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2026-05-29 - 21:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 rack3slot6s.osadl.org (updated Fri May 29, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36422111100,6sleep30-21swapper/307:07:393
3708210998,6sleep00-21swapper/007:08:230
3578210184,12sleep20-21swapper/207:06:502
377429887,6sleep10-21swapper/107:09:081
235512850,0sleep20-21swapper/209:59:072
94202700,0sleep20-21swapper/210:16:412
64462270,7sleep30-21swapper/309:05:173
116492250,1sleep30-21swapper/311:26:173
387399231,20cyclictest4754-21kworker/u8:212:35:093
387399221,19cyclictest0-21swapper/310:40:113
387299210,4cyclictest0-21swapper/211:08:052
387199210,19cyclictest0-21swapper/112:35:111
387399200,2cyclictest0-21swapper/310:55:123
387399200,2cyclictest0-21swapper/310:55:113
3872992017,2cyclictest4323-21kworker/u8:207:46:012
3872992017,2cyclictest29169-21kworker/u8:109:32:022
387299200,4cyclictest0-21swapper/210:49:052
3873991916,2cyclictest32105-21kworker/u8:109:23:033
3872991916,2cyclictest24167-21kworker/u8:208:31:052
3872991916,2cyclictest24167-21kworker/u8:208:27:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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