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2026-06-22 - 14:08
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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 50 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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