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2026-06-13 - 17:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 rack7slot4s.osadl.org (updated Sat Jun 13, 2026 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1784299592,5cyclictest131rcu_preempt11:20:111
17858995534,15cyclictest35966irq/58-eth010:20:153
1784299491,37cyclictest25891-21ssh09:40:121
1783099464,32cyclictest7760-21ssh09:30:130
1785899451,39cyclictest0-21swapper/310:15:123
1784299451,37cyclictest28184-21ssh10:35:131
1783099452,36cyclictest4804-21ssh12:10:120
1783099452,36cyclictest4804-21ssh12:10:120
17830994422,9cyclictest131rcu_preempt07:35:130
1785899431,39cyclictest0-21swapper/310:50:133
1783099433,36cyclictest4890-21ssh10:40:130
1783099433,33cyclictest3534-21diskmemload10:45:120
1785099414,13cyclictest0-21swapper/210:05:152
1784299411,22cyclictest6359-21ssh10:05:141
1783099417,10cyclictest131rcu_preempt11:40:150
17858994017,14cyclictest35966irq/58-eth012:25:123
1783099405,26cyclictest5952-21sh10:20:320
1783099403,30cyclictest23021-21ssh10:50:130
17858993925,7cyclictest35966irq/58-eth009:30:133
1785899382,26cyclictest35966irq/58-eth011:45:133
1785899381,2cyclictest0-21swapper/311:55:123
1785899381,2cyclictest0-21swapper/308:25:123
1785899381,27cyclictest35966irq/58-eth010:55:123
1785099382,20cyclictest0-21swapper/210:55:552
1784299381,30cyclictest13934-21ssh10:45:111
1783099382,24cyclictest2497-21ssh09:45:130
1785899374,21cyclictest35966irq/58-eth009:10:133
1785899363,23cyclictest35966irq/58-eth007:20:133
1783099364,23cyclictest22924-21ssh12:20:120
1785899354,18cyclictest35966irq/58-eth010:30:123
1784299351,26cyclictest10118-21ssh10:25:141
1785899341,28cyclictest0-21swapper/309:15:123
17830993421,8cyclictest12-21ksoftirqd/010:10:120
1785899332,27cyclictest0-21swapper/307:25:123
1784299332,11cyclictest31218-21ssh10:54:331
1785899321,27cyclictest0-21swapper/311:20:123
1785899320,2cyclictest0-21swapper/312:05:123
1783099328,14cyclictest12-21ksoftirqd/011:10:140
1785899311,1cyclictest0-21swapper/309:40:123
17850993117,7cyclictest27-21ksoftirqd/208:00:152
1784299311,18cyclictest31141-21ssh09:25:141
1784299311,12cyclictest20405-21ssh10:10:451
1783099312,23cyclictest17462-21ssh12:35:130
1783099312,23cyclictest15073-21ssh11:39:320
1783099312,21cyclictest21310-21ssh11:25:140
1785899303,16cyclictest35966irq/58-eth012:30:143
1785899301,2cyclictest0-21swapper/312:11:503
1785899301,2cyclictest0-21swapper/312:11:493
1785899301,25cyclictest0-21swapper/308:40:163
1785899301,24cyclictest0-21swapper/307:50:143
1785899301,24cyclictest0-21swapper/307:50:133
1785899301,23cyclictest0-21swapper/309:55:123
1785099302,23cyclictest10639-21ssh10:41:312
1785099302,22cyclictest30377-21ssh10:53:322
1783099302,22cyclictest32236-21ssh11:48:320
1783099302,20cyclictest30167-21ssh10:16:340
1783099302,18cyclictest31856-21ssh12:25:120
1785899292,23cyclictest0-21swapper/307:55:123
1785899292,22cyclictest0-21swapper/311:40:143
1785899291,2cyclictest0-21swapper/312:35:123
1785899291,24cyclictest0-21swapper/311:30:143
1785899291,23cyclictest0-21swapper/307:35:133
1785899291,22cyclictest0-21swapper/310:35:143
1785899291,21cyclictest0-21swapper/308:35:133
1785899291,20cyclictest35966irq/58-eth012:20:133
1785899291,1cyclictest0-21swapper/311:50:113
1785099295,15cyclictest27346irq/40-dwc2_hso10:15:132
17850992915,11cyclictest0-21swapper/209:30:122
1783099292,22cyclictest10648-21sh11:18:310
1783099291,21cyclictest13942-21ssh12:15:140
1785899281,2cyclictest0-21swapper/310:25:133
1785899281,2cyclictest0-21swapper/309:20:133
1785899281,23cyclictest0-21swapper/311:00:123
1785899281,23cyclictest0-21swapper/307:15:133
1785899281,15cyclictest35966irq/58-eth008:20:153
1785099283,20cyclictest0-21swapper/210:36:342
1785099283,18cyclictest27346irq/40-dwc2_hso12:00:132
1784299283,13cyclictest21-21ksoftirqd/108:55:131
17842992813,8cyclictest12907-21ssh09:15:121
1783099289,10cyclictest131rcu_preempt07:15:130
1783099284,7cyclictest131rcu_preempt10:30:340
1783099281,19cyclictest10137-21ssh10:25:150
17830992810,12cyclictest630-21Async09:36:310
1785899276,18cyclictest35966irq/58-eth011:10:143
1785899273,17cyclictest0-21swapper/309:50:413
1785899271,2cyclictest0-21swapper/310:40:143
1785899271,22cyclictest0-21swapper/312:00:113
1785099274,15cyclictest27346irq/40-dwc2_hso07:55:122
1785099273,18cyclictest27346irq/40-dwc2_hso08:40:142
17850992717,7cyclictest930-21snmpd07:15:132
1784299272,19cyclictest24898-21ssh11:45:151
17842992715,4cyclictest0-21swapper/109:20:131
1784299271,20cyclictest8423-21ssh12:30:131
1784299270,14cyclictest25942-21cat11:25:311
1783099277,9cyclictest131rcu_preempt09:05:140
1783099272,19cyclictest3534-21diskmemload11:31:010
1783099272,19cyclictest13897-21ssh11:00:550
17830992715,6cyclictest0-21swapper/012:30:130
1785899261,3cyclictest0-21swapper/311:27:553
1785899261,2cyclictest0-21swapper/311:05:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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