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2025-04-19 - 20:34

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 Apr 19, 2025 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1623991030,90rtkit-daemon0-21swapper/307:05:323
5843182980,7sleep32197014-21PK-Backend08:45:213
6069272870,8sleep10-21swapper/109:55:141
162399840,6rtkit-daemon2197014-21PK-Backend11:31:092
162399840,6rtkit-daemon2197014-21PK-Backend11:31:092
162399840,5rtkit-daemon0-21swapper/207:50:152
162399840,10rtkit-daemon1753-21gnome-shell07:15:182
54935528041,32sleep20-21swapper/207:08:542
162399790,6rtkit-daemon2197014-21PK-Backend07:26:192
162399780,7rtkit-daemon2197014-21PK-Backend11:47:552
162399780,5rtkit-daemon0-21swapper/209:29:172
162399750,5rtkit-daemon0-21swapper/209:44:072
162399730,6rtkit-daemon2197014-21PK-Backend07:44:592
54918327045,16sleep10-21swapper/107:06:401
162399700,49rtkit-daemon1753-21gnome-shell07:58:272
6476462670,7chrt2197014-21PK-Backend12:10:243
549575996710,32cyclictest655753-21seq12:35:360
549575996710,32cyclictest655753-21seq12:35:360
54957599651,43cyclictest597416-21seq09:20:560
54927526544,15sleep00-21swapper/007:07:520
6226212630,4chrt622624-21dump-pmu-power10:49:591
549575996315,25cyclictest614402-21latency_hist10:20:020
54957599621,37cyclictest616363-21seq10:25:040
54957599611,35cyclictest603970-21seq09:42:290
54957599602,32cyclictest602101-40apt-check09:36:210
54957599601,42cyclictest0-21swapper/011:42:270
54957599592,29cyclictest555443-21/usr/sbin/munin07:25:130
54957599591,31cyclictest572848-21chrt08:11:130
162399590,9rtkit-daemon1622-21rtkit-daemon07:36:361
162399590,38rtkit-daemon0-21swapper/209:20:592
54958299588,14cyclictest1753-21gnome-shell11:30:253
54958299588,14cyclictest1753-21gnome-shell11:30:253
54957599582,32cyclictest624306-40apt-check10:51:270
54957599582,31cyclictest614785-21cpuspeed_turbos10:20:150
54957599582,28cyclictest1753-21gnome-shell12:08:260
54957599582,27cyclictest585899-21df_inode08:50:130
54957599581,31cyclictest600177-21chrt09:32:070
54957599581,29cyclictest574714-21seq08:17:570
5700762570,35sleep21753-21gnome-shell08:05:152
54957599562,32cyclictest1753-21gnome-shell10:48:460
54957599552,30cyclictest1753-21gnome-shell07:45:510
54957599552,27cyclictest580723-21diskstats08:35:160
54957599551,28cyclictest1753-21gnome-shell10:57:190
54957599551,25cyclictest0-21swapper/008:45:510
54958299542,16cyclictest1753-21gnome-shell11:26:533
549582995418,11cyclictest629103-21date11:10:033
549582995418,11cyclictest629103-21date11:10:033
54957599542,28cyclictest1753-21gnome-shell08:01:290
54957599542,27cyclictest1753-21gnome-shell07:41:570
54957599541,30cyclictest636506-21seq11:33:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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