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2026-04-07 - 23:59

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #2

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack7slot2s.osadl.org (updated Tue Apr 07, 2026 12:49:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168592499312119,138cyclictest0-21swapper/010:35:170
168592499312119,138cyclictest0-21swapper/010:35:170
168592499306130,138cyclictest0-21swapper/012:07:050
168592499306130,138cyclictest0-21swapper/012:07:050
168592499303153,106cyclictest0-21swapper/007:32:000
168592499299148,106cyclictest0-21swapper/009:36:510
168592499299148,106cyclictest0-21swapper/009:36:510
168592499296140,101cyclictest1739557-21kworker/u10:4-nfsiod11:59:210
168592499276156,83cyclictest1719975-21kworker/u9:2+rpciod10:20:300
168592499271162,71cyclictest1734234-21ssh11:20:030
168592499271162,71cyclictest1734234-21ssh11:20:030
168592499266144,107cyclictest0-21swapper/012:10:500
168592499266144,107cyclictest0-21swapper/012:10:500
168592499266140,100cyclictest1721713-21kworker/u10:1-rpciod10:41:140
168592499266140,100cyclictest1721713-21kworker/u10:1-rpciod10:41:140
168592499264137,110cyclictest0-21swapper/011:00:350
168592499264137,110cyclictest0-21swapper/011:00:350
168592499263158,92cyclictest1719444-21ntpq10:11:020
16859249926269,94cyclictest1703021-21grep08:51:090
168592499261147,100cyclictest0-21swapper/007:41:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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