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2025-08-30 - 01:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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 rack0slot5s.osadl.org (updated Fri Aug 29, 2025 00:47:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33055252390359,20sleep30-21swapper/319:08:299
33055782382355,18sleep00-21swapper/019:09:140
33054162365310,18sleep40-21swapper/419:06:5310
33054252362310,43sleep130-21swapper/1319:07:025
33054772357330,18sleep70-21swapper/719:07:4413
33055522353326,18sleep100-21swapper/1019:08:522
33054592349291,18sleep80-21swapper/819:07:2914
33053822348318,21sleep60-21swapper/619:06:2312
33054262343314,18sleep140-21swapper/1419:07:036
33055992342313,19sleep20-21swapper/219:09:328
33056132341312,19sleep120-21swapper/1219:09:424
33053552340312,19sleep150-21swapper/1519:05:597
33052822340312,18sleep10-21swapper/119:05:291
33055532337309,19sleep110-21swapper/1119:08:533
33053982337311,17sleep50-21swapper/519:06:3811
33053252335311,15sleep90-21swapper/919:05:3715
330594099599,25cyclictest0-21swapper/623:31:1312
330594099588,25cyclictest0-21swapper/622:58:1612
330594099588,25cyclictest0-21swapper/622:58:1612
330594099578,36cyclictest0-21swapper/620:02:3212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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