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2026-04-14 - 17:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack3slot6s.osadl.org (updated Tue Apr 14, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17367211595,15sleep00-21swapper/007:09:190
17347211594,15sleep20-21swapper/207:09:052
17329211397,11sleep10-21swapper/107:08:521
17126211190,16sleep30-21swapper/307:06:143
14932740,1sleep31494-21sh11:23:403
103712730,1sleep30-21swapper/311:32:143
83452710,1sleep38346-21cpuspeed_turbos09:50:133
305122690,1sleep121-21rcuc/111:53:321
216362630,4sleep01744599cyclictest11:10:180
222392230,0sleep0101ktimersoftd/010:04:570
17448992218,2cyclictest0-21swapper/309:10:113
1744899221,19cyclictest0-21swapper/311:45:123
1744899221,19cyclictest0-21swapper/309:35:133
1744899221,19cyclictest0-21swapper/309:05:123
1744899211,18cyclictest4933-21kworker/u8:112:35:143
1744899210,19cyclictest0-21swapper/311:05:113
1744699210,19cyclictest0-21swapper/109:40:131
1744799200,3cyclictest0-21swapper/211:48:042
17448991914,3cyclictest805-21ssh12:30:133
17447991916,2cyclictest18436-21kworker/u8:011:08:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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