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2024-07-16 - 16:02

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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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.

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 Mon Jul 15, 2024 12:44:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3826550995651,3cyclictest3947129-21lspci09:05:121
3826558994846,1cyclictest3967229-21fwupd09:18:413
3826554994538,5cyclictest3847178-21latency_hist07:30:002
3826558994441,2cyclictest26405-21kworker/u8:3+flush-259:012:10:123
3826558994339,3cyclictest74-21kswapd012:10:003
3826558994339,3cyclictest4014251-21kworker/u8:3+events_unbound10:04:453
3826550994337,4cyclictest4045461-21ssh10:10:141
3826554994236,4cyclictest3067417-21systemd-journal10:39:572
3826546994239,2cyclictest4029658-21kworker/u8:0+flush-259:010:45:000
3826554994135,4cyclictest3067417-21systemd-journal10:15:002
3826558993934,2cyclictest3919099-21kworker/u8:0+events_unbound09:06:323
3826554993936,2cyclictest74-21kswapd009:18:432
3826546993732,4cyclictest3982700-21kworker/u8:2+events_unbound09:45:010
3826558993330,2cyclictest26405-21kworker/u8:3+events_unbound12:20:013
3826558993330,2cyclictest26405-21kworker/u8:3+events_unbound12:20:003
3826554993228,2cyclictest3919099-21kworker/u8:0+events_unbound09:26:462
3826554993223,4cyclictest4045032-21latency_hist10:10:012
3826550993227,3cyclictest74-21kswapd011:10:011
3826554993128,2cyclictest74-21kswapd011:44:592
3826550993128,2cyclictest74-21kswapd009:18:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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