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2025-07-02 - 18:13

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Wed Jul 02, 2025 00:46:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2142502375354,13sleep80-21swapper/819:08:1314
2109232360318,13sleep00-21swapper/019:05:080
2143922356336,13sleep90-21swapper/919:09:5015
2143432354333,14sleep30-21swapper/319:09:129
2142662352333,12sleep70-21swapper/719:08:2813
2109312352333,12sleep20-21swapper/219:05:108
2143672350330,13sleep40-21swapper/419:09:2910
2143282350330,13sleep130-21swapper/1319:09:065
2141462349330,12sleep60-21swapper/619:06:5012
2140762349329,13sleep140-21swapper/1419:05:546
2143412348328,13sleep10-21swapper/119:09:101
2141852348328,13sleep50-21swapper/519:07:2111
2109162347326,14sleep100-21swapper/1019:05:022
2142722345324,14sleep110-21swapper/1119:08:323
2142752342321,14sleep120-21swapper/1219:08:334
2109212338317,14sleep150-21swapper/1519:05:077
214838994949,0cyclictest0-21swapper/921:37:0515
214838994343,0cyclictest0-21swapper/922:28:1715
214838994136,4cyclictest0-21swapper/923:19:2915
214838994134,4cyclictest0-21swapper/900:10:4115
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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