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2026-03-27 - 04:11

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 Mar 27, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
60202221191,20sleep20-21swapper/219:09:392
40932203165,25sleep10-21swapper/119:05:111
59382202164,25sleep30-21swapper/319:08:353
40922202165,25sleep00-21swapper/019:05:100
2582921300,3sleep2615099cyclictest19:50:232
6154998986,2cyclictest0-21swapper/323:27:493
6154998885,2cyclictest0-21swapper/320:04:463
6154998077,2cyclictest0-21swapper/322:48:013
6154996562,2cyclictest0-21swapper/323:10:453
122962610,1sleep20-21swapper/200:35:242
6154995451,2cyclictest0-21swapper/319:13:323
6154995350,2cyclictest0-21swapper/300:25:393
260362480,1sleep00-21swapper/019:50:250
6154994136,2cyclictest19669-21ntp_kernel_pll_20:50:193
614399351,13cyclictest27701-40dnf23:59:501
6154993432,1cyclictest0-21swapper/320:22:033
326062340,2sleep10-21swapper/122:55:191
614399333,2cyclictest86550irq/126-enp1s0-21:35:581
614399331,8cyclictest0-21swapper/119:24:191
614399330,11cyclictest0-21swapper/100:33:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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