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2025-07-12 - 18:56

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 50 highest latencies:
System rackcslot7s.osadl.org (updated Sat Jul 12, 2025 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
196683924360,10sleep10-21swapper/107:05:211
196683924360,10sleep10-21swapper/107:05:211
1623991110,9rtkit-daemon1622-21rtkit-daemon11:10:213
1623991080,9rtkit-daemon1622-21rtkit-daemon10:23:503
1623991080,9rtkit-daemon1622-21rtkit-daemon09:37:173
1623991050,9rtkit-daemon1622-21rtkit-daemon09:29:533
199933521000,7sleep126-21ksoftirqd/108:35:161
162399960,8rtkit-daemon1622-21rtkit-daemon10:49:413
162399920,8rtkit-daemon1622-21rtkit-daemon09:24:203
162399920,73rtkit-daemon0-21swapper/007:08:320
162399920,73rtkit-daemon0-21swapper/007:08:320
162399910,9rtkit-daemon1622-21rtkit-daemon11:22:193
162399910,9rtkit-daemon1622-21rtkit-daemon11:22:193
162399910,8rtkit-daemon1622-21rtkit-daemon11:33:413
20364322890,5sleep00-21swapper/010:20:250
162399880,8rtkit-daemon1622-21rtkit-daemon11:19:393
19798032850,8sleep02197014-21PK-Backend07:40:210
162399780,6rtkit-daemon2197014-21PK-Backend08:37:322
162399770,8rtkit-daemon1622-21rtkit-daemon07:32:330
196630827645,22sleep30-21swapper/307:05:053
196630827645,22sleep30-21swapper/307:05:043
162399760,5rtkit-daemon0-21swapper/107:53:461
162399750,5rtkit-daemon0-21swapper/209:02:392
162399740,6rtkit-daemon2197014-21PK-Backend08:21:332
196630726741,16sleep20-21swapper/207:05:042
196630726741,16sleep20-21swapper/207:05:032
162399620,9rtkit-daemon1622-21rtkit-daemon11:05:262
162399620,9rtkit-daemon1622-21rtkit-daemon09:36:322
19687422600,7chrt2197014-21PK-Backend07:10:263
162399600,9rtkit-daemon1622-21rtkit-daemon10:50:562
196793099588,12cyclictest13-21ksoftirqd/010:15:010
162399580,9rtkit-daemon1622-21rtkit-daemon09:30:303
162399580,9rtkit-daemon1622-21rtkit-daemon09:30:293
20042932570,8sleep22197014-21PK-Backend08:50:142
162399560,8rtkit-daemon1622-21rtkit-daemon08:45:561
1967930995419,19cyclictest13-21ksoftirqd/012:40:010
1967930995419,19cyclictest13-21ksoftirqd/012:40:010
162399540,8rtkit-daemon1622-21rtkit-daemon11:42:172
162399540,8rtkit-daemon1622-21rtkit-daemon08:28:330
162399540,8rtkit-daemon1622-21rtkit-daemon08:28:330
196794099523,21cyclictest1753-21gnome-shell07:26:503
196794099520,48cyclictest1622-21rtkit-daemon11:36:323
162399520,8rtkit-daemon1622-21rtkit-daemon10:47:162
196793599511,27cyclictest1753-21gnome-shell10:00:012
196793099517,17cyclictest13-21ksoftirqd/009:10:020
1967930995131,9cyclictest13-21ksoftirqd/010:15:280
162399510,8rtkit-daemon1622-21rtkit-daemon11:13:292
162399510,8rtkit-daemon1622-21rtkit-daemon10:40:282
20398842500,5chrt0-21swapper/210:30:252
196793399500,46cyclictest1622-21rtkit-daemon08:56:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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