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2026-04-23 - 17:01

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 Thu Apr 23, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
966921000,8sleep0942899cyclictest05:06:500
942899983,23cyclictest0-21swapper/009:26:550
942899974,38cyclictest0-21swapper/009:21:420
248599940,6rtkit-daemon0-21swapper/108:18:081
942899934,37cyclictest0-21swapper/009:48:210
943199923,67cyclictest10890-21cpuspeed_turbos09:41:442
9428999138,10cyclictest24308-21tr05:36:530
9428999138,10cyclictest24308-21tr05:36:530
942899913,41cyclictest0-21swapper/008:35:360
942899913,39cyclictest0-21swapper/009:01:460
943199904,66cyclictest28746-21ssh10:06:542
943199904,56cyclictest0-21swapper/208:35:292
942899904,22cyclictest0-21swapper/007:18:500
942899903,36cyclictest19312-21ssh09:06:410
77002900,6sleep17702-21df_abs09:36:441
943199894,71cyclictest0-21swapper/208:41:522
942899895,36cyclictest0-21swapper/007:42:070
942899895,36cyclictest0-21swapper/007:42:070
942899894,41cyclictest0-21swapper/010:27:190
942899894,13cyclictest0-21swapper/007:12:130
942899883,36cyclictest0-21swapper/008:21:420
943199876,61cyclictest23010-21grep08:22:072
943199874,76cyclictest0-21swapper/208:48:472
942899879,21cyclictest0-21swapper/010:32:080
942899879,21cyclictest0-21swapper/010:32:080
942899874,39cyclictest0-21swapper/009:51:590
942899874,39cyclictest0-21swapper/009:51:590
942899874,35cyclictest0-21swapper/005:51:510
942899873,38cyclictest0-21swapper/007:26:590
9428998727,14cyclictest0-21swapper/007:32:050
943199865,73cyclictest0-21swapper/207:40:202
943199864,75cyclictest0-21swapper/209:46:402
943199864,75cyclictest0-21swapper/206:51:552
943199864,50cyclictest0-21swapper/209:32:362
943199863,63cyclictest0-21swapper/210:11:422
943199863,49cyclictest0-21swapper/208:26:452
943199863,49cyclictest0-21swapper/208:26:452
943199862,64cyclictest0-21swapper/209:58:272
942899865,38cyclictest0-21swapper/008:57:040
942899863,43cyclictest0-21swapper/009:35:080
943199857,60cyclictest0-21swapper/207:21:502
943199856,58cyclictest0-21swapper/207:47:092
943199854,74cyclictest0-21swapper/206:06:492
943199854,63cyclictest0-21swapper/209:26:582
943199854,62cyclictest0-21swapper/209:51:512
943199854,62cyclictest0-21swapper/209:51:512
943199853,74cyclictest7262-21ssh08:01:042
942899853,20cyclictest0-21swapper/005:12:110
943199844,73cyclictest0-21swapper/209:04:182
943199844,73cyclictest0-21swapper/207:16:472
943199844,73cyclictest0-21swapper/206:31:582
943199844,72cyclictest0-21swapper/207:45:552
943199844,72cyclictest0-21swapper/207:45:552
943199844,49cyclictest0-21swapper/208:11:442
943199842,63cyclictest0-21swapper/207:32:232
943199835,71cyclictest0-21swapper/209:17:362
943199834,72cyclictest0-21swapper/208:37:012
943199834,72cyclictest0-21swapper/207:53:372
943199834,71cyclictest0-21swapper/209:11:582
943199834,71cyclictest0-21swapper/209:11:582
943199834,60cyclictest0-21swapper/209:07:042
943199833,73cyclictest8323-21tune2fs08:01:512
943199833,72cyclictest0-21swapper/208:21:062
943199833,62cyclictest13748-21grep08:56:562
942899834,22cyclictest0-21swapper/009:16:480
943199824,71cyclictest0-21swapper/206:06:372
943199824,61cyclictest0-21swapper/207:11:512
943199823,65cyclictest0-21swapper/210:31:352
943199823,65cyclictest0-21swapper/210:31:352
943199823,63cyclictest9510-21grep10:26:472
248599820,6rtkit-daemon2484-21rtkit-daemon05:06:462
943199814,70cyclictest0-21swapper/209:36:342
943199813,61cyclictest0-21swapper/209:22:312
248599810,4rtkit-daemon2484-21rtkit-daemon07:30:402
943199804,70cyclictest24055-21munin-node10:02:012
943199804,70cyclictest0-21swapper/210:21:392
943199804,69cyclictest0-21swapper/205:27:052
943199803,63cyclictest0-21swapper/210:20:302
248599800,5rtkit-daemon2484-21rtkit-daemon08:07:092
943199794,69cyclictest0-21swapper/207:06:562
943199794,69cyclictest0-21swapper/207:06:562
248599790,5rtkit-daemon2484-21rtkit-daemon06:57:112
248599790,5rtkit-daemon2484-21rtkit-daemon05:55:512
248599790,4rtkit-daemon2484-21rtkit-daemon05:12:152
943199783,59cyclictest0-21swapper/208:53:092
9428997829,13cyclictest0-21swapper/010:11:540
248599780,4rtkit-daemon2484-21rtkit-daemon06:18:352
943199773,68cyclictest0-21swapper/205:36:562
943199773,68cyclictest0-21swapper/205:36:562
248599770,4rtkit-daemon2484-21rtkit-daemon06:22:352
248599770,4rtkit-daemon2484-21rtkit-daemon06:22:352
248599770,4rtkit-daemon2484-21rtkit-daemon05:32:152
248599770,4rtkit-daemon2484-21rtkit-daemon05:22:232
943199764,47cyclictest0-21swapper/206:12:022
943199764,44cyclictest0-21swapper/206:41:592
943199763,41cyclictest26350-21munin-node05:41:532
248599760,4rtkit-daemon2484-21rtkit-daemon05:47:372
943199753,64cyclictest1287-21snmpd06:39:322
943199753,39cyclictest16150-21df_inode06:26:522
943199744,54cyclictest0-21swapper/207:04:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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