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2026-07-12 - 22:44

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 Sun Jul 12, 2026 00:46:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8970312390371,12sleep90-21swapper/919:06:3415
8970962374335,32sleep140-21swapper/1419:07:286
8972752366322,13sleep130-21swapper/1319:09:195
8972672358338,13sleep60-21swapper/619:09:1212
8973152353334,13sleep110-21swapper/1119:09:493
8969682352332,13sleep70-21swapper/719:05:4413
8970562351331,13sleep150-21swapper/1519:06:567
8970072351315,13sleep80-21swapper/819:06:1714
8972822350331,13sleep30-21swapper/319:09:269
8969802350331,12sleep20-21swapper/219:05:558
8972712349329,13sleep100-21swapper/1019:09:162
8938222349330,13sleep00-21swapper/019:05:050
8972202348328,13sleep50-21swapper/519:08:3911
8970532348330,12sleep120-21swapper/1219:06:544
8970172346326,13sleep10-21swapper/119:06:261
8970032345323,14sleep40-21swapper/419:06:1310
897696996362,1cyclictest923354-21kworker/u32:0+flush-259:019:50:2011
89772399534,25cyclictest0-21swapper/1419:40:376
897706994541,3cyclictest863859-21kworker/u32:1+flush-259:019:16:2514
897716994240,1cyclictest832071-21kworker/u32:2+flush-259:019:20:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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