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2026-07-24 - 09:42

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 Fri Jul 24, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
277229910041,12cyclictest0-21swapper/020:17:490
2772599944,28cyclictest0-21swapper/323:07:253
2772599944,28cyclictest0-21swapper/323:07:253
2772599933,74cyclictest0-21swapper/319:52:313
2772599924,28cyclictest0-21swapper/323:32:383
2772599924,26cyclictest0-21swapper/321:02:163
2772599924,26cyclictest0-21swapper/321:02:163
219499910,4rtkit-daemon20760-21needreboot22:42:352
2772599904,26cyclictest0-21swapper/320:23:553
2772599904,26cyclictest0-21swapper/320:23:553
2772599904,25cyclictest0-21swapper/321:12:263
2772599894,27cyclictest0-21swapper/320:27:453
2772599894,26cyclictest0-21swapper/319:42:333
2772599894,26cyclictest0-21swapper/319:42:333
2772599894,25cyclictest0-21swapper/323:43:593
2772599894,25cyclictest0-21swapper/323:43:593
2772599888,22cyclictest0-21swapper/321:52:143
2772599884,27cyclictest0-21swapper/322:03:113
2772599884,26cyclictest0-21swapper/321:30:523
27725998810,9cyclictest21519-21ssh20:17:383
2772599877,13cyclictest0-21swapper/321:42:273
2772599877,13cyclictest0-21swapper/321:42:273
27725998728,52cyclictest4354-21needreboot22:17:383
27725998727,54cyclictest613-21timerwakeupswit19:32:503
27725998726,53cyclictest3153-21cpuspeed_turbos18:32:363
27725998712,7cyclictest311161ssh22:57:453
2772599864,74cyclictest0-21swapper/323:02:353
2772599864,26cyclictest0-21swapper/322:39:573
2772599864,13cyclictest0-21swapper/320:02:293
2772599858,21cyclictest0-21swapper/321:19:003
2772599855,23cyclictest0-21swapper/320:48:443
2772599854,73cyclictest0-21swapper/321:56:143
2772599854,27cyclictest0-21swapper/323:23:553
2772599854,26cyclictest0-21swapper/320:58:363
2772599853,26cyclictest0-21swapper/323:17:093
2772599853,26cyclictest0-21swapper/322:44:123
2772599844,28cyclictest0-21swapper/319:37:443
2772599844,27cyclictest0-21swapper/320:41:583
2772599844,26cyclictest0-21swapper/320:53:253
2772599843,74cyclictest0-21swapper/322:54:173
27725998427,50cyclictest10586-21gltestperf22:27:323
27725998427,50cyclictest10586-21gltestperf22:27:323
27725998418,60cyclictest1227-21runrttasks22:00:383
2772599835,71cyclictest0-21swapper/323:41:273
2772599835,26cyclictest0-21swapper/322:27:123
2772599834,71cyclictest0-21swapper/322:48:483
2772599833,71cyclictest0-21swapper/320:35:223
2772599833,26cyclictest0-21swapper/320:42:353
2772599829,66cyclictest0-21swapper/322:12:413
2772599825,27cyclictest0-21swapper/319:03:103
2772599825,27cyclictest0-21swapper/319:03:103
2772599825,23cyclictest0-21swapper/321:08:323
2772599824,26cyclictest0-21swapper/321:26:253
2772599823,26cyclictest0-21swapper/321:51:263
27725998224,10cyclictest27022-21cpuspeed_turbos19:22:323
27725998216,13cyclictest0-21swapper/323:31:123
2772599818,13cyclictest0-21swapper/322:09:343
2772599814,26cyclictest0-21swapper/323:17:573
2772599813,25cyclictest0-21swapper/318:23:003
27725998127,8cyclictest13831-21gltestperf22:32:303
2772599804,25cyclictest0-21swapper/318:27:473
2772599804,13cyclictest0-21swapper/321:37:463
2772599804,12cyclictest0-21swapper/321:32:453
2772599794,26cyclictest0-21swapper/319:17:203
27725997928,44cyclictest16835-21idleruntime20:07:383
2772599783,27cyclictest0-21swapper/318:52:493
27725997821,12cyclictest0-21swapper/319:27:503
27725997817,10cyclictest20344-21gltestperf19:07:393
2772599774,12cyclictest0-21swapper/319:57:493
27725997721,10cyclictest28623-21fschecks_time18:17:393
27725997721,10cyclictest28623-21fschecks_time18:17:393
2772599765,22cyclictest0-21swapper/318:39:323
2772599764,65cyclictest0-21swapper/319:17:293
2772599764,22cyclictest0-21swapper/319:47:323
219499760,5rtkit-daemon2193-21rtkit-daemon22:36:502
2772599754,13cyclictest0-21swapper/318:42:333
2772599744,27cyclictest0-21swapper/318:48:073
27725997410,8cyclictest107550irq/46-eth020:12:473
2772599734,25cyclictest0-21swapper/318:57:323
2772499714,14cyclictest0-21swapper/223:17:282
2772499704,58cyclictest0-21swapper/220:40:362
2772499685,30cyclictest0-21swapper/218:32:212
2772399683,8cyclictest25856-21crond22:52:101
2772399674,56cyclictest25290-21ntpq20:22:461
2772399674,56cyclictest25290-21ntpq20:22:461
2772499665,53cyclictest0-21swapper/221:04:382
2772499665,53cyclictest0-21swapper/221:04:382
2772399664,56cyclictest0-21swapper/122:37:271
27722996628,30cyclictest3001-21sendmail_mailqu19:37:460
2772499656,51cyclictest0-21swapper/220:02:342
2772499655,53cyclictest0-21swapper/220:57:512
2772499655,31cyclictest0-21swapper/221:12:302
2772499654,54cyclictest0-21swapper/222:53:432
2772499654,53cyclictest0-21swapper/218:58:032
2772399654,54cyclictest0-21swapper/122:33:241
2772499645,30cyclictest0-21swapper/223:08:092
2772499645,30cyclictest0-21swapper/223:08:092
2772499644,52cyclictest0-21swapper/222:57:282
2772499644,50cyclictest20461-21diskmemload21:47:132
2772499644,50cyclictest20461-21diskmemload21:47:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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