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2026-05-24 - 15:41

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 20 highest latencies:
System rackfslot7s.osadl.org (updated Sun May 24, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
299996799422521,4199cyclictest3067608-21kworker/2:1+events23:00:192
299997099343718,3411cyclictest3017313-21kworker/3:2+events20:10:193
299996099338816,3366cyclictest3083814-21kworker/0:2+events23:40:140
299996799321414,3195cyclictest3046917-21kworker/2:0+events21:55:182
299996799309516,3074cyclictest3018118-21kworker/2:2+events20:15:142
299997099308515,3065cyclictest3064518-21kworker/3:1+events22:40:113
299996099304914,3029cyclictest3090662-21kworker/0:2+events23:50:130
299997099302314,3003cyclictest3101550-21kworker/3:0+events00:35:133
299996099300914,2991cyclictest3077348-21kworker/0:1+events23:10:180
299996799299914,2981cyclictest3012642-21kworker/2:0+events20:05:202
299996799299914,2981cyclictest3012642-21kworker/2:0+events20:05:202
299997099293013,2914cyclictest3024161-21kworker/3:2+events20:35:163
299996599290715,2889cyclictest3067729-21kworker/1:2+events22:45:141
299997099290313,2886cyclictest3015655-21kworker/3:0+events20:00:203
299997099287714,2859cyclictest3033642-21kworker/3:1+events21:00:113
299997099280613,2790cyclictest2999495-21kworker/3:1+events19:19:393
29999709928045,2795cyclictest3087603-21kworker/3:2+events23:43:183
299997099280413,2787cyclictest3087603-21kworker/3:2+events23:49:043
299997099280313,2786cyclictest3031944-21kworker/3:2+events20:59:003
299997099280313,2786cyclictest3020906-21kworker/3:1+events20:19:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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