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2026-09-17 - 21:24
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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 Thu Sep 17, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1229421910,22sleep0161ktimers/019:09:060
173121160,28sleep21734-21fschecks_count20:14:282
123939910371,11cyclictest181rcu_preempt19:34:200
12393999642,29cyclictest14273-21ssh23:40:090
12393999642,29cyclictest14273-21ssh23:40:090
12393999633,31cyclictest15-21ksoftirqd/000:04:070
12393999558,30cyclictest0-21swapper/020:24:370
12393999470,18cyclictest6013-21kernelversion21:39:310
12393999455,9cyclictest181rcu_preempt00:04:110
12393999455,9cyclictest181rcu_preempt00:04:110
12401999245,12cyclictest181rcu_preempt21:41:242
12393999169,14cyclictest343-21runrttasks23:53:190
12393999169,14cyclictest343-21runrttasks23:53:190
12393999163,19cyclictest4518-21latency_hist23:24:070
12401999061,20cyclictest1622-21sh23:19:192
1239399903,43cyclictest15-21ksoftirqd/021:33:480
113112909,56sleep211388-21cat19:05:102
12401998934,12cyclictest181rcu_preempt22:49:362
12393998841,12cyclictest181rcu_preempt22:24:200
12393998841,12cyclictest181rcu_preempt22:24:200
123062886,52sleep112330-21ls19:09:081
12398998767,14cyclictest16510-21sh00:35:411
12398998760,20cyclictest9336-21sh20:39:031
12398998760,20cyclictest9336-21sh20:39:031
1239399878,38cyclictest15-21ksoftirqd/022:37:520
1239399878,38cyclictest15-21ksoftirqd/022:37:520
12393998646,14cyclictest181rcu_preempt20:50:130
12393998559,8cyclictest181rcu_preempt22:48:270
12398998464,14cyclictest10454-21sh00:25:381
12398998425,24cyclictest0-21swapper/123:50:131
12398998425,24cyclictest0-21swapper/123:50:131
12393998455,21cyclictest4711-21latency_hist20:24:070
12393998448,11cyclictest181rcu_preempt20:59:260
12393998426,29cyclictest0-21swapper/000:28:140
12401998362,7cyclictest181rcu_preempt22:32:522
12401998361,15cyclictest200-21systemd-journal23:47:262
12401998345,8cyclictest181rcu_preempt19:19:312
12401998343,11cyclictest181rcu_preempt21:56:002
1240199831,38cyclictest39-21ksoftirqd/200:14:582
12393998367,11cyclictest12382-21cyclictest21:34:400
12393998367,11cyclictest12382-21cyclictest21:34:400
12393998360,8cyclictest181rcu_preempt22:58:140
12393998355,8cyclictest181rcu_preempt23:05:370
12393998328,33cyclictest0-21swapper/022:19:390
12401998241,13cyclictest181rcu_preempt23:43:252
12401998241,13cyclictest181rcu_preempt23:43:252
12401998236,17cyclictest181rcu_preempt23:58:362
12401998236,17cyclictest181rcu_preempt23:58:362
12398998266,10cyclictest25086-21ssh23:04:281
12398998262,14cyclictest12382-21cyclictest20:59:041
12398998228,26cyclictest0-21swapper/122:49:371
12393998257,20cyclictest12382-21cyclictest22:14:310
12401998152,8cyclictest181rcu_preempt20:21:062
12401998151,7cyclictest181rcu_preempt20:55:512
12401998141,8cyclictest181rcu_preempt20:40:022
12398998152,22cyclictest0-21swapper/100:04:391
12398998152,22cyclictest0-21swapper/100:04:391
12393998152,8cyclictest181rcu_preempt23:10:410
12393998152,8cyclictest181rcu_preempt23:10:410
12393998150,11cyclictest181rcu_preempt21:05:200
12393998141,28cyclictest17949-21cut21:59:250
12393998138,32cyclictest3052-21ssh00:14:200
1239399813,50cyclictest15-21ksoftirqd/019:49:290
12401998044,9cyclictest181rcu_preempt19:43:092
12393998057,8cyclictest181rcu_preempt21:17:250
12393998051,16cyclictest181rcu_preempt23:44:320
12393998038,13cyclictest181rcu_preempt21:51:510
12393998036,8cyclictest181rcu_preempt19:14:380
12393998036,8cyclictest181rcu_preempt19:14:380
12401997958,13cyclictest12382-21cyclictest21:18:402
12401997940,10cyclictest181rcu_preempt19:51:222
12401997935,12cyclictest181rcu_preempt21:21:462
12401997933,8cyclictest181rcu_preempt20:04:142
12398997960,13cyclictest5246-21netstat20:24:311
1239899793,67cyclictest31786-21apt-get00:09:181
1239899793,67cyclictest31786-21apt-get00:09:181
12393997944,17cyclictest181rcu_preempt22:13:570
12393997936,10cyclictest181rcu_preempt22:44:000
1239399793,40cyclictest15-21ksoftirqd/021:54:360
1239399792,34cyclictest15-21ksoftirqd/022:04:240
12401997843,16cyclictest181rcu_preempt00:36:492
12401997837,13cyclictest181rcu_preempt20:35:462
12401997837,13cyclictest181rcu_preempt20:35:462
1240199783,42cyclictest39-21ksoftirqd/220:49:212
12398997833,33cyclictest0-21swapper/119:29:061
12393997857,14cyclictest200-21systemd-journal21:29:040
12393997836,15cyclictest181rcu_preempt23:18:120
12393997833,36cyclictest24049-21grep23:54:400
12393997833,36cyclictest24049-21grep23:54:400
12393997832,8cyclictest181rcu_preempt20:04:190
12393997831,24cyclictest15-21ksoftirqd/022:59:370
12393997831,24cyclictest15-21ksoftirqd/022:59:370
73072770,15sleep0161ktimers/023:29:030
12401997733,15cyclictest181rcu_preempt21:09:082
12401997733,15cyclictest181rcu_preempt21:09:082
12398997762,10cyclictest12382-21cyclictest20:49:291
12398997756,15cyclictest1-21systemd21:38:191
12398997756,15cyclictest1-21systemd21:38:191
12398997755,16cyclictest662-21cron22:44:031
12398997749,22cyclictest7062-21ntp_kernel_err22:34:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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