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2025-04-24 - 15:34

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 Thu Apr 24, 2025 00:46:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36745212770,0sleep60-21swapper/622:02:2716
58366220750,73data-loop.00-21swapper/619:05:5016
58366220730,72data-loop.00-21swapper/1819:05:1410
58366220720,70data-loop.00-21swapper/019:09:000
58366620700,46data-loop.00-21swapper/1019:06:022
58366220680,62data-loop.00-21swapper/719:07:1817
58366220660,63data-loop.00-21swapper/1319:06:565
58366220640,62data-loop.00-21swapper/1919:08:4911
58366220640,62data-loop.00-21swapper/1719:06:339
3522985996421,42cyclictest0-21swapper/1820:04:2110
58366620630,38data-loop.00-21swapper/919:05:0119
58366220630,61data-loop.00-21swapper/419:08:1114
58366220630,61data-loop.00-21swapper/1419:08:106
58366220620,60data-loop.00-21swapper/1619:05:058
58366220620,59data-loop.00-21swapper/319:06:4813
58366220610,59data-loop.00-21swapper/1519:08:157
58366220610,58data-loop.00-21swapper/819:08:3618
58366220610,58data-loop.00-21swapper/1219:06:064
58366220610,58data-loop.00-21swapper/1119:05:583
58366220600,56data-loop.00-21swapper/519:05:4315
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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