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2025-06-21 - 22:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Sat Jun 21, 2025 00:46:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9657232354310,15sleep70-21swapper/719:08:2313
9655942353347,4sleep20-21swapper/219:06:428
9657842346324,14sleep140-21swapper/1419:09:196
9656642346323,15sleep80-21swapper/819:07:3614
9658022344323,14sleep90-21swapper/919:09:3115
9655982343319,14sleep50-21swapper/519:06:4511
9657812341324,10sleep110-21swapper/1119:09:163
9655732341318,15sleep150-21swapper/1519:06:227
9658352339319,13sleep40-21swapper/419:09:5810
9656662338314,15sleep100-21swapper/1019:07:382
9657832337316,13sleep130-21swapper/1319:09:195
9656132337313,15sleep00-21swapper/019:06:560
9655702334313,14sleep120-21swapper/1219:06:204
9623792332310,14sleep10-21swapper/119:05:041
9657222305283,14sleep60-21swapper/619:08:2212
9657962301279,13sleep30-21swapper/319:09:249
966252996542,13cyclictest1501ktimers/1423:04:556
966226995540,7cyclictest0-21swapper/622:06:3412
966219994543,1cyclictest0-21swapper/322:55:189
966230994140,1cyclictest1250686-21kworker/7:1+events23:40:0713
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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