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2024-11-25 - 14:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #3

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.
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 10 highest latencies:
System rackcslot3s.osadl.org (updated Mon Nov 25, 2024 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
59862317303,5sleep30-21swapper/319:05:093
78042316304,4sleep20-21swapper/219:09:482
74992315308,5sleep00-21swapper/019:05:540
75572314307,4sleep10-21swapper/119:06:391
8085993020,298cyclictest13225-21kworker/u16:3+efi_rts_wq23:05:122
8086992970,296cyclictest17672-21kworker/u16:0+efi_rts_wq20:55:123
8084992960,295cyclictest27826-21kworker/u16:0+efi_rts_wq22:40:131
8083992960,295cyclictest1087-21kworker/u16:2+efi_rts_wq21:10:150
8085992940,293cyclictest20867-21kworker/u16:1+efi_rts_wq22:15:132
8085992940,293cyclictest12461-21kworker/u16:1+efi_rts_wq20:05:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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