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2024-04-27 - 11:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot4s.osadl.org (updated Sat Apr 27, 2024 00:44:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
375895994440,3cyclictest74-21kswapd023:45:111
375895994238,2cyclictest588805-21kworker/u8:0+events_unbound22:35:141
375903993431,2cyclictest74-21kswapd023:15:003
375895993431,2cyclictest637207-21kworker/u8:1+flush-259:022:55:001
375895993429,3cyclictest779927-21kworker/u8:2+events_unbound00:35:131
375903993328,3cyclictest588775-21latency_hist22:10:013
375903993327,4cyclictest751884-21latency_hist00:00:013
375903993228,3cyclictest74-21kswapd023:40:003
375893993125,3cyclictest381156-21cp19:15:010
375903992923,4cyclictest458144-21latency_hist20:30:013
375895992925,3cyclictest74-21kswapd023:25:001
375895992925,3cyclictest74-21kswapd023:25:001
375895992925,2cyclictest253-21systemd-journal22:10:011
375893992823,3cyclictest670837-21apt-get23:05:100
375893992821,5cyclictest422331-21latency_hist19:55:010
375899992724,2cyclictest74-21kswapd022:10:012
375899992722,3cyclictest484222-21kworker/u8:2+flush-259:021:10:302
375895992723,3cyclictest499817-21kworker/u8:3+flush-259:021:15:001
375893992622,3cyclictest74-21kswapd022:15:010
375903992522,2cyclictest498-21dbus-daemon22:15:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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