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2026-03-12 - 16:36

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 Mar 12, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
222789910139,10cyclictest0-21swapper/008:41:320
2228199974,86cyclictest0-21swapper/210:41:382
2228199963,86cyclictest28845-21cpuspeed_turbos09:41:092
2227899965,32cyclictest0-21swapper/007:16:370
2227899964,37cyclictest0-21swapper/007:51:140
2227899954,24cyclictest0-21swapper/009:46:420
2228199944,82cyclictest0-21swapper/209:56:222
2227899944,42cyclictest0-21swapper/008:03:280
2227899944,25cyclictest0-21swapper/010:26:400
22278999438,49cyclictest0-21swapper/011:10:340
22278999438,49cyclictest0-21swapper/010:54:580
22278999438,49cyclictest0-21swapper/010:54:580
22278999424,14cyclictest0-21swapper/010:01:110
2228199933,83cyclictest0-21swapper/211:04:302
2227899935,29cyclictest0-21swapper/008:54:390
2227899935,10cyclictest8648-21cpuspeed_turbos09:11:100
2227899934,41cyclictest0-21swapper/009:55:140
2227899934,39cyclictest0-21swapper/009:38:300
2227899934,24cyclictest0-21swapper/008:36:200
22278999336,50cyclictest0-21swapper/009:31:120
2227899924,34cyclictest0-21swapper/009:26:080
2227899924,34cyclictest0-21swapper/008:06:150
2227899924,13cyclictest0-21swapper/011:03:220
2227899923,38cyclictest0-21swapper/008:31:310
2227899915,36cyclictest0-21swapper/009:21:330
2227899914,36cyclictest0-21swapper/008:16:340
2227899914,36cyclictest0-21swapper/008:16:340
2227899914,13cyclictest0-21swapper/010:36:160
22278999130,10cyclictest6828-21unixbench_singl09:06:310
22278999121,23cyclictest0-21swapper/008:29:120
2228199903,79cyclictest12758-21ssh08:28:422
2228199903,67cyclictest0-21swapper/207:59:112
2227899906,34cyclictest0-21swapper/008:21:260
22278999041,43cyclictest0-21swapper/010:24:080
2227899904,34cyclictest0-21swapper/007:26:320
2227899904,27cyclictest0-21swapper/010:11:140
2227899904,27cyclictest0-21swapper/005:51:170
22278999027,13cyclictest0-21swapper/008:46:090
22278999020,12cyclictest0-21swapper/009:03:170
22278999019,12cyclictest0-21swapper/006:36:170
248599890,4rtkit-daemon2484-21rtkit-daemon05:46:243
2228199893,77cyclictest0-21swapper/209:17:382
2228199893,65cyclictest0-21swapper/207:46:172
2228199893,44cyclictest0-21swapper/208:36:122
2227899894,40cyclictest0-21swapper/010:16:080
2227899894,40cyclictest0-21swapper/010:16:080
2227899894,34cyclictest0-21swapper/010:06:210
2227899894,34cyclictest0-21swapper/005:56:330
2227899894,26cyclictest0-21swapper/009:16:110
2227899894,14cyclictest0-21swapper/011:11:060
22278998935,46cyclictest0-21swapper/010:41:200
22278998934,12cyclictest31347-21grep06:01:380
22278998930,12cyclictest0-21swapper/008:56:230
22278998930,12cyclictest0-21swapper/008:56:230
2228199883,65cyclictest0-21swapper/208:46:162
2227899885,27cyclictest0-21swapper/008:00:460
2227899884,33cyclictest0-21swapper/006:51:170
2227899884,33cyclictest0-21swapper/006:51:170
2227899884,25cyclictest0-21swapper/010:50:250
22278998838,43cyclictest0-21swapper/008:11:220
22278998837,10cyclictest0-21swapper/010:33:180
22278998821,12cyclictest0-21swapper/007:36:120
22278998819,12cyclictest0-21swapper/009:43:000
2228199873,63cyclictest0-21swapper/208:51:182
2228199873,63cyclictest0-21swapper/208:04:272
2227899874,26cyclictest0-21swapper/010:58:090
22278998730,12cyclictest0-21swapper/007:46:560
2228199865,73cyclictest0-21swapper/210:49:552
2228199865,64cyclictest0-21swapper/207:51:332
2228199864,75cyclictest0-21swapper/208:44:242
2228199864,75cyclictest0-21swapper/206:56:032
2228199864,75cyclictest0-21swapper/206:56:032
2228199864,74cyclictest0-21swapper/209:46:252
2228199864,74cyclictest0-21swapper/207:21:242
2228199864,63cyclictest0-21swapper/209:13:172
2228199864,63cyclictest0-21swapper/208:11:122
2228199864,61cyclictest1419-21runrttasks09:01:082
2228199863,76cyclictest373-21ssh10:35:202
2228199863,75cyclictest3444-21ssh10:38:282
2228199863,67cyclictest0-21swapper/210:51:042
2228199863,67cyclictest0-21swapper/210:51:042
2228199863,67cyclictest0-21swapper/209:07:392
2228199863,63cyclictest0-21swapper/208:24:152
2228199855,72cyclictest0-21swapper/210:12:512
2228199854,64cyclictest0-21swapper/210:01:122
2228199853,74cyclictest0-21swapper/210:23:252
2228199853,73cyclictest0-21swapper/209:24:002
2228199853,61cyclictest0-21swapper/210:08:112
2228199844,72cyclictest0-21swapper/209:26:452
2228199844,63cyclictest25251-21tune2fs11:11:092
2228199844,46cyclictest26716-21fschecks_time07:01:212
2228199843,62cyclictest0-21swapper/209:38:362
2228199834,60cyclictest0-21swapper/208:07:362
2228199834,47cyclictest0-21swapper/208:34:562
2228199833,72cyclictest0-21swapper/208:20:562
2228199833,72cyclictest0-21swapper/208:20:562
2228199833,71cyclictest0-21swapper/206:21:042
2228199833,64cyclictest0-21swapper/206:31:142
2228199833,48cyclictest20569-21grep06:46:352
2227899834,38cyclictest0-21swapper/007:11:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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