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2025-07-13 - 11:58

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 Sun Jul 13, 2025 00:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1676321730,5sleep01031699cyclictest23:57:360
10316991333,114cyclictest0-21swapper/021:15:150
103169911145,49cyclictest0-21swapper/022:00:200
62772980,2sleep06280-21grep23:00:270
52592930,5sleep11031799cyclictest23:00:041
10316998553,7cyclictest0-21swapper/023:05:190
10316998517,52cyclictest11104-21fschecks_count23:50:220
10316998517,52cyclictest11104-21fschecks_count23:50:220
1031699794,38cyclictest0-21swapper/022:35:200
1031699791,68cyclictest17786-21netstat23:15:260
1031799783,50cyclictest7850irq/56-dwc_otg22:35:201
171102770,2sleep21031899cyclictest21:47:302
171102770,2sleep21031899cyclictest21:47:302
10316997727,11cyclictest0-21swapper/022:40:140
154802760,5sleep11031799cyclictest22:30:211
145802760,4sleep123-21ksoftirqd/121:44:511
1031699766,62cyclictest0-21swapper/020:20:180
285252730,2sleep10-21swapper/120:00:091
10316997319,43cyclictest0-21swapper/022:11:370
180572720,5sleep31031999cyclictest21:49:403
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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