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2026-06-22 - 08:50
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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 Mon Jun 22, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1607324330,49sleep216075-21switchtime18:54:192
1607324330,49sleep216075-21switchtime18:54:192
16659213012,85sleep116678-21munin-plugin-st18:58:351
16659213012,85sleep116678-21munin-plugin-st18:58:351
1531821126,15sleep00-21swapper/018:53:450
1531821126,15sleep00-21swapper/018:53:450
16816991084,41cyclictest28751-21munin-run23:48:350
168229910233,31cyclictest0-21swapper/100:26:211
16822999530,32cyclictest0-21swapper/121:13:411
16822999424,45cyclictest6750-21sh23:10:311
1681699947,64cyclictest2374-21systemd-journal21:59:320
16822999045,39cyclictest10356-21latency_hist22:23:371
25772880,8sleep22582-21gpgv23:58:382
16822998841,41cyclictest0-21swapper/121:58:391
16822998841,41cyclictest0-21swapper/121:58:391
16816998862,19cyclictest544-21cron20:28:360
16816998763,15cyclictest0-21swapper/023:58:520
16822998636,43cyclictest28221-21sort19:30:521
16816998652,12cyclictest181rcu_preempt21:07:260
16816998636,7cyclictest181rcu_preempt22:25:270
16816998626,37cyclictest15-21ksoftirqd/000:09:100
16824998558,18cyclictest20825-21sendmail_mailqu23:34:082
16822998442,35cyclictest0-21swapper/123:13:581
16822998442,35cyclictest0-21swapper/123:13:581
16822998439,37cyclictest0-21swapper/122:03:361
16816998462,8cyclictest181rcu_preempt23:08:370
16822998366,10cyclictest3740-21/usr/sbin/munin21:18:521
16816998350,16cyclictest181rcu_preempt22:43:080
16824998161,14cyclictest10889-21apt-key20:18:372
16822998163,12cyclictest2374-21systemd-journal21:43:361
16822998143,31cyclictest9145-21ssh00:08:571
1681699813,50cyclictest352-21runrttasks22:10:210
16816998110,39cyclictest15-21ksoftirqd/019:48:510
16824998060,13cyclictest14992-21netstat20:29:012
16824998060,13cyclictest14992-21netstat20:29:012
16822998063,10cyclictest31248-21timerwakeupswit21:09:141
16822998063,10cyclictest31248-21timerwakeupswit21:09:141
16822998060,14cyclictest16797-21sh23:28:351
16822998037,34cyclictest0-21swapper/119:48:361
16822998037,34cyclictest0-21swapper/119:48:361
16822998031,41cyclictest0-21swapper/122:34:081
1682299802,43cyclictest23952-21diskmemload23:38:151
16816998059,8cyclictest181rcu_preempt19:28:360
16816998054,20cyclictest2713-21latency_hist23:58:390
16816998041,21cyclictest16802-21cyclictest20:53:380
16816998039,9cyclictest0-21swapper/000:19:040
1681699803,54cyclictest16088-21ssh21:39:070
16824997957,16cyclictest27755-21apt-key21:58:372
16824997957,16cyclictest27755-21apt-key21:58:372
1682499792,55cyclictest3077-21cpuspeed23:59:172
1682299794,62cyclictest0-21swapper/120:33:451
1682299794,62cyclictest0-21swapper/120:33:451
16822997930,42cyclictest0-21swapper/122:14:001
16816997936,17cyclictest181rcu_preempt00:16:320
16816997936,17cyclictest181rcu_preempt00:16:320
1681699793,45cyclictest27358-21apt-get19:28:500
16824997857,15cyclictest23337-21fschecks_count23:38:562
16822997860,11cyclictest14549-21ssh22:29:111
16822997840,31cyclictest23952-21diskmemload23:20:101
16816997856,14cyclictest2374-21systemd-journal22:37:270
16816997853,11cyclictest181rcu_preempt22:53:570
16816997844,26cyclictest211rcuc/020:54:020
16816997840,12cyclictest181rcu_preempt22:28:430
16816997839,12cyclictest181rcu_preempt20:23:210
1681699783,30cyclictest15-21ksoftirqd/023:12:020
16824997753,16cyclictest16802-21cyclictest19:14:112
16824997739,29cyclictest25225-21latency_hist19:23:352
16822997737,32cyclictest0-21swapper/121:29:041
16822997718,22cyclictest26509-21ls22:49:111
16822997718,22cyclictest26509-21ls22:49:111
16816997755,16cyclictest8730-21unixbench_multi20:09:110
16816997755,16cyclictest8730-21unixbench_multi20:09:110
16816997750,18cyclictest25935-21latency_hist23:43:370
1681699773,38cyclictest9221-21head23:14:110
1681699773,38cyclictest9221-21head23:14:110
16816997716,22cyclictest15-21ksoftirqd/019:08:390
16824997661,9cyclictest1382-21ntp_offset21:14:042
16822997657,13cyclictest5051-21sh00:02:211
16822997656,14cyclictest26888-21apt-key19:28:371
1682299764,67cyclictest0-21swapper/123:03:471
16822997636,32cyclictest0-21swapper/122:08:381
16822997635,34cyclictest20405-21sendmail_mailst22:39:091
16822997631,37cyclictest0-21swapper/122:43:511
1682299762,63cyclictest0-21swapper/123:53:481
16816997656,7cyclictest181rcu_preempt00:26:460
1681699765,37cyclictest15-21ksoftirqd/019:56:460
16816997649,10cyclictest181rcu_preempt20:29:310
16816997649,10cyclictest181rcu_preempt20:29:310
16816997648,7cyclictest181rcu_preempt21:20:230
16816997642,12cyclictest181rcu_preempt19:34:420
16816997637,17cyclictest181rcu_preempt22:46:510
16824997559,9cyclictest0-21swapper/223:29:032
16824997558,11cyclictest1-21systemd19:43:362
16824997556,12cyclictest297-21systemd-logind21:33:362
1682499753,50cyclictest28182-21apt-get21:58:522
16822997557,12cyclictest2374-21systemd-journal21:03:351
16822997545,22cyclictest19786-21modprobe23:33:341
16816997553,15cyclictest17773-21sh23:29:070
16816997544,16cyclictest181rcu_preempt20:13:580
16816997544,11cyclictest181rcu_preempt20:35:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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