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2023-10-01 - 01:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #2

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rackbslot2s.osadl.org (updated Sun Aug 07, 2022 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
280635925647,6sleep30-21swapper/307:07:063
280608324031,6sleep10-21swapper/107:04:151
280618023828,6sleep00-21swapper/007:05:180
280611623627,6sleep20-21swapper/207:04:402
280663899240,23cyclictest0-21swapper/312:15:323
280663899210,12cyclictest0-21swapper/311:40:283
280663899205,14cyclictest0-21swapper/309:17:443
280663899200,5cyclictest0-21swapper/311:12:133
280663899200,5cyclictest0-21swapper/307:54:513
280663899200,19cyclictest0-21swapper/310:11:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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