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2026-04-11 - 16:20

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 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 Sat Apr 11, 2026 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
132999695,48cyclictest2295-21ssh11:05:141
132999646,7cyclictest21-21ksoftirqd/108:55:121
133999582,34cyclictest22917-21ssh12:10:132
133999508,7cyclictest271ksoftirqd/211:15:122
1339994811,28cyclictest27-21ksoftirqd/208:45:122
132999460,36cyclictest21910-21ssh10:40:131
133999391,27cyclictest17847-21ssh12:25:142
1350993826,5cyclictest28366irq/58-eth009:20:133
1339993828,8cyclictest0-21swapper/210:05:112
133999380,27cyclictest13974-21ssh10:00:132
132999371,28cyclictest24204-21ssh11:35:111
132999361,26cyclictest20404-21ssh11:15:141
1339993511,17cyclictest0-21swapper/211:30:202
132999351,26cyclictest32073-21ssh10:10:131
132999347,5cyclictest131rcu_preempt07:35:121
132999341,26cyclictest8820-21ssh12:20:161
1315993418,11cyclictest28168-21apt-get11:55:130
1339993311,15cyclictest0-21swapper/210:44:402
132999330,19cyclictest12755-21ssh10:35:131
133999327,16cyclictest0-21swapper/211:10:342
1339993216,14cyclictest5866-21ssh10:30:222
1339993213,13cyclictest0-21swapper/209:55:142
1339993210,12cyclictest27-21ksoftirqd/211:50:302
132999326,4cyclictest131rcu_preempt08:50:141
1329993212,3cyclictest0-21swapper/108:20:141
133999313,21cyclictest0-21swapper/207:20:142
1339993113,5cyclictest27-21ksoftirqd/210:10:182
1339993110,15cyclictest0-21swapper/212:09:062
1339993110,15cyclictest0-21swapper/212:03:402
1339993110,15cyclictest0-21swapper/209:46:242
131599317,6cyclictest12-21ksoftirqd/010:00:120
1315993118,7cyclictest3026-21apt-get07:45:140
133999309,15cyclictest0-21swapper/211:58:582
133999309,15cyclictest0-21swapper/209:33:092
1339993013,11cyclictest0-21swapper/210:46:582
133999301,22cyclictest8791-21ssh10:15:142
132999308,13cyclictest21-21ksoftirqd/110:15:131
131599304,6cyclictest12-21ksoftirqd/012:35:190
131599303,22cyclictest4955-21sh09:55:140
133999298,15cyclictest0-21swapper/212:33:182
133999293,17cyclictest22346irq/40-dwc2_hso09:05:122
133999292,18cyclictest22346irq/40-dwc2_hso07:55:132
1339992912,11cyclictest0-21swapper/209:20:282
133999291,15cyclictest27-21ksoftirqd/211:05:212
1339992910,14cyclictest0-21swapper/210:58:582
1329992912,8cyclictest21-21ksoftirqd/111:30:021
1329992911,9cyclictest21-21ksoftirqd/111:50:011
131599291,8cyclictest13923-21awk11:45:290
133999289,15cyclictest27-21ksoftirqd/209:40:522
133999288,14cyclictest27-21ksoftirqd/209:25:262
133999286,16cyclictest27-21ksoftirqd/212:36:142
133999286,16cyclictest27-21ksoftirqd/211:01:532
133999282,19cyclictest0-21swapper/208:30:142
1339992819,5cyclictest261rcuc/207:50:142
133999280,19cyclictest22346irq/40-dwc2_hso08:20:142
132999288,5cyclictest21-21ksoftirqd/112:30:481
132999282,19cyclictest4921-21ssh12:16:031
132999282,19cyclictest4921-21ssh12:16:031
1329992813,7cyclictest21-21ksoftirqd/111:20:171
132999281,22cyclictest15219-21ssh11:30:151
1329992811,4cyclictest21-21ksoftirqd/110:35:001
1329992810,8cyclictest21-21ksoftirqd/108:35:271
131599287,5cyclictest12-21ksoftirqd/011:00:320
131599285,5cyclictest12-21ksoftirqd/011:25:300
131599284,9cyclictest12294-21basename10:35:010
131599284,4cyclictest12-21ksoftirqd/010:15:230
131599282,4cyclictest12-21ksoftirqd/009:25:260
1315992820,6cyclictest31996-21ssh12:15:130
1315992820,6cyclictest31996-21ssh12:15:120
1315992811,5cyclictest0-21swapper/009:22:190
133999275,13cyclictest27-21ksoftirqd/210:35:252
1339992712,8cyclictest0-21swapper/209:18:012
133999271,15cyclictest27-21ksoftirqd/210:55:022
132999279,8cyclictest21-21ksoftirqd/107:40:281
132999278,9cyclictest13964-21apt-get10:00:131
132999278,8cyclictest21-21ksoftirqd/108:30:301
1329992711,7cyclictest0-21swapper/112:13:231
1329992710,9cyclictest21-21ksoftirqd/108:15:011
1329992710,8cyclictest0-21swapper/109:00:151
131599278,3cyclictest131rcu_preempt12:03:580
131599276,8cyclictest12-21ksoftirqd/010:25:240
131599276,8cyclictest12-21ksoftirqd/010:25:230
131599275,5cyclictest12-21ksoftirqd/012:10:260
131599275,5cyclictest12-21ksoftirqd/009:40:240
131599274,5cyclictest12-21ksoftirqd/011:35:290
131599274,5cyclictest12-21ksoftirqd/010:40:250
131599274,5cyclictest12-21ksoftirqd/009:50:240
131599274,5cyclictest11456-21ssh12:20:230
131599274,4cyclictest12-21ksoftirqd/008:15:010
131599274,4cyclictest12-21ksoftirqd/007:55:010
131599273,6cyclictest12-21ksoftirqd/011:50:290
1315992721,3cyclictest0-21swapper/010:45:140
131599271,9cyclictest12-21ksoftirqd/012:06:110
131599271,7cyclictest9246-21cat08:25:010
131599271,7cyclictest12-21ksoftirqd/009:45:160
1315992710,11cyclictest22956-21apt-get10:05:140
131599270,9cyclictest5621-21ssh10:11:470
133999268,14cyclictest27-21ksoftirqd/211:40:122
133999267,4cyclictest27-21ksoftirqd/210:20:282
133999267,4cyclictest27-21ksoftirqd/208:05:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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