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2026-05-18 - 20:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Mon May 18, 2026 12:45:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1871083999418,37cyclictest12-21ksoftirqd/011:40:010
1871083998479,3cyclictest1877255-21diskmemload10:05:020
1871083998017,40cyclictest12-21ksoftirqd/011:35:010
1871083997569,4cyclictest150-21pr/ttyS212:30:030
187108399751,43cyclictest0-21swapper/010:09:260
187108399751,43cyclictest0-21swapper/010:09:250
1871083997020,10cyclictest12-21ksoftirqd/009:10:000
1871083996965,2cyclictest0-21swapper/011:20:020
1871096996758,7cyclictest37-21ksoftirqd/307:40:033
187108399666,29cyclictest1918766-21ssh10:35:120
187108399654,24cyclictest12-21ksoftirqd/012:20:020
1871083996318,7cyclictest12-21ksoftirqd/011:12:500
1871083996318,10cyclictest1978811-21cron12:40:010
1871083996218,39cyclictest1871580-21munin-run07:20:010
1871083996148,7cyclictest16850irq/134-800000012:05:000
1871083996128,16cyclictest1885610-21ssh09:26:570
187108399612,50cyclictest1942814-21cat11:25:030
1871083996121,31cyclictest16850irq/134-800000010:33:230
1871083996119,8cyclictest12-21ksoftirqd/011:00:010
1871083996118,36cyclictest1-21systemd12:10:000
1871083996114,8cyclictest12-21ksoftirqd/008:20:030
1871088996014,11cyclictest131rcu_preempt11:40:011
1871083996056,2cyclictest0-21swapper/008:25:010
1871083996039,15cyclictest3467602-21systemd-journal10:50:350
1871083996031,13cyclictest1912455-21ssh10:22:170
1871083996011,10cyclictest12-21ksoftirqd/008:05:000
1871083996010,14cyclictest12-21ksoftirqd/011:48:570
187108399592,41cyclictest1951524-21ssh11:43:260
1871083995917,7cyclictest12-21ksoftirqd/012:34:190
1871083995915,9cyclictest12-21ksoftirqd/009:59:470
187108399586,17cyclictest1923643-21sh10:45:080
1871083995815,9cyclictest12-21ksoftirqd/009:40:000
1871083995813,9cyclictest12-21ksoftirqd/010:15:050
1871096995722,25cyclictest37-21ksoftirqd/312:16:363
1871092995747,7cyclictest1862362-21kworker/2:011:42:192
1871092995747,6cyclictest1862362-21kworker/2:012:05:172
1871092995741,7cyclictest1862362-21kworker/2:012:30:262
187108399578,10cyclictest12-21ksoftirqd/011:30:010
1871083995740,9cyclictest1875690-21sendmail08:39:590
187108399572,19cyclictest1932565-21ssh11:04:060
1871092995641,6cyclictest1862362-21kworker/2:012:23:182
1871092995615,9cyclictest131rcu_preempt10:20:032
187108399562,28cyclictest1871118-21latency_hist07:10:020
1871083995613,7cyclictest12-21ksoftirqd/011:07:200
1871083995613,7cyclictest12-21ksoftirqd/010:25:230
1871083995610,8cyclictest12-21ksoftirqd/010:41:100
1871092995546,5cyclictest1862362-21kworker/2:011:58:362
1871092995539,7cyclictest1862362-21kworker/2:010:10:382
1871092995538,8cyclictest1874707-21kworker/2:311:30:262
187108899556,6cyclictest131rcu_preempt12:09:441
187108399558,12cyclictest12-21ksoftirqd/011:53:370
1871083995541,9cyclictest1899048-21munin-plugin-st09:55:000
1871083995527,12cyclictest1964823-21ssh12:10:330
1871083995512,7cyclictest12-21ksoftirqd/009:15:030
1871092995446,5cyclictest1862362-21kworker/2:007:45:012
1871092995445,6cyclictest1862362-21kworker/2:009:10:282
1871092995445,5cyclictest1862362-21kworker/2:010:39:422
187108899541,5cyclictest131rcu_preempt11:01:471
187108399547,18cyclictest1969569-21ssh12:20:260
187108399547,16cyclictest1884682-21cat09:25:020
1871083995442,6cyclictest16950irq/224-800000007:55:010
1871083995442,6cyclictest16950irq/224-800000007:55:000
1871083995424,14cyclictest1906654-21ssh10:10:080
1871083995415,7cyclictest12-21ksoftirqd/009:41:100
1871092995345,5cyclictest1862362-21kworker/2:012:17:362
1871092995345,5cyclictest1862362-21kworker/2:011:54:442
1871092995345,5cyclictest1862362-21kworker/2:007:40:022
1871092995344,7cyclictest1862362-21kworker/2:008:40:002
1871092995344,5cyclictest1874707-21kworker/2:311:29:182
1871092995344,5cyclictest1862362-21kworker/2:010:01:062
1871092995343,7cyclictest1874707-21kworker/2:311:11:202
187108899534,5cyclictest131rcu_preempt09:20:001
187108399538,5cyclictest131rcu_preempt09:18:510
187108399533,44cyclictest1876763-21unin-run09:00:010
1871092995244,5cyclictest1874707-21kworker/2:311:19:282
1871092995244,5cyclictest1874707-21kworker/2:311:07:202
1871092995244,5cyclictest1874707-21kworker/2:309:59:142
1871092995244,5cyclictest1874707-21kworker/2:309:39:032
1871092995244,5cyclictest1874707-21kworker/2:309:30:232
1871092995243,6cyclictest1862362-21kworker/2:011:46:092
1871092995243,6cyclictest1862362-21kworker/2:010:42:462
1871092995243,6cyclictest1862362-21kworker/2:010:26:012
1871092995243,5cyclictest1862362-21kworker/2:012:26:302
1871092995242,7cyclictest1862362-21kworker/2:007:58:562
1871092995241,7cyclictest1862362-21kworker/2:010:07:432
1871092995241,7cyclictest1862362-21kworker/2:010:07:422
1871092995238,5cyclictest1874707-21kworker/2:309:40:032
1871088995235,13cyclictest3467602-21systemd-journal12:15:001
1871088995213,6cyclictest131rcu_preempt11:05:081
1871083995226,11cyclictest1896218-21ssh09:48:570
1871083995226,11cyclictest1896218-21ssh09:48:570
1871083995214,10cyclictest0-21swapper/009:32:060
187109299518,39cyclictest291rcuc/208:20:022
1871092995144,4cyclictest1874707-21kworker/2:309:17:452
1871092995143,5cyclictest1874707-21kworker/2:311:20:162
1871092995143,5cyclictest1874707-21kworker/2:309:45:082
1871092995143,5cyclictest1874707-21kworker/2:309:45:072
1871092995143,5cyclictest1874707-21kworker/2:309:22:522
1871092995143,5cyclictest1862362-21kworker/2:012:10:252
1871092995143,5cyclictest1862362-21kworker/2:010:33:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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