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2026-05-15 - 07:05

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 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 Fri May 15, 2026 00:45:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
715328998624,17cyclictest815456-21ssh00:24:391
715328998524,20cyclictest767861-21ssh22:45:371
715324998337,29cyclictest779006-21ssh23:09:080
715324998226,39cyclictest728421-21ssh21:23:590
71532499815,8cyclictest0-21swapper/000:00:010
71532499815,8cyclictest0-21swapper/000:00:000
715324998014,16cyclictest808836-21ssh00:10:370
715328997924,18cyclictest788593-21sh23:28:571
715324997917,6cyclictest16850irq/134-800000022:58:250
715328997827,13cyclictest0-21swapper/123:07:491
715324997827,47cyclictest757267-21ssh22:23:570
71532499782,6cyclictest724041-21unin-run21:15:010
71532499782,6cyclictest724041-21unin-run21:15:010
715324997822,51cyclictest758398-21ssh22:26:040
71532499781,14cyclictest743376-21latency_hist21:55:010
715328997728,15cyclictest740830-21ssh21:49:501
715328997724,17cyclictest743841-21ssh21:55:511
715324997720,39cyclictest743968-21ssh21:56:070
715328997632,15cyclictest731098-21ssh21:29:491
715328997631,15cyclictest760720-21ssh22:30:441
715328997631,15cyclictest760720-21ssh22:30:431
715328997622,15cyclictest765258-21ssh22:40:091
715328997618,19cyclictest742408-21ssh21:53:021
715324997626,45cyclictest812329-21ssh00:18:000
71532499761,59cyclictest749645-21ssh22:07:570
715328997535,14cyclictest717847-21sendmail-mta19:59:401
715328997531,8cyclictest775199-21ssh23:00:561
715328997524,14cyclictest811987-21ssh00:17:181
715328997522,15cyclictest722506-21ssh21:11:321
715328997522,15cyclictest722506-21ssh21:11:311
715328997520,16cyclictest818550-21ssh00:30:371
715324997519,15cyclictest774852-21ssh23:00:040
71532499751,57cyclictest798027-21ssh23:48:270
715328997426,17cyclictest735327-21rm21:38:281
715328997426,11cyclictest747114-21ssh22:02:431
715328997422,20cyclictest772634-21ssh22:55:381
715328997422,14cyclictest810295-21ssh00:13:561
715324997418,43cyclictest16850irq/134-800000022:51:350
715324997417,6cyclictest16850irq/134-800000000:27:030
715324997417,6cyclictest16850irq/134-800000000:27:020
71532499741,55cyclictest0-21swapper/022:40:270
715328997332,16cyclictest725641-21ssh21:18:131
715328997323,14cyclictest751197-21ssh22:11:011
715328997322,15cyclictest759300-21ssh22:28:041
715328997320,18cyclictest721517-21diskmemload23:32:001
715324997334,35cyclictest16950irq/224-800000020:12:100
715324997329,27cyclictest785833-21ssh23:23:090
715324997329,26cyclictest792713-21ssh23:37:200
71532499732,5cyclictest815634-21munin-run00:24:590
715324997226,29cyclictest735340-21ssh21:38:280
71532499721,64cyclictest805918-21munin-run00:04:590
715324997211,5cyclictest16850irq/134-800000023:33:310
715328997121,17cyclictest771313-21ssh22:53:021
715328997120,14cyclictest793260-21ssh23:38:421
715328997119,18cyclictest738418-21ssh21:44:481
715328997119,14cyclictest799155-21ssh23:50:301
715324997127,27cyclictest753471-21ssh22:15:500
71532499712,6cyclictest764998-21munin-run22:40:020
715324997126,28cyclictest747522-21ssh22:03:420
715328997022,14cyclictest749983-21ssh22:08:491
715324997021,44cyclictest819023-21ssh00:31:430
71532499701,64cyclictest738589-21latency_hist21:45:010
715328996922,14cyclictest756727-21ssh22:22:401
715328996920,14cyclictest754428-21ssh22:17:571
715324996925,40cyclictest751550-21ssh22:11:560
715328996825,12cyclictest763720-21ssh22:37:091
715328996820,19cyclictest733245-21ssh21:34:101
715324996824,40cyclictest767752-21ssh22:45:250
71532499681,62cyclictest806393-21ssh00:05:320
715328996752,12cyclictest796895-21ssh23:45:571
715328996729,6cyclictest820926-21ssh00:35:331
715328996729,6cyclictest820926-21ssh00:35:331
715328996726,13cyclictest780464-21ssh23:12:041
715328996724,13cyclictest0-21swapper/100:28:491
715328996724,13cyclictest0-21swapper/100:28:481
715324996720,32cyclictest799702-21ssh23:51:480
715324996718,32cyclictest821084-21ssh00:35:520
715324996718,32cyclictest821084-21ssh00:35:520
71532499671,47cyclictest0-21swapper/021:00:020
71532499671,2cyclictest0-21swapper/021:32:470
715328996629,13cyclictest786243-21sh23:24:151
715328996624,13cyclictest721517-21diskmemload00:06:531
71532499663,5cyclictest784256-21munin-run23:20:020
71532499661,31cyclictest0-21swapper/021:26:240
71532499661,17cyclictest717329-21sshd19:46:430
715328996522,14cyclictest364-21snmpd19:41:181
715328996451,10cyclictest804235-21ssh00:01:061
715328996425,11cyclictest0-21swapper/123:43:331
715328996425,11cyclictest0-21swapper/123:43:331
715328996422,13cyclictest728051-21ssh21:23:131
715324996317,38cyclictest309-21in:imuxsock20:05:000
71532499631,5cyclictest3467602-21systemd-journal19:15:260
715328996249,10cyclictest801824-21ssh23:56:081
715328996249,10cyclictest801824-21ssh23:56:071
715328996243,15cyclictest715528-21munin-run19:15:011
71532499623,14cyclictest717873-21munin-run20:00:000
715324996225,32cyclictest794764-21ssh23:41:270
715324996225,32cyclictest794764-21ssh23:41:260
715324996225,32cyclictest780054-21ssh23:11:000
715324996222,23cyclictest726065-21ssh21:19:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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