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2023-09-23 - 22:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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 
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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: ondemand
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack5slot4s.osadl.org (updated Sat Sep 23, 2023 12:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1386399127118,8cyclictest0-21swapper/007:10:190
129052117102,10sleep30-21swapper/307:05:293
136242116103,10sleep00-21swapper/007:08:580
135542116103,10sleep20-21swapper/207:08:042
133942116103,10sleep10-21swapper/107:05:581
13869999997,1cyclictest0-21swapper/207:10:192
13863997672,3cyclictest22491-21kworker/u16:2+events_unbound07:15:020
13869996459,3cyclictest22491-21kworker/u16:2+events_unbound08:40:352
13869995955,3cyclictest22491-21kworker/u16:2+events_unbound12:30:372
13863995753,3cyclictest21126-21kworker/u16:3+events_unbound12:25:030
219022540,0sleep20-21swapper/208:10:282
13865995351,1cyclictest14031-21apt-get07:10:191
13865995248,3cyclictest21126-21kworker/u16:3+events_unbound07:36:271
13863995046,3cyclictest21126-21kworker/u16:3+events_unbound07:35:320
13863994945,3cyclictest22491-21kworker/u16:2+events_unbound08:30:340
315442480,0sleep00-21swapper/011:35:340
13865994642,3cyclictest21126-21kworker/u16:3+events_unbound10:45:201
13869994440,3cyclictest21126-21kworker/u16:3+events_unbound07:50:512
13863994440,3cyclictest21126-21kworker/u16:3+events_unbound09:00:350
13863994440,3cyclictest21126-21kworker/u16:3+events_unbound07:40:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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