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2024-04-21 - 11:13

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 10 highest latencies:
System rackeslot4s.osadl.org (updated Sun Apr 21, 2024 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
872672994438,4cyclictest1129908-21latency_hist22:40:002
872672994138,2cyclictest1166903-21kworker/u8:0+flush-259:023:45:102
872672994138,2cyclictest1003310-21kworker/u8:4+events_unbound21:50:002
872666994037,2cyclictest1181059-21kworker/u8:2+flush-259:023:30:120
872666994037,2cyclictest1047709-21kworker/u8:0+flush-259:022:10:260
87267699381,35cyclictest1084642-21munin-run22:10:003
872672993835,2cyclictest1003310-21kworker/u8:4+flush-259:021:35:002
872676993728,5cyclictest990740-21latency_hist21:05:003
872672993734,2cyclictest74-21kswapd023:30:002
872672993732,3cyclictest74-21kswapd023:15:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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