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2026-06-11 - 05:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Thu Jun 11, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
71212213184,19sleep30-21swapper/319:09:493
70822204167,24sleep10-21swapper/119:09:201
67852202163,26sleep20-21swapper/219:05:302
69792201163,26sleep00-21swapper/019:07:580
3098621480,5sleep3724199cyclictest22:28:383
3098621480,5sleep3724199cyclictest22:28:383
7236999693,2cyclictest0-21swapper/222:32:492
7236996966,2cyclictest0-21swapper/200:39:052
232602640,5sleep3724199cyclictest23:25:133
7236995249,2cyclictest0-21swapper/219:10:052
71512500,4sleep121-21rcuc/100:00:191
147102490,1sleep014711-21cat21:50:190
249592470,1sleep30-21swapper/319:45:243
319422460,2sleep30-21swapper/322:30:153
722599378,13cyclictest17910-21munin-run22:00:020
7225993711,12cyclictest6302-21munin-run20:20:000
21622350,2sleep20-21swapper/222:35:202
723099331,11cyclictest0-21swapper/122:54:371
723099321,12cyclictest0-21swapper/122:00:571
722599328,11cyclictest27652-21idleruntime-cro19:55:010
723099311,6cyclictest0-21swapper/119:15:371
723099311,13cyclictest0-21swapper/100:32:451
722599318,11cyclictest22326-21perf22:10:010
722599312,14cyclictest4106-21munin-run20:15:010
723099301,13cyclictest0-21swapper/122:35:231
723099301,13cyclictest0-21swapper/121:30:291
723099301,12cyclictest0-21swapper/123:28:361
723099301,11cyclictest0-21swapper/122:24:051
723099291,9cyclictest0-21swapper/120:32:391
723099291,12cyclictest0-21swapper/123:57:201
723099291,12cyclictest0-21swapper/121:29:531
723099291,11cyclictest0-21swapper/123:31:481
723099291,10cyclictest0-21swapper/121:02:191
723099291,10cyclictest0-21swapper/119:10:031
722599297,10cyclictest0-21swapper/022:30:000
722599297,10cyclictest0-21swapper/022:30:000
7225992910,16cyclictest29865-21munin-run20:00:010
723099281,9cyclictest0-21swapper/121:20:491
723099281,24cyclictest10878-21memory22:55:191
723099281,13cyclictest0-21swapper/120:07:451
723099281,13cyclictest0-21swapper/120:07:451
723099281,11cyclictest0-21swapper/119:32:491
723099281,11cyclictest0-21swapper/100:16:011
723099281,10cyclictest0-21swapper/119:23:221
723099280,11cyclictest0-21swapper/120:47:261
722599280,13cyclictest4736-21idleruntime-cro21:30:010
724199275,8cyclictest0-21swapper/300:26:173
723099278,7cyclictest31522-21irqstats21:15:171
723099278,7cyclictest31522-21irqstats21:15:171
723099271,9cyclictest22489-21/usr/sbin/munin20:55:141
723099271,8cyclictest0-21swapper/123:04:511
723099271,14cyclictest14712-21df_inode23:05:111
723099271,12cyclictest0-21swapper/122:16:371
723099271,12cyclictest0-21swapper/120:29:251
723099271,11cyclictest0-21swapper/100:20:571
723099271,11cyclictest0-21swapper/100:06:171
723099271,10cyclictest0-21swapper/121:10:571
723099271,10cyclictest0-21swapper/120:04:351
723099270,10cyclictest0-21swapper/121:39:471
722599271,12cyclictest31732-21awk23:45:010
723099269,7cyclictest0-21swapper/121:48:511
723099262,12cyclictest3373-21users23:50:241
723099261,9cyclictest0-21swapper/123:11:391
723099261,8cyclictest29233-21expr22:25:111
723099261,8cyclictest29233-21expr22:25:111
723099261,8cyclictest0-21swapper/123:18:551
723099261,16cyclictest0-21swapper/100:11:131
723099261,11cyclictest0-21swapper/123:40:521
723099260,11cyclictest0-21swapper/121:05:031
723099251,9cyclictest0-21swapper/122:47:171
723099251,9cyclictest0-21swapper/122:33:011
723099251,8cyclictest0-21swapper/120:42:081
7230992512,5cyclictest27338-21systemd-journal19:51:021
723099251,21cyclictest15713-21/usr/sbin/munin21:55:021
723099251,11cyclictest0-21swapper/121:42:311
723099251,11cyclictest0-21swapper/120:52:521
723099251,10cyclictest28285-21diskmemload00:26:371
723099251,10cyclictest0-21swapper/123:39:491
723099251,10cyclictest0-21swapper/123:39:481
723099251,10cyclictest0-21swapper/122:05:251
723099251,10cyclictest0-21swapper/119:44:491
723099250,10cyclictest0-21swapper/119:59:391
722599251,8cyclictest0-21swapper/022:23:210
7225992510,14cyclictest0-21swapper/000:05:020
724199246,10cyclictest0-21swapper/322:36:093
724199245,6cyclictest8564-1kworker/u9:123:00:203
7236992419,3cyclictest23882-21tune2fs19:45:142
723699241,5cyclictest1469-21sed20:05:252
723699241,5cyclictest1469-21sed20:05:252
723699241,11cyclictest0-21swapper/222:21:452
723099241,9cyclictest0-21swapper/120:24:151
723099241,9cyclictest0-21swapper/120:16:471
723099241,8cyclictest0-21swapper/119:28:151
723099241,10cyclictest0-21swapper/123:47:201
723099241,10cyclictest0-21swapper/122:13:431
723099241,10cyclictest0-21swapper/100:37:011
722599247,15cyclictest20131-21awk22:05:010
723699231,6cyclictest0-21swapper/222:53:462
7236992314,7cyclictest28285-21diskmemload22:28:382
7236992314,7cyclictest28285-21diskmemload22:28:382
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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