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2026-08-10 - 20:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot5s.osadl.org (updated Mon Aug 10, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13115992723,0cyclictest7261-21diskmemload10:40:030
13124992523,1cyclictest0-21swapper/210:14:172
1312499250,24cyclictest17701-21ssh11:44:082
1312499250,0cyclictest0-21swapper/209:42:432
13119992524,1cyclictest0-21swapper/110:21:111
1311999250,24cyclictest0-21swapper/112:36:391
1311999250,24cyclictest0-21swapper/110:14:241
1311599250,24cyclictest0-21swapper/012:08:510
13129992423,0cyclictest0-21swapper/310:34:563
1312999240,23cyclictest7261-21diskmemload12:13:193
13124992422,1cyclictest31700-21ssh09:32:132
13124992422,1cyclictest17017-21ssh10:16:122
13124992422,1cyclictest0-21swapper/212:06:442
13124992420,2cyclictest3143-21rm10:33:452
13119992424,0cyclictest20314-21kworker/1:110:53:391
13119992422,1cyclictest0-21swapper/110:03:271
1311999240,24cyclictest0-21swapper/109:37:491
1311999240,23cyclictest7261-21diskmemload12:32:551
1311999240,23cyclictest0-21swapper/112:26:091
1311999240,23cyclictest0-21swapper/111:57:101
1311999240,23cyclictest0-21swapper/111:00:151
1311999240,23cyclictest0-21swapper/109:54:171
13115992423,1cyclictest0-21swapper/011:10:120
1311599242,21cyclictest62550irq/127-eno109:30:310
13115992422,1cyclictest0-21swapper/009:21:270
13115992421,2cyclictest17317-21sh10:45:050
13129992323,0cyclictest7261-21diskmemload10:42:203
13129992323,0cyclictest0-21swapper/311:51:203
13129992323,0cyclictest0-21swapper/311:46:483
13129992323,0cyclictest0-21swapper/311:40:523
13129992323,0cyclictest0-21swapper/309:36:293
13129992321,1cyclictest28612-21sh10:26:523
1312999230,23cyclictest0-21swapper/311:35:043
1312999230,23cyclictest0-21swapper/311:24:253
1312999230,23cyclictest0-21swapper/311:24:253
1312999230,23cyclictest0-21swapper/310:46:013
1312999230,23cyclictest0-21swapper/310:10:073
1312999230,22cyclictest7261-21diskmemload09:52:513
1312999230,22cyclictest5282-21ssh11:32:343
1312999230,22cyclictest425-21sh09:33:503
1312999230,22cyclictest23579-21ssh10:22:333
1312999230,22cyclictest23140-21cat07:30:013
1312999230,22cyclictest20673-21ssh09:22:243
1312999230,22cyclictest15209-21ssh09:45:203
1312999230,21cyclictest7261-21diskmemload12:01:143
1312999230,0cyclictest7261-21diskmemload10:07:263
1312999230,0cyclictest7261-21diskmemload09:18:583
1312999230,0cyclictest0-21swapper/312:31:033
13124992323,0cyclictest0-21swapper/212:18:362
13124992323,0cyclictest0-21swapper/211:27:572
13124992323,0cyclictest0-21swapper/211:12:372
13124992323,0cyclictest0-21swapper/211:07:152
13124992323,0cyclictest0-21swapper/210:01:272
13124992323,0cyclictest0-21swapper/209:59:412
13124992323,0cyclictest0-21swapper/209:46:372
13124992323,0cyclictest0-21swapper/208:29:222
13124992322,0cyclictest0-21swapper/212:20:162
13124992321,1cyclictest12805-21sh08:15:012
13124992321,1cyclictest0-21swapper/209:21:392
13124992320,2cyclictest21158-21sh09:50:522
1312499230,23cyclictest0-21swapper/210:43:012
1312499230,23cyclictest0-21swapper/210:23:332
1312499230,22cyclictest7261-21diskmemload09:15:122
1312499230,22cyclictest28799-21taskset10:55:182
1312499230,22cyclictest2445-21idleruntime-cro09:00:012
1312499230,22cyclictest1923-21ssh12:27:022
1312499230,22cyclictest0-21swapper/211:36:362
1312499230,22cyclictest0-21swapper/211:31:562
1312499230,22cyclictest0-21swapper/211:15:252
1312499230,22cyclictest0-21swapper/209:13:022
1312499230,0cyclictest7261-21diskmemload09:29:452
1312499230,0cyclictest0-21swapper/212:03:552
1312499230,0cyclictest0-21swapper/210:54:402
13119992323,0cyclictest7261-21diskmemload10:34:271
13119992323,0cyclictest7261-21diskmemload09:49:491
13119992323,0cyclictest0-21swapper/111:21:521
13119992323,0cyclictest0-21swapper/111:21:521
13119992323,0cyclictest0-21swapper/110:59:041
13119992323,0cyclictest0-21swapper/110:43:491
13119992322,1cyclictest7261-21diskmemload10:36:181
13119992322,0cyclictest0-21swapper/112:20:491
13119992321,1cyclictest0-21swapper/111:39:271
13119992321,1cyclictest0-21swapper/111:33:141
1311999230,23cyclictest0-21swapper/110:28:481
1311999230,22cyclictest9927-21rm12:04:421
1311999230,22cyclictest5368-21diskmemload10:05:451
1311999230,22cyclictest30789-21dump-pmu-power07:45:001
1311999230,22cyclictest27642-21dump-pmu-power08:45:001
1311999230,22cyclictest27382-21diskmemload11:52:041
1311999230,22cyclictest25859-21awk07:35:011
1311999230,22cyclictest23124-21ssh11:19:271
1311999230,22cyclictest23020-21ssh11:48:491
1311999230,22cyclictest21435-21perf10:20:001
1311999230,22cyclictest13517-21sh12:09:201
1311999230,22cyclictest13364-21sh09:15:021
1311999230,22cyclictest1-21systemd09:25:001
1311999230,22cyclictest0-21swapper/111:05:231
1311999230,22cyclictest0-21swapper/109:11:541
1311999230,0cyclictest0-21swapper/112:15:091
1311999230,0cyclictest0-21swapper/109:25:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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