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2026-07-11 - 11:59

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 Jul 11, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18445996748,11cyclictest35966irq/58-eth021:20:113
1843199624,37cyclictest10166-21ssh23:35:102
1843199601,35cyclictest0-21swapper/220:25:132
1843199542,28cyclictest28298-21ssh23:45:122
1844599535,27cyclictest35966irq/58-eth022:55:133
18445995032,9cyclictest35966irq/58-eth021:55:103
1842299503,37cyclictest27325-21ssh00:20:131
1844599481,44cyclictest0-21swapper/322:10:123
18408994813,8cyclictest131rcu_preempt19:10:110
1843199461,33cyclictest17027-21ssh22:10:122
1842299462,33cyclictest8868-21ssh21:30:151
1842299461,33cyclictest16229-21ssh22:45:111
1844599455,32cyclictest35966irq/58-eth023:10:123
1842299453,8cyclictest131rcu_preempt20:00:131
18408994511,20cyclictest12-21ksoftirqd/020:20:110
18408994317,9cyclictest131rcu_preempt20:35:120
18408994317,9cyclictest131rcu_preempt20:35:120
1840899430,32cyclictest22205-21ssh00:35:120
1840899424,33cyclictest26996-21sh21:40:120
18408994125,12cyclictest0-21swapper/023:30:130
1840899411,6cyclictest131rcu_preempt19:25:130
1844599402,22cyclictest35966irq/58-eth023:55:123
18445993922,12cyclictest35966irq/58-eth021:15:133
1842299391,30cyclictest32094-21ssh21:25:131
1840899395,8cyclictest131rcu_preempt19:50:120
1842299381,28cyclictest13711-21ssh21:15:151
1840899384,9cyclictest131rcu_preempt19:15:110
1842299371,23cyclictest1083-21ssh23:30:121
1840899373,30cyclictest29428-21ssh23:10:120
18408993731,3cyclictest0-21swapper/022:50:130
1840899372,6cyclictest131rcu_preempt20:25:120
1840899372,29cyclictest21238-21ssh22:30:130
1840899361,27cyclictest23303-21ssh00:00:120
18408993610,10cyclictest131rcu_preempt19:20:130
1844599351,20cyclictest35966irq/58-eth000:25:133
1840899357,21cyclictest12-21ksoftirqd/000:30:130
1842299340,27cyclictest0-21swapper/122:30:111
1840899349,22cyclictest3681-21ssh21:45:110
1844599331,5cyclictest0-21swapper/320:05:133
1843199333,8cyclictest4058-21diskmemload22:55:132
18431993326,4cyclictest27-21ksoftirqd/222:20:132
1843199332,23cyclictest27346irq/40-dwc2_hso19:50:132
1840899333,19cyclictest151rcuc/022:40:130
1840899333,19cyclictest151rcuc/022:40:120
18408993312,13cyclictest12-21ksoftirqd/022:55:120
1844599322,4cyclictest0-21swapper/300:20:143
18445993219,9cyclictest35966irq/58-eth022:35:133
1844599321,2cyclictest0-21swapper/323:05:123
1844599321,19cyclictest35966irq/58-eth000:10:113
1843199321,21cyclictest21994-21ssh21:55:132
1842299322,15cyclictest18170-21ssh00:15:131
1840899322,24cyclictest24365-21ssh23:25:120
18445993118,9cyclictest35966irq/58-eth022:20:133
18445993116,10cyclictest0-21swapper/319:55:143
1844599311,4cyclictest35966irq/58-eth000:35:123
1844599302,5cyclictest0-21swapper/319:50:113
1844599301,4cyclictest0-21swapper/322:30:133
1843199302,21cyclictest0-21swapper/220:10:182
1840899304,21cyclictest17940-21ssh21:35:140
18408993010,18cyclictest12-21ksoftirqd/023:40:130
1844599293,19cyclictest35966irq/58-eth021:35:143
1844599292,2cyclictest0-21swapper/323:00:133
1844599292,15cyclictest35966irq/58-eth022:50:133
1844599291,5cyclictest0-21swapper/320:35:123
1844599291,5cyclictest0-21swapper/320:35:123
1844599291,17cyclictest35966irq/58-eth021:30:143
1843199291,15cyclictest12104-21ssh22:25:112
1840899291,20cyclictest844-21munin-node19:30:140
1844599282,4cyclictest0-21swapper/320:25:123
1844599282,4cyclictest0-21swapper/319:20:133
1844599282,3cyclictest0-21swapper/321:05:133
1843199282,20cyclictest0-21swapper/220:20:132
1843199281,18cyclictest27335-21ssh00:20:132
1842299283,16cyclictest22890-21ssh21:20:121
1840899284,17cyclictest8417-1kworker/u9:000:10:110
1844599277,12cyclictest35966irq/58-eth000:15:143
1844599271,4cyclictest0-21swapper/300:00:123
1843199271,20cyclictest17944-21ssh21:35:142
1842299273,9cyclictest131rcu_preempt23:00:131
1842299271,19cyclictest19320-21ssh23:40:141
1842299271,17cyclictest30329-21ssh22:35:121
1840899274,18cyclictest4058-21diskmemload00:20:140
18408992718,6cyclictest17032-21ssh22:10:130
18408992717,8cyclictest151rcuc/023:00:120
18408992716,8cyclictest28314-21sh23:45:130
1844599263,2cyclictest0-21swapper/323:37:223
1844599261,3cyclictest0-21swapper/323:54:463
1844599261,3cyclictest0-21swapper/323:32:243
1844599261,3cyclictest0-21swapper/323:29:193
1844599261,3cyclictest0-21swapper/323:23:003
1844599261,3cyclictest0-21swapper/322:40:343
1844599261,3cyclictest0-21swapper/322:40:343
1844599261,3cyclictest0-21swapper/321:28:173
1844599261,3cyclictest0-21swapper/300:34:263
1844599261,3cyclictest0-21swapper/300:08:143
1844599261,2cyclictest0-21swapper/322:20:023
1844599261,2cyclictest0-21swapper/321:12:023
1844599261,2cyclictest0-21swapper/320:45:133
1844599261,22cyclictest0-21swapper/321:45:103
1844599261,16cyclictest35966irq/58-eth019:10:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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