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2024-04-20 - 09:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 20 highest latencies:
System rack7slot3s.osadl.org (updated Sat Apr 20, 2024 00:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
178322870,3sleep217795-21ssh21:27:362
178322870,3sleep217795-21ssh21:27:362
137002850,2sleep20-21swapper/221:22:372
2685999837,66cyclictest0-21swapper/021:17:270
2685999816,49cyclictest0-21swapper/023:02:280
162962810,1sleep00-21swapper/020:12:270
249352790,5sleep02685999cyclictest23:46:380
2685999764,48cyclictest0-21swapper/021:57:280
2685999764,48cyclictest0-21swapper/021:57:280
325722730,5sleep12686099cyclictest21:47:321
2686199707,16cyclictest26953-21timerandwakeup00:32:432
2686299693,16cyclictest0-21swapper/323:07:243
101892690,3sleep121-21rcuc/122:01:001
101892690,3sleep121-21rcuc/122:01:001
26860996816,42cyclictest7950irq/56-dwc_otg23:37:281
2685999676,25cyclictest0-21swapper/019:12:310
2685999675,32cyclictest18356-21seq22:12:260
26859996612,30cyclictest0-21swapper/022:57:440
26859996612,30cyclictest0-21swapper/022:57:440
26859996519,25cyclictest0-21swapper/023:07:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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