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2026-01-11 - 11:20

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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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 Sun Jan 11, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2485991210,6rtkit-daemon2484-21rtkit-daemon23:05:280
6067999711,61cyclictest0-21swapper/122:50:371
606799944,25cyclictest0-21swapper/123:40:581
606799924,26cyclictest0-21swapper/121:19:301
6067999221,9cyclictest1419-21runrttasks21:01:131
606799904,28cyclictest0-21swapper/121:53:081
606799903,31cyclictest0-21swapper/119:29:091
606799897,21cyclictest0-21swapper/121:32:171
6067998930,51cyclictest20927-21fgrep21:13:191
606799893,78cyclictest12267-21strings18:53:181
606799885,65cyclictest0-21swapper/123:34:361
606799884,26cyclictest0-21swapper/121:10:531
606799884,11cyclictest0-21swapper/123:57:571
606799883,25cyclictest0-21swapper/121:03:101
6067998819,9cyclictest47852tail21:38:071
606799877,21cyclictest0-21swapper/122:25:191
606799874,24cyclictest0-21swapper/122:03:481
606799864,26cyclictest0-21swapper/120:46:261
606799864,25cyclictest0-21swapper/123:18:521
6067998625,55cyclictest10598-21gltestperf23:23:031
248599860,5rtkit-daemon2484-21rtkit-daemon21:51:230
606799854,27cyclictest0-21swapper/123:12:451
606799854,26cyclictest0-21swapper/121:33:041
606799854,25cyclictest0-21swapper/121:44:241
606799853,25cyclictest7205-21latency_hist19:52:541
606799844,25cyclictest0-21swapper/121:49:291
606799844,23cyclictest0-21swapper/122:32:571
606799844,23cyclictest0-21swapper/122:32:571
606799843,29cyclictest0-21swapper/122:38:071
606799843,27cyclictest0-21swapper/123:53:131
606799843,27cyclictest0-21swapper/123:53:131
298402840,5sleep041ktimersoftd/022:15:330
606799837,20cyclictest0-21swapper/123:31:291
606799834,71cyclictest0-21swapper/122:43:071
606799834,24cyclictest0-21swapper/120:33:041
606799834,21cyclictest0-21swapper/123:03:411
606799834,12cyclictest0-21swapper/120:14:191
606799833,26cyclictest0-21swapper/122:54:141
606799833,26cyclictest0-21swapper/122:17:241
606799825,21cyclictest0-21swapper/123:00:341
606799824,70cyclictest0-21swapper/120:08:221
6067998219,13cyclictest0-21swapper/121:57:581
6067998219,12cyclictest0-21swapper/122:31:011
6067998219,12cyclictest0-21swapper/122:31:011
606799814,25cyclictest0-21swapper/120:54:431
606799814,24cyclictest0-21swapper/120:50:131
606799814,12cyclictest0-21swapper/122:08:051
606799813,26cyclictest0-21swapper/100:12:431
606799813,13cyclictest7279-21crond00:07:421
6067998110,14cyclictest0-21swapper/122:18:121
606799809,24cyclictest22769-21awk19:17:541
606799803,20cyclictest0-21swapper/123:15:021
606799803,20cyclictest0-21swapper/123:15:021
6067998012,16cyclictest0-21swapper/118:58:271
606799794,29cyclictest0-21swapper/123:50:031
606799794,27cyclictest0-21swapper/119:23:261
606799793,8cyclictest26727-21ssh21:23:051
6067997926,46cyclictest23180-21fgrep20:23:201
6067997922,9cyclictest29996-21latency20:38:141
6067997921,8cyclictest1419-21runrttasks19:39:081
6067997920,9cyclictest4430-21unixbench_singl19:43:291
6067997920,9cyclictest4430-21unixbench_singl19:43:291
6067997917,10cyclictest7987-21unixbench_multi18:43:281
6067997912,12cyclictest0-21swapper/123:43:101
6067997823,9cyclictest12261-21aten_r1power_en20:03:031
6067997810,14cyclictest0-21swapper/119:53:121
606799774,12cyclictest0-21swapper/119:21:131
6067997721,9cyclictest18299-21aten_r1power_fr19:08:041
606799764,13cyclictest0-21swapper/119:58:041
6067997624,45cyclictest0-21swapper/120:28:221
6067997624,45cyclictest0-21swapper/120:28:221
6067997621,9cyclictest9402-21fschecks_time18:48:111
6067997619,9cyclictest31854-21unixbench_multi19:33:271
6067997522,7cyclictest19933-21df_abs20:18:071
606799743,24cyclictest0-21swapper/119:03:231
606799743,24cyclictest0-21swapper/119:03:231
6069997314,51cyclictest0-21swapper/222:32:562
6069997314,51cyclictest0-21swapper/222:32:562
248599710,5rtkit-daemon0-21swapper/300:03:410
6064996937,12cyclictest0-21swapper/022:03:190
6064996841,10cyclictest26495-21grep21:23:030
6064996837,13cyclictest0-21swapper/022:38:120
606999673,57cyclictest0-21swapper/200:08:052
6064996637,13cyclictest0-21swapper/023:14:510
6064996637,13cyclictest0-21swapper/023:14:510
606999655,52cyclictest0-21swapper/221:08:152
6064996519,15cyclictest0-21swapper/023:33:240
248599650,4rtkit-daemon2484-21rtkit-daemon23:12:050
606999644,52cyclictest0-21swapper/223:33:062
606999643,12cyclictest0-21swapper/222:13:082
606999643,12cyclictest0-21swapper/220:58:142
6064996437,12cyclictest0-21swapper/022:28:160
6064996437,12cyclictest0-21swapper/022:28:160
6064996435,13cyclictest0-21swapper/020:58:080
6064996433,11cyclictest0-21swapper/023:42:550
6064996432,9cyclictest3723-21yum-updatesd-he22:23:340
6064996344,12cyclictest11624-21yum-updatesd-he23:23:430
6064996322,21cyclictest2379-21sort23:58:150
607099624,51cyclictest0-21swapper/319:23:223
607099624,51cyclictest0-21swapper/319:02:543
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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