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2024-11-25 - 14:36

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 Mon Nov 25, 2024 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3770921995854,3cyclictest3942663-21kworker/u8:0+flush-259:022:07:273
3770910994541,3cyclictest75-21kswapd022:07:270
3770914994439,4cyclictest3932015-21cat21:45:001
3770914994236,4cyclictest3864450-21latency_hist20:40:011
3770921993732,3cyclictest3854173-21kworker/u8:1+flush-259:022:10:253
3770921993730,4cyclictest4019682-21ntpq23:05:203
3770919993734,2cyclictest3900716-21kworker/u8:4+flush-259:022:10:012
3770919993633,2cyclictest3942663-21kworker/u8:0+flush-259:022:20:002
3770914993631,3cyclictest4026147-21latency_hist23:15:011
3770914993530,4cyclictest3894432-21ntpq21:05:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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