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2026-07-23 - 23:17

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 here to display the system's profile data or here to proceed to next system.
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 Thu Jul 23, 2026 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
72999623,43cyclictest5502-21ssh11:25:131
72999604,51cyclictest23371-21ssh09:30:141
74199562,41cyclictest6712-21ssh10:50:132
72999531,43cyclictest26009-21ssh12:30:111
72199512,32cyclictest30054-21ssh10:45:130
72199511,43cyclictest7884-21apt-get12:20:120
74199492,21cyclictest15801-21ssh10:55:132
74199492,21cyclictest15801-21ssh10:55:132
72199491,43cyclictest0-21swapper/009:30:150
72999482,35cyclictest9388-21ssh11:45:131
72999481,38cyclictest26192-21ssh10:25:141
72999477,5cyclictest131rcu_preempt12:35:101
72199471,42cyclictest0-21swapper/011:15:130
72999462,36cyclictest24926-21ssh11:00:131
72199463,28cyclictest14575-21ssh11:30:130
72199462,39cyclictest0-21swapper/008:55:150
72199462,38cyclictest32211-21apt-get08:50:130
72199461,41cyclictest6886-21apt-get07:50:120
72199461,37cyclictest0-21swapper/010:20:120
74999453,26cyclictest35966irq/58-eth011:35:133
74999442,24cyclictest35966irq/58-eth010:50:143
72999442,35cyclictest4070-21ssh09:55:111
729994423,10cyclictest21-21ksoftirqd/110:30:131
729994419,19cyclictest21-21ksoftirqd/110:05:121
72999441,31cyclictest27450-21ssh11:55:131
72199443,31cyclictest26201-21ssh10:25:130
72199442,38cyclictest15327-21apt-get07:25:130
729994235,4cyclictest211ksoftirqd/110:55:121
729994235,4cyclictest211ksoftirqd/110:55:111
72199421,35cyclictest32456-21apt-get09:35:120
72199420,27cyclictest3307-21cat12:15:300
74999414,23cyclictest35966irq/58-eth010:00:123
749994124,12cyclictest0-21swapper/310:05:103
74199412,3cyclictest0-21swapper/209:35:122
74199412,24cyclictest13132-21ssh12:05:152
729994119,15cyclictest21-21ksoftirqd/111:05:131
72999411,10cyclictest131rcu_preempt09:35:121
72199412,32cyclictest8010-21ssh10:15:130
72199411,34cyclictest8189-21apt-get08:25:140
72199411,25cyclictest14411-21ssh11:45:410
72199410,29cyclictest22726-21ssh10:57:560
72199410,29cyclictest22726-21ssh10:57:550
72199401,34cyclictest2105-21apt-get07:45:130
72199401,34cyclictest0-21swapper/010:35:120
72199401,25cyclictest15368-21awk07:55:280
74999392,25cyclictest35966irq/58-eth012:35:123
74199392,24cyclictest28830-21ssh11:20:122
72199391,35cyclictest27356-21ssh09:50:120
72199391,2cyclictest0-21swapper/008:40:110
72199381,30cyclictest28827-21apt-get11:20:130
72199380,3cyclictest29703-21apt-get07:40:140
72199380,24cyclictest26097-21ssh09:49:000
74999372,18cyclictest35966irq/58-eth010:25:133
72199373,31cyclictest13117-21ssh12:05:140
72199371,31cyclictest22130-21apt-get10:05:100
72199371,30cyclictest0-21swapper/012:00:130
72199370,30cyclictest2788-21ssh10:30:130
72999364,22cyclictest19334-21ssh09:10:131
72199361,31cyclictest31859-21cut10:10:180
72199361,31cyclictest31859-21cut10:10:180
72199361,31cyclictest27400-21/usr/sbin/munin11:55:220
72199361,31cyclictest17799-21grep12:25:180
72199361,31cyclictest0-21swapper/009:20:130
72199361,30cyclictest3414-21apt-get08:20:130
721993612,21cyclictest18420-21apt11:50:120
72199360,4cyclictest23634-21apt-get11:35:120
72199360,30cyclictest20967-21apt-get10:40:130
72199360,24cyclictest1153-21ssh12:33:390
74999354,19cyclictest35966irq/58-eth011:30:123
72999354,6cyclictest131rcu_preempt09:50:131
72199352,30cyclictest0-21swapper/011:25:120
72199351,30cyclictest19343-21ssh09:10:140
72199351,30cyclictest10587-21/usr/sbin/munin11:10:240
72199350,4cyclictest2678-21apt-get12:35:120
74999346,25cyclictest35966irq/58-eth010:45:133
74199343,8cyclictest0-21swapper/212:28:262
729993423,7cyclictest211ksoftirqd/110:00:131
72199342,29cyclictest0-21swapper/009:15:120
72199341,29cyclictest24908-21apt-get11:00:130
72199341,29cyclictest13154-21apt-get10:00:140
72199341,29cyclictest10414-21cut09:40:190
72199341,24cyclictest12583-21ssh10:51:450
72199341,22cyclictest0-21swapper/009:25:190
74999336,17cyclictest35966irq/58-eth010:35:123
74999332,17cyclictest35966irq/58-eth010:10:133
74999332,17cyclictest35966irq/58-eth010:10:123
72199331,2cyclictest0-21swapper/007:30:140
72199331,2cyclictest0-21swapper/007:20:130
72199331,29cyclictest30733-21users08:10:310
72199331,28cyclictest28848-21tr08:45:190
72199331,28cyclictest28848-21tr08:45:190
72199331,28cyclictest23238-21kthreadcore12:10:210
72199331,28cyclictest19070-21latency_hist09:10:010
74199322,23cyclictest18332-21kworker/u8:012:30:272
72199321,28cyclictest3291-21cut11:40:230
72199321,28cyclictest3254-21kthreadcore07:10:210
72199321,27cyclictest2603-21kthreadcore11:05:200
72199321,26cyclictest0-21swapper/007:15:130
72199321,24cyclictest17799-21apt-get08:35:140
72199320,28cyclictest4844-21kthreadcore09:55:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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