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2024-07-16 - 15:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #8

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot8s.osadl.org (updated Tue Jul 16, 2024 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
288991840,62ptp4l0-21swapper/107:05:331
94480790,74rtkit-daemon0-21swapper/507:07:517
1841326042,9sleep00-21swapper/007:05:080
145122600,0sleep30-21swapper/311:50:305
145122600,0sleep30-21swapper/311:50:295
1840725948,9sleep70-21swapper/707:05:039
2169625839,9sleep60-21swapper/607:09:528
2144025543,10sleep100-21swapper/1007:06:062
1975325443,8sleep110-21swapper/1107:05:193
87292530,0sleep50-21swapper/511:00:387
2154025342,9sleep40-21swapper/407:07:376
181082460,0sleep50-21swapper/512:40:007
2210799218,9cyclictest6060-21kworker/u24:107:45:018
2209899213,14cyclictest0-21swapper/411:25:006
2209899212,15cyclictest0-21swapper/409:40:016
288991190,1ptp4l82492sleep108:14:521
2209899190,7cyclictest0-21swapper/412:20:006
2207999194,9cyclictest0-21swapper/009:25:000
2207999191,16cyclictest0-21swapper/009:10:220
74332180,1sleep101033-21runrttasks09:35:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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