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2023-01-31 - 04:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 Atom E3950 @1600 MHz, Linux 5.6.19-rt12 (Profile)

Latency plot of shadow in rack #9, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 20 highest latencies:
System rack9slot2s (updated Thu Oct 29, 2020 00:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9170983730,365rtkit-daemon0-21swapper/219:07:452
143272167157,8sleep70-21swapper/719:08:167
118332950,0sleep656-21ksoftirqd/621:36:306
118332950,0sleep656-21ksoftirqd/621:36:306
14717997417,46cyclictest0-21swapper/000:10:260
1475299689,33cyclictest0-21swapper/722:00:167
1472399689,29cyclictest0-21swapper/121:20:171
1472399689,29cyclictest0-21swapper/121:20:171
88642560,1sleep442-21ksoftirqd/421:35:004
14733995615,25cyclictest0-21swapper/300:15:473
1475299556,11cyclictest22760-21gltestperf20:20:077
1472399556,23cyclictest15610-21gltestperf19:10:071
14723995251,1cyclictest6667-21needreboot19:50:141
1472399520,36cyclictest0-21swapper/121:12:141
14752995049,0cyclictest13092-21grep21:00:087
14723995048,1cyclictest14806-21gltestperf20:05:051
14723994826,11cyclictest0-21swapper/121:36:441
14723994826,11cyclictest0-21swapper/121:36:441
14717994745,1cyclictest31067-21grep21:55:140
14752994610,18cyclictest0-21swapper/721:41:157
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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