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2025-11-03 - 04:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #8

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 rack0slot8s.osadl.org (updated Mon Nov 03, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275991910,81ptp4l0-21swapper/119:09:091
3160526655,9sleep70-21swapper/719:09:079
118592660,0sleep30-21swapper/320:45:245
3148926554,9sleep00-21swapper/019:07:230
3141226554,9sleep110-21swapper/1119:06:223
3139326554,9sleep50-21swapper/519:06:037
3141826352,9sleep40-21swapper/419:06:276
3138126251,9sleep60-21swapper/619:05:528
3166324331,9sleep100-21swapper/1019:09:582
3205699233,15cyclictest0-21swapper/423:15:006
3205699212,15cyclictest0-21swapper/423:15:006
3205699202,14cyclictest0-21swapper/400:04:596
3208399191,17cyclictest0-21swapper/1019:35:172
3206599181,12cyclictest25378-21kworker/u24:221:50:008
3203899182,10cyclictest0-21swapper/022:50:000
275991180,14ptp4l0-21swapper/119:52:471
224342180,0sleep50-21swapper/519:35:197
321462170,0chrt0-21swapper/322:35:245
3206599173,7cyclictest0-21swapper/621:25:268
3206099172,9cyclictest0-21swapper/522:44:597
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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