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2024-10-03 - 22:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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.
Unexpectedly long latencies may be caused by SMIs
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 rack1slot6s.osadl.org (updated Thu Oct 03, 2024 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2443991220,6rtkit-daemon0-21swapper/210:23:383
2443991220,6rtkit-daemon0-21swapper/210:23:383
3147099924,80cyclictest0-21swapper/210:58:402
3147099874,61cyclictest0-21swapper/210:53:382
244399870,6rtkit-daemon0-21swapper/207:58:512
3147099863,64cyclictest1304-21runrttasks07:54:332
3147099853,63cyclictest19206-21yum-updatesd-he06:11:272
3147099844,72cyclictest9357-21unixbench-2d06:54:002
3147099844,72cyclictest0-21swapper/209:48:332
7592830,6sleep1760-21cat10:53:401
3147099824,72cyclictest0-21swapper/209:18:372
3147099824,71cyclictest0-21swapper/208:38:542
3147099823,69cyclictest12931-21crond08:08:222
3147099823,61cyclictest24420-21munin-node10:38:402
3147099814,70cyclictest0-21swapper/210:18:372
3147099814,69cyclictest0-21swapper/208:48:512
3147099814,60cyclictest0-21swapper/208:48:222
3147099804,68cyclictest0-21swapper/208:33:232
3147099804,59cyclictest0-21swapper/206:23:432
3147099804,59cyclictest0-21swapper/206:23:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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