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2026-07-11 - 20:47

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 Sat Jul 11, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
283021180,7sleep02829-21grep10:04:330
283021180,7sleep02829-21grep10:04:330
8140999624,14cyclictest0-21swapper/010:38:560
814099954,84cyclictest0-21swapper/011:39:280
814099914,26cyclictest0-21swapper/010:31:160
814099914,16cyclictest0-21swapper/006:44:190
219499910,13rtkit-daemon2193-21rtkit-daemon06:34:263
8140999010,72cyclictest0-21swapper/008:34:180
814099894,77cyclictest0-21swapper/010:49:140
814099894,32cyclictest0-21swapper/010:46:470
814099884,35cyclictest17451-21proc_pri11:14:250
814099884,32cyclictest0-21swapper/009:29:030
814099884,32cyclictest0-21swapper/009:29:030
814099875,11cyclictest0-21swapper/009:49:170
814099874,75cyclictest0-21swapper/008:31:220
814099874,32cyclictest0-21swapper/008:54:180
814099874,31cyclictest0-21swapper/009:44:200
814099874,12cyclictest0-21swapper/008:49:550
8140998722,11cyclictest1295-21unixbench_multi09:14:350
814099865,25cyclictest0-21swapper/010:59:310
814099864,31cyclictest0-21swapper/009:34:210
814099864,31cyclictest0-21swapper/009:25:270
814099864,31cyclictest0-21swapper/009:25:270
814099864,12cyclictest0-21swapper/011:44:460
814099864,12cyclictest0-21swapper/009:04:010
814099863,32cyclictest0-21swapper/008:39:220
814099863,29cyclictest4176-21yum-updatesd-he10:09:110
814099863,29cyclictest4176-21yum-updatesd-he10:09:110
8140998617,7cyclictest692-21diskmemload10:39:110
8140998611,31cyclictest0-21swapper/009:54:330
814099854,35cyclictest0-21swapper/009:59:200
814099854,25cyclictest0-21swapper/010:27:540
814099854,12cyclictest0-21swapper/010:23:370
814099853,35cyclictest0-21swapper/011:54:090
8140998524,9cyclictest1227-21runrttasks07:09:170
814099844,37cyclictest0-21swapper/009:09:310
814099844,34cyclictest0-21swapper/011:19:190
814099844,32cyclictest0-21swapper/011:29:190
814099844,32cyclictest0-21swapper/011:29:190
814099844,31cyclictest0-21swapper/008:44:350
814099844,31cyclictest0-21swapper/008:44:350
814099844,31cyclictest0-21swapper/007:24:370
814099844,31cyclictest0-21swapper/007:24:370
814099844,30cyclictest0-21swapper/011:53:370
814099843,12cyclictest0-21swapper/010:54:240
8140998417,10cyclictest107550irq/46-eth011:25:120
814099835,34cyclictest0-21swapper/011:09:530
814099834,12cyclictest0-21swapper/009:19:290
814099834,11cyclictest0-21swapper/011:05:350
814099833,26cyclictest0-21swapper/009:39:330
8140998323,10cyclictest8730-21cpuspeed_turbos06:29:210
8140998228,13cyclictest0-21swapper/006:49:200
8140998223,12cyclictest0-21swapper/011:34:080
814099814,32cyclictest0-21swapper/009:04:240
814099814,11cyclictest0-21swapper/010:14:240
8140998120,13cyclictest0-21swapper/007:14:200
814099804,30cyclictest15162-21gltestperf07:49:220
814099803,31cyclictest17940-21ntp_offset07:54:300
8140998021,11cyclictest22459-21systemd-cgroups06:59:060
814099795,9cyclictest0-21swapper/007:04:190
814099793,33cyclictest0-21swapper/007:59:280
8140997919,16cyclictest29885-21ntpq08:19:300
814099784,34cyclictest0-21swapper/008:04:210
8140997728,10cyclictest8330-21strings07:34:290
219499740,25rtkit-daemon2193-21rtkit-daemon06:29:333
814099714,31cyclictest0-21swapper/008:14:150
814099693,30cyclictest23584-21yum-updatesd-he08:09:130
814599674,55cyclictest0-21swapper/206:49:372
128602670,10sleep1201ktimersoftd/108:44:311
128602670,10sleep1201ktimersoftd/108:44:311
814599654,52cyclictest0-21swapper/208:54:192
814599653,54cyclictest12400-21missed_timers10:19:232
814699644,39cyclictest0-21swapper/309:57:553
8146996424,20cyclictest30164-21cat09:09:333
8144996446,8cyclictest30028-21ssh09:59:101
8144996432,10cyclictest24361-21kernelversion09:49:241
8144996328,13cyclictest32278-21fschecks_time10:49:161
236952633,12sleep20-21swapper/206:59:282
219499630,5rtkit-daemon2193-21rtkit-daemon07:39:163
17782632,54sleep20-21swapper/207:21:252
814699625,48cyclictest0-21swapper/309:14:203
814599624,50cyclictest0-21swapper/209:54:322
814599623,51cyclictest0-21swapper/211:49:252
814599623,51cyclictest0-21swapper/211:08:572
814599623,51cyclictest0-21swapper/210:29:092
814599623,51cyclictest0-21swapper/209:49:172
814599623,51cyclictest0-21swapper/208:09:102
8144996245,12cyclictest0-21swapper/110:24:231
8144996221,23cyclictest7721-21cut11:49:101
640726214,40sleep20-21swapper/209:24:122
640726214,40sleep20-21swapper/209:24:122
814599614,49cyclictest0-21swapper/211:39:182
814599614,48cyclictest0-21swapper/209:34:162
814599613,51cyclictest0-21swapper/211:34:202
814599613,50cyclictest334-21grep09:14:202
814599613,50cyclictest0-21swapper/210:54:212
814599613,50cyclictest0-21swapper/210:09:022
814599613,50cyclictest0-21swapper/210:09:022
814599613,50cyclictest0-21swapper/209:59:162
814599613,50cyclictest0-21swapper/209:19:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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