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2025-08-27 - 01:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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 here to display the system's profile data.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rackfslot7s.osadl.org (updated Tue Aug 26, 2025 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
244686299303614,3016cyclictest2502999-21kworker/2:2+events22:25:122
244685599287713,2858cyclictest2448002-21kworker/0:2+events19:15:130
244685599282211,2807cyclictest2470780-21kworker/0:1+events20:24:590
244686599280814,2791cyclictest2470853-21kworker/3:0+events20:30:213
244685999280213,2787cyclictest2490358-21kworker/1:2+events21:25:191
244685599277611,2761cyclictest2519027-21kworker/0:1+events23:13:150
244686599275913,2743cyclictest2463388-21kworker/3:2+events20:20:253
244686299274012,2723cyclictest2493400-21kworker/2:0+events21:35:152
244686299272013,2703cyclictest2475987-21kworker/2:0+events20:45:012
244685599271713,2700cyclictest2469140-21kworker/0:0+events20:18:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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