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2025-10-26 - 12:26

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 50 highest latencies:
System rack5slot3s.osadl.org (updated Sun Oct 26, 2025 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
202232243164,25sleep20-21swapper/219:07:512
202092205169,23sleep10-21swapper/119:07:411
201862203167,24sleep30-21swapper/319:07:233
200422201164,24sleep00-21swapper/019:05:320
225502660,2sleep10-21swapper/122:50:281
258132650,4sleep32049599cyclictest20:30:303
20490994224,3cyclictest15123-21kworker/2:100:40:002
2049099422,28cyclictest15123-21kworker/2:123:37:182
20490994213,9cyclictest15123-21kworker/2:121:46:122
20490994129,3cyclictest15123-21kworker/2:120:38:402
20490994129,3cyclictest15123-21kworker/2:100:20:282
20490994028,3cyclictest15123-21kworker/2:120:48:102
20490993929,2cyclictest15123-21kworker/2:122:26:582
20490993927,2cyclictest15123-21kworker/2:121:15:442
20490993910,9cyclictest15123-21kworker/2:100:07:022
2049099381,21cyclictest15123-21kworker/2:100:15:262
2047899381,12cyclictest30245-21kworker/0:000:25:230
2047899380,15cyclictest18228-21kworker/0:121:55:050
2047899380,15cyclictest16108-21kworker/0:222:37:250
20490993727,2cyclictest15123-21kworker/2:120:02:472
2049099371,23cyclictest15123-21kworker/2:100:28:282
20478993713,3cyclictest21568-21kworker/0:320:25:220
2047899371,22cyclictest2531-21kworker/0:021:12:320
2047899371,22cyclictest2531-21kworker/0:021:12:320
2047899371,11cyclictest23830-21kworker/0:020:37:080
20490993622,2cyclictest15123-21kworker/2:122:07:062
2047899361,16cyclictest15783-21kworker/0:021:30:250
2047899361,12cyclictest3585-21kworker/0:023:30:510
2047899351,12cyclictest6095-21kworker/0:319:50:240
2047899350,12cyclictest31856-21kworker/0:019:40:360
2047899350,11cyclictest29632-21kworker/0:119:29:140
2049099342,25cyclictest15123-21kworker/2:100:02:522
2049099342,14cyclictest15123-21kworker/2:122:23:282
20490993418,3cyclictest15123-21kworker/2:121:06:182
20490993415,7cyclictest15123-21kworker/2:122:12:262
20490993410,8cyclictest15123-21kworker/2:122:15:282
20490993410,8cyclictest15123-21kworker/2:122:15:282
2049099340,22cyclictest15123-21kworker/2:121:36:562
2047899341,12cyclictest5891-21kworker/0:123:35:390
2047899341,12cyclictest2531-21kworker/0:021:03:220
20478993410,11cyclictest2336-21idleruntime-cro00:35:020
2047899340,13cyclictest5363-21kworker/0:022:27:130
2047899340,13cyclictest27322-21kworker/0:023:09:130
20490993323,2cyclictest15123-21kworker/2:119:41:572
2049099332,23cyclictest15123-21kworker/2:119:35:252
20490993315,7cyclictest15123-21kworker/2:119:52:232
20490993315,10cyclictest15123-21kworker/2:119:11:582
20490993313,8cyclictest15123-21kworker/2:122:59:502
2049099331,24cyclictest15123-21kworker/2:119:27:452
2049099331,23cyclictest15123-21kworker/2:119:45:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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