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2025-09-16 - 17:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot6s.osadl.org (updated Tue Sep 16, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2230991020,6rtkit-daemon0-21swapper/008:14:580
223099960,4rtkit-daemon2229-21rtkit-daemon09:59:530
225752950,6sleep122574-21head08:29:521
223099950,6rtkit-daemon0-21swapper/008:47:040
223099950,6rtkit-daemon0-21swapper/006:27:170
223099950,6rtkit-daemon0-21swapper/006:21:250
223099950,6rtkit-daemon0-21swapper/005:56:330
223099940,6rtkit-daemon0-21swapper/010:50:070
223099940,6rtkit-daemon0-21swapper/010:34:520
223099940,6rtkit-daemon0-21swapper/010:21:450
223099940,6rtkit-daemon0-21swapper/010:05:310
223099940,6rtkit-daemon0-21swapper/008:50:560
223099940,6rtkit-daemon0-21swapper/008:34:190
223099940,6rtkit-daemon0-21swapper/008:12:130
223099940,6rtkit-daemon0-21swapper/006:37:460
223099940,6rtkit-daemon0-21swapper/006:19:250
223099940,6rtkit-daemon0-21swapper/006:07:400
223099940,6rtkit-daemon0-21swapper/005:59:480
223099930,6rtkit-daemon0-21swapper/010:48:140
223099930,6rtkit-daemon0-21swapper/010:34:220
223099930,6rtkit-daemon0-21swapper/010:27:300
223099930,6rtkit-daemon0-21swapper/010:27:300
223099930,6rtkit-daemon0-21swapper/008:06:050
223099930,6rtkit-daemon0-21swapper/007:58:430
223099930,6rtkit-daemon0-21swapper/007:52:060
223099930,6rtkit-daemon0-21swapper/006:32:170
223099930,6rtkit-daemon0-21swapper/006:10:100
223099930,6rtkit-daemon0-21swapper/006:10:100
223099920,6rtkit-daemon0-21swapper/010:19:150
223099920,6rtkit-daemon0-21swapper/008:26:120
223099920,6rtkit-daemon0-21swapper/008:23:120
223099920,6rtkit-daemon0-21swapper/008:23:120
223099920,6rtkit-daemon0-21swapper/006:44:160
223099910,6rtkit-daemon0-21swapper/010:40:140
223099910,6rtkit-daemon0-21swapper/010:14:150
223099910,6rtkit-daemon0-21swapper/008:43:190
223099910,6rtkit-daemon0-21swapper/007:47:440
223099910,6rtkit-daemon0-21swapper/005:54:030
2994799874,13cyclictest0-21swapper/205:39:482
2994799873,12cyclictest7038-21grep06:49:532
2994799853,9cyclictest1944-21vmstat05:30:152
2994799853,9cyclictest1944-21vmstat05:30:152
2994799844,73cyclictest0-21swapper/210:29:452
223099840,5rtkit-daemon2229-21rtkit-daemon09:27:473
223099840,4rtkit-daemon2229-21rtkit-daemon09:29:403
2994799834,55cyclictest0-21swapper/208:25:022
2994799834,12cyclictest0-21swapper/209:49:452
2994799833,8cyclictest19868-21idleruntime-cro09:34:272
223099830,5rtkit-daemon2229-21rtkit-daemon08:54:493
2994799828,48cyclictest0-21swapper/207:54:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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