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2026-06-12 - 18:25
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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 Jun 12, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
136721186,15sleep00-21swapper/006:55:380
17929910488,10cyclictest14991-21switchtime11:49:480
17929910488,10cyclictest14991-21switchtime11:49:480
17989910247,48cyclictest15633-21cpuspeed10:04:301
1541821020,2sleep2371rcuc/210:04:172
179899983,36cyclictest8116-21timerwakeupswit07:14:531
179899983,36cyclictest8116-21timerwakeupswit07:14:531
1798999740,48cyclictest0-21swapper/110:49:431
1798999740,48cyclictest0-21swapper/110:49:431
179899973,29cyclictest23151-21rm12:04:281
1798999522,12cyclictest0-21swapper/108:24:481
1798999425,9cyclictest0-21swapper/111:49:461
1798999425,9cyclictest0-21swapper/111:49:461
179899933,31cyclictest3554-21munin-node07:04:211
179899933,31cyclictest3554-21munin-node07:04:211
1798999321,28cyclictest16456-21cpu10:59:291
1792999356,12cyclictest12119-21runrttasks07:29:280
179899923,36cyclictest19928-21basename07:54:141
179899923,29cyclictest11062-21wc07:24:491
1798999232,8cyclictest0-21swapper/107:49:171
179899922,34cyclictest16137-21latency_hist10:59:151
1798999143,41cyclictest8411-21processes10:45:421
1798999140,43cyclictest0-21swapper/110:14:471
179899913,34cyclictest880-21ssh12:19:481
179899913,33cyclictest27073-21rm09:29:301
179899913,33cyclictest20804-21sendmail_mailqu07:54:481
179899913,32cyclictest25806-21timerandwakeup08:09:491
179899913,32cyclictest13293-21taskset09:05:181
1798999132,11cyclictest0-21swapper/107:34:391
1798999132,10cyclictest0-21swapper/110:24:351
179899912,37cyclictest5006-21switchtime10:39:491
179899912,37cyclictest5006-21switchtime10:39:491
179899909,66cyclictest24452-21kworker/u19:0+ext4-rsv-conversion08:39:451
179899903,36cyclictest30920-21ls09:34:491
179899903,36cyclictest30920-21ls09:34:491
179899903,33cyclictest5128-21/usr/sbin/munin11:34:351
179899903,31cyclictest15285-21fschecks_count09:09:351
179899903,31cyclictest15285-21fschecks_count09:09:351
1798999031,10cyclictest0-21swapper/111:59:501
1798999031,10cyclictest0-21swapper/111:59:501
1798999028,16cyclictest0-21swapper/111:44:341
179899902,32cyclictest6426-21grep07:09:491
179899902,32cyclictest6426-21grep07:09:491
179899902,31cyclictest24859-21grep08:09:161
179899902,30cyclictest1954-21/usr/sbin/munin06:59:481
1798998941,39cyclictest18818-21kworker/u17:3-writeback11:19:341
1798998941,39cyclictest18818-21kworker/u17:3-writeback11:19:341
179899893,36cyclictest30514-21/usr/sbin/munin10:29:481
179899893,36cyclictest30514-21/usr/sbin/munin10:29:481
179899893,33cyclictest3100-21forks12:24:331
179899893,33cyclictest3100-21forks12:24:331
179899893,33cyclictest2014-21timerwakeupswit10:34:501
179899893,30cyclictest29672-21latency_hist08:24:151
179899893,30cyclictest29672-21latency_hist08:24:151
1798998929,9cyclictest0-21swapper/109:24:461
179899892,39cyclictest3700-21ssh09:44:311
179899892,37cyclictest17179-21cpu11:54:291
179899892,35cyclictest9205-21grep11:39:521
179899892,35cyclictest9205-21grep11:39:521
179899892,33cyclictest32098-21cat12:19:161
1798998863,10cyclictest0-21swapper/111:14:451
179899883,33cyclictest10367-21latency_hist07:24:161
179899883,33cyclictest10367-21latency_hist07:24:161
179899883,31cyclictest26371-21/usr/sbin/munin12:10:421
179899883,31cyclictest2000-21idleruntime-cro08:39:131
179899883,29cyclictest32284-21ssh11:24:461
179899882,33cyclictest2876-21ssh11:29:471
179899882,31cyclictest11716-21latency_hist09:04:171
179899882,31cyclictest11716-21latency_hist09:04:171
179899882,30cyclictest18029-21apt-get09:14:251
179899873,31cyclictest31908-21latency08:29:401
179899873,30cyclictest24509-21/usr/sbin/munin10:19:391
179899873,30cyclictest24509-21/usr/sbin/munin10:19:391
179899872,31cyclictest6714-21head08:49:511
179899872,31cyclictest6714-21head08:49:511
1798998723,16cyclictest0-21swapper/108:14:481
1798998723,16cyclictest0-21swapper/108:14:481
179899864,29cyclictest23179-21latency_hist08:04:161
179899863,36cyclictest10066-21ssh09:54:411
179899863,31cyclictest21283-21rm09:19:361
1798998629,8cyclictest0-21swapper/109:59:421
179899862,36cyclictest6521-21/usr/sbin/munin09:49:371
179899862,33cyclictest22383-21/usr/sbin/munin11:09:541
179899862,31cyclictest5049-21grep08:44:501
1792998637,14cyclictest11330-21kworker/u18:0+events_unbound09:59:130
1792998627,27cyclictest15-21ksoftirqd/009:59:290
1801998565,14cyclictest18306-21sh09:14:372
179899853,34cyclictest8116-21taskset08:54:491
1792998546,7cyclictest181rcu_preempt09:43:230
1792998546,7cyclictest181rcu_preempt09:43:230
179899843,34cyclictest12555-21latency07:29:411
179899843,31cyclictest18856-21grep10:09:351
1798998428,8cyclictest0-21swapper/111:06:231
1798998428,8cyclictest0-21swapper/111:06:231
179899842,35cyclictest854-21ssh09:39:401
179899842,35cyclictest854-21ssh09:39:401
179899842,34cyclictest15307-21/usr/sbin/munin07:39:361
13412836,61sleep10-21swapper/106:55:191
1801998260,15cyclictest1781-21cyclictest12:29:162
1801998260,15cyclictest1781-21cyclictest12:29:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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