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2026-04-21 - 00:03

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 Apr 20, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2160421140,5sleep321608-21kernelversion07:19:493
2160421140,5sleep321608-21kernelversion07:19:493
2485991060,5rtkit-daemon2484-21rtkit-daemon07:33:550
2485991010,7rtkit-daemon0-21swapper/009:11:430
2485991010,7rtkit-daemon0-21swapper/009:11:430
315142830,3sleep041ktimersoftd/005:29:520
41212690,10sleep00-21swapper/007:41:020
2063399685,53cyclictest0-21swapper/007:34:490
248599670,7rtkit-daemon0-21swapper/008:37:300
248599670,7rtkit-daemon0-21swapper/008:37:300
2063399665,54cyclictest0-21swapper/008:39:240
2063399664,53cyclictest0-21swapper/007:14:420
231302656,11sleep20-21swapper/208:59:032
2064199654,53cyclictest0-21swapper/208:04:512
2064199654,53cyclictest0-21swapper/207:24:532
2064199653,55cyclictest0-21swapper/210:01:282
2064199653,53cyclictest0-21swapper/207:34:442
2064299644,52cyclictest0-21swapper/310:34:503
2064299644,29cyclictest0-21swapper/306:54:263
2064299643,52cyclictest13026-21cpuspeed_turbos10:19:303
2063399645,52cyclictest0-21swapper/007:47:260
2063399644,53cyclictest0-21swapper/008:49:540
2063399644,53cyclictest0-21swapper/007:59:420
2063399643,54cyclictest10025-21latency_hist05:54:280
2064299624,52cyclictest0-21swapper/310:24:403
20642996219,13cyclictest0-21swapper/310:14:293
2064199624,51cyclictest0-21swapper/209:39:222
2064199624,51cyclictest0-21swapper/209:34:462
20633996226,12cyclictest1419-21runrttasks09:14:340
2241326117,37sleep322547-21ls08:09:373
2064299614,51cyclictest0-21swapper/307:54:383
2064299614,51cyclictest0-21swapper/307:54:383
2064299614,50cyclictest7878-21missed_timers08:34:483
2064299614,50cyclictest7878-21missed_timers08:34:483
2064299614,30cyclictest0-21swapper/309:04:533
2064299613,50cyclictest0-21swapper/309:09:513
2064299613,50cyclictest0-21swapper/309:09:513
2064299613,50cyclictest0-21swapper/308:54:223
20642996117,26cyclictest0-21swapper/308:26:203
2064199614,50cyclictest0-21swapper/210:04:302
2064199614,50cyclictest0-21swapper/208:39:372
2064199613,50cyclictest0-21swapper/210:39:172
2064199613,50cyclictest0-21swapper/208:09:372
2064199613,50cyclictest0-21swapper/207:18:282
2064199612,52cyclictest0-21swapper/209:17:132
2063799613,51cyclictest0-21swapper/108:14:341
2063399613,52cyclictest0-21swapper/009:54:380
145462613,51sleep00-21swapper/007:09:470
2064299605,50cyclictest0-21swapper/309:29:363
2064299604,48cyclictest9792-21yum-updatesd-he05:54:403
2064299604,48cyclictest0-21swapper/309:39:513
2064299604,48cyclictest0-21swapper/305:19:463
2064299604,48cyclictest0-21swapper/305:19:463
20642996021,14cyclictest0-21swapper/309:49:193
20642996020,14cyclictest0-21swapper/305:39:543
20642996014,27cyclictest0-21swapper/307:45:103
2064199604,49cyclictest0-21swapper/206:49:142
2064199603,50cyclictest0-21swapper/210:09:332
2064199603,50cyclictest0-21swapper/208:59:402
2064199603,49cyclictest0-21swapper/209:54:522
2063399605,31cyclictest0-21swapper/006:54:420
2063399604,50cyclictest0-21swapper/007:19:580
2063399604,50cyclictest0-21swapper/007:19:580
2063399604,49cyclictest0-21swapper/008:24:540
2063399604,49cyclictest0-21swapper/007:54:310
2063399604,49cyclictest0-21swapper/007:54:310
2063399603,51cyclictest0-21swapper/009:48:340
2063399603,51cyclictest0-21swapper/009:39:300
2063399603,50cyclictest0-21swapper/008:44:490
20633996027,12cyclictest0-21swapper/009:24:080
20633996021,14cyclictest0-21swapper/006:04:400
20633996017,23cyclictest0-21swapper/008:20:070
2064299595,48cyclictest0-21swapper/307:59:513
2064299595,29cyclictest0-21swapper/309:59:193
2064299595,28cyclictest0-21swapper/305:14:493
2064299595,25cyclictest0-21swapper/309:29:203
2064299594,49cyclictest20354-21gltestperf10:29:373
2064299594,49cyclictest20354-21gltestperf10:29:373
2064299594,49cyclictest0-21swapper/308:54:183
2064199594,48cyclictest0-21swapper/209:29:002
2064199593,49cyclictest0-21swapper/210:24:472
2064199593,49cyclictest0-21swapper/209:34:192
2064199593,49cyclictest0-21swapper/209:24:212
2064199593,48cyclictest0-21swapper/207:29:522
2064199592,51cyclictest0-21swapper/207:09:382
2063399594,49cyclictest4984-21taskset10:06:370
2063399594,49cyclictest0-21swapper/007:28:140
2063399594,48cyclictest0-21swapper/010:24:510
2063399594,48cyclictest0-21swapper/010:19:290
2063399594,48cyclictest0-21swapper/010:04:180
2063399593,50cyclictest0-21swapper/009:52:590
2063399593,49cyclictest0-21swapper/008:05:400
2063399593,48cyclictest0-21swapper/009:24:510
20633995928,13cyclictest1419-21runrttasks09:03:290
274162583,10sleep30-21swapper/309:52:343
236432582,9sleep20-21swapper/209:46:002
2064299585,34cyclictest0-21swapper/306:29:553
2064299585,29cyclictest0-21swapper/307:09:243
2064299585,29cyclictest0-21swapper/306:04:523
2064299585,28cyclictest0-21swapper/310:04:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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