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2025-12-22 - 23:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 rackcslot7s.osadl.org (updated Mon Dec 22, 2025 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
141795923470,17sleep3421ksoftirqd/307:05:193
151189821270,7sleep04497-21PK-Backend11:30:290
14486652940,6sleep20-21swapper/208:30:292
14938462920,7sleep00-21swapper/010:40:220
14427742800,5sleep14497-21PK-Backend08:15:151
141862827252,14sleep10-21swapper/107:07:031
141858726344,14sleep00-21swapper/007:06:300
197399620,9rtkit-daemon1972-21rtkit-daemon10:28:450
197399620,10rtkit-daemon1972-21rtkit-daemon08:25:351
141867626243,13sleep20-21swapper/207:07:402
197399610,9rtkit-daemon1972-21rtkit-daemon07:41:260
197399600,9rtkit-daemon1972-21rtkit-daemon10:31:421
197399600,9rtkit-daemon1972-21rtkit-daemon10:29:481
197399600,9rtkit-daemon1972-21rtkit-daemon09:56:441
197399600,9rtkit-daemon1972-21rtkit-daemon09:37:411
197399590,9rtkit-daemon1972-21rtkit-daemon10:45:341
197399580,9rtkit-daemon1972-21rtkit-daemon11:19:281
197399580,8rtkit-daemon1972-21rtkit-daemon11:15:130
1418992995819,13cyclictest438-20systemd-journal10:35:100
197399570,9rtkit-daemon1972-21rtkit-daemon11:20:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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