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2025-11-28 - 21:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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 rack0slot5s.osadl.org (updated Fri Nov 28, 2025 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
364312364340,15sleep40-21swapper/419:10:0010
364282360336,14sleep10-21swapper/119:09:571
362212341317,15sleep140-21swapper/1419:07:136
361672341316,15sleep150-21swapper/1519:06:267
363912340317,14sleep20-21swapper/219:09:268
361552340316,15sleep50-21swapper/519:06:1611
363802339316,14sleep100-21swapper/1019:09:182
362712339315,15sleep70-21swapper/719:07:5413
361102339315,15sleep30-21swapper/319:05:429
364032338315,14sleep130-21swapper/1319:09:375
363532338294,15sleep60-21swapper/619:08:5812
363582336312,14sleep90-21swapper/919:09:0115
361832336313,14sleep120-21swapper/1219:06:394
361632336313,14sleep110-21swapper/1119:06:223
363212335312,14sleep80-21swapper/819:08:2814
361882335311,15sleep00-21swapper/019:06:430
36782995315,25cyclictest0-21swapper/620:39:0512
36782995315,25cyclictest0-21swapper/619:55:1012
36782995315,25cyclictest0-21swapper/619:33:1212
36782995314,25cyclictest0-21swapper/622:06:5712
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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