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2026-05-01 - 14:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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.

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 rack7slot3s.osadl.org (updated Fri May 01, 2026 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1778124980,5sleep30-21swapper/316:26:173
2784621050,2sleep10-21swapper/119:06:141
18766999214,45cyclictest7950irq/56-dwc_otg_21:26:061
18763999122,5cyclictest26392-21fschecks_count16:51:090
179372910,3sleep217898-21ssh21:31:092
18763998710,29cyclictest2944-21unixbench_multi21:51:190
177872840,4sleep09-21ksoftirqd/017:56:090
239052830,2sleep00-21swapper/020:20:410
262812790,12sleep27950irq/56-dwc_otg_19:05:072
316032730,2sleep20-21swapper/221:08:022
86252720,2sleep10-21swapper/121:20:131
86252720,2sleep10-21swapper/121:20:131
235892720,6sleep11876699cyclictest18:11:151
15802720,1sleep30-21swapper/319:52:423
1876699692,55cyclictest11410-21ssh18:46:171
103632680,2sleep00-21swapper/019:24:530
1876399671,49cyclictest0-21swapper/021:16:020
1876399671,49cyclictest0-21swapper/021:16:020
1876399663,43cyclictest0-21swapper/018:56:200
1876699655,20cyclictest16069-21ssh20:11:031
55202640,2sleep10-21swapper/119:18:341
1876699646,47cyclictest16618-21grep19:31:191
1876399643,44cyclictest0-21swapper/021:40:520
1876999632,28cyclictest7750irq/56-dwc_otg17:26:033
1876699638,5cyclictest7850irq/56-dwc_otg_21:51:191
1876699634,13cyclictest21414-21grep18:06:101
1876399632,45cyclictest30574-21grep21:06:210
1876399631,26cyclictest32562-21dpkg20:30:530
1876699629,5cyclictest7850irq/56-dwc_otg_21:03:281
1876699623,5cyclictest0-21swapper/117:01:161
1876699621,6cyclictest15248-21sort19:30:531
1876699621,6cyclictest15248-21sort19:30:531
1876399622,43cyclictest31631-21cron19:50:520
18763996222,10cyclictest0-21swapper/019:36:050
232432610,1sleep30-21swapper/321:36:413
1876699613,4cyclictest7750irq/56-dwc_otg20:43:261
1876699611,6cyclictest25240-21timerwakeupswit16:46:191
18766996110,41cyclictest7850irq/56-dwc_otg_18:05:481
1876399611,42cyclictest19940-21grep16:31:200
112642610,3sleep30-21swapper/319:26:053
112642610,3sleep30-21swapper/319:26:053
1876699605,40cyclictest0-21swapper/120:20:521
1876699602,7cyclictest19047-21grep16:31:091
1876699601,5cyclictest13784-21timerandwakeup20:46:181
18766996013,38cyclictest7750irq/56-dwc_otg19:01:161
1876399602,49cyclictest0-21swapper/017:36:180
1876699596,40cyclictest7950irq/56-dwc_otg_19:11:191
1876699593,5cyclictest30260-21processes21:06:181
1876699593,11cyclictest7950irq/56-dwc_otg_20:21:071
1876399598,31cyclictest0-21swapper/019:26:030
1876399598,31cyclictest0-21swapper/019:26:030
1876399592,43cyclictest16782-21sed17:51:180
18763995915,27cyclictest19530-21fschecks_count18:01:090
18763995832,14cyclictest9632-21ssh21:21:080
1876399582,33cyclictest0-21swapper/021:31:090
1876399581,45cyclictest29917-21latency_hist18:30:510
1876399581,42cyclictest8659-21aten_rbpower_en20:41:060
91012570,2sleep30-21swapper/319:22:353
1876699574,13cyclictest7850irq/56-dwc_otg_16:51:091
1876699571,6cyclictest11953-21ssh20:06:051
1876399571,43cyclictest883-21mktemp17:10:530
1876399571,43cyclictest883-21mktemp17:10:530
1876399571,41cyclictest1551-21unixbench_singl20:31:190
1876699567,4cyclictest0-21swapper/121:36:571
18766995616,37cyclictest2807-21latency_hist17:15:521
1876699561,4cyclictest0-21swapper/118:31:331
1876699561,13cyclictest0-21swapper/117:06:291
1876699561,13cyclictest0-21swapper/117:06:291
1876399561,44cyclictest0-21swapper/018:31:160
100602560,3sleep11876699cyclictest21:21:131
20462550,2sleep00-21swapper/018:36:020
1876699552,5cyclictest31977-21ssh21:47:291
1876699552,3cyclictest0-21swapper/116:43:251
1876699551,5cyclictest23062-21runrttasks20:57:431
1876699551,5cyclictest23062-21runrttasks20:57:431
1876699551,12cyclictest7750irq/56-dwc_otg19:00:001
228902540,5sleep01876399cyclictest20:57:250
228902540,5sleep01876399cyclictest20:57:250
1876699549,5cyclictest7850irq/56-dwc_otg_21:15:131
1876699545,7cyclictest7950irq/56-dwc_otg_16:56:101
1876699545,4cyclictest7950irq/56-dwc_otg_20:29:061
1876699542,12cyclictest7850irq/56-dwc_otg_19:51:231
18766995420,31cyclictest14585-21/usr/sbin/munin18:51:091
1876699541,3cyclictest0-21swapper/120:02:201
1876699541,13cyclictest25541-21ssh19:42:201
18763995424,5cyclictest7242-21grep21:56:190
1876399542,40cyclictest0-21swapper/021:26:080
18763995415,27cyclictest6391-21wget18:41:040
1876699532,3cyclictest0-21swapper/120:36:161
1876699531,8cyclictest27589-21unixbench_multi18:21:201
1876699531,8cyclictest27589-21unixbench_multi18:21:201
1876699531,3cyclictest7750irq/56-dwc_otg21:59:531
18766995310,40cyclictest7950irq/56-dwc_otg_18:45:521
18763995336,4cyclictest7850irq/56-dwc_otg_18:51:050
18763995331,5cyclictest7850irq/56-dwc_otg_19:41:160
18763995328,5cyclictest7750irq/56-dwc_otg17:00:520
1876399532,31cyclictest0-21swapper/017:35:530
1876399531,49cyclictest27241-21grep18:21:170
1876399531,49cyclictest27241-21grep18:21:170
1876399531,42cyclictest0-21swapper/018:46:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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