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2026-05-21 - 00:29

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 May 20, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4886991024,57cyclictest0-21swapper/304:56:373
488699964,42cyclictest0-21swapper/307:16:303
488699944,84cyclictest27183-21fschecks_count05:26:353
488699944,65cyclictest0-21swapper/308:34:333
488699934,82cyclictest6193-21cut09:16:173
488699924,64cyclictest0-21swapper/309:31:593
488699924,62cyclictest9730-21open_inodes06:56:403
488699924,61cyclictest0-21swapper/307:36:043
488699923,65cyclictest0-21swapper/306:44:483
488699923,65cyclictest0-21swapper/306:44:483
4886999213,52cyclictest0-21swapper/307:10:233
4882999230,54cyclictest15029-21ssh09:27:241
4882999230,54cyclictest15029-21ssh09:27:241
488699915,71cyclictest0-21swapper/307:54:513
488699914,58cyclictest0-21swapper/308:38:303
488699913,80cyclictest3459-21sh09:59:053
4886999116,48cyclictest0-21swapper/307:14:593
488699904,60cyclictest0-21swapper/310:10:183
488699904,60cyclictest0-21swapper/310:10:183
488699904,59cyclictest0-21swapper/308:59:473
488699904,59cyclictest0-21swapper/308:17:563
488699904,59cyclictest0-21swapper/306:54:513
488699894,69cyclictest0-21swapper/307:49:493
488699894,57cyclictest0-21swapper/307:21:143
488699894,57cyclictest0-21swapper/307:21:143
488699889,68cyclictest16837-21runrttasks08:41:573
488699885,66cyclictest12935-21ssh07:01:353
488699885,61cyclictest0-21swapper/309:28:483
488699885,61cyclictest0-21swapper/309:28:483
488699883,55cyclictest0-21swapper/309:03:413
4886998818,64cyclictest5126-21unixbench_multi07:36:433
488699874,57cyclictest0-21swapper/308:12:123
488699865,73cyclictest2377-21iostat_ios08:21:323
488699865,50cyclictest0-21swapper/306:26:513
488699854,74cyclictest8596-21sh07:41:473
488699844,63cyclictest1419-21runrttasks08:50:233
488699844,63cyclictest1419-21runrttasks08:50:233
488699844,60cyclictest0-21swapper/309:21:183
488699834,66cyclictest0-21swapper/308:06:203
488699834,58cyclictest0-21swapper/310:02:293
66752820,4sleep121-21ksoftirqd/108:26:581
488699828,67cyclictest0-21swapper/309:51:423
488699824,70cyclictest27279-21ssh09:46:243
488699824,70cyclictest1501-21ls06:46:253
488699824,58cyclictest0-21swapper/308:05:093
488699824,58cyclictest0-21swapper/308:05:093
488699815,57cyclictest0-21swapper/308:54:093
488699814,71cyclictest0-21swapper/306:11:333
488699814,67cyclictest9647-21munin-run04:51:183
488699814,60cyclictest0-21swapper/307:26:283
488699814,59cyclictest0-21swapper/305:31:273
488699805,63cyclictest1419-21runrttasks09:14:243
488699804,67cyclictest0-21swapper/305:16:333
488699804,67cyclictest0-21swapper/305:16:333
4886998012,50cyclictest0-21swapper/306:06:243
4882998021,52cyclictest0-21swapper/108:16:271
4882998020,54cyclictest0-21swapper/107:53:531
488699795,9cyclictest6621-21yum08:26:453
488699793,8cyclictest24208-21aten_r1power_cu05:21:283
488699793,58cyclictest7457-21needreboot05:51:393
488699793,10cyclictest609-21seq09:06:353
4886997916,41cyclictest0-21swapper/309:39:463
4886997913,43cyclictest0-21swapper/307:57:173
488699786,50cyclictest0-21swapper/305:06:293
488699784,64cyclictest15462-21gltestperf05:01:373
488699784,48cyclictest0-21swapper/305:36:403
4882997830,41cyclictest1419-21runrttasks07:56:211
4882997819,32cyclictest107591ssh10:11:051
4882997819,32cyclictest107591ssh10:11:051
488699775,42cyclictest0-21swapper/305:41:293
488699774,65cyclictest12021-21crond04:56:173
488699774,64cyclictest0-21swapper/309:41:263
488699774,53cyclictest0-21swapper/306:16:343
488699774,46cyclictest0-21swapper/305:56:283
488699764,54cyclictest0-21swapper/304:41:313
488699763,65cyclictest3858-21munin-node05:46:423
4886997617,39cyclictest0-21swapper/306:36:403
4882997621,31cyclictest22679-21df_abs07:16:281
248599760,4rtkit-daemon2484-21rtkit-daemon09:58:132
488699754,49cyclictest0-21swapper/306:31:273
488699744,50cyclictest0-21swapper/306:01:323
488699744,50cyclictest0-21swapper/306:01:323
488699744,48cyclictest0-21swapper/306:21:493
488699733,8cyclictest19648-21cpuspeed05:11:303
4882997320,30cyclictest8462-21munin-node07:41:441
4882997317,50cyclictest0-21swapper/109:31:531
248599730,3rtkit-daemon0-21swapper/309:23:210
4882997223,42cyclictest26077-21munin-node07:21:271
4882997223,42cyclictest26077-21munin-node07:21:271
4882997221,44cyclictest1419-21runrttasks08:51:201
4882997214,51cyclictest0-21swapper/109:47:131
248599720,7rtkit-daemon0-21swapper/209:48:132
248599720,7rtkit-daemon0-21swapper/209:39:062
4882997122,42cyclictest275691rm08:59:141
4882997117,47cyclictest0-21swapper/108:21:161
4878997155,11cyclictest0-21swapper/009:33:370
4882997026,20cyclictest27791-21gltestperf08:11:281
4882997023,29cyclictest31846-21aten_r1power_po09:06:201
4882997016,30cyclictest0-21swapper/107:11:281
488699695,54cyclictest0-21swapper/304:41:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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