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2025-07-15 - 22:22

OSADL QA Farm on Real-time of Mainline Linux

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

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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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 50 highest latencies:
System rackcslot7s.osadl.org (updated Tue Jul 15, 2025 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
372927021100,6sleep02197014-21PK-Backend09:05:130
372927021100,6sleep02197014-21PK-Backend09:05:120
37668032980,7sleep11753-21gnome-shell10:50:261
37668032980,7sleep11753-21gnome-shell10:50:261
37376422940,5sleep20-21swapper/209:28:332
162399860,66rtkit-daemon0-21swapper/307:06:153
368775728367,10sleep20-21swapper/207:07:442
3688078998216,49cyclictest1753-21gnome-shell09:29:133
3688078998216,48cyclictest1753-21gnome-shell09:31:123
162399820,5rtkit-daemon0-21swapper/309:38:453
3688070997969,7cyclictest1753-21gnome-shell09:35:111
162399790,5rtkit-daemon0-21swapper/310:30:483
162399790,5rtkit-daemon0-21swapper/310:30:483
368807399782,17cyclictest141rcu_preempt09:35:222
368784527439,9sleep10-21swapper/107:08:511
3688068997323,45cyclictest1753-21gnome-shell09:35:220
3688078997217,13cyclictest1753-21gnome-shell09:25:023
368807399726,10cyclictest0-21swapper/209:23:362
368807099724,7cyclictest141rcu_preempt09:30:021
3688070997157,5cyclictest26-21ksoftirqd/109:31:091
3688068997020,46cyclictest1753-21gnome-shell09:23:310
3688068997013,53cyclictest13-21ksoftirqd/009:27:280
368807899699,17cyclictest1753-21gnome-shell08:55:153
368806899699,46cyclictest141rcu_preempt09:31:050
368780526643,14sleep00-21swapper/007:08:210
368807899648,40cyclictest1753-21gnome-shell10:05:013
368807099644,7cyclictest141rcu_preempt09:23:351
3688078996313,26cyclictest1753-21gnome-shell11:57:143
3688078996313,26cyclictest1753-21gnome-shell11:57:143
3688078996313,25cyclictest1753-21gnome-shell10:47:593
368807899627,36cyclictest1753-21gnome-shell11:25:223
368807899627,32cyclictest3696424-21awk07:30:253
368807399622,56cyclictest1753-21gnome-shell09:32:362
3688078996117,25cyclictest1753-21gnome-shell11:35:173
3688078996114,27cyclictest1753-21gnome-shell12:00:273
3688078996112,25cyclictest1753-21gnome-shell10:17:323
162399610,9rtkit-daemon1622-21rtkit-daemon11:19:472
3688078996015,27cyclictest1753-21gnome-shell11:54:263
3688078996015,17cyclictest1753-21gnome-shell08:15:223
3688078996013,28cyclictest1753-21gnome-shell09:40:213
3688078996013,25cyclictest1753-21gnome-shell10:21:543
3688078996013,25cyclictest1753-21gnome-shell08:48:273
3688078996012,30cyclictest1753-21gnome-shell07:45:043
3688078996012,26cyclictest1753-21gnome-shell10:25:183
3688078996010,20cyclictest1753-21gnome-shell08:14:463
162399600,9rtkit-daemon1622-21rtkit-daemon12:21:213
162399600,9rtkit-daemon1622-21rtkit-daemon12:21:213
162399600,9rtkit-daemon1622-21rtkit-daemon11:41:572
368807899597,16cyclictest1753-21gnome-shell07:23:183
3688078995913,27cyclictest1753-21gnome-shell09:53:463
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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