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2024-11-13 - 00:16

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 Tue Nov 12, 2024 12:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
301792324314,8sleep10-21swapper/107:07:321
303402316304,4sleep20-21swapper/207:09:362
301052316309,5sleep00-21swapper/007:06:340
283142316308,5sleep30-21swapper/307:05:003
30620992970,296cyclictest2668-21kworker/u16:2+efi_rts_wq07:35:132
30616992960,295cyclictest11647-21kworker/u16:3+efi_rts_wq11:00:131
30611992960,295cyclictest27269-21kworker/u16:0+efi_rts_wq09:55:120
30623992950,294cyclictest10191-21kworker/u16:0+efi_rts_wq12:35:153
30620992950,294cyclictest25989-21kworker/u16:1+efi_rts_wq07:10:142
30620992950,294cyclictest17866-21kworker/u16:0+efi_rts_wq11:16:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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