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2026-03-21 - 05:50
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Sat Mar 21, 2026 00:44:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1035521150,8sleep010359-21cat22:19:540
1035521150,8sleep010359-21cat22:19:540
1618621040,8sleep20-21swapper/223:24:372
281642990,6sleep30-21swapper/319:19:543
22502999477,9cyclictest0-21swapper/123:29:531
22497999169,14cyclictest7254-21kworker/u17:019:54:490
22497999169,14cyclictest7254-21kworker/u17:019:54:490
22502999071,11cyclictest297-21systemd-logind19:09:531
22497999064,17cyclictest14030-21apt-key20:14:540
2249799898,72cyclictest22864-21modprobe23:35:120
2249799898,72cyclictest22864-21modprobe23:35:120
22502998870,9cyclictest0-21swapper/121:40:201
22502998864,18cyclictest12682-21latency_hist21:29:521
221182876,61sleep10-21swapper/119:01:321
2252299865,50cyclictest0-21swapper/323:54:513
2252299865,50cyclictest0-21swapper/323:54:513
22514998662,15cyclictest30134-21diskmemload22:40:062
22514998662,15cyclictest30134-21diskmemload22:40:062
22497998659,19cyclictest18630-21timerandwakeup00:21:170
22514998566,13cyclictest2480-21ssh23:00:222
22514998561,17cyclictest4056-21cut19:44:522
22497998560,17cyclictest22519-21latency_hist19:04:530
22514998463,15cyclictest26197-21latency_hist00:34:522
22502998438,37cyclictest10128-21grep20:00:271
22497998465,13cyclictest21590-21ssh21:44:500
22497998464,14cyclictest297-21systemd-logind20:54:500
22514998360,15cyclictest25458-21sh23:39:492
22514998360,15cyclictest25458-21sh23:39:492
22514998359,11cyclictest181rcu_preempt19:19:532
2249799833,62cyclictest2345-21ntp_states23:00:190
22502998261,14cyclictest3682-21kworker/u17:2+events_unbound22:34:491
22502998261,14cyclictest3682-21kworker/u17:2+events_unbound22:34:491
2250299823,64cyclictest19872-21ssh23:30:221
2250299823,64cyclictest19872-21ssh23:30:221
22497998251,13cyclictest181rcu_preempt22:04:130
22502998148,24cyclictest614-21kworker/u18:2+nfsiod21:19:261
22497998147,25cyclictest0-21swapper/022:35:100
14742810,8sleep01478-21sendmail_mailqu19:35:220
14742810,8sleep01478-21sendmail_mailqu19:35:220
22514998063,11cyclictest22488-21cyclictest23:55:222
22502998062,11cyclictest0-21swapper/120:19:491
22497998041,13cyclictest181rcu_preempt22:19:560
2249799803,38cyclictest19981-21sshd23:31:070
2249799803,38cyclictest19981-21sshd23:31:070
22497998026,34cyclictest31520-21grep21:05:260
2250299793,67cyclictest17399-21apt-get00:20:081
22497997955,19cyclictest8522-21kworker/u18:0+events_unbound22:59:490
22497997954,17cyclictest22488-21cyclictest22:44:530
22497997954,17cyclictest22488-21cyclictest22:44:530
22497997940,16cyclictest181rcu_preempt20:46:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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