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2024-07-16 - 15:39

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

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 rack4slot1s.osadl.org (updated Tue Jul 16, 2024 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
686021300,3sleep20-21swapper/208:34:132
686021300,3sleep20-21swapper/208:34:132
525721140,3sleep20-21swapper/211:19:302
525721140,3sleep20-21swapper/211:19:302
1729121100,3chrt0-21swapper/210:25:432
1729121100,3chrt0-21swapper/210:25:432
2130621050,3sleep20-21swapper/209:10:432
2622721040,3chrt0-21swapper/207:59:202
243612990,2chrt0-21swapper/209:19:232
243612990,2chrt0-21swapper/209:19:232
105862860,3sleep20-21swapper/207:19:122
105862860,3sleep20-21swapper/207:19:122
296952850,2sleep129698-21fschecks_time09:34:131
296952850,2sleep129698-21fschecks_time09:34:131
164632850,1chrt0-21swapper/107:34:141
154982850,1sleep10-21swapper/108:54:341
11892820,3chrt0-21swapper/209:44:152
114872810,2sleep30-21swapper/307:19:293
114872810,2sleep30-21swapper/307:19:293
846499672,44cyclictest26892-21chrt12:19:083
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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