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2026-01-07 - 02:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Wed Jan 07, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
270329066,8sleep20-21swapper/219:09:562
245629065,9sleep30-21swapper/319:06:443
253528963,8sleep00-21swapper/019:07:460
258628764,18sleep10-21swapper/119:08:271
279799220,22cyclictest56550irq/124-enp0s3122:24:582
279099221,20cyclictest0-21swapper/000:05:140
2795992119,1cyclictest0-21swapper/120:45:131
279099211,19cyclictest0-21swapper/022:50:190
279799201,19cyclictest0-21swapper/200:02:032
2790992019,1cyclictest0-21swapper/022:05:130
279799190,3cyclictest0-21swapper/221:05:142
2797991817,0cyclictest0-21swapper/219:45:122
280099170,13cyclictest0-21swapper/320:30:143
279799175,12cyclictest0-21swapper/221:20:502
279799170,1cyclictest0-21swapper/220:50:122
2800991611,2cyclictest0-21swapper/319:15:133
2795991614,1cyclictest0-21swapper/100:35:001
279099163,6cyclictest26696-21perf23:19:590
2800991511,3cyclictest22041-21grep20:55:173
280099143,8cyclictest3848-21run-parts23:40:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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