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2026-09-15 - 16:23

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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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 rack1slot6s.osadl.org (updated Tue Sep 15, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
47119910836,10cyclictest8523-21aten_r1power_po08:32:090
4716999925,17cyclictest0-21swapper/209:17:212
219499980,5rtkit-daemon2193-21rtkit-daemon07:27:183
471799937,62cyclictest0-21swapper/310:12:113
471799934,67cyclictest0-21swapper/309:39:523
471799917,7cyclictest107550irq/46-eth008:56:573
471799914,14cyclictest0-21swapper/307:36:593
471799904,63cyclictest0-21swapper/308:27:253
219499900,5rtkit-daemon2193-21rtkit-daemon08:35:303
471799894,14cyclictest0-21swapper/309:33:233
471799893,49cyclictest0-21swapper/309:02:363
471799884,71cyclictest1227-21runrttasks07:37:123
471799884,61cyclictest27780-21timerandwakeup10:37:243
471799884,61cyclictest0-21swapper/310:27:213
471799883,63cyclictest0-21swapper/310:24:123
471799883,61cyclictest4968-21ssh09:15:013
471799883,55cyclictest18671ssh09:11:113
471799874,64cyclictest0-21swapper/308:24:123
471799874,61cyclictest0-21swapper/307:51:323
471799873,9cyclictest10349-21ntpdc09:22:223
471799873,9cyclictest10349-21ntpdc09:22:223
4716998722,16cyclictest0-21swapper/208:12:252
471799864,60cyclictest0-21swapper/308:16:563
471799864,12cyclictest0-21swapper/309:57:143
471799863,60cyclictest0-21swapper/310:20:003
4717998617,49cyclictest0-21swapper/310:07:213
4717998611,52cyclictest0-21swapper/308:36:593
4717998611,52cyclictest0-21swapper/308:36:593
471799854,8cyclictest22265-21ssh09:42:063
471799854,63cyclictest0-21swapper/309:47:233
471799854,61cyclictest0-21swapper/307:12:213
471799854,58cyclictest0-21swapper/310:53:253
471799853,60cyclictest0-21swapper/308:19:033
471799853,10cyclictest24860-21munin-node08:57:323
4717998519,44cyclictest0-21swapper/308:01:243
4717998519,44cyclictest0-21swapper/308:01:243
4717998518,52cyclictest0-21swapper/308:02:333
4717998514,55cyclictest5416-21nscd06:17:023
219499850,4rtkit-daemon2193-21rtkit-daemon06:37:273
471799845,9cyclictest107550irq/46-eth010:47:143
471799844,12cyclictest0-21swapper/308:42:223
471799844,12cyclictest0-21swapper/307:43:373
471799843,60cyclictest0-21swapper/310:03:273
471799843,60cyclictest0-21swapper/310:03:273
471799843,60cyclictest0-21swapper/309:17:033
471799843,10cyclictest25332-21latency08:07:223
471799843,10cyclictest14790-21df07:52:153
256312840,6sleep025634-21fschecks_time08:57:150
471799839,52cyclictest0-21swapper/310:33:093
471799834,62cyclictest0-21swapper/310:43:353
471799834,62cyclictest0-21swapper/310:43:353
471799834,14cyclictest0-21swapper/309:27:093
4717998312,63cyclictest0-21swapper/307:07:193
471799827,55cyclictest12063-21needreboot06:47:283
471799824,61cyclictest0-21swapper/309:56:273
471799824,11cyclictest0-21swapper/306:03:373
471799817,8cyclictest107550irq/46-eth005:57:213
471799813,8cyclictest15392-21sh06:57:003
471799813,12cyclictest0-21swapper/306:57:193
4717998113,52cyclictest107550irq/46-eth005:47:173
4717998113,52cyclictest107550irq/46-eth005:47:173
219499810,4rtkit-daemon2193-21rtkit-daemon05:35:003
471799803,9cyclictest1481-21tr06:27:153
471799803,69cyclictest0-21swapper/308:47:093
471799783,12cyclictest0-21swapper/307:02:133
471799783,12cyclictest0-21swapper/306:22:283
471799783,11cyclictest0-21swapper/306:17:163
4717997817,43cyclictest5615-21runrttasks06:34:043
4717997817,43cyclictest5615-21runrttasks06:34:043
471799774,9cyclictest5511-21diskstats05:27:223
471799774,52cyclictest0-21swapper/305:37:273
471799754,12cyclictest0-21swapper/305:42:373
471799743,11cyclictest0-21swapper/307:20:203
471799743,11cyclictest0-21swapper/307:20:203
471799733,8cyclictest28152-21diskstats07:22:163
471499736,59cyclictest0-21swapper/107:32:141
4717997118,37cyclictest0-21swapper/306:42:223
471199713,60cyclictest0-21swapper/009:02:070
471799704,13cyclictest0-21swapper/305:57:043
471799703,9cyclictest24863-21gltestperf06:07:223
471499704,58cyclictest0-21swapper/107:37:321
471199704,58cyclictest0-21swapper/009:27:140
471699684,55cyclictest0-21swapper/207:51:542
471499684,57cyclictest0-21swapper/110:14:331
471499684,57cyclictest0-21swapper/109:27:261
471499684,57cyclictest0-21swapper/108:37:231
471499684,57cyclictest0-21swapper/108:37:231
471499684,55cyclictest0-21swapper/110:52:101
219499680,5rtkit-daemon2193-21rtkit-daemon07:28:402
471799675,7cyclictest0-21swapper/305:27:043
471499673,58cyclictest0-21swapper/108:02:151
4716996613,28cyclictest0-21swapper/210:42:072
4716996613,28cyclictest0-21swapper/210:42:072
471499664,55cyclictest0-21swapper/109:12:301
471499664,54cyclictest0-21swapper/110:27:241
219499660,4rtkit-daemon2193-21rtkit-daemon08:11:082
471499655,52cyclictest8468-21fschecks_time07:42:171
471499655,52cyclictest0-21swapper/109:57:101
471499653,54cyclictest0-21swapper/110:07:171
219499650,5rtkit-daemon2193-21rtkit-daemon10:21:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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