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2024-10-13 - 21:51

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 Sun Oct 13, 2024 12:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1233099124124,0cyclictest69-21ksoftirqd/708:42:167
1228799112110,1cyclictest3-21ksoftirqd/008:33:510
1232599108105,2cyclictest0-21swapper/611:47:266
12312999796,1cyclictest0-21swapper/408:33:514
12308999797,0cyclictest37-21ksoftirqd/312:03:513
12308999797,0cyclictest37-21ksoftirqd/312:03:513
12308999089,1cyclictest0-21swapper/308:42:163
12325996967,1cyclictest0-21swapper/611:22:246
1197625737,17sleep70-21swapper/707:08:227
1195125636,17sleep20-21swapper/207:08:022
12319995554,1cyclictest0-21swapper/511:05:265
12291994847,0cyclictest21-21ksoftirqd/111:05:261
1204124836,8sleep60-21swapper/607:09:186
12287994745,1cyclictest0-21swapper/011:22:250
1203024736,8sleep50-21swapper/507:09:095
1177424231,8sleep10-21swapper/107:05:361
1187324010,27sleep00-21swapper/007:06:550
1178923715,18sleep40-21swapper/407:05:474
1177623726,8sleep30-21swapper/307:05:373
12312993130,0cyclictest1713650irq/39-eth011:22:254
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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