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2025-05-02 - 12:40

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 Fri May 02, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2359313997733,39cyclictest0-21swapper/000:15:260
2359317997634,35cyclictest0-21swapper/220:20:012
2359313997629,42cyclictest0-21swapper/020:45:000
2359317997031,34cyclictest0-21swapper/221:50:302
2359317997029,36cyclictest0-21swapper/222:35:302
2359317997027,6cyclictest0-21swapper/200:05:302
2359317996827,4cyclictest0-21swapper/220:00:322
235931799661,22cyclictest0-21swapper/222:50:002
235931399663,51cyclictest0-21swapper/021:50:130
2359317996226,7cyclictest0-21swapper/221:29:592
2359317996125,8cyclictest0-21swapper/223:50:242
2359317996125,8cyclictest0-21swapper/223:50:242
2359313996130,5cyclictest2382568-21cron21:25:010
235931799601,36cyclictest0-21swapper/220:15:022
2359313996028,5cyclictest2372280-21unixbench_multi20:20:310
235931699598,8cyclictest2387703-21apt-get21:55:021
2359316995837,14cyclictest231ktimers/121:20:201
2359313995853,2cyclictest0-21swapper/019:30:010
235931799571,22cyclictest0-21swapper/220:55:012
235931799554,12cyclictest2408832-21apt-get00:00:012
235931799551,33cyclictest0-21swapper/222:05:002
235931799551,26cyclictest0-21swapper/200:35:012
235931399551,43cyclictest0-21swapper/022:40:120
2359316995448,3cyclictest22-21rcuc/100:35:201
2359316995448,3cyclictest22-21rcuc/100:35:201
2359317995329,4cyclictest0-21swapper/219:49:592
235931799532,30cyclictest0-21swapper/222:30:022
235931799521,45cyclictest0-21swapper/221:55:132
235931799521,25cyclictest0-21swapper/221:20:002
2359316995231,14cyclictest231ktimers/123:35:151
2359316995231,14cyclictest231ktimers/121:25:151
2359313995239,9cyclictest2402108-21sendmail23:20:000
235931799511,12cyclictest27350irq/343-s-wl18xx21:35:182
235931399515,10cyclictest0-21swapper/022:35:010
235931799502,32cyclictest0-21swapper/219:30:012
2359316995029,16cyclictest231ktimers/120:45:191
2359316995028,16cyclictest231ktimers/100:20:171
235931699502,14cyclictest22-21rcuc/121:15:021
235931799492,22cyclictest0-21swapper/220:25:012
235931699497,16cyclictest22-21rcuc/122:10:011
235931699497,16cyclictest22-21rcuc/122:10:001
2359316994937,8cyclictest2411410-21grep00:10:301
2359316994930,14cyclictest231ktimers/100:00:151
2359316994929,12cyclictest231ktimers/120:25:171
235931699491,15cyclictest0-21swapper/122:45:021
2359317994839,5cyclictest2384195-21grep21:30:342
235931799481,29cyclictest0-21swapper/222:55:012
235931799481,29cyclictest0-21swapper/222:55:002
2359316994828,14cyclictest231ktimers/122:00:131
2359316994827,16cyclictest231ktimers/123:50:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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