475997927,41cyclictest0-21swapper/210:43:442
4471997960,13cyclictest4412-21sendmail11:32:431
4466997947,13cyclictest181rcu_preempt11:48:260
4466997946,25cyclictest2374-21systemd-journal10:42:480
4466997940,17cyclictest181rcu_preempt12:00:430
446699793,60cyclictest27197-21sh09:28:040
446699793,60cyclictest27197-21sh09:28:040
4466997926,12cyclictest181rcu_preempt09:27:480
4466997920,15cyclictest0-21swapper/009:18:470
447599786,52cyclictest0-21swapper/208:19:212
447599785,69cyclictest0-21swapper/211:48:002
447599782,64cyclictest0-21swapper/209:57:552
447599776,61cyclictest4401-21ssh10:37:592
4475997757,13cyclictest6194-21timerandwakeup08:43:182
447599775,67cyclictest0-21swapper/207:22:562
447599774,66cyclictest0-21swapper/207:47:592
447599774,65cyclictest11606-21diskmemload12:27:592
4475997729,36cyclictest2506-21if_eth008:33:082
4475997729,36cyclictest2506-21if_eth008:33:082
4471997733,20cyclictest31-21ksoftirqd/110:45:141
4466997749,8cyclictest181rcu_preempt09:11:280
446699773,36cyclictest12744-21switchtime09:03:190
446699773,33cyclictest14059-21grep10:53:170
446699771,40cyclictest15-21ksoftirqd/010:41:210
4466997711,31cyclictest15-21ksoftirqd/011:40:170
4466997711,31cyclictest15-21ksoftirqd/011:40:170
42952779,35sleep10-21swapper/107:02:131
447599764,65cyclictest0-21swapper/207:57:592
447599764,65cyclictest0-21swapper/207:57:592
447599764,59cyclictest0-21swapper/207:17:552
4475997641,29cyclictest12170-21ssh10:50:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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