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2026-07-08 - 18:49

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 Jul 08, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1632499974,86cyclictest0-21swapper/009:31:500
1632999967,38cyclictest0-21swapper/109:37:161
16329999621,31cyclictest29405-21gltestperf10:37:061
16329999621,31cyclictest29405-21gltestperf10:37:061
1632499944,26cyclictest0-21swapper/011:31:540
1632499934,30cyclictest0-21swapper/009:53:330
16324999332,54cyclictest21662-21grep11:12:190
1632499923,81cyclictest0-21swapper/010:07:190
1632999915,37cyclictest0-21swapper/111:07:011
1632999915,36cyclictest0-21swapper/111:42:191
1632499915,79cyclictest0-21swapper/009:57:150
1632499915,79cyclictest0-21swapper/009:57:150
1632999894,11cyclictest7573-21munin-node10:52:091
16329998921,9cyclictest19902-21cat07:46:531
1632499894,79cyclictest0-21swapper/009:01:430
1632499893,8cyclictest4292-21netstat10:47:110
1632499893,33cyclictest0-21swapper/007:27:090
1632499875,12cyclictest0-21swapper/009:44:340
1632499874,36cyclictest0-21swapper/011:51:300
1632499874,32cyclictest0-21swapper/009:17:170
1632499873,76cyclictest0-21swapper/011:52:020
1632499873,76cyclictest0-21swapper/010:37:080
1632499873,76cyclictest0-21swapper/010:37:080
1632499873,21cyclictest9070-21diskmemload09:26:140
1632999866,36cyclictest0-21swapper/111:02:141
1632999865,35cyclictest0-21swapper/110:47:011
1632499864,75cyclictest0-21swapper/009:07:170
1632499864,75cyclictest0-21swapper/009:07:170
1632499863,34cyclictest0-21swapper/011:04:530
1632499863,31cyclictest18015-21python11:07:160
1632999854,74cyclictest0-21swapper/110:12:131
16329998520,9cyclictest31789-21latency_hist08:11:531
1632499854,34cyclictest0-21swapper/008:32:050
1632499854,31cyclictest0-21swapper/009:47:010
16324998530,48cyclictest0-21swapper/010:27:150
1632499853,30cyclictest10615-21grep10:57:030
1632499844,32cyclictest0-21swapper/010:12:000
1632499843,38cyclictest0-21swapper/011:58:080
1632499843,38cyclictest0-21swapper/011:58:080
1632499843,34cyclictest0-21swapper/011:44:420
1632999834,34cyclictest0-21swapper/111:17:031
1632999834,34cyclictest0-21swapper/111:17:031
1632999834,27cyclictest0-21swapper/111:38:231
1632499835,12cyclictest0-21swapper/010:17:170
1632499834,32cyclictest0-21swapper/010:02:210
1632499834,31cyclictest0-21swapper/010:42:080
1632499834,30cyclictest0-21swapper/009:12:160
1632499834,30cyclictest0-21swapper/009:12:160
1632499834,28cyclictest16432-21tr08:42:040
1632499834,12cyclictest0-21swapper/011:26:590
16324998330,47cyclictest1716-21grep07:07:150
16324998330,47cyclictest1716-21grep07:07:150
16324998330,10cyclictest30295-21tune2fs08:07:110
1632499833,33cyclictest0-21swapper/010:26:020
1632499833,30cyclictest0-21swapper/006:57:120
1632499833,29cyclictest0-21swapper/010:52:000
1632499833,26cyclictest0-21swapper/008:47:060
1632499833,10cyclictest0-21swapper/009:40:200
16324998325,8cyclictest1227-21runrttasks08:41:190
16324998325,8cyclictest1227-21runrttasks08:41:190
16324998324,8cyclictest17545-21entropy09:32:060
16324998321,11cyclictest0-21swapper/008:52:030
1632999825,34cyclictest0-21swapper/110:31:471
1632999825,31cyclictest0-21swapper/110:57:151
1632999825,14cyclictest1227-21runrttasks10:02:011
1632999824,38cyclictest0-21swapper/108:47:101
16329998219,9cyclictest25952-21cat06:51:551
1632499824,32cyclictest0-21swapper/011:21:570
1632499824,29cyclictest0-21swapper/008:21:520
1632499824,25cyclictest0-21swapper/008:02:140
1632499823,31cyclictest24633-21turbostat07:56:520
1632499822,10cyclictest4890-21ssh11:36:580
16324998219,14cyclictest0-21swapper/009:04:470
1632499815,32cyclictest0-21swapper/006:47:090
1632499814,35cyclictest0-21swapper/007:16:540
1632499814,35cyclictest0-21swapper/007:16:540
1632499814,32cyclictest0-21swapper/010:32:250
1632499813,11cyclictest0-21swapper/011:17:580
1632499813,11cyclictest0-21swapper/011:17:580
159922810,10sleep30-21swapper/307:37:113
1632499804,29cyclictest8444-21tr07:22:060
1632499803,34cyclictest0-21swapper/007:57:150
16324997925,9cyclictest4670-21head08:22:050
16324997920,11cyclictest0-21swapper/006:43:590
219499780,27rtkit-daemon2193-21rtkit-daemon08:20:593
16324997831,41cyclictest26423-21cpuspeed_turbos06:52:090
1632499782,25cyclictest0-21swapper/007:46:530
1632999775,27cyclictest0-21swapper/109:04:591
1632999774,26cyclictest0-21swapper/109:01:201
16329997715,23cyclictest0-21swapper/106:32:091
1632999764,35cyclictest0-21swapper/110:11:481
16324997524,11cyclictest0-21swapper/008:27:210
16324997523,10cyclictest0-21swapper/007:32:300
1632499743,8cyclictest21085-21latency_hist06:41:550
16324997423,8cyclictest32742-21fschecks_time08:12:100
16324997421,11cyclictest0-21swapper/006:32:280
255752720,3sleep2281ktimersoftd/211:19:002
255752720,3sleep2281ktimersoftd/211:19:002
219499710,7rtkit-daemon0-21swapper/307:00:403
1632499703,32cyclictest0-21swapper/007:17:080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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