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2025-12-17 - 15:23

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 Wed Dec 17, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
203146999288112,2864cyclictest2065382-21kworker/2:0+events20:55:192
203146399281313,2797cyclictest2032933-21kworker/0:0+events19:30:000
203146999280813,2790cyclictest2044480-21kworker/2:2+events19:55:172
203146399280811,2792cyclictest2128215-21kworker/0:0+events00:10:200
203146799280513,2788cyclictest2036806-21kworker/1:1+events19:45:191
203146799277213,2756cyclictest2102676-21kworker/1:2+events22:55:021
203147399270413,2687cyclictest2121558-21kworker/3:0+events23:50:123
203147399268813,2671cyclictest2063868-21kworker/3:0+events20:50:183
203146799258310,2569cyclictest2055739-21kworker/1:1+events20:25:191
203147399257112,2555cyclictest2079659-21kworker/3:0+events21:45:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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