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2026-01-09 - 15:00

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 Fri Jan 09, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1973991040,9rtkit-daemon1972-21rtkit-daemon20:44:590
1973991010,9rtkit-daemon1972-21rtkit-daemon19:35:450
1973991010,6rtkit-daemon1972-21rtkit-daemon23:55:410
1973991000,9rtkit-daemon1972-21rtkit-daemon23:33:480
197399980,9rtkit-daemon1972-21rtkit-daemon23:23:450
197399980,8rtkit-daemon1972-21rtkit-daemon21:21:480
197399980,8rtkit-daemon1972-21rtkit-daemon21:21:480
197399970,8rtkit-daemon1972-21rtkit-daemon20:38:530
197399960,9rtkit-daemon1972-21rtkit-daemon19:43:160
197399950,8rtkit-daemon1972-21rtkit-daemon20:12:330
197399910,9rtkit-daemon1972-21rtkit-daemon23:29:240
31854512820,6sleep14497-21PK-Backend22:15:241
311711227846,23sleep20-21swapper/219:05:122
311831027741,13sleep30-21swapper/319:06:533
197399760,9rtkit-daemon1972-21rtkit-daemon20:44:011
31629132710,4sleep10-21swapper/121:10:281
311751026940,22sleep00-21swapper/019:05:170
311708326944,15sleep10-21swapper/119:05:101
32244222680,16chrt34-21ksoftirqd/200:06:532
311875899619,14cyclictest3138466-40apt-check20:01:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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