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2026-07-16 - 01:07

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 Wed Jul 15, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2194991000,4rtkit-daemon2193-21rtkit-daemon08:57:210
8499999819,60cyclictest475-21ssh09:10:342
8499999819,60cyclictest475-21ssh09:10:342
849999964,12cyclictest0-21swapper/209:05:392
849999954,71cyclictest0-21swapper/211:30:102
849999954,69cyclictest0-21swapper/210:30:042
8499999511,13cyclictest0-21swapper/211:15:422
8499999511,13cyclictest0-21swapper/211:15:422
849999944,69cyclictest0-21swapper/210:35:282
849999944,69cyclictest0-21swapper/210:35:282
849999944,69cyclictest0-21swapper/208:45:482
8499999418,56cyclictest0-21swapper/209:02:482
849999938,12cyclictest0-21swapper/208:39:412
849999938,12cyclictest0-21swapper/208:39:412
849999934,72cyclictest0-21swapper/208:55:382
849999925,12cyclictest1227-21runrttasks11:20:232
849999924,70cyclictest0-21swapper/210:05:392
849999924,66cyclictest0-21swapper/211:30:332
849999924,65cyclictest0-21swapper/211:07:122
849999924,14cyclictest0-21swapper/211:04:382
849999924,14cyclictest0-21swapper/209:24:332
849999924,13cyclictest0-21swapper/211:40:242
8499999218,56cyclictest14838-21ssh09:30:452
849999915,61cyclictest12431-21fschecks_time08:40:342
849999915,14cyclictest0-21swapper/209:15:432
8499999118,51cyclictest0-21swapper/207:10:492
8499999118,51cyclictest0-21swapper/207:10:492
849999904,77cyclictest30161-21grep10:40:442
849999904,72cyclictest0-21swapper/210:24:312
849999904,64cyclictest0-21swapper/211:50:262
849999904,64cyclictest0-21swapper/211:50:262
849999904,13cyclictest0-21swapper/209:40:252
849999904,13cyclictest0-21swapper/207:05:202
8499999010,69cyclictest0-21swapper/207:05:422
849999895,68cyclictest24062-21diskstats09:45:282
849999895,61cyclictest0-21swapper/210:45:392
849999894,63cyclictest0-21swapper/211:36:322
849999894,63cyclictest0-21swapper/210:34:322
849999894,63cyclictest0-21swapper/210:15:312
849999894,14cyclictest0-21swapper/210:00:022
849999894,14cyclictest0-21swapper/210:00:022
849999894,13cyclictest0-21swapper/209:35:452
849999893,20cyclictest1084-21lldpd06:54:382
849999885,63cyclictest0-21swapper/207:30:532
849999884,17cyclictest0-21swapper/210:04:432
849999884,14cyclictest0-21swapper/209:55:122
8499998822,45cyclictest0-21swapper/206:40:492
8499998812,10cyclictest0-21swapper/211:49:112
849999874,73cyclictest0-21swapper/211:10:392
849999874,68cyclictest0-21swapper/208:51:432
849999873,61cyclictest0-21swapper/208:27:192
219499870,5rtkit-daemon2193-21rtkit-daemon10:45:470
849999865,58cyclictest0-21swapper/210:55:322
849999864,67cyclictest0-21swapper/208:19:552
849999864,61cyclictest0-21swapper/210:14:522
849999864,61cyclictest0-21swapper/209:28:052
849999864,13cyclictest0-21swapper/208:00:302
849999864,11cyclictest4717-21ssh08:30:272
8499998616,48cyclictest0-21swapper/206:45:432
8499998615,9cyclictest32606-21tail07:15:302
8499998615,9cyclictest32606-21tail07:15:302
8499998610,61cyclictest0-21swapper/210:53:462
849999854,59cyclictest0-21swapper/208:15:172
849999854,12cyclictest0-21swapper/206:25:222
849999844,70cyclictest0-21swapper/208:05:492
101842830,6sleep00-21swapper/011:00:280
8500998129,46cyclictest0-21swapper/309:00:563
849999814,61cyclictest0-21swapper/207:20:542
849999814,56cyclictest0-21swapper/207:55:292
849999814,56cyclictest0-21swapper/207:55:292
219499810,4rtkit-daemon2193-21rtkit-daemon06:50:190
849999809,12cyclictest0-21swapper/206:35:442
8499998010,13cyclictest0-21swapper/207:50:402
219499800,5rtkit-daemon2193-21rtkit-daemon10:56:160
8500997926,46cyclictest0-21swapper/309:18:453
849999795,10cyclictest1227-21runrttasks06:27:152
849999794,67cyclictest0-21swapper/207:46:312
849999794,67cyclictest0-21swapper/207:40:302
849999794,67cyclictest0-21swapper/207:00:192
219499790,4rtkit-daemon2193-21rtkit-daemon07:14:330
219499790,4rtkit-daemon2193-21rtkit-daemon07:14:330
8500997827,43cyclictest0-21swapper/311:35:083
8500997826,44cyclictest0-21swapper/309:29:513
8500997823,47cyclictest0-21swapper/310:57:063
849999785,14cyclictest0-21swapper/207:36:572
849999783,21cyclictest32640-21ntpq08:20:462
8499997814,54cyclictest0-21swapper/207:30:192
219499780,4rtkit-daemon2193-21rtkit-daemon07:35:470
178302780,3sleep041ktimersoftd/010:24:450
8500997729,40cyclictest11672-21munin-node08:40:523
8500997728,18cyclictest0-21swapper/309:05:373
8500997726,45cyclictest0-21swapper/309:30:283
8500997725,44cyclictest16202-21cpuspeed_turbos06:40:333
8500997630,39cyclictest16239-21iostat08:45:373
8500997629,40cyclictest7949-21sort11:45:213
8500997626,41cyclictest0-21swapper/311:11:153
8500997625,43cyclictest0-21swapper/311:41:423
8500997623,45cyclictest7423-21chrt10:08:483
8500997621,40cyclictest0-21swapper/309:41:523
8499997630,39cyclictest11194-21aten2.4-expect06:30:332
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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