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2025-12-15 - 04:13

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 rack0slot6s.osadl.org (updated Mon Dec 15, 2025 00:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24841562254248,4sleep10-21swapper/119:07:171
24841642241233,5sleep60-21swapper/619:07:2216
24844082240200,12sleep110-21swapper/1119:09:473
24840402237217,13sleep00-21swapper/019:06:160
24840542236215,13sleep90-21swapper/919:06:2419
24839882235214,13sleep70-21swapper/719:05:4317
24841422234215,12sleep130-21swapper/1319:07:095
24840802234215,12sleep30-21swapper/319:06:3913
24841662230210,12sleep80-21swapper/819:07:2318
24841502230222,5sleep170-21swapper/1719:07:139
24839662227216,7sleep180-21swapper/1819:05:3310
24841172226220,4sleep160-21swapper/1619:06:528
24840382226204,13sleep190-21swapper/1919:06:1411
24841372223204,12sleep100-21swapper/1019:07:052
24841772221202,12sleep140-21swapper/1419:07:306
24840052221200,13sleep150-21swapper/1519:05:517
24841302219201,11sleep40-21swapper/419:07:0014
24839832216197,12sleep50-21swapper/519:05:4115
24840432213194,12sleep20-21swapper/219:06:1712
24841092212193,12sleep120-21swapper/1219:06:484
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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