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2026-06-20 - 12:42
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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 Sat Jun 20, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
528421280,10sleep15285-21ssh22:43:451
31993991172,70cyclictest17275-21ssh22:09:040
31827211214,65sleep131860-21munin-plugin-st18:58:441
31827211214,65sleep131860-21munin-plugin-st18:58:441
319979910257,33cyclictest32642-21latency_hist20:38:431
31997991004,76cyclictest26703-21apt-get00:14:011
31997991004,76cyclictest26703-21apt-get00:14:011
3199799993,67cyclictest17265-21ssh22:09:031
31993999742,24cyclictest31981-21cyclictest21:39:480
31993999742,24cyclictest31981-21cyclictest21:39:480
3199399962,74cyclictest13711-21kworker/u19:1+ext4-rsv-conversion00:14:110
3199399962,74cyclictest13711-21kworker/u19:1+ext4-rsv-conversion00:14:110
31997999462,20cyclictest23446-21latency_hist00:08:471
32000999213,34cyclictest0-21swapper/200:00:282
31993999254,11cyclictest181rcu_preempt22:41:420
32000999171,12cyclictest11490-21apt-get22:53:532
32000999028,50cyclictest29292-21sshd23:23:582
32000999019,29cyclictest0-21swapper/223:33:492
32000999019,29cyclictest0-21swapper/223:33:492
31993999063,8cyclictest181rcu_preempt20:49:050
31993999063,19cyclictest7283-21sh20:59:060
32000998920,27cyclictest24086-21sed00:09:112
31997998967,11cyclictest0-21swapper/122:53:461
31997998966,14cyclictest9901-21cpuspeed19:29:001
31997998965,16cyclictest2374-21systemd-journal22:20:591
31993998953,30cyclictest17138-21latency_hist22:08:480
32000998824,27cyclictest14197-21tail21:09:192
32000998822,27cyclictest19676-21snmpd20:34:182
31997998864,15cyclictest10276-21kworker/u17:2-rpciod21:19:141
3199799882,63cyclictest8278-21ssh21:54:291
3199799882,63cyclictest8278-21ssh21:54:291
32000998766,15cyclictest9952-21apt-key21:03:472
31993998742,34cyclictest0-21swapper/020:03:430
32000998665,14cyclictest1916-21latency_hist20:43:462
32000998624,27cyclictest2768-21runrttasks22:39:002
31997998662,17cyclictest28841-21latency_hist22:28:451
31997998655,8cyclictest181rcu_preempt00:12:341
31997998649,12cyclictest181rcu_preempt22:04:001
31997998639,13cyclictest181rcu_preempt22:59:401
31997998639,13cyclictest181rcu_preempt22:59:401
31997998625,27cyclictest0-21swapper/122:54:121
31993998658,19cyclictest6657-21diskmemload23:36:390
31993998658,19cyclictest6657-21diskmemload23:36:390
32000998513,38cyclictest11376-40mandb23:48:472
31993998554,8cyclictest181rcu_preempt19:44:070
32000998423,26cyclictest352-21runrttasks22:09:022
32000998410,37cyclictest11161-21ssh22:53:422
31997998460,17cyclictest1-21systemd20:03:441
31993998444,9cyclictest181rcu_preempt23:30:250
32000998321,23cyclictest3538-21ssh21:45:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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