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2026-08-14 - 02:37

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 Aug 14, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
126132950,8sleep01112399cyclictest21:47:410
126132950,8sleep01112399cyclictest21:47:410
132432890,6sleep213248-21fschecks_time19:07:522
193362840,3sleep3361ktimersoftd/320:18:063
11127997641,12cyclictest0-21swapper/120:13:461
11123997528,8cyclictest448-21ssh20:38:530
11129997417,50cyclictest31955-21latency20:37:573
11127996822,27cyclictest5890-21unixbench_singl19:58:071
1112399683,58cyclictest0-21swapper/022:03:020
77882673,12sleep20-21swapper/223:17:462
11127996723,25cyclictest0-21swapper/120:09:061
40622660,6sleep21112899cyclictest22:22:502
1112999655,54cyclictest0-21swapper/322:20:223
1112999653,56cyclictest0-21swapper/321:38:533
1112999646,50cyclictest4693-21sort23:12:503
1112899644,52cyclictest0-21swapper/221:02:532
1112899644,51cyclictest0-21swapper/222:52:412
11127996440,8cyclictest19217-21cpuspeed_turbos21:57:411
11127996426,13cyclictest0-21swapper/122:41:351
1112399644,53cyclictest0-21swapper/023:02:320
1112399644,53cyclictest0-21swapper/023:02:320
1112899634,51cyclictest0-21swapper/223:02:452
1112899634,51cyclictest0-21swapper/223:02:452
1112899634,51cyclictest0-21swapper/221:49:092
1112899634,51cyclictest0-21swapper/221:49:092
1112899634,51cyclictest0-21swapper/221:32:482
1112899624,51cyclictest0-21swapper/223:00:022
1112899624,50cyclictest0-21swapper/223:13:002
1112899624,50cyclictest0-21swapper/221:52:502
1112899624,50cyclictest0-21swapper/219:57:332
1112899623,52cyclictest0-21swapper/220:22:492
1112899623,51cyclictest0-21swapper/222:42:462
1112899623,51cyclictest0-21swapper/222:38:002
1112899622,42cyclictest0-21swapper/220:21:102
11127996245,12cyclictest0-21swapper/118:02:491
11127996225,10cyclictest24278-21interrupts18:22:581
11127996225,10cyclictest24278-21interrupts18:22:581
269682613,51sleep10-21swapper/120:31:241
269682613,51sleep10-21swapper/120:31:241
219499610,5rtkit-daemon2193-21rtkit-daemon19:05:441
219499610,5rtkit-daemon2193-21rtkit-daemon19:05:441
219499610,4rtkit-daemon2193-21rtkit-daemon18:45:221
1112899614,50cyclictest0-21swapper/220:39:572
1112899614,49cyclictest0-21swapper/221:17:492
1112899614,48cyclictest0-21swapper/220:43:032
1112899613,50cyclictest0-21swapper/219:27:522
1112799619,28cyclictest12974-21fschecks_time21:47:451
1112799619,28cyclictest12974-21fschecks_time21:47:451
11127996145,11cyclictest0-21swapper/120:32:501
11127996132,13cyclictest0-21swapper/121:28:031
1112899603,8cyclictest26-21rcuc/222:07:482
1112899603,50cyclictest0-21swapper/218:42:352
1112899603,49cyclictest0-21swapper/222:02:462
1112899603,49cyclictest0-21swapper/221:07:432
1112899603,49cyclictest0-21swapper/221:07:432
1112899602,52cyclictest0-21swapper/220:15:102
11127996043,11cyclictest0-21swapper/121:33:031
11127996043,10cyclictest0-21swapper/120:37:551
11127996041,13cyclictest0-21swapper/118:32:471
215352592,51sleep30-21swapper/322:01:113
1112999595,22cyclictest0-21swapper/321:47:283
1112899594,49cyclictest0-21swapper/221:27:412
11128995934,8cyclictest24497-21ssh20:27:462
11128995934,8cyclictest24497-21ssh20:27:462
1112899593,49cyclictest0-21swapper/218:27:362
1112899593,49cyclictest0-21swapper/218:27:362
11127995945,8cyclictest3864-21diskmemload20:48:041
11127995936,9cyclictest0-21swapper/118:12:521
11127995933,10cyclictest31012-21unixbench-2d23:03:001
11127995933,10cyclictest31012-21unixbench-2d23:03:001
11127995925,13cyclictest0-21swapper/122:03:331
11127995925,11cyclictest0-21swapper/122:50:001
11129995823,23cyclictest0-21swapper/322:32:463
11128995834,8cyclictest19451-21ssh21:57:442
1112899583,48cyclictest0-21swapper/222:12:582
1112799585,12cyclictest18679-21irqstats20:17:561
11127995830,13cyclictest0-21swapper/121:17:451
11127995828,13cyclictest0-21swapper/121:06:261
11127995826,13cyclictest0-21swapper/122:09:551
11127995826,12cyclictest7525-21ssh22:27:531
11127995826,12cyclictest7525-21ssh22:27:531
11127995823,15cyclictest0-21swapper/121:10:591
11127995823,15cyclictest0-21swapper/121:10:591
1112399585,45cyclictest0-21swapper/022:54:440
90952573,48sleep00-21swapper/020:03:090
296232573,46sleep20-21swapper/221:23:012
219499570,4rtkit-daemon2193-21rtkit-daemon20:03:411
11129995722,18cyclictest24213-21ssh22:53:003
1112899574,46cyclictest0-21swapper/222:32:262
1112899574,46cyclictest0-21swapper/222:32:262
1112899573,48cyclictest0-21swapper/219:03:042
1112899573,48cyclictest0-21swapper/219:03:042
1112899573,11cyclictest0-21swapper/222:47:412
11127995740,12cyclictest0-21swapper/122:36:431
11127995731,12cyclictest0-21swapper/118:39:031
11127995730,12cyclictest0-21swapper/121:22:401
11127995728,12cyclictest0-21swapper/121:42:291
11127995726,15cyclictest0-21swapper/121:42:441
11127995723,14cyclictest0-21swapper/120:24:301
1112399579,30cyclictest0-21swapper/021:57:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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