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2026-05-19 - 14:38

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 Tue May 19, 2026 12:45:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20743995116,20cyclictest35966irq/58-eth011:15:143
2072199503,37cyclictest16078-21sh10:45:141
2074399413,24cyclictest35966irq/58-eth009:55:133
2072199411,6cyclictest131rcu_preempt07:10:121
2072199402,30cyclictest19626-21ssh09:35:121
2072199401,34cyclictest28651-21ssh11:10:121
2074399392,24cyclictest35966irq/58-eth012:25:113
2072199391,28cyclictest28670-21rm09:40:121
2074399374,22cyclictest35966irq/58-eth009:35:123
20743993725,6cyclictest35966irq/58-eth011:10:123
2071299371,33cyclictest21427-21ssh12:00:130
2074399363,25cyclictest0-21swapper/312:15:143
2071299361,31cyclictest16018-21ssh12:15:140
2074399352,16cyclictest35966irq/58-eth009:45:133
2072199350,24cyclictest23301-21ssh09:55:141
20743993416,12cyclictest0-21swapper/311:41:593
2073399347,22cyclictest18046-1kworker/u9:011:03:592
2071299334,25cyclictest21416-21ssh10:30:120
2071299322,28cyclictest17849-21ssh11:40:140
2074399317,17cyclictest0-21swapper/312:09:003
20733993122,7cyclictest6886-21sh09:10:132
2071299312,23cyclictest6903-21ssh09:10:140
20712993117,11cyclictest12-21ksoftirqd/010:35:150
2074399303,17cyclictest35966irq/58-eth007:10:133
2071299306,18cyclictest6485-21diskmemload09:45:140
2071299305,22cyclictest25051-21ssh12:20:120
20712993023,4cyclictest12-21ksoftirqd/011:10:130
2071299301,24cyclictest10634-21sh12:30:140
2074399295,20cyclictest35966irq/58-eth010:05:123
2074399295,20cyclictest35966irq/58-eth010:05:113
2074399293,17cyclictest35966irq/58-eth011:05:153
20743992916,8cyclictest35966irq/58-eth011:25:133
2074399291,14cyclictest35966irq/58-eth007:35:123
2073399292,17cyclictest32287-21ssh10:00:132
2073399292,11cyclictest30325-21ssh12:20:592
2071299297,20cyclictest12-21ksoftirqd/008:20:120
2074399281,6cyclictest0-21swapper/310:15:143
2074399281,6cyclictest0-21swapper/310:15:143
2071299282,23cyclictest14320-21ssh11:00:260
2071299282,18cyclictest1633-21ssh12:25:140
2074399273,13cyclictest0-21swapper/312:35:153
2074399271,5cyclictest0-21swapper/311:35:193
2073399273,19cyclictest0-21swapper/211:46:592
20733992719,6cyclictest15881-21ssh09:15:142
2072199272,19cyclictest28228-21ssh11:09:591
2072199272,18cyclictest1236866ssh11:55:161
20721992712,10cyclictest11177-21diskmemload11:54:081
2071299271,22cyclictest31699-21ssh11:45:320
2074399261,6cyclictest0-21swapper/310:45:163
2074399261,5cyclictest0-21swapper/312:20:203
2074399261,3cyclictest0-21swapper/312:30:283
2073399262,9cyclictest14747-21ssh10:43:592
2073399262,9cyclictest14747-21ssh10:43:592
20733992622,2cyclictest27-21ksoftirqd/211:34:042
2073399261,9cyclictest21896-21sed11:40:282
20733992611,8cyclictest27-21ksoftirqd/210:15:122
20733992611,8cyclictest27-21ksoftirqd/210:15:122
2071299264,2cyclictest131rcu_preempt11:15:140
2074399256,5cyclictest0-21swapper/309:15:343
2074399252,17cyclictest0-21swapper/311:48:003
2074399251,7cyclictest0-21swapper/309:50:233
2074399251,6cyclictest0-21swapper/309:25:293
2074399251,6cyclictest0-21swapper/308:15:013
2074399251,4cyclictest0-21swapper/309:40:303
2073399251,9cyclictest10490-21fschecks_time08:40:162
2073399251,9cyclictest10490-21fschecks_time08:40:162
20733992513,10cyclictest6764-21latency11:50:202
2073399251,21cyclictest30436-21ssh10:35:132
2073399251,10cyclictest3062966ssh11:10:212
2071299251,6cyclictest131rcu_preempt11:35:590
2074399249,13cyclictest0-21swapper/311:34:173
2074399245,5cyclictest35966irq/58-eth010:30:303
2074399244,3cyclictest0-21swapper/310:20:293
2074399241,9cyclictest0-21swapper/309:30:193
2074399241,6cyclictest0-21swapper/310:00:243
2074399241,6cyclictest0-21swapper/309:00:213
2074399241,5cyclictest0-21swapper/308:45:263
2073399249,4cyclictest32431-21ps09:40:272
2073399246,9cyclictest20056-21sed12:35:192
2073399245,4cyclictest5195-21apt-get11:15:132
2073399244,9cyclictest17946-21ssh10:10:102
2073399240,16cyclictest12286-21ls11:35:212
2072199242,18cyclictest14156-21ssh11:20:131
2072199241,16cyclictest10653-21ssh09:30:151
2071299245,9cyclictest0-21swapper/010:15:150
2071299245,9cyclictest0-21swapper/010:15:140
2071299242,18cyclictest6485-21diskmemload11:34:580
2074399232,14cyclictest35966irq/58-eth010:35:143
2074399231,9cyclictest0-21swapper/310:10:143
2074399231,7cyclictest0-21swapper/307:50:223
2074399231,6cyclictest0-21swapper/311:50:173
2074399231,6cyclictest0-21swapper/311:20:273
2074399231,6cyclictest0-21swapper/311:00:173
2074399231,6cyclictest0-21swapper/310:55:243
2074399231,6cyclictest0-21swapper/310:40:193
2074399231,6cyclictest0-21swapper/310:40:193
2074399231,6cyclictest0-21swapper/308:50:283
2074399231,6cyclictest0-21swapper/308:35:173
2074399231,6cyclictest0-21swapper/307:45:183
2074399231,6cyclictest0-21swapper/307:40:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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