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2025-08-30 - 01:00

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 Fri Aug 29, 2025 00:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28976862246225,13sleep60-21swapper/619:06:2316
28977852242221,13sleep80-21swapper/819:07:4418
28977402241222,12sleep130-21swapper/1319:07:095
28945102241220,13sleep90-21swapper/919:05:0419
28979042240220,12sleep50-21swapper/519:09:2115
28977142238218,13sleep100-21swapper/1019:06:462
28978802236217,12sleep20-21swapper/219:08:5812
28978472234215,12sleep10-21swapper/119:08:371
28978422234214,12sleep170-21swapper/1719:08:339
28978942233213,12sleep160-21swapper/1619:09:128
28977782232212,12sleep40-21swapper/419:07:4014
28978852230211,12sleep70-21swapper/719:09:0417
28976452230211,12sleep180-21swapper/1819:05:5310
28976162230211,12sleep150-21swapper/1519:05:317
28977272227206,13sleep00-21swapper/019:06:560
28978702225206,12sleep140-21swapper/1419:08:516
28978282224205,12sleep30-21swapper/319:08:1913
28978672222203,12sleep110-21swapper/1119:08:473
28978442220200,13sleep190-21swapper/1919:08:3511
28945142219200,12sleep120-21swapper/1219:05:074
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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