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2025-08-30 - 01:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Fri Aug 29, 2025 00:46:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32955122377371,4sleep150-21swapper/1519:05:497
32955692370344,22sleep120-21swapper/1219:06:354
32956992369333,12sleep40-21swapper/419:08:0410
32956262362342,13sleep30-21swapper/319:07:149
32957002359319,14sleep50-21swapper/519:08:0511
32955212357337,13sleep70-21swapper/719:05:5713
32956622353333,13sleep80-21swapper/819:07:3514
32958212352331,13sleep140-21swapper/1419:09:356
32956192352332,13sleep130-21swapper/1319:07:095
32958352351329,14sleep60-21swapper/619:09:4312
32957372351331,13sleep00-21swapper/019:08:320
32957502350331,12sleep100-21swapper/1019:08:412
32955472349329,13sleep90-21swapper/919:06:1615
32958262348328,13sleep10-21swapper/119:09:381
32957962348329,12sleep110-21swapper/1119:09:143
32956012348329,12sleep20-21swapper/219:06:578
3296328995345,4cyclictest0-21swapper/1320:01:475
3296328995147,4cyclictest0-21swapper/1321:23:415
3296328995147,4cyclictest0-21swapper/1320:54:515
329632899506,40cyclictest0-21swapper/1320:38:535
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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