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2026-05-14 - 10:00

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 Thu May 14, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
113889910937,12cyclictest0-21swapper/219:32:402
11381991075,50cyclictest0-21swapper/018:54:090
11381991066,49cyclictest0-21swapper/019:57:450
113889910534,12cyclictest0-21swapper/221:12:092
11381991055,47cyclictest22447-21gltestperf19:12:370
11381991026,46cyclictest2627-21unixbench_multi20:17:500
113889910036,13cyclictest0-21swapper/219:39:212
11381991005,52cyclictest27308-21grep20:07:360
1138699994,50cyclictest0-21swapper/121:34:401
1138199996,52cyclictest0-21swapper/020:33:240
1138199995,51cyclictest0-21swapper/018:51:190
11388999822,13cyclictest0-21swapper/221:47:232
11386999711,43cyclictest0-21swapper/119:02:341
1138899963,37cyclictest12910-21ssh18:57:532
1138899963,37cyclictest12910-21ssh18:57:532
1138199964,48cyclictest0-21swapper/019:29:040
1138899954,28cyclictest0-21swapper/219:20:372
1138899954,27cyclictest0-21swapper/221:55:052
1138899944,28cyclictest0-21swapper/217:37:372
1138899944,28cyclictest0-21swapper/217:37:372
1138899935,27cyclictest0-21swapper/220:14:192
1138899934,28cyclictest0-21swapper/220:02:512
11388999334,12cyclictest0-21swapper/219:27:212
1138199934,12cyclictest0-21swapper/019:17:290
1138899928,24cyclictest0-21swapper/220:52:502
1138899925,28cyclictest0-21swapper/220:32:492
1138899915,27cyclictest0-21swapper/220:57:362
1138899914,28cyclictest0-21swapper/221:12:372
1138899913,28cyclictest0-21swapper/219:57:402
1138899904,30cyclictest0-21swapper/219:02:292
11388999033,12cyclictest0-21swapper/219:55:112
1138699903,50cyclictest4126-21diskmemload19:12:311
20322890,6chrt0-21swapper/320:17:423
11388998924,21cyclictest1419-21runrttasks18:01:492
1138899883,27cyclictest0-21swapper/220:25:552
1138899883,27cyclictest0-21swapper/220:25:552
1138899874,29cyclictest0-21swapper/218:07:532
11388998732,7cyclictest4126-21diskmemload20:43:422
1138899873,37cyclictest0-21swapper/221:40:332
11388998716,14cyclictest0-21swapper/219:14:422
1138699874,49cyclictest0-21swapper/119:52:481
1138899865,28cyclictest0-21swapper/220:30:372
1138899865,26cyclictest0-21swapper/221:58:382
1138899864,29cyclictest0-21swapper/217:17:422
11388998634,10cyclictest0-21swapper/220:11:002
1138899855,30cyclictest0-21swapper/222:07:282
1138899854,33cyclictest0-21swapper/218:48:232
1138899845,27cyclictest0-21swapper/219:44:072
1138899834,28cyclictest0-21swapper/222:12:132
1138899834,27cyclictest0-21swapper/220:48:472
1138899834,27cyclictest0-21swapper/218:52:342
1138899825,26cyclictest0-21swapper/219:26:222
11388998117,15cyclictest0-21swapper/217:32:402
11388998114,15cyclictest0-21swapper/221:42:152
11388998114,15cyclictest0-21swapper/221:42:152
1138899804,28cyclictest0-21swapper/217:44:182
11388998018,13cyclictest0-21swapper/221:24:142
11388997931,10cyclictest0-21swapper/220:38:112
11388997818,13cyclictest0-21swapper/220:17:282
1138899764,27cyclictest0-21swapper/221:06:392
1138899764,27cyclictest0-21swapper/221:06:392
11388997631,9cyclictest0-21swapper/219:08:332
248599710,3rtkit-daemon0-21swapper/320:12:203
248599690,7rtkit-daemon0-21swapper/319:33:073
20052690,5sleep32009-21tail18:42:323
248599660,4rtkit-daemon2484-21rtkit-daemon21:15:403
248599660,11rtkit-daemon0-21swapper/318:55:233
248599650,9rtkit-daemon0-21swapper/317:36:493
248599650,3rtkit-daemon0-21swapper/321:26:023
11388996539,9cyclictest7347-21ssh22:02:262
11388996537,13cyclictest0-21swapper/217:52:472
248599640,8rtkit-daemon0-21swapper/321:43:173
248599640,8rtkit-daemon0-21swapper/321:43:173
248599640,8rtkit-daemon0-21swapper/317:21:043
248599640,7rtkit-daemon0-21swapper/319:31:293
248599640,3rtkit-daemon0-21swapper/319:18:073
248599640,11rtkit-daemon0-21swapper/319:26:523
248599640,11rtkit-daemon0-21swapper/319:04:003
248599640,11rtkit-daemon0-21swapper/318:23:393
248599640,11rtkit-daemon0-21swapper/317:58:033
248599640,11rtkit-daemon0-21swapper/317:02:053
248599640,10rtkit-daemon0-21swapper/320:52:113
248599640,10rtkit-daemon0-21swapper/317:51:413
248599640,10rtkit-daemon0-21swapper/317:24:043
1138199645,52cyclictest0-21swapper/019:45:270
1138199645,51cyclictest11635-21grep18:57:340
1138199645,51cyclictest11635-21grep18:57:340
248599630,9rtkit-daemon0-21swapper/321:56:163
248599630,9rtkit-daemon0-21swapper/321:30:253
248599630,9rtkit-daemon0-21swapper/320:11:053
248599630,9rtkit-daemon0-21swapper/319:51:143
248599630,9rtkit-daemon0-21swapper/319:42:213
248599630,9rtkit-daemon0-21swapper/319:13:303
248599630,9rtkit-daemon0-21swapper/318:08:403
248599630,9rtkit-daemon0-21swapper/318:03:403
248599630,9rtkit-daemon0-21swapper/317:44:333
248599630,8rtkit-daemon0-21swapper/319:59:583
248599630,8rtkit-daemon0-21swapper/317:30:123
248599630,7rtkit-daemon0-21swapper/322:09:383
248599630,12rtkit-daemon0-21swapper/320:33:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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