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2026-05-16 - 16:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot5s.osadl.org (updated Sat May 16, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27371992726,1cyclictest5780-1kworker/u9:110:33:532
27376992523,1cyclictest0-21swapper/310:40:493
2737699250,24cyclictest14447-21ssh10:57:253
27371992523,1cyclictest11960-21ssh10:27:202
2737199250,25cyclictest0-21swapper/211:24:452
2736999250,24cyclictest0-21swapper/112:27:081
2736999250,24cyclictest0-21swapper/110:57:111
27368992523,1cyclictest0-21swapper/011:38:060
2736899250,24cyclictest20682-21diskmemload12:36:330
2736899250,24cyclictest20682-21diskmemload09:51:320
2736899250,24cyclictest20682-21diskmemload09:32:440
2736899250,24cyclictest0-21swapper/011:34:460
27376992423,1cyclictest18045-21ssh10:03:473
27376992423,1cyclictest0-21swapper/311:45:303
2737699240,23cyclictest15893-21ssh10:30:463
2737699240,0cyclictest20682-21diskmemload12:19:393
27371992420,0cyclictest0-21swapper/209:23:452
27371992419,1cyclictest16526-21ssh11:27:252
2737199240,24cyclictest5139-21ssh10:49:452
2737199240,23cyclictest0-21swapper/209:46:012
2737199240,1cyclictest24267-21ssh11:34:452
27369992423,1cyclictest20682-21diskmemload11:41:591
27369992423,1cyclictest0-21swapper/111:59:171
27369992423,1cyclictest0-21swapper/109:48:431
27369992422,1cyclictest0-21swapper/109:27:171
27369992421,2cyclictest0-21swapper/112:30:561
2736999240,24cyclictest0-21swapper/111:11:081
2736999240,24cyclictest0-21swapper/109:30:211
2736999240,23cyclictest20682-21diskmemload10:35:301
2736999240,23cyclictest0-21swapper/111:18:541
2736999240,0cyclictest0-21swapper/111:26:001
2736999240,0cyclictest0-21swapper/109:20:591
27368992423,1cyclictest62550irq/127-eno110:30:500
27368992423,0cyclictest0-21swapper/009:55:370
27368992423,0cyclictest0-21swapper/009:24:330
2736899240,24cyclictest0-21swapper/010:11:360
2736899240,23cyclictest20682-21diskmemload12:20:450
2736899240,23cyclictest20682-21diskmemload11:26:560
2736899240,23cyclictest20682-21diskmemload09:36:270
2736899240,23cyclictest0-21swapper/012:32:360
2736899240,23cyclictest0-21swapper/012:06:480
2736899240,23cyclictest0-21swapper/011:13:210
2736899240,0cyclictest0-21swapper/011:46:420
27376992323,0cyclictest20682-21diskmemload10:36:403
27376992323,0cyclictest0-21swapper/312:35:343
27376992323,0cyclictest0-21swapper/312:33:433
27376992320,2cyclictest8588-21ssh11:21:123
2737699230,2cyclictest22810-21ssh10:07:333
2737699230,2cyclictest17892-21sh09:36:053
2737699230,23cyclictest20682-21diskmemload10:19:263
2737699230,23cyclictest0-21swapper/311:50:143
2737699230,23cyclictest0-21swapper/311:35:483
2737699230,23cyclictest0-21swapper/311:17:573
2737699230,23cyclictest0-21swapper/309:40:123
2737699230,23cyclictest0-21swapper/309:19:273
2737699230,23cyclictest0-21swapper/309:10:563
2737699230,22cyclictest8163-21ssh09:55:263
2737699230,22cyclictest4931-21ssh10:21:253
2737699230,22cyclictest4379-21diskmemload12:12:533
2737699230,22cyclictest26228-21ssh10:11:443
2737699230,22cyclictest19437-21idleruntime-cro08:00:013
2737699230,22cyclictest1333-21ssh10:46:523
2737699230,22cyclictest11606-21ssh09:30:193
2737699230,0cyclictest0-21swapper/312:02:273
2737699230,0cyclictest0-21swapper/311:33:053
2737699230,0cyclictest0-21swapper/311:11:283
2737699230,0cyclictest0-21swapper/309:50:133
27371992323,0cyclictest0-21swapper/212:06:262
27371992323,0cyclictest0-21swapper/210:35:312
27371992323,0cyclictest0-21swapper/209:18:292
27371992321,2cyclictest24803-21sh11:35:062
27371992320,0cyclictest0-21swapper/212:10:162
2737199230,2cyclictest20771-21sh10:07:122
2737199230,23cyclictest0-21swapper/212:22:282
2737199230,23cyclictest0-21swapper/211:55:562
2737199230,23cyclictest0-21swapper/209:32:262
2737199230,23cyclictest0-21swapper/209:25:042
2737199230,22cyclictest8602-21rm09:55:582
2737199230,22cyclictest3468-21ssh11:44:292
2737199230,22cyclictest29633-21ssh11:11:152
2737199230,22cyclictest22607-21idleruntime-cro09:40:012
2737199230,22cyclictest10715-21rm11:50:412
2737199230,22cyclictest0-21swapper/211:46:142
2737199230,1cyclictest23615-21sh11:06:142
2737199230,0cyclictest0-21swapper/212:32:152
2737199230,0cyclictest0-21swapper/211:18:332
2737199230,0cyclictest0-21swapper/211:00:522
2737199230,0cyclictest0-21swapper/210:53:162
2737199230,0cyclictest0-21swapper/210:21:352
27369992323,0cyclictest20682-21diskmemload10:34:071
27369992323,0cyclictest20682-21diskmemload10:29:391
27369992323,0cyclictest0-21swapper/111:31:171
27369992323,0cyclictest0-21swapper/111:04:161
27369992323,0cyclictest0-21swapper/110:50:281
27369992323,0cyclictest0-21swapper/110:47:001
27369992323,0cyclictest0-21swapper/109:10:101
27369992321,1cyclictest0-21swapper/110:41:071
27369992321,1cyclictest0-21swapper/110:17:181
27369992321,1cyclictest0-21swapper/107:55:011
27369992320,2cyclictest5242-21sh11:46:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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