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2026-07-06 - 14:36

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Mon Jul 06, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27356997913,59cyclictest41ktimersoftd/010:19:150
2735699744,64cyclictest0-21swapper/010:34:000
2736299734,61cyclictest0-21swapper/310:48:393
2736299724,61cyclictest0-21swapper/311:13:553
2735699704,58cyclictest0-21swapper/007:04:000
2736299695,54cyclictest12850-21munin-run11:33:373
146792680,2sleep2281ktimersoftd/210:48:262
2735699674,56cyclictest0-21swapper/009:44:140
2735699674,55cyclictest0-21swapper/009:29:120
2735699674,55cyclictest0-21swapper/008:54:110
10372673,11sleep10-21swapper/108:52:281
27362996648,12cyclictest0-21swapper/309:51:023
2735699665,53cyclictest0-21swapper/011:28:550
2735699664,55cyclictest0-21swapper/011:03:380
2735699664,54cyclictest0-21swapper/010:14:030
2735699664,54cyclictest0-21swapper/008:34:080
2735699664,54cyclictest0-21swapper/008:34:080
27362996530,20cyclictest24859-21ls10:14:063
27361996538,9cyclictest8628-21ssh09:03:432
2735699655,38cyclictest0-21swapper/010:25:180
2735699654,54cyclictest0-21swapper/011:18:590
2735699654,53cyclictest0-21swapper/011:48:540
2736299645,52cyclictest0-21swapper/309:28:573
2736299645,51cyclictest14387-21ssh09:58:593
2736299645,51cyclictest14387-21ssh09:58:593
2735699644,54cyclictest0-21swapper/009:03:110
2735699644,53cyclictest0-21swapper/010:39:060
2735699644,53cyclictest0-21swapper/010:39:060
2735699644,52cyclictest0-21swapper/011:14:420
2735699644,52cyclictest0-21swapper/009:58:550
2735699644,52cyclictest0-21swapper/009:58:550
2735699644,51cyclictest0-21swapper/011:24:120
2735699643,56cyclictest0-21swapper/011:53:560
2735699643,56cyclictest0-21swapper/011:53:560
2735699643,55cyclictest0-21swapper/011:44:390
2735699643,54cyclictest0-21swapper/010:29:120
255152643,13sleep20-21swapper/208:39:192
93332634,50sleep20-21swapper/208:09:082
2736299636,49cyclictest0-21swapper/308:54:103
2736299635,50cyclictest20921-21iostat_ios11:43:593
2736299635,50cyclictest20715-21taskset10:55:503
27361996338,11cyclictest0-21swapper/211:33:342
2736199633,52cyclictest0-21swapper/207:44:042
2735699635,51cyclictest0-21swapper/009:21:030
2735699635,49cyclictest18693-21cpuspeed_turbos10:53:520
2735699634,53cyclictest0-21swapper/008:50:540
2735699634,51cyclictest0-21swapper/009:09:390
2735699634,51cyclictest0-21swapper/008:39:010
27356996318,14cyclictest0-21swapper/012:01:420
2736299625,50cyclictest0-21swapper/310:37:143
2735699625,49cyclictest0-21swapper/011:04:010
2735699625,49cyclictest0-21swapper/009:04:140
2735699625,14cyclictest0-21swapper/009:55:270
2735699624,51cyclictest0-21swapper/011:34:080
2735699624,51cyclictest0-21swapper/010:52:470
2735699624,51cyclictest0-21swapper/009:35:490
2735699624,50cyclictest0-21swapper/008:09:070
2735699624,50cyclictest0-21swapper/006:58:480
2735699624,49cyclictest0-21swapper/009:48:580
2735699624,27cyclictest0-21swapper/009:23:570
27361996125,12cyclictest0-21swapper/209:06:212
2735699615,14cyclictest0-21swapper/007:23:470
2735699615,14cyclictest0-21swapper/007:23:470
2735699614,51cyclictest0-21swapper/010:47:140
2735699614,51cyclictest0-21swapper/009:16:250
2735699614,49cyclictest0-21swapper/007:13:590
2735699614,49cyclictest0-21swapper/006:38:490
2735699614,29cyclictest0-21swapper/008:28:560
60742603,49sleep10-21swapper/111:23:381
49282603,13sleep20-21swapper/211:19:272
2736299605,48cyclictest0-21swapper/309:14:473
2736299604,12cyclictest0-21swapper/311:18:523
27362996020,33cyclictest1227-21runrttasks08:04:333
27361996028,13cyclictest0-21swapper/211:28:382
2735699605,48cyclictest0-21swapper/007:53:590
2735699605,26cyclictest0-21swapper/010:08:590
2735699605,14cyclictest0-21swapper/010:06:140
2735699604,49cyclictest0-21swapper/009:39:570
2735699604,28cyclictest0-21swapper/006:44:030
2735699604,14cyclictest0-21swapper/008:43:500
2736299596,46cyclictest0-21swapper/311:09:203
2736299595,47cyclictest0-21swapper/311:56:203
2736299595,47cyclictest0-21swapper/311:56:203
2736299595,47cyclictest0-21swapper/311:50:363
2736299595,47cyclictest0-21swapper/309:27:323
2736299595,47cyclictest0-21swapper/308:48:383
27362995941,13cyclictest0-21swapper/309:05:243
2736299592,51cyclictest0-21swapper/310:04:213
27361995930,10cyclictest1124-21snmpd10:06:572
2735699595,48cyclictest0-21swapper/011:12:000
2735699594,48cyclictest0-21swapper/011:39:100
2735699594,30cyclictest0-21swapper/008:16:380
27362995841,12cyclictest0-21swapper/309:09:003
27362995839,13cyclictest0-21swapper/312:03:183
27361995821,24cyclictest0-21swapper/211:44:442
27361995815,35cyclictest2715-21gltestperf08:54:032
2735699584,27cyclictest0-21swapper/008:21:390
2736299575,46cyclictest0-21swapper/309:55:313
2736299575,45cyclictest0-21swapper/311:27:023
27362995740,11cyclictest1547-21nscd06:39:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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