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2025-11-02 - 01:38

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 Sat Nov 01, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247560099274113,2724cyclictest2491788-21kworker/0:2+events20:05:160
247560099272012,2705cyclictest2561259-21kworker/0:2+events23:35:010
247560399270113,2684cyclictest2512719-21kworker/1:2+events21:35:121
247560899268212,2666cyclictest2522221-21kworker/2:2+events21:55:172
247560899267013,2651cyclictest2476919-21kworker/2:2+events19:15:122
247560099265913,2642cyclictest2539521-21kworker/0:2+events22:41:090
247560399261613,2599cyclictest2556513-21kworker/1:1+events23:40:011
247560899259413,2576cyclictest2476919-21kworker/2:2+events19:35:132
247560899255112,2535cyclictest2567514-21kworker/2:0+events23:55:152
247560899254013,2523cyclictest2516060-21kworker/2:2+events21:20:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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