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2025-12-06 - 16:43

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 Dec 06, 2025 00:46:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8515432367326,14sleep50-21swapper/519:08:5711
8516102366346,13sleep100-21swapper/1019:09:502
8513332359320,14sleep90-21swapper/919:06:0415
8515602358320,13sleep20-21swapper/219:09:118
8513222355333,14sleep150-21swapper/1519:05:547
8481672354334,13sleep10-21swapper/119:05:081
8490032353345,5sleep70-21swapper/719:05:1413
8516062351331,13sleep60-21swapper/619:09:4612
8514312349329,13sleep110-21swapper/1119:07:273
8513802349329,13sleep140-21swapper/1419:06:416
8514282348326,14sleep80-21swapper/819:07:2414
8514572345324,14sleep120-21swapper/1219:07:454
8513962345325,13sleep130-21swapper/1319:06:565
8514992344323,13sleep30-21swapper/319:08:249
8513242343322,13sleep00-21swapper/019:05:550
8514042338317,14sleep40-21swapper/419:07:0310
85203499410,36cyclictest0-21swapper/523:44:1211
852063993735,1cyclictest1065637-21kworker/u32:0+flush-259:000:00:336
852056993729,0cyclictest0-21swapper/1200:17:014
85205699365,30cyclictest909113-21tr20:15:154
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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