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2025-08-30 - 01:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack5slot3s.osadl.org (updated Fri Aug 29, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
268802239163,24sleep10-21swapper/107:08:451
267012238163,24sleep30-21swapper/307:06:243
269132221150,58sleep20-21swapper/207:09:092
267752205168,24sleep00-21swapper/007:07:220
3143321750,3sleep02706499cyclictest07:15:330
270779910299,2cyclictest0-21swapper/209:03:072
153032650,5sleep215304-21grep09:05:262
27077993835,2cyclictest0-21swapper/210:53:162
27077993834,3cyclictest0-21swapper/211:12:202
2706499351,27cyclictest0-21swapper/012:05:270
2706499331,26cyclictest0-21swapper/009:53:190
2706499321,25cyclictest27929-21kworker/0:012:20:430
2706499321,25cyclictest0-21swapper/009:31:440
2706499321,24cyclictest0-21swapper/010:28:390
2706499311,23cyclictest0-21swapper/011:33:290
2706499311,23cyclictest0-21swapper/009:29:030
2706499301,24cyclictest0-21swapper/011:19:560
2706499301,24cyclictest0-21swapper/010:23:260
2706499301,23cyclictest0-21swapper/010:50:580
2706499301,23cyclictest0-21swapper/010:18:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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