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2026-05-06 - 20:21

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 Wed May 06, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3263721020,3sleep041ktimersoftd/005:54:470
2188521010,5sleep2281ktimersoftd/206:39:472
268199974,77cyclictest0-21swapper/009:00:520
268199974,77cyclictest0-21swapper/009:00:520
268199964,24cyclictest0-21swapper/007:39:540
268199954,22cyclictest2507-21gdm-simple-gree08:32:170
268199934,26cyclictest0-21swapper/007:14:070
2681999331,10cyclictest3255-21strings10:14:390
268199933,24cyclictest31804-21grep07:44:530
268199926,24cyclictest0-21swapper/010:01:370
268199925,24cyclictest0-21swapper/007:28:360
268199924,25cyclictest0-21swapper/010:11:170
2681999222,11cyclictest0-21swapper/008:03:510
268199914,28cyclictest0-21swapper/010:19:320
157292910,12sleep1268299cyclictest07:22:191
268199904,35cyclictest0-21swapper/008:14:510
268199904,35cyclictest0-21swapper/008:14:510
268199904,35cyclictest0-21swapper/007:30:370
268199904,28cyclictest0-21swapper/008:09:540
268199904,27cyclictest0-21swapper/006:24:530
268199904,26cyclictest0-21swapper/008:54:070
268199904,26cyclictest0-21swapper/008:39:300
268199904,25cyclictest0-21swapper/009:04:290
268199903,24cyclictest0-21swapper/007:38:370
268199903,24cyclictest0-21swapper/007:38:370
268199894,28cyclictest0-21swapper/005:29:480
268199894,27cyclictest0-21swapper/006:59:490
268199894,27cyclictest0-21swapper/004:54:570
268199894,25cyclictest0-21swapper/009:54:480
2681998919,12cyclictest0-21swapper/008:04:530
268199884,38cyclictest0-21swapper/009:34:290
268199884,35cyclictest0-21swapper/009:29:410
268199884,28cyclictest0-21swapper/006:04:430
268199884,26cyclictest0-21swapper/009:24:350
268199884,12cyclictest0-21swapper/008:58:360
268199883,30cyclictest0-21swapper/007:23:130
268199883,27cyclictest0-21swapper/009:39:300
268199874,26cyclictest0-21swapper/007:54:560
268199874,25cyclictest0-21swapper/007:14:540
268199873,25cyclictest0-21swapper/008:44:450
2681998729,10cyclictest7039-21head05:00:020
268199864,26cyclictest0-21swapper/009:17:320
268199864,26cyclictest0-21swapper/006:54:380
2681998533,8cyclictest7147-21grep06:09:420
2681998533,8cyclictest7147-21grep06:09:420
268199853,26cyclictest0-21swapper/008:39:190
268199845,34cyclictest0-21swapper/009:20:210
268199844,26cyclictest0-21swapper/010:04:490
268199844,26cyclictest0-21swapper/009:49:520
268199844,26cyclictest0-21swapper/008:26:290
268199834,25cyclictest0-21swapper/009:44:500
268199824,24cyclictest0-21swapper/007:07:260
2681998235,9cyclictest22918-21wc05:34:470
2681998231,10cyclictest9190-21cpuspeed_turbos06:14:380
268199823,27cyclictest0-21swapper/005:49:570
2681998116,12cyclictest0-21swapper/005:43:100
268199803,27cyclictest0-21swapper/008:20:470
2681997920,12cyclictest0-21swapper/009:13:080
268199773,25cyclictest0-21swapper/007:51:300
23522670,4sleep12471-21df_abs10:14:291
44672644,13sleep20-21swapper/208:40:012
268299646,35cyclictest0-21swapper/109:14:181
248599640,6rtkit-daemon26032-21yum-updatesd-he05:40:071
248599640,6rtkit-daemon0-21swapper/005:00:391
268299635,36cyclictest0-21swapper/109:29:461
2682996227,13cyclictest0-21swapper/107:32:501
248599600,5rtkit-daemon2671-21cyclictest05:10:531
248599600,4rtkit-daemon23658-21ssh08:21:231
268499595,35cyclictest0-21swapper/310:23:383
268399593,50cyclictest0-21swapper/209:08:332
2682995929,11cyclictest7790-21vmstat08:44:521
248599590,7rtkit-daemon0-21swapper/008:24:531
248599590,7rtkit-daemon0-21swapper/005:17:231
2683995838,14cyclictest0-21swapper/208:09:412
268499575,45cyclictest1876-21munin-node10:14:253
268399575,44cyclictest0-21swapper/207:54:312
2683995720,29cyclictest7074-21crond09:39:112
268299574,28cyclictest0-21swapper/106:54:501
260472573,10sleep10-21swapper/107:38:001
260472573,10sleep10-21swapper/107:38:001
248599570,6rtkit-daemon0-21swapper/005:25:001
248599570,6rtkit-daemon0-21swapper/005:25:001
232372573,12sleep30-21swapper/308:19:553
14512573,12sleep10-21swapper/110:13:451
268499564,45cyclictest0-21swapper/310:09:453
268399564,43cyclictest11906-21ssh07:15:562
268399563,45cyclictest0-21swapper/209:39:362
268299569,38cyclictest0-21swapper/107:40:021
2682995617,23cyclictest0-21swapper/107:10:521
248599560,6rtkit-daemon2484-21rtkit-daemon08:54:372
248599560,6rtkit-daemon2484-21rtkit-daemon06:34:422
248599560,6rtkit-daemon0-21swapper/005:29:301
102852563,13sleep10-21swapper/108:01:471
58782554,44sleep20-21swapper/207:09:232
271192553,12sleep20-21swapper/208:26:472
268399555,44cyclictest0-21swapper/209:27:382
268299555,35cyclictest0-21swapper/104:58:251
268299555,13cyclictest1419-21runrttasks08:35:371
2682995526,13cyclictest0-21swapper/108:14:191
268199554,28cyclictest0-21swapper/006:34:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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