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2026-07-07 - 17:20

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Tue Jul 07, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3110921160,27sleep041ktimersoftd/011:01:200
104532990,5sleep310452-21tail11:18:003
1574999838,51cyclictest0-21swapper/011:25:430
157499974,37cyclictest0-21swapper/009:53:150
1574999711,14cyclictest0-21swapper/009:33:000
1574999521,9cyclictest31347-21ssh08:38:120
157499944,34cyclictest0-21swapper/009:13:160
1574999424,23cyclictest0-21swapper/009:32:060
1574999412,36cyclictest0-21swapper/011:53:120
157499934,24cyclictest0-21swapper/011:37:570
157499934,24cyclictest0-21swapper/011:37:570
1574999325,15cyclictest0-21swapper/011:03:020
1574999325,15cyclictest0-21swapper/011:03:020
1574999321,13cyclictest0-21swapper/009:23:140
1574999311,21cyclictest0-21swapper/008:53:140
157499925,36cyclictest0-21swapper/010:08:420
157499924,34cyclictest0-21swapper/011:32:560
157499924,28cyclictest0-21swapper/011:18:040
157499923,13cyclictest19476-21tune2fs09:08:050
157499913,26cyclictest0-21swapper/010:53:070
157499905,34cyclictest0-21swapper/009:03:150
157499905,25cyclictest0-21swapper/008:42:570
157499904,78cyclictest0-21swapper/011:59:110
157499903,36cyclictest6599-21grep11:12:560
1574999017,9cyclictest11236-21awk10:32:430
157499895,33cyclictest1227-21runrttasks07:21:230
157499894,34cyclictest0-21swapper/008:48:090
157499894,25cyclictest0-21swapper/010:43:120
1574998918,27cyclictest22882-21strings10:48:080
1574998918,13cyclictest0-21swapper/009:19:520
157499885,24cyclictest0-21swapper/011:31:270
157499885,13cyclictest0-21swapper/010:26:270
157499885,13cyclictest0-21swapper/010:26:270
157499884,34cyclictest0-21swapper/009:38:070
157499884,25cyclictest0-21swapper/008:27:590
157499884,13cyclictest5909-21yum-updatesd-he11:12:420
1574998818,12cyclictest0-21swapper/009:48:060
157499875,32cyclictest0-21swapper/010:15:200
157499875,32cyclictest0-21swapper/009:43:200
157499875,27cyclictest0-21swapper/010:22:440
157499875,27cyclictest0-21swapper/010:22:440
157499875,26cyclictest0-21swapper/010:04:040
157499875,24cyclictest0-21swapper/010:40:190
157499874,25cyclictest0-21swapper/008:13:160
157499874,24cyclictest0-21swapper/010:00:480
1574998725,11cyclictest1227-21runrttasks11:48:180
157499865,32cyclictest0-21swapper/008:35:560
157499864,26cyclictest0-21swapper/010:33:020
157499864,24cyclictest0-21swapper/011:46:240
157499864,24cyclictest0-21swapper/011:46:240
157499854,32cyclictest0-21swapper/007:23:110
157499854,27cyclictest0-21swapper/008:07:490
157499844,33cyclictest0-21swapper/008:22:230
157499844,33cyclictest0-21swapper/008:22:230
157499844,25cyclictest0-21swapper/008:58:560
157499844,15cyclictest0-21swapper/006:41:320
157499844,12cyclictest0-21swapper/007:36:420
157499825,32cyclictest0-21swapper/006:33:120
157499825,13cyclictest0-21swapper/007:13:050
157499804,35cyclictest0-21swapper/006:53:090
157499804,35cyclictest0-21swapper/006:53:090
157499804,33cyclictest0-21swapper/008:08:050
157499804,33cyclictest0-21swapper/007:52:490
157499804,33cyclictest0-21swapper/006:58:070
1574998024,13cyclictest0-21swapper/007:53:130
157499795,29cyclictest18742-21aten2.4-expect07:08:040
200982750,3sleep3361ktimersoftd/309:08:153
1578997324,41cyclictest10018-21grep08:53:181
1578997122,28cyclictest5110-21unixbench_multi09:33:211
1578996921,40cyclictest4324-21ps11:08:111
1578996817,29cyclictest23607-21ssh09:13:181
1578996813,30cyclictest0-21swapper/109:58:571
219499670,4rtkit-daemon2193-21rtkit-daemon11:42:373
219499670,4rtkit-daemon2193-21rtkit-daemon11:42:373
1578996718,42cyclictest20996-21needreboot11:33:051
1578996624,34cyclictest1740-21gltestperf11:53:001
1578996624,33cyclictest7052-21cpuspeed_turbos09:37:591
1578996617,15cyclictest10268-21ssh11:17:591
1578996616,42cyclictest0-21swapper/110:43:531
1578996614,46cyclictest0-21swapper/110:17:551
1578996614,46cyclictest0-21swapper/110:17:551
1578996614,45cyclictest0-21swapper/109:48:411
84192653,40sleep30-21swapper/311:14:233
219499650,4rtkit-daemon24018-21rm10:50:092
219499650,4rtkit-daemon2193-21rtkit-daemon09:40:413
1578996518,41cyclictest18759-21aten_r1power_en09:07:571
1578996518,40cyclictest4712-21latency_hist08:47:471
1578996516,43cyclictest0-21swapper/110:38:341
1578996515,44cyclictest0-21swapper/111:46:161
1578996515,44cyclictest0-21swapper/111:46:161
1578996515,42cyclictest0-21swapper/109:17:561
219499640,3rtkit-daemon2193-21rtkit-daemon08:55:282
157899647,49cyclictest0-21swapper/110:51:171
1578996422,35cyclictest32495-21grep11:03:001
1578996422,35cyclictest32495-21grep11:03:001
1578996422,34cyclictest17738-21cpuspeed_turbos08:13:031
1578996421,27cyclictest3372-21cpuspeed_turbos07:43:051
1578996419,37cyclictest0-21swapper/108:12:431
1578996418,29cyclictest10883-21ssh10:31:271
1578996416,41cyclictest0-21swapper/109:43:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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