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2026-03-21 - 11:50
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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 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
22497997940,16cyclictest181rcu_preempt20:46:350
18902790,7sleep30-21swapper/322:05:183
18902790,7sleep30-21swapper/322:05:183
2249799789,56cyclictest15599-21apt20:19:490
2249799785,63cyclictest31409-21apt23:49:490
22497997849,19cyclictest6329-21sh00:00:270
22497997849,19cyclictest6329-21sh00:00:270
2249799783,36cyclictest17334-21date00:19:530
22522997736,24cyclictest22321-21chrt23:34:503
22522997736,24cyclictest22321-21chrt23:34:503
22514997763,10cyclictest22488-21cyclictest22:15:202
22514997763,10cyclictest22488-21cyclictest22:15:202
22514997761,11cyclictest4841-21ntp_offset19:45:192
22514997758,13cyclictest16855-21latency_hist00:19:532
22514997752,12cyclictest181rcu_preempt21:04:522
22502997759,9cyclictest0-21swapper/120:25:251
22502997757,14cyclictest29716-21latency_hist19:24:521
22502997757,14cyclictest29716-21latency_hist19:24:521
2250299773,64cyclictest10563-21ssh22:20:111
22497997754,16cyclictest30134-21diskmemload23:44:510
22497997727,17cyclictest181rcu_preempt00:30:410
2249799772,26cyclictest22574-21tune2fs20:40:110
2249799772,26cyclictest22574-21tune2fs20:40:110
22497997715,41cyclictest31408-21modprobe19:29:490
22497997715,41cyclictest31408-21modprobe19:29:490
22514997658,12cyclictest22310-21kernelversion21:45:172
22514997650,20cyclictest13642-21sh22:25:102
22514997617,36cyclictest23544-21timerwakeupswit19:05:232
22502997655,14cyclictest25295-21systemd-run20:49:501
22502997655,14cyclictest25295-21systemd-run20:49:501
22502997655,14cyclictest1-21systemd20:20:071
22502997650,17cyclictest26102-21sh22:45:251
22497997651,18cyclictest30134-21diskmemload21:55:130
2249799763,35cyclictest352-21runrttasks23:26:500
22514997557,12cyclictest12211-21unixbench_multi00:10:262
22514997556,12cyclictest19741-21idleruntime22:35:112
22514997555,14cyclictest6750-21latency_hist21:19:512
22514997550,19cyclictest13132-21munin-plugin-st22:24:492
22502997550,18cyclictest16084-21latency_hist22:29:521
22502997542,19cyclictest23653-21modprobe20:44:491
22502997542,19cyclictest23653-21modprobe20:44:491
22497997541,12cyclictest181rcu_preempt21:35:180
22497997535,7cyclictest181rcu_preempt22:10:260
22497997532,17cyclictest6854-21latency_hist21:19:520
22514997451,13cyclictest0-21swapper/223:29:542
22514997446,21cyclictest17211-21cut20:24:522
22502997456,12cyclictest7878-21if_eth019:55:131
2250299742,61cyclictest22809-21apt-get23:35:111
2250299742,61cyclictest22809-21apt-get23:35:111
22497997455,12cyclictest12822-21ssh21:29:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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