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2026-03-13 - 06:11

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 Fri Mar 13, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
169742980,3sleep041ktimersoftd/020:05:230
197702930,3sleep2281ktimersoftd/220:08:072
197702930,3sleep2281ktimersoftd/220:08:072
1038899923,10cyclictest0-21swapper/120:20:481
10388999117,48cyclictest23875-21munin-node21:50:421
1038899904,79cyclictest0-21swapper/121:55:501
1038899904,63cyclictest0-21swapper/118:24:561
1038899903,63cyclictest18824-21sh20:55:401
1038899898,58cyclictest0-21swapper/120:06:221
1038899898,58cyclictest0-21swapper/120:06:221
1038899894,76cyclictest0-21swapper/118:15:361
10388998910,57cyclictest0-21swapper/119:46:061
1038899885,73cyclictest0-21swapper/122:30:401
1038899884,60cyclictest0-21swapper/119:55:441
1038899883,11cyclictest0-21swapper/121:05:471
10388998816,53cyclictest9027-21munin-node22:15:491
10388998816,53cyclictest9027-21munin-node22:15:491
1038899877,69cyclictest0-21swapper/121:41:011
1038899875,67cyclictest0-21swapper/122:53:101
1038899875,61cyclictest0-21swapper/122:40:251
1038899874,75cyclictest0-21swapper/122:30:261
1038899874,75cyclictest0-21swapper/122:22:521
1038899874,74cyclictest0-21swapper/123:10:381
1038899873,9cyclictest32350-21head21:15:411
1038899873,9cyclictest29693-21grep21:10:481
1038899873,73cyclictest14954-21timerandwakeup21:36:001
1038899873,73cyclictest14954-21timerandwakeup21:36:001
10388998711,52cyclictest0-21swapper/118:55:351
1038899865,64cyclictest0-21swapper/123:03:301
1038899864,8cyclictest25681-21swap20:16:031
1038899864,57cyclictest0-21swapper/117:45:551
1038899864,12cyclictest0-21swapper/122:41:091
1038899863,8cyclictest3246-21fschecks_count22:55:421
1038899863,8cyclictest3246-21fschecks_count22:55:421
1038899863,8cyclictest22160-21munin-node21:00:411
1038899863,7cyclictest1419-21runrttasks20:39:101
1038899858,59cyclictest121850irq/46-eth022:11:111
1038899855,61cyclictest22167-21proc_pri20:11:001
1038899854,74cyclictest0-21swapper/122:00:421
1038899854,73cyclictest0-21swapper/120:00:561
1038899854,13cyclictest0-21swapper/120:31:001
1038899854,10cyclictest20238-21sh21:45:391
10388998514,52cyclictest121850irq/46-eth020:51:011
10388998514,51cyclictest3124-21diskmemload21:28:551
10388998513,54cyclictest31457-21df_inode20:25:471
1038899844,51cyclictest0-21swapper/122:07:431
1038899843,13cyclictest0-21swapper/121:21:471
1038899834,71cyclictest0-21swapper/120:49:421
1038899834,11cyclictest9468-21perl20:40:481
1038899834,11cyclictest0-21swapper/118:15:561
1038899833,8cyclictest1866-21iostat19:40:541
1038899833,11cyclictest0-21swapper/119:50:511
1038899833,10cyclictest121850irq/46-eth021:30:491
1038899833,10cyclictest121850irq/46-eth021:30:491
1038899824,61cyclictest0-21swapper/123:06:291
1038899824,60cyclictest2501-21metacity22:46:231
1038899823,7cyclictest32136-21aten_r1power_en18:30:471
1038899815,68cyclictest0-21swapper/118:41:051
1038899814,59cyclictest0-21swapper/118:56:081
1038899814,12cyclictest0-21swapper/119:10:571
10388998120,43cyclictest0-21swapper/119:35:441
10388998114,47cyclictest15413-21telnet17:55:461
10388998110,51cyclictest1287-21snmpd18:00:571
1038899804,57cyclictest0-21swapper/119:26:141
1038899795,57cyclictest0-21swapper/118:46:061
1038899795,55cyclictest0-21swapper/119:06:101
1038899794,8cyclictest1419-21runrttasks19:31:091
1038899794,57cyclictest0-21swapper/119:16:121
1038899794,56cyclictest0-21swapper/118:25:461
1038899774,65cyclictest0-21swapper/118:05:591
1038899764,56cyclictest0-21swapper/117:50:501
1038899764,56cyclictest0-21swapper/117:50:501
89912750,4sleep337-21ksoftirqd/323:05:213
1038899754,63cyclictest0-21swapper/119:20:451
1038899754,63cyclictest0-21swapper/119:20:451
1038899753,8cyclictest3096-21which18:35:551
1038899753,8cyclictest3096-21which18:35:551
10388997522,45cyclictest14992-21gltestperf19:00:541
1039099743,32cyclictest0-21swapper/320:50:483
1038899706,58cyclictest1419-21runrttasks17:45:371
104252663,55sleep20-21swapper/221:30:442
104252663,55sleep20-21swapper/221:30:442
248599650,4rtkit-daemon2484-21rtkit-daemon20:17:302
1038799654,52cyclictest0-21swapper/021:45:400
44342634,12sleep00-21swapper/019:45:560
18762633,52sleep00-21swapper/019:40:570
1038999625,22cyclictest0-21swapper/222:15:512
1038999625,22cyclictest0-21swapper/222:15:512
1038799624,32cyclictest0-21swapper/022:44:570
248599610,5rtkit-daemon2484-21rtkit-daemon18:11:422
248599610,4rtkit-daemon2484-21rtkit-daemon17:53:432
248599610,4rtkit-daemon2484-21rtkit-daemon17:53:432
66022604,11sleep00-21swapper/022:11:290
248599600,4rtkit-daemon2484-21rtkit-daemon22:14:252
248599600,4rtkit-daemon2484-21rtkit-daemon22:02:032
248599600,4rtkit-daemon2484-21rtkit-daemon21:21:422
21072600,4sleep32263-21hostname18:35:463
21072600,4sleep32263-21hostname18:35:463
10390996023,10cyclictest4624-21aten_r1power_cu22:10:373
1038999604,38cyclictest0-21swapper/219:15:542
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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