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2023-03-24 - 16:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #2

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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x86 Intel Core i3-2310E @2100 MHz, Linux 5.10.47-rt46 (Profile)

Latency plot of shadow in rack #8, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by a total of 2 SMIs that occured during the measurement.
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 --smi -q
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 rack8slot2s.osadl.org (updated Fri Mar 24, 2023 12:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23371991541,144cyclictest0-21swapper/107:12:341
2337099140136,2cyclictest0-21swapper/007:12:340
2337199138130,7cyclictest0-21swapper/108:13:431
2337099123121,1cyclictest0-21swapper/008:13:430
2337399120117,1cyclictest0-21swapper/307:12:343
2337399105101,1cyclictest0-21swapper/308:13:433
210002910,0sleep30-21swapper/311:12:413
2286929046,32sleep00-21swapper/007:11:190
2279329048,31sleep30-21swapper/307:10:223
2267829047,32sleep20-21swapper/207:08:522
2261729046,32sleep10-21swapper/107:08:031
22792840,0sleep10-21swapper/110:56:401
282972820,1sleep00-21swapper/009:23:080
23372993123,5cyclictest19827-21apt-get12:09:552
23370993126,3cyclictest26649-21ssh11:47:320
278612280,4sleep228-21ksoftirqd/211:18:212
23373992825,2cyclictest24394-21ssh10:47:233
23373992825,2cyclictest24394-21ssh10:47:233
121662280,1sleep10-21swapper/110:07:341
207312260,0sleep30-21swapper/312:39:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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