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2023-06-09 - 13:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #2

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 
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x86 Intel Core i9-10900K @3700 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of shadow in rack #0, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rack0slot2s.osadl.org (updated Fri Jun 09, 2023 12:44:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25843102315310,3sleep30-21swapper/307:08:353
25843332309304,3sleep20-21swapper/207:08:542
25842652302296,4sleep60-21swapper/607:07:576
25822272302297,3sleep50-21swapper/507:05:065
25843272299288,4sleep70-21swapper/707:08:487
25841872299294,3sleep90-21swapper/907:06:499
25842552295289,4sleep80-21swapper/807:07:498
25822232294288,4sleep10-21swapper/107:05:021
25843542292287,3sleep00-21swapper/007:09:120
25841552291285,4sleep40-21swapper/407:06:254
2584682992020,0cyclictest0-21swapper/910:25:219
258468299200,20cyclictest0-21swapper/908:20:219
258468299200,0cyclictest0-21swapper/907:10:569
258467899200,20cyclictest0-21swapper/807:10:258
2584682991919,0cyclictest0-21swapper/911:40:209
2584682991919,0cyclictest0-21swapper/910:45:199
2584682991919,0cyclictest0-21swapper/910:10:249
2584682991919,0cyclictest0-21swapper/910:05:169
2584682991919,0cyclictest0-21swapper/909:15:209
2584682991919,0cyclictest0-21swapper/908:55:199
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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