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2026-05-11 - 12:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, 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 rack8slot4s.osadl.org (updated Mon May 11, 2026 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6725382262182,65sleep30-21swapper/319:09:333
6724712250182,22sleep10-21swapper/119:08:361
6724862240166,23sleep70-21swapper/719:08:507
6723642238201,24sleep60-21swapper/619:07:046
6724882227162,20sleep00-21swapper/019:08:510
6723032224187,25sleep40-21swapper/419:06:134
6723452223187,24sleep50-21swapper/519:06:475
6723012217184,22sleep20-21swapper/219:06:112
672833992723,3cyclictest767907-21ls21:49:597
672833992622,4cyclictest0-21swapper/723:15:137
67282199260,25cyclictest779707-21idleruntime-cro22:10:003
672827992521,3cyclictest718172-21chrt20:25:125
67282799250,24cyclictest0-21swapper/522:25:135
67282599250,24cyclictest0-21swapper/421:00:194
672821992523,1cyclictest0-21swapper/323:50:203
672812992521,3cyclictest741316-21awk21:05:001
672810992521,3cyclictest809240-21awk23:00:010
67283399240,24cyclictest773828-21awk22:00:007
67283399240,23cyclictest857856-21apt-get00:20:127
67283399240,0cyclictest0-21swapper/720:45:137
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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