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2023-03-27 - 06:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #7

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 i3-4360 CPU @3700 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of shadow in rack #0, slot #7
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot7s.osadl.org (updated Mon Mar 27, 2023 00:43:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2650995212360,21sleep20-21swapper/219:07:212
2651047210961,20sleep10-21swapper/119:08:011
265087029973,19sleep00-21swapper/019:05:470
265081229973,20sleep30-21swapper/319:05:053
265136499650,64cyclictest0-21swapper/219:46:592
265135799650,64cyclictest2665277-21kworker/0:120:03:140
265135799650,64cyclictest2665277-21kworker/0:120:03:140
265135799650,64cyclictest0-21swapper/023:14:340
265135799650,64cyclictest0-21swapper/023:14:330
265135799650,64cyclictest0-21swapper/022:45:120
2651368996463,1cyclictest2766348-21sensors23:55:203
265136499640,63cyclictest0-21swapper/221:29:402
2651357996463,0cyclictest0-21swapper/023:09:050
2651357996463,0cyclictest0-21swapper/021:53:180
265135799640,64cyclictest0-21swapper/023:02:050
265135799640,64cyclictest0-21swapper/022:51:300
265135799640,64cyclictest0-21swapper/022:43:590
265135799640,64cyclictest0-21swapper/022:39:330
265135799640,64cyclictest0-21swapper/020:33:150
265135799640,64cyclictest0-21swapper/019:34:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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