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2026-04-09 - 13:03

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 792 highest latencies:
System rack1slot6s.osadl.org (updated Thu Apr 09, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21832991014,8cyclictest121850irq/46-eth021:40:220
2183899984,48cyclictest0-21swapper/319:52:533
2183799973,87cyclictest0-21swapper/220:02:232
2183899964,49cyclictest0-21swapper/322:12:443
2183299963,25cyclictest31666-21basename17:40:270
2183899954,43cyclictest25885-21crond22:00:073
21837999529,13cyclictest0-21swapper/218:00:452
2183299954,66cyclictest0-21swapper/021:35:070
2183299954,16cyclictest0-21swapper/021:56:310
2183299953,9cyclictest121850irq/46-eth022:00:360
21832999523,50cyclictest0-21swapper/019:33:570
21832999519,10cyclictest0-21swapper/022:34:510
2183899945,45cyclictest0-21swapper/320:38:363
2183899944,83cyclictest0-21swapper/320:17:193
2183899944,83cyclictest0-21swapper/320:17:193
2183899944,46cyclictest0-21swapper/319:22:473
2183799945,82cyclictest0-21swapper/221:30:232
2183799945,80cyclictest0-21swapper/218:15:322
2183799943,84cyclictest0-21swapper/221:55:332
21832999432,45cyclictest0-21swapper/022:29:210
21832999425,52cyclictest0-21swapper/018:15:340
21832999425,49cyclictest0-21swapper/020:35:170
2183899935,45cyclictest21862-21if_err_eth022:40:263
21837999336,48cyclictest3440-21grep17:45:502
2183799933,24cyclictest0-21swapper/220:15:412
2183799933,24cyclictest0-21swapper/220:15:412
21837999329,12cyclictest0-21swapper/219:24:472
2183299934,27cyclictest14563-21diskmemload19:55:300
21832999320,12cyclictest0-21swapper/020:40:400
2183899924,80cyclictest0-21swapper/320:43:543
2183899924,48cyclictest0-21swapper/321:31:353
2183899924,47cyclictest0-21swapper/318:00:413
2183899924,46cyclictest0-21swapper/322:39:243
2183899924,43cyclictest0-21swapper/322:18:033
21837999231,9cyclictest22053-21munin-node17:20:362
21837999231,44cyclictest0-21swapper/222:45:212
2183299924,80cyclictest0-21swapper/020:50:090
2183299924,25cyclictest0-21swapper/019:48:160
2183299924,24cyclictest0-21swapper/022:45:200
21832999226,51cyclictest0-21swapper/021:15:240
21832999224,52cyclictest0-21swapper/019:20:180
21832999218,9cyclictest121850irq/46-eth022:20:280
2183899914,46cyclictest0-21swapper/321:49:323
2183799914,79cyclictest20962-21yum-updatesd-he21:04:352
2183799913,8cyclictest121850irq/46-eth021:15:272
2183799913,32cyclictest0-21swapper/220:27:412
2183299915,24cyclictest0-21swapper/022:08:210
2183299914,25cyclictest0-21swapper/021:35:270
2183299914,25cyclictest0-21swapper/021:35:270
2183299914,24cyclictest0-21swapper/019:52:440
2183299914,23cyclictest0-21swapper/020:06:030
2183299913,26cyclictest0-21swapper/021:27:240
21832999124,52cyclictest0-21swapper/021:05:280
21832999123,53cyclictest0-21swapper/021:21:390
2183799905,26cyclictest0-21swapper/222:25:342
2183299905,24cyclictest0-21swapper/019:38:250
2183299905,24cyclictest0-21swapper/019:38:250
21832999027,47cyclictest14563-21diskmemload20:10:380
21832999026,50cyclictest0-21swapper/021:05:090
21832999019,12cyclictest0-21swapper/022:40:050
2183899895,30cyclictest0-21swapper/317:56:493
2183899894,50cyclictest0-21swapper/322:20:293
2183899894,46cyclictest0-21swapper/319:40:133
2183899894,44cyclictest0-21swapper/320:00:203
21837998933,49cyclictest26227-21tune2fs18:35:332
2183299896,24cyclictest0-21swapper/020:50:480
2183299895,25cyclictest0-21swapper/020:30:290
2183299894,24cyclictest0-21swapper/022:11:220
2183299894,24cyclictest0-21swapper/020:27:060
2183299894,24cyclictest0-21swapper/019:44:580
2183299893,79cyclictest0-21swapper/018:05:150
21832998921,9cyclictest0-21swapper/020:15:470
21832998921,9cyclictest0-21swapper/020:15:470
2183899885,17cyclictest0-21swapper/321:07:123
2183899884,47cyclictest0-21swapper/320:56:143
2183899884,47cyclictest0-21swapper/320:56:143
2183899884,45cyclictest0-21swapper/321:17:063
2183899884,30cyclictest0-21swapper/322:48:303
2183799884,9cyclictest1419-21runrttasks17:42:392
2183799884,34cyclictest0-21swapper/222:05:242
2183799884,32cyclictest0-21swapper/221:45:412
2183799883,32cyclictest13297-21ssh21:40:242
21837998815,9cyclictest121850irq/46-eth020:50:592
2183299886,23cyclictest0-21swapper/022:40:250
2183299885,24cyclictest0-21swapper/021:13:050
2183299884,25cyclictest0-21swapper/020:22:580
2183299883,25cyclictest0-21swapper/021:46:410
21832998825,9cyclictest23729-21kworker/0:219:25:260
2183899874,48cyclictest0-21swapper/320:46:493
2183799877,36cyclictest0-21swapper/222:30:312
2183799874,75cyclictest0-21swapper/219:35:282
2183799874,75cyclictest0-21swapper/219:35:282
2183799873,77cyclictest53952sleep221:29:032
21837998727,9cyclictest1419-21runrttasks21:05:472
2183299876,24cyclictest0-21swapper/021:50:100
2183299874,76cyclictest0-21swapper/020:55:290
2183299874,76cyclictest0-21swapper/020:55:290
2183299874,28cyclictest0-21swapper/018:23:410
2183299874,27cyclictest0-21swapper/019:10:350
2183299874,27cyclictest0-21swapper/019:00:320
2183299874,26cyclictest0-21swapper/022:15:220
2183899865,47cyclictest0-21swapper/322:29:303
2183899864,74cyclictest0-21swapper/321:55:413
2183799864,75cyclictest0-21swapper/221:23:032
2183799864,74cyclictest0-21swapper/222:40:202
2183799863,76cyclictest0-21swapper/220:40:352
2183799863,34cyclictest0-21swapper/218:20:272
2183799863,12cyclictest0-21swapper/220:34:592
2183299864,75cyclictest0-21swapper/017:21:240
2183299864,62cyclictest0-21swapper/018:35:310
21832998628,45cyclictest0-21swapper/020:02:440
21832998610,10cyclictest121850irq/46-eth019:20:120
2183899855,46cyclictest0-21swapper/320:26:353
2183899855,45cyclictest0-21swapper/321:21:433
2183799854,74cyclictest0-21swapper/219:25:302
2183799854,73cyclictest0-21swapper/219:53:092
2183799854,32cyclictest0-21swapper/222:00:292
2183799853,75cyclictest0-21swapper/220:55:532
2183799853,75cyclictest0-21swapper/220:55:532
2183799853,37cyclictest0-21swapper/217:30:422
2183799853,37cyclictest0-21swapper/217:30:422
2183799853,22cyclictest25439-21rm21:10:282
21837998519,12cyclictest0-21swapper/219:55:232
21837998519,11cyclictest0-21swapper/218:30:152
2183899845,45cyclictest18466-21df21:00:233
2183899845,29cyclictest0-21swapper/321:40:563
21838998414,23cyclictest13534-21cpuspeed20:05:243
2183799844,35cyclictest0-21swapper/219:31:512
2183799843,35cyclictest0-21swapper/218:35:142
21837998428,13cyclictest0-21swapper/221:38:562
21837998428,13cyclictest0-21swapper/221:38:562
2183299844,27cyclictest0-21swapper/017:45:480
21832998423,44cyclictest0-21swapper/018:25:460
2183899834,46cyclictest0-21swapper/319:28:213
2183899834,30cyclictest0-21swapper/320:33:043
2183799834,13cyclictest0-21swapper/218:10:472
2183799834,13cyclictest0-21swapper/218:10:472
2183799833,39cyclictest0-21swapper/222:10:172
2183799833,33cyclictest7679-21tr22:20:182
2183799833,23cyclictest23398-21ssh20:20:222
21832998336,34cyclictest0-21swapper/017:55:320
2183799824,35cyclictest0-21swapper/222:35:252
2183799823,35cyclictest0-21swapper/221:54:412
2183299824,70cyclictest0-21swapper/018:50:470
2183299824,26cyclictest0-21swapper/018:40:320
21832998222,53cyclictest0-21swapper/018:05:280
2183899815,27cyclictest0-21swapper/322:33:023
2183899814,12cyclictest26781-21sendmail_mailqu19:35:423
2183899814,12cyclictest26781-21sendmail_mailqu19:35:423
2183799814,24cyclictest0-21swapper/219:45:292
2183799813,14cyclictest0-21swapper/220:12:332
2183299813,10cyclictest0-21swapper/018:55:240
2183299813,10cyclictest0-21swapper/018:55:240
2183799803,36cyclictest0-21swapper/222:18:022
2183299804,69cyclictest0-21swapper/018:10:270
2183299804,69cyclictest0-21swapper/018:10:270
2183799794,37cyclictest0-21swapper/218:55:382
2183799794,37cyclictest0-21swapper/218:55:382
2183799794,25cyclictest0-21swapper/219:41:542
2183799794,11cyclictest0-21swapper/220:45:382
21837997912,12cyclictest0-21swapper/218:50:142
2183299795,22cyclictest0-21swapper/017:25:270
2183299794,24cyclictest0-21swapper/017:35:300
2183299794,14cyclictest0-21swapper/017:51:480
21832997927,46cyclictest26987-21cpu17:30:290
21832997927,46cyclictest26987-21cpu17:30:290
21832997920,9cyclictest31240-21gltestperf18:45:330
2183799784,32cyclictest0-21swapper/219:00:432
2183799783,26cyclictest0-21swapper/217:55:322
2183799783,12cyclictest0-21swapper/220:37:462
2183799772,35cyclictest0-21swapper/219:15:122
2183299763,10cyclictest121850irq/46-eth018:30:430
21832997625,9cyclictest8489-21tail19:05:330
2183799754,32cyclictest0-21swapper/218:40:422
2183799752,10cyclictest0-21swapper/220:10:002
2183299755,15cyclictest0-21swapper/017:20:170
21837997328,9cyclictest1419-21runrttasks19:19:252
21837997326,9cyclictest1419-21runrttasks18:53:582
21837997325,10cyclictest1419-21runrttasks19:06:392
21837997219,11cyclictest11622-21cstates18:05:292
2183799714,14cyclictest0-21swapper/217:50:272
248599700,8rtkit-daemon0-21swapper/119:24:591
2183899665,53cyclictest1419-21runrttasks19:45:323
248599640,5rtkit-daemon23888-21ssh21:55:301
21836996227,26cyclictest17779-21timerwakeupswit21:45:391
2183899615,50cyclictest0-21swapper/320:50:343
2183899615,49cyclictest0-21swapper/319:30:473
2183899614,50cyclictest23369-21munin-node20:20:283
2183899614,50cyclictest0-21swapper/319:55:443
2183899605,48cyclictest0-21swapper/318:36:563
2183899604,48cyclictest0-21swapper/321:35:333
2183899604,48cyclictest0-21swapper/321:35:333
2183899604,48cyclictest0-21swapper/321:29:303
2183699605,36cyclictest0-21swapper/121:35:361
2183699605,36cyclictest0-21swapper/121:35:361
2183899595,47cyclictest0-21swapper/321:50:353
2183899594,48cyclictest0-21swapper/321:10:333
2183899594,48cyclictest0-21swapper/318:35:103
2183899594,48cyclictest0-21swapper/317:51:483
2183899574,47cyclictest0-21swapper/322:08:463
2183899574,46cyclictest0-21swapper/320:11:513
2183699575,45cyclictest0-21swapper/121:52:291
2183699575,33cyclictest0-21swapper/119:25:401
2183699574,38cyclictest0-21swapper/119:30:461
2183699574,37cyclictest0-21swapper/121:43:121
2183699574,15cyclictest0-21swapper/122:31:261
21836995720,20cyclictest29809-21timerwakeupswit21:15:401
21836995719,22cyclictest27412-21forks17:30:331
21836995719,22cyclictest27412-21forks17:30:331
21836995716,23cyclictest0-21swapper/121:04:381
2183699569,30cyclictest0-21swapper/119:50:441
2183699564,31cyclictest0-21swapper/120:50:091
2183699563,36cyclictest0-21swapper/119:05:251
21836995613,34cyclictest30482-21hwlatdetect22:05:261
102282562,7sleep114563-21diskmemload22:24:141
2183699555,16cyclictest0-21swapper/120:40:481
2183699555,15cyclictest0-21swapper/119:38:241
2183699555,15cyclictest0-21swapper/119:38:241
2183699554,45cyclictest0-21swapper/121:10:311
2183699554,27cyclictest0-21swapper/121:28:351
21836995519,21cyclictest18289-21fschecks_time22:35:251
2183699545,29cyclictest0-21swapper/118:15:371
2183699545,29cyclictest0-21swapper/117:45:331
2183699545,28cyclictest0-21swapper/120:57:571
2183699545,28cyclictest0-21swapper/120:57:571
2183699545,28cyclictest0-21swapper/119:05:151
2183699544,31cyclictest0-21swapper/121:20:261
2183699544,30cyclictest0-21swapper/120:30:361
21836995436,11cyclictest25311-21gltestperf17:25:361
21836995436,11cyclictest2302-21chrt22:10:381
21836995434,12cyclictest10741-21tail20:00:301
21836995425,20cyclictest5965-21munin-node21:30:371
2183899539,26cyclictest0-21swapper/318:20:273
2183699535,29cyclictest0-21swapper/121:05:301
2183699534,32cyclictest0-21swapper/120:20:311
2183699534,29cyclictest0-21swapper/118:25:151
21836995320,27cyclictest24612-21cpuspeed_turbos22:45:191
21836995320,14cyclictest0-21swapper/119:40:301
21836995320,13cyclictest0-21swapper/118:35:471
248599520,5rtkit-daemon2484-21rtkit-daemon17:25:482
2183899524,28cyclictest0-21swapper/319:10:243
2183699525,29cyclictest0-21swapper/122:40:221
2183699525,28cyclictest0-21swapper/122:00:271
2183699525,27cyclictest0-21swapper/120:12:141
2183699524,29cyclictest0-21swapper/122:15:201
2183699524,28cyclictest0-21swapper/120:05:391
2183699524,28cyclictest0-21swapper/117:55:461
2183699524,27cyclictest0-21swapper/118:55:421
2183699524,27cyclictest0-21swapper/118:55:421
2183699524,25cyclictest8056-21sensors19:55:421
2183699524,24cyclictest29269-21aten2.4-expect17:35:281
2183699524,22cyclictest1496-21expr20:35:261
21836995220,13cyclictest0-21swapper/120:17:131
21836995220,13cyclictest0-21swapper/120:17:131
21836995220,13cyclictest0-21swapper/119:47:581
248599510,5rtkit-daemon2484-21rtkit-daemon17:35:412
2183699516,25cyclictest0-21swapper/122:28:571
2183699515,27cyclictest0-21swapper/120:51:401
2183699514,28cyclictest0-21swapper/120:25:391
21836995128,14cyclictest0-21swapper/118:05:451
104372513,8sleep110577-21df_inode19:10:281
2183899506,29cyclictest0-21swapper/318:11:523
2183899506,29cyclictest0-21swapper/318:11:523
2183899506,28cyclictest0-21swapper/317:46:433
2183899505,29cyclictest0-21swapper/318:45:293
2183899504,30cyclictest0-21swapper/319:00:153
2183899504,30cyclictest0-21swapper/318:50:313
2183699505,27cyclictest0-21swapper/117:40:341
2183699504,37cyclictest23742-21unixbench_multi17:20:491
2183699504,28cyclictest0-21swapper/118:45:311
2183699504,28cyclictest0-21swapper/118:30:251
2183699504,28cyclictest0-21swapper/118:10:431
2183699504,28cyclictest0-21swapper/118:10:431
21836995031,12cyclictest10536-21unixbench-2d18:00:471
2183899495,30cyclictest0-21swapper/317:35:443
2183899494,37cyclictest0-21swapper/319:05:253
2183899494,29cyclictest0-21swapper/318:25:273
2183899494,28cyclictest0-21swapper/319:20:133
2183699495,27cyclictest0-21swapper/117:53:391
2183699494,27cyclictest0-21swapper/118:50:241
2183699494,24cyclictest14585-21ssh19:20:121
2183899484,26cyclictest0-21swapper/317:31:443
2183899484,26cyclictest0-21swapper/317:31:443
2183699483,27cyclictest0-21swapper/118:40:361
2183899475,26cyclictest0-21swapper/317:26:443
21838994730,11cyclictest5547-21cut19:00:263
21838994718,9cyclictest11668-21df18:05:303
21838994630,9cyclictest28797-21gltestperf18:40:323
2183899463,13cyclictest0-21swapper/318:15:453
9842452,36sleep30-21swapper/317:41:183
21838994516,12cyclictest0-21swapper/318:58:413
2183899434,34cyclictest0-21swapper/317:20:183
21838994312,13cyclictest0-21swapper/317:20:423
2183699433,32cyclictest21396-21forks18:25:311
248599370,4rtkit-daemon2484-21rtkit-daemon17:18:342
2183699355,19cyclictest0-21swapper/117:20:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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