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2025-12-10 - 17:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Wed Dec 10, 2025 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33437992271219,17sleep20-21swapper/219:06:492
33437992271219,17sleep20-21swapper/219:06:492
33440482267218,16sleep60-21swapper/619:09:516
33440482267218,16sleep60-21swapper/619:09:506
33440362264218,17sleep30-21swapper/319:09:403
33440362264218,17sleep30-21swapper/319:09:403
33439072264212,17sleep40-21swapper/419:07:564
33439072264212,17sleep40-21swapper/419:07:564
33438792253220,12sleep00-21swapper/019:07:350
33438792253220,12sleep00-21swapper/019:07:340
33437112246221,16sleep50-21swapper/519:05:395
33437112246221,16sleep50-21swapper/519:05:395
33440492245219,17sleep70-21swapper/719:09:527
33440492245219,17sleep70-21swapper/719:09:517
33438222244219,16sleep10-21swapper/119:07:031
33438222244219,16sleep10-21swapper/119:07:031
34781402960,0sleep03478141-21expr23:10:270
34422752950,0sleep60-21swapper/622:05:206
334437199350,35cyclictest0-21swapper/600:35:216
3344362993530,3cyclictest0-21swapper/423:15:164
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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