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2026-05-02 - 06:47

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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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 50 highest latencies:
System rack1slot6s.osadl.org (updated Sat May 02, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2390221280,4sleep1201ktimersoftd/120:15:451
20442970,4sleep118-21rcuc/118:54:091
248599830,4rtkit-daemon2484-21rtkit-daemon20:42:331
248599820,27rtkit-daemon2583-21diskmemload20:49:331
248599810,24rtkit-daemon0-21swapper/018:09:021
248599780,26rtkit-daemon0-21swapper/021:09:021
248599780,26rtkit-daemon0-21swapper/019:19:291
248599780,26rtkit-daemon0-21swapper/019:08:071
248599780,26rtkit-daemon0-21swapper/019:08:071
248599780,26rtkit-daemon0-21swapper/017:03:421
248599780,25rtkit-daemon2583-21diskmemload19:14:591
248599780,25rtkit-daemon13648-21strings17:04:051
248599770,26rtkit-daemon0-21swapper/020:56:331
248599770,26rtkit-daemon0-21swapper/019:09:301
248599770,24rtkit-daemon0-21swapper/019:00:001
248599750,5rtkit-daemon10045-21systemd-cgroups16:58:420
248599750,24rtkit-daemon0-21swapper/017:35:411
984199743,64cyclictest1419-21runrttasks21:27:291
248599730,23rtkit-daemon0-21swapper/017:29:191
248599710,22rtkit-daemon0-21swapper/017:41:111
248599710,22rtkit-daemon0-21swapper/017:41:111
9842997041,13cyclictest0-21swapper/220:33:502
85832690,3sleep3361ktimersoftd/319:05:443
85832690,3sleep3361ktimersoftd/319:05:443
248599690,4rtkit-daemon2484-21rtkit-daemon19:42:363
984199685,56cyclictest0-21swapper/121:29:011
248599660,7rtkit-daemon0-21swapper/322:09:083
248599660,6rtkit-daemon0-21swapper/322:07:303
248599660,6rtkit-daemon0-21swapper/320:30:343
248599660,6rtkit-daemon0-21swapper/020:58:481
248599660,5rtkit-daemon2484-21rtkit-daemon19:45:063
248599660,5rtkit-daemon2484-21rtkit-daemon19:45:063
248599660,4rtkit-daemon2484-21rtkit-daemon21:13:023
248599660,4rtkit-daemon2484-21rtkit-daemon19:56:353
984199654,53cyclictest0-21swapper/120:18:531
248599650,8rtkit-daemon0-21swapper/320:40:493
248599650,7rtkit-daemon0-21swapper/322:25:073
248599650,7rtkit-daemon0-21swapper/322:25:073
248599650,7rtkit-daemon0-21swapper/319:59:503
248599650,6rtkit-daemon2484-21rtkit-daemon19:31:293
248599650,6rtkit-daemon0-21swapper/322:21:303
248599650,6rtkit-daemon0-21swapper/322:16:223
248599650,6rtkit-daemon0-21swapper/321:41:543
248599650,6rtkit-daemon0-21swapper/320:26:343
248599650,6rtkit-daemon0-21swapper/320:26:343
248599650,6rtkit-daemon0-21swapper/320:12:273
248599650,5rtkit-daemon0-21swapper/321:26:323
984199645,53cyclictest0-21swapper/122:03:441
984199643,55cyclictest0-21swapper/121:49:021
984199643,54cyclictest0-21swapper/120:43:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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