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2025-11-06 - 21:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 50 highest latencies:
System rackeslot6s.osadl.org (updated Thu Nov 06, 2025 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
781390997431,38cyclictest21250irq/208-8000000.ethernet07:55:240
781390997431,38cyclictest21250irq/208-8000000.ethernet07:55:240
781390997334,34cyclictest0-21swapper/010:25:280
781397997032,33cyclictest0-21swapper/308:40:283
781397997028,36cyclictest0-21swapper/311:10:003
781397997026,5cyclictest789173-21grep07:50:263
78139599691,23cyclictest0-21swapper/207:55:002
781397996726,5cyclictest0-21swapper/311:45:013
781390996729,30cyclictest0-21swapper/012:20:290
781395996641,20cyclictest0-21swapper/209:55:322
781395996623,38cyclictest0-21swapper/209:40:302
781390996635,28cyclictest832176-21munin-plugin-st12:05:000
781390996620,37cyclictest0-21swapper/009:45:200
781397996528,31cyclictest0-21swapper/310:05:243
781397996528,31cyclictest0-21swapper/310:05:243
78139599656,54cyclictest826168-21apt-get11:30:012
781395996531,28cyclictest0-21swapper/208:55:282
781397996433,28cyclictest801234-21munin-plugin-st09:05:013
781395996424,35cyclictest0-21swapper/208:25:282
781394996444,14cyclictest231ktimers/110:10:131
781390996428,32cyclictest0-21swapper/011:00:000
781390996423,34cyclictest0-21swapper/009:55:290
781390996423,32cyclictest0-21swapper/009:00:300
781390996415,8cyclictest0-21swapper/012:15:310
781397996329,27cyclictest0-21swapper/308:15:193
781397996226,4cyclictest0-21swapper/309:10:013
78139599623,30cyclictest0-21swapper/211:15:012
781395996232,24cyclictest0-21swapper/208:00:312
781395996224,33cyclictest0-21swapper/207:55:262
781395996224,33cyclictest0-21swapper/207:55:262
781397996132,24cyclictest814003-21apt-get10:20:003
781397996132,24cyclictest814003-21apt-get10:20:003
781397996126,6cyclictest834608-21grep12:15:313
781395996122,31cyclictest0-21swapper/211:20:312
78139099613,52cyclictest0-21swapper/010:40:010
78139099613,52cyclictest0-21swapper/010:40:010
781395996031,25cyclictest311ktimers/211:40:122
781395996024,30cyclictest0-21swapper/212:35:292
781395996022,31cyclictest0-21swapper/207:10:312
781395996020,32cyclictest0-21swapper/207:15:292
781395996017,32cyclictest0-21swapper/208:10:002
781394996036,12cyclictest231ktimers/111:45:121
781390996016,7cyclictest0-21swapper/010:20:050
781390996016,7cyclictest0-21swapper/010:20:050
781397995930,8cyclictest784927-21grep07:25:263
781395995921,30cyclictest0-21swapper/207:25:262
781395995918,33cyclictest0-21swapper/211:05:302
78139599591,10cyclictest0-21swapper/209:35:192
781390995926,26cyclictest0-21swapper/010:05:000
781390995924,31cyclictest0-21swapper/011:10:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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