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2024-11-23 - 17:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 rack0slot1s.osadl.org (updated Sat Nov 23, 2024 12:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17687991190,118cyclictest0-21swapper/708:58:517
1766499115115,0cyclictest37-21ksoftirqd/308:58:513
17649999191,0cyclictest1725250irq/36-eth1-rx-10:08:411
17649998484,0cyclictest21-21ksoftirqd/107:13:571
17669997978,1cyclictest0-21swapper/412:23:064
17687997069,1cyclictest0-21swapper/711:20:547
17669996563,1cyclictest0-21swapper/411:32:094
17664996464,0cyclictest37-21ksoftirqd/311:20:543
17643996060,0cyclictest3-21ksoftirqd/012:23:060
1727925332,18sleep10-21swapper/107:07:391
17643994545,0cyclictest3-21ksoftirqd/011:32:080
1530424513,18sleep70-21swapper/707:05:047
1712224019,18sleep20-21swapper/207:05:312
1715423615,18sleep30-21swapper/307:05:563
1722723313,17sleep00-21swapper/007:06:580
17669993231,1cyclictest0-21swapper/409:08:274
173992298,18sleep60-21swapper/607:09:206
1730022513,8sleep40-21swapper/407:07:594
1743622313,7sleep50-21swapper/507:09:525
17674991917,1cyclictest0-21swapper/509:47:475
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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