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2025-12-03 - 06:11

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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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 rackcslot7s.osadl.org (updated Wed Dec 03, 2025 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
414580222430,6sleep1251rcuc/119:05:291
414580222430,6sleep1251rcuc/119:05:281
1666221070,5sleep11753-21gnome-shell22:10:011
1666221070,5sleep11753-21gnome-shell22:10:011
1623991060,8rtkit-daemon1622-21rtkit-daemon23:56:362
1905821020,7chrt2197014-21PK-Backend22:15:222
1623991000,8rtkit-daemon1622-21rtkit-daemon19:21:272
1623991000,8rtkit-daemon1622-21rtkit-daemon19:21:262
162399980,9rtkit-daemon1622-21rtkit-daemon00:31:442
162399970,9rtkit-daemon1622-21rtkit-daemon23:45:332
162399970,9rtkit-daemon1622-21rtkit-daemon22:20:352
162399950,8rtkit-daemon1622-21rtkit-daemon21:59:042
162399910,8rtkit-daemon1622-21rtkit-daemon22:59:352
162399900,8rtkit-daemon1622-21rtkit-daemon22:46:382
162399880,9rtkit-daemon1622-21rtkit-daemon19:44:372
162399880,9rtkit-daemon1622-21rtkit-daemon19:44:362
162399860,9rtkit-daemon1622-21rtkit-daemon19:10:352
418082840,5sleep22197014-21PK-Backend23:20:142
162399840,8rtkit-daemon1622-21rtkit-daemon23:52:002
162399840,8rtkit-daemon1622-21rtkit-daemon22:38:152
162399760,67rtkit-daemon0-21swapper/319:05:253
162399760,67rtkit-daemon0-21swapper/319:05:243
414622727039,24sleep00-21swapper/019:08:050
414622727039,24sleep00-21swapper/019:08:050
414651899694,43cyclictest1753-21gnome-shell21:05:203
414651899656,36cyclictest1753-21gnome-shell21:37:003
414651599651,10cyclictest4160414-21ntp_states19:45:252
4146515996436,10cyclictest34-21ksoftirqd/219:17:332
414651599640,60cyclictest1622-21rtkit-daemon23:00:152
414608426446,13sleep20-21swapper/219:06:192
414608426446,13sleep20-21swapper/219:06:192
414651899635,18cyclictest1753-21gnome-shell00:25:163
414650499637,20cyclictest1753-21gnome-shell21:12:210
558092620,6sleep22197014-21PK-Backend00:00:192
414651899624,36cyclictest1753-21gnome-shell19:17:293
4146509996231,16cyclictest26-21ksoftirqd/123:26:531
162399620,9rtkit-daemon1622-21rtkit-daemon21:47:162
510552610,7sleep12197014-21PK-Backend23:45:291
414651899616,31cyclictest1753-21gnome-shell20:36:583
414651899616,30cyclictest1753-21gnome-shell22:27:033
414651899616,28cyclictest1753-21gnome-shell23:00:023
414651899615,28cyclictest1753-21gnome-shell19:20:263
414651899615,28cyclictest1753-21gnome-shell19:20:263
4146515996136,10cyclictest34-21ksoftirqd/222:07:022
4146515996136,10cyclictest34-21ksoftirqd/222:07:012
4146515996134,10cyclictest34-21ksoftirqd/222:01:062
414650499611,16cyclictest4150276-21chrt19:18:310
414651899608,30cyclictest1753-21gnome-shell21:10:183
414651899607,29cyclictest1753-21gnome-shell00:35:263
414651899607,27cyclictest1753-21gnome-shell22:47:303
414651899607,27cyclictest1753-21gnome-shell22:43:293
414651899607,27cyclictest1753-21gnome-shell21:52:063
414651899606,29cyclictest1753-21gnome-shell20:30:293
414651899606,29cyclictest1753-21gnome-shell00:07:113
414651899606,28cyclictest1753-21gnome-shell23:47:093
414651899606,28cyclictest1753-21gnome-shell22:01:133
414651899606,28cyclictest1753-21gnome-shell20:27:593
414651899606,27cyclictest1753-21gnome-shell22:10:343
414651899606,27cyclictest1753-21gnome-shell20:17:133
414651899606,25cyclictest1753-21gnome-shell23:31:163
414651899606,25cyclictest1753-21gnome-shell23:31:163
414651899605,32cyclictest1753-21gnome-shell00:15:013
414651899605,28cyclictest1753-21gnome-shell19:54:443
414651899605,28cyclictest1753-21gnome-shell00:21:303
414651899604,29cyclictest1753-21gnome-shell23:40:233
414651899596,30cyclictest1753-21gnome-shell22:20:233
414651899596,29cyclictest1753-21gnome-shell00:15:033
414651899596,28cyclictest1753-21gnome-shell23:35:153
414651899596,28cyclictest1753-21gnome-shell21:48:063
414651899596,28cyclictest1753-21gnome-shell21:00:383
414651899596,28cyclictest1753-21gnome-shell20:45:373
414651899596,27cyclictest1753-21gnome-shell23:21:403
414651899596,27cyclictest1753-21gnome-shell23:18:133
414651899596,27cyclictest1753-21gnome-shell22:56:063
414651899596,27cyclictest1753-21gnome-shell22:07:023
414651899596,27cyclictest1753-21gnome-shell22:07:013
414651899596,27cyclictest1753-21gnome-shell21:34:043
414651899596,27cyclictest1753-21gnome-shell20:56:383
414651899596,27cyclictest1753-21gnome-shell20:00:103
414651899596,26cyclictest1753-21gnome-shell20:05:213
414651899596,26cyclictest1753-21gnome-shell19:45:493
414651899595,28cyclictest1753-21gnome-shell23:25:413
414651899595,28cyclictest1753-21gnome-shell23:05:323
414651899595,28cyclictest1753-21gnome-shell22:35:343
414651899595,27cyclictest1753-21gnome-shell20:40:173
414651899595,25cyclictest1753-21gnome-shell22:15:123
414651899595,17cyclictest1753-21gnome-shell00:00:223
414651899594,28cyclictest1753-21gnome-shell19:25:023
4146515995930,7cyclictest34-21ksoftirqd/220:30:242
414651899586,28cyclictest1753-21gnome-shell19:30:093
414651899585,28cyclictest1753-21gnome-shell23:12:363
414651899585,28cyclictest1753-21gnome-shell22:34:163
414651899585,28cyclictest1753-21gnome-shell22:34:153
414651899585,27cyclictest1753-21gnome-shell23:51:073
414651899585,27cyclictest1753-21gnome-shell00:34:423
414651599585,38cyclictest0-21swapper/223:09:112
414650999580,54cyclictest1622-21rtkit-daemon20:17:371
41585232570,8sleep01753-21gnome-shell19:40:250
41585232570,8sleep01753-21gnome-shell19:40:240
414651899575,27cyclictest1753-21gnome-shell21:59:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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