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2025-04-02 - 05:17

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 Apr 02, 2025 00:47:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16879762421398,15sleep140-21swapper/1419:08:386
16878772393361,6sleep60-21swapper/619:07:4212
16878162390367,15sleep00-21swapper/019:07:030
16880192346324,14sleep90-21swapper/919:09:0515
16845372345320,15sleep70-21swapper/719:05:0213
16879292344321,15sleep100-21swapper/1019:08:192
16878122344325,12sleep130-21swapper/1319:07:005
16880812343320,14sleep20-21swapper/219:09:478
16880852340317,15sleep50-21swapper/519:09:4911
16880692340321,12sleep80-21swapper/819:09:3714
16879862340317,14sleep30-21swapper/319:08:439
16877142340317,15sleep150-21swapper/1519:05:597
16878842339314,15sleep120-21swapper/1219:07:474
16880432337315,14sleep110-21swapper/1119:09:243
16879202336314,14sleep40-21swapper/419:08:1210
16877362331309,14sleep10-21swapper/119:06:161
1688546994542,2cyclictest1704651-21kworker/u32:1+flush-259:019:33:431
1688595994213,29cyclictest15650irq_work/1523:00:097
168859599403,32cyclictest1947560-21kworker/u32:2+events_unbound22:36:447
1688595993729,7cyclictest0-21swapper/1519:10:067
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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