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2026-04-21 - 00:55
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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
Characteristics of the 100 highest latencies:
System rackcslot4.osadl.org (updated Mon Apr 20, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13200012260184,61sleep10-21swapper/107:08:591
13200522256184,57sleep00-21swapper/007:09:310
179699550,3rtkit-daemon1795-21rtkit-daemon10:55:580
14850812550,5sleep01484837-21python311:55:020
179699530,4rtkit-daemon1795-21rtkit-daemon08:56:060
179699520,4rtkit-daemon1795-21rtkit-daemon08:10:160
179699520,3rtkit-daemon1795-21rtkit-daemon11:47:401
179699510,4rtkit-daemon1795-21rtkit-daemon08:51:060
13731252500,4sleep01373127-21sendmail_mailqu09:15:240
179699490,4rtkit-daemon1795-21rtkit-daemon09:44:211
13442152450,4sleep01342901-21/usr/sbin/munin08:05:270
179699440,3rtkit-daemon1795-21rtkit-daemon08:39:060
179699400,12rtkit-daemon26-21ksoftirqd/112:36:100
179699390,3rtkit-daemon0-21swapper/008:50:211
179699380,3rtkit-daemon0-21swapper/111:44:281
179699370,3rtkit-daemon0-21swapper/112:24:371
179699370,3rtkit-daemon0-21swapper/007:49:310
179699360,5rtkit-daemon1495361-21ssh12:08:471
179699360,4rtkit-daemon0-21swapper/010:24:361
179699360,3rtkit-daemon0-21swapper/112:19:571
179699360,3rtkit-daemon0-21swapper/009:58:201
179699350,4rtkit-daemon1795-21rtkit-daemon10:41:411
179699350,4rtkit-daemon1795-21rtkit-daemon10:36:331
179699350,3rtkit-daemon1795-21rtkit-daemon09:31:011
179699350,3rtkit-daemon0-21swapper/111:14:241
179699350,3rtkit-daemon0-21swapper/010:25:331
179699350,3rtkit-daemon0-21swapper/010:03:141
179699350,3rtkit-daemon0-21swapper/009:18:521
179699350,3rtkit-daemon0-21swapper/009:11:520
179699340,5rtkit-daemon850-21runrttasks08:04:201
179699340,4rtkit-daemon1795-21rtkit-daemon11:09:401
179699340,4rtkit-daemon1795-21rtkit-daemon10:07:060
179699340,4rtkit-daemon0-21swapper/107:22:590
179699340,3rtkit-daemon0-21swapper/012:08:120
179699340,3rtkit-daemon0-21swapper/010:13:441
179699340,3rtkit-daemon0-21swapper/008:43:371
179699330,4rtkit-daemon1795-21rtkit-daemon11:03:091
179699330,3rtkit-daemon0-21swapper/112:33:410
179699320,3rtkit-daemon1795-21rtkit-daemon12:36:021
179699320,3rtkit-daemon1795-21rtkit-daemon10:34:381
179699320,3rtkit-daemon1795-21rtkit-daemon08:02:470
179699320,3rtkit-daemon0-21swapper/111:24:040
179699320,3rtkit-daemon0-21swapper/009:14:361
179699320,3rtkit-daemon0-21swapper/008:56:011
179699320,3rtkit-daemon0-21swapper/008:48:361
179699320,3rtkit-daemon0-21swapper/008:38:511
179699320,3rtkit-daemon0-21swapper/008:10:411
179699320,3rtkit-daemon0-21swapper/007:56:351
179699320,3rtkit-daemon0-21swapper/007:27:171
179699310,4rtkit-daemon1795-21rtkit-daemon11:18:321
179699310,4rtkit-daemon1795-21rtkit-daemon10:51:261
179699310,4rtkit-daemon1795-21rtkit-daemon07:36:280
179699310,4rtkit-daemon1375780-21apt-get09:20:120
179699310,3rtkit-daemon1795-21rtkit-daemon12:33:351
179699310,3rtkit-daemon1795-21rtkit-daemon11:59:270
179699310,3rtkit-daemon0-21swapper/109:44:410
179699310,3rtkit-daemon0-21swapper/107:10:530
179699310,3rtkit-daemon0-21swapper/010:18:011
132021699318,4cyclictest26-21ksoftirqd/112:10:121
179699300,4rtkit-daemon1795-21rtkit-daemon10:10:060
179699300,4rtkit-daemon1490491-21ssh12:00:501
179699300,3rtkit-daemon1795-21rtkit-daemon09:02:100
179699300,3rtkit-daemon1795-21rtkit-daemon08:29:111
179699300,3rtkit-daemon0-21swapper/111:44:350
179699300,3rtkit-daemon0-21swapper/111:15:350
179699300,3rtkit-daemon0-21swapper/007:35:421
132021699304,9cyclictest26-21ksoftirqd/111:30:191
1320216993016,4cyclictest26-21ksoftirqd/108:20:011
179699290,4rtkit-daemon1795-21rtkit-daemon10:59:301
179699290,4rtkit-daemon0-21swapper/011:57:051
179699290,3rtkit-daemon1795-21rtkit-daemon10:09:051
179699290,3rtkit-daemon0-21swapper/008:33:081
132021699296,4cyclictest26-21ksoftirqd/112:25:131
179699280,3rtkit-daemon0-21swapper/109:46:290
179699280,3rtkit-daemon0-21swapper/109:46:290
179699280,3rtkit-daemon0-21swapper/108:23:060
179699280,3rtkit-daemon0-21swapper/007:53:461
1320216992813,4cyclictest26-21ksoftirqd/107:20:221
132021699280,9cyclictest1394772-21/usr/sbin/munin09:45:261
132021699280,9cyclictest1394772-21/usr/sbin/munin09:45:251
179699270,4rtkit-daemon1795-21rtkit-daemon07:27:370
179699270,3rtkit-daemon0-21swapper/111:47:460
179699270,3rtkit-daemon0-21swapper/110:46:050
179699270,3rtkit-daemon0-21swapper/107:16:080
179699270,3rtkit-daemon0-21swapper/009:04:431
179699270,3rtkit-daemon0-21swapper/008:05:351
179699270,1rtkit-daemon1795-21rtkit-daemon09:35:141
1320216992712,4cyclictest26-21ksoftirqd/109:25:181
1320216992711,11cyclictest1444825-21kworker/u8:111:25:131
1320211992724,2cyclictest66950irq/132-enp2s012:12:430
1320211992712,10cyclictest1442021-1kworker/u9:011:10:140
132021699268,2cyclictest141rcu_preempt09:53:211
1320216992610,3cyclictest26-21ksoftirqd/111:35:241
132021199261,11cyclictest1416608-21grep10:15:240
179699250,1rtkit-daemon1795-21rtkit-daemon07:16:011
132021699258,4cyclictest26-21ksoftirqd/111:20:221
132021699258,2cyclictest141rcu_preempt10:46:331
132021699256,3cyclictest26-21ksoftirqd/111:50:171
132021699250,7cyclictest0-21swapper/107:45:141
1320211992522,2cyclictest66950irq/132-enp2s012:28:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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