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2026-03-06 - 19:20

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 Fri Mar 06, 2026 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1284699593,44cyclictest2997-21ssh09:30:130
1286499482,27cyclictest17452-21ssh09:20:132
1286499462,37cyclictest15152-21ssh09:55:122
1285699463,36cyclictest29800-21ssh09:45:121
1284699462,33cyclictest3093-21ssh11:55:120
1287799453,12cyclictest28366irq/58-eth010:25:133
1285699451,31cyclictest7398-21ssh10:45:111
12877994425,14cyclictest28366irq/58-eth011:50:133
1286499442,25cyclictest19707-21ssh11:10:132
1287799433,25cyclictest28366irq/58-eth009:15:143
1287799433,25cyclictest28366irq/58-eth009:15:133
1287799431,12cyclictest28366irq/58-eth010:10:103
1284699438,23cyclictest12-21ksoftirqd/007:35:140
1284699431,33cyclictest31987-21ssh09:10:140
1287799416,22cyclictest28366irq/58-eth012:15:133
1286499398,22cyclictest12837-21cyclictest10:15:112
12864993818,5cyclictest0-21swapper/212:35:132
12864993818,5cyclictest0-21swapper/212:35:122
1285699381,6cyclictest131rcu_preempt11:50:121
1284699382,20cyclictest28723-21ssh11:15:150
1285699372,26cyclictest23170-21ssh11:30:121
1287799363,18cyclictest28366irq/58-eth009:20:123
12864993619,8cyclictest0-21swapper/209:50:112
12846993619,7cyclictest12-21ksoftirqd/009:50:130
1287799357,16cyclictest28366irq/58-eth011:25:113
1284699351,24cyclictest8741-21ssh11:40:110
12877993415,11cyclictest28366irq/58-eth009:05:123
1286499332,17cyclictest21997-21ssh10:35:152
1284699332,25cyclictest29807-21sh09:45:140
12877993210,5cyclictest0-21swapper/310:17:423
1286499323,19cyclictest22346irq/40-dwc2_hso08:00:132
1286499323,18cyclictest27-21ksoftirqd/208:20:142
1287799318,13cyclictest28366irq/58-eth009:55:103
1286499313,21cyclictest22346irq/40-dwc2_hso07:10:132
1286499311,16cyclictest0-21swapper/210:55:122
1285699316,20cyclictest17758-21ssh11:45:131
1285699312,6cyclictest31973-21apt-get09:10:131
12846993110,15cyclictest12-21ksoftirqd/007:40:120
1287799302,17cyclictest28366irq/58-eth009:10:143
12877993016,9cyclictest28366irq/58-eth010:40:123
1286499303,21cyclictest0-21swapper/210:08:402
12856993023,5cyclictest8488-21diskmemload09:15:141
12856993023,5cyclictest8488-21diskmemload09:15:131
1284699302,22cyclictest26938-21sh10:19:420
1284699302,19cyclictest24105-21ssh10:00:130
1284699302,19cyclictest24105-21ssh10:00:130
1284699302,16cyclictest660-21ssh10:05:140
1287799295,12cyclictest28466irq/59-eth010:00:123
1287799295,12cyclictest28466irq/59-eth010:00:113
1286499298,14cyclictest27-21ksoftirqd/211:05:142
1286499293,17cyclictest22346irq/40-dwc2_hso08:50:112
1286499292,20cyclictest0-21swapper/209:10:132
12864992913,13cyclictest2208-21ps10:40:272
1286499291,22cyclictest27-21ksoftirqd/211:00:402
1286499291,16cyclictest15648-21ssh12:20:132
1285699292,23cyclictest15143-21ssh09:55:111
1285699292,19cyclictest5240-21ssh11:20:131
1284699296,13cyclictest13008-21ssh10:30:120
1284699291,23cyclictest23062-21ssh09:59:160
1287799282,16cyclictest28366irq/58-eth012:10:113
1287799282,16cyclictest28366irq/58-eth011:55:153
12877992811,11cyclictest28366irq/58-eth010:55:133
1286499287,10cyclictest27-21ksoftirqd/212:11:372
1286499283,19cyclictest0-21swapper/210:54:412
1286499283,17cyclictest22346irq/40-dwc2_hso08:45:142
1286499282,21cyclictest21077-21ssh12:05:122
1286499282,20cyclictest0-21swapper/209:00:142
1286499282,20cyclictest0-21swapper/207:30:152
1285699286,8cyclictest131rcu_preempt08:15:121
1284699285,18cyclictest12-21ksoftirqd/010:50:140
1284699284,16cyclictest12100-21ssh12:00:140
1287799273,16cyclictest0-21swapper/311:24:223
1287799273,16cyclictest0-21swapper/310:54:183
1287799272,11cyclictest0-21swapper/310:09:153
1287799271,17cyclictest0-21swapper/311:30:123
1286499274,13cyclictest22346irq/40-dwc2_hso08:35:142
1286499273,11cyclictest27-21ksoftirqd/212:29:012
12864992720,4cyclictest7807-21ssh10:45:182
1285699274,13cyclictest1278-21ssh12:30:151
1284699278,16cyclictest14326-1kworker/u9:109:20:130
1284699272,19cyclictest13553-21sh11:24:420
1287799264,14cyclictest28366irq/58-eth012:20:133
1287799263,16cyclictest0-21swapper/311:05:133
1286499269,3cyclictest131rcu_preempt09:37:262
1286499269,11cyclictest27-21ksoftirqd/211:56:332
1286499267,9cyclictest27-21ksoftirqd/208:10:242
1286499264,13cyclictest27-21ksoftirqd/209:15:032
1286499264,13cyclictest27-21ksoftirqd/209:15:022
1286499263,17cyclictest0-21swapper/210:00:422
1286499263,17cyclictest0-21swapper/210:00:412
1286499263,16cyclictest22346irq/40-dwc2_hso08:30:142
1286499262,9cyclictest3059-21ssh10:24:172
1286499262,21cyclictest0-21swapper/208:55:132
12864992611,12cyclictest0-21swapper/212:30:112
1284699266,14cyclictest12-21ksoftirqd/008:45:150
1284699261,22cyclictest32112-21ssh11:35:100
1287799253,14cyclictest28366irq/58-eth010:20:123
12877992514,8cyclictest28366irq/58-eth011:40:123
1286499252,10cyclictest28700-21diskmemload11:15:132
12864992513,9cyclictest10609-21ssh09:33:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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