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2025-11-14 - 17:32

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 Nov 14, 2025 00:46:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
241993621440,0sleep80-21swapper/800:11:4118
215555399560,22cyclictest0-21swapper/519:21:5915
215511025444,6sleep120-21swapper/1219:09:404
215486425449,3sleep130-21swapper/1319:07:015
215559399530,23cyclictest0-21swapper/1823:37:5910
215480125247,3sleep40-21swapper/419:06:3214
215473725044,3sleep190-21swapper/1919:05:4711
215393825036,8sleep150-21swapper/1519:05:237
2155593994918,2cyclictest3885569-21CPU10
215474124944,3sleep20-21swapper/219:05:5012
215559399486,33cyclictest0-21swapper/1823:06:1610
215474024841,4sleep10-21swapper/119:05:491
2155537994720,26cyclictest2349761-21kworker/u80:5+i91523:39:590
215501524740,4sleep140-21swapper/1419:08:426
215472324741,3sleep70-21swapper/719:05:3517
215485924638,5sleep90-21swapper/919:06:5719
215485524639,4sleep50-21swapper/519:06:5315
215470624641,3sleep60-21swapper/619:05:3416
2155553994515,29cyclictest3885565-21CPU15
215498824541,2sleep80-21swapper/819:08:1618
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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