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2023-06-10 - 10:07

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 
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x86 Intel Core i9-10900K @3700 MHz, Linux 6.3.0-rc5-rt8 (Profile)

Latency plot of shadow in rack #0, slot #6
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 rack0slot6s.osadl.org (updated Sat Jun 10, 2023 00:45:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8774532720,0sleep50-21swapper/519:27:3815
575120710,69pipewire0-21swapper/1819:05:4310
575120690,67pipewire0-21swapper/819:08:1318
575120660,64pipewire0-21swapper/019:08:470
575120650,64pipewire0-21swapper/1619:07:048
575120650,63pipewire0-21swapper/1419:06:506
575120650,63pipewire0-21swapper/1219:06:344
11298012650,0sleep80-21swapper/800:24:4718
8775282630,0sleep170-21swapper/1719:28:319
575520610,58pipewire-pulse0-21swapper/1319:05:135
575120610,59pipewire0-21swapper/1119:09:343
14111610,57low-memory-moni0-21swapper/519:09:1015
10309912600,0sleep90-21swapper/922:27:1819
575120590,58pipewire0-21swapper/919:08:2719
575120590,57pipewire0-21swapper/1919:08:3211
575120590,57pipewire0-21swapper/119:09:411
575120580,57pipewire0-21swapper/419:09:5514
575120570,55pipewire0-21swapper/1019:05:592
14111570,54low-memory-moni0-21swapper/1519:09:057
575120560,54pipewire0-21swapper/219:06:3912
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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