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2026-04-14 - 19:36

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #2

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.

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 rack7slot2s.osadl.org (updated Tue Apr 14, 2026 12:49:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19000399329187,104cyclictest0-21swapper/010:12:040
19000399329187,104cyclictest0-21swapper/010:12:040
19000399323180,107cyclictest0-21swapper/011:05:550
19000399323180,107cyclictest0-21swapper/011:05:550
19000399323152,116cyclictest238754-21kworker/u10:12-rpciod11:26:200
19000399323148,136cyclictest0-21swapper/009:55:000
19000399323148,136cyclictest0-21swapper/009:55:000
19000399320181,103cyclictest0-21swapper/011:01:510
19000399320181,103cyclictest0-21swapper/011:01:510
19000399320174,110cyclictest0-21swapper/011:20:580
19000399320174,110cyclictest0-21swapper/011:20:580
19000399319180,103cyclictest0-21swapper/010:07:020
19000399318172,111cyclictest0-21swapper/010:15:540
19000399318128,149cyclictest204175-21kworker/u10:11+rpciod08:35:030
19000399318128,149cyclictest204175-21kworker/u10:11+rpciod08:35:030
19000399317173,107cyclictest0-21swapper/012:11:470
19000399317151,124cyclictest0-21swapper/009:35:220
19000399316156,120cyclictest0-21swapper/011:55:530
19000399316156,120cyclictest0-21swapper/011:55:530
19000399316138,137cyclictest0-21swapper/009:55:470
19000399316138,137cyclictest0-21swapper/009:55:470
19000399315175,102cyclictest0-21swapper/010:25:390
19000399315175,102cyclictest0-21swapper/010:25:390
19000399313169,108cyclictest0-21swapper/010:57:210
19000399313169,108cyclictest0-21swapper/010:57:210
19000399313169,108cyclictest0-21swapper/010:57:210
19000399312174,102cyclictest0-21swapper/012:30:530
19000399312174,102cyclictest0-21swapper/012:30:530
19000399310168,94cyclictest171rcu_preempt11:42:110
19000399310149,114cyclictest0-21swapper/007:11:080
19000399309166,103cyclictest0-21swapper/007:55:010
19000399309135,134cyclictest0-21swapper/012:02:010
19000399309135,134cyclictest0-21swapper/012:02:010
19000399307130,138cyclictest0-21swapper/012:20:010
19000399307130,138cyclictest0-21swapper/012:20:010
19000399307128,137cyclictest206599-21timerwakeupswit08:47:000
19000399307128,137cyclictest206599-21timerwakeupswit08:46:590
19000399306127,140cyclictest0-21swapper/010:01:040
19000399306127,140cyclictest0-21swapper/010:01:040
19000399304163,92cyclictest171rcu_preempt08:20:330
19000399304163,92cyclictest171rcu_preempt08:20:330
19000399304141,126cyclictest0-21swapper/008:02:020
19000399304141,126cyclictest0-21swapper/008:02:020
19000399304139,111cyclictest0-21swapper/012:40:070
19000399304139,111cyclictest0-21swapper/012:40:070
19000399303142,110cyclictest0-21swapper/011:30:440
19000399303142,110cyclictest0-21swapper/011:30:440
19000399303135,122cyclictest0-21swapper/009:41:130
19000399303135,122cyclictest0-21swapper/009:41:130
19000399303135,120cyclictest0-21swapper/010:46:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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