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2026-04-13 - 10:03

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 Mon Apr 13, 2026 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4224142367325,14sleep80-21swapper/819:09:2114
4224002367328,13sleep140-21swapper/1419:09:116
4223112367331,12sleep50-21swapper/519:07:5711
4222072360351,6sleep150-21swapper/1519:06:487
4223302359339,13sleep70-21swapper/719:08:1613
4222492358339,13sleep100-21swapper/1019:07:152
4223472356337,13sleep30-21swapper/319:08:289
4223982355347,5sleep120-21swapper/1219:09:084
4189542354335,12sleep110-21swapper/1119:05:063
4224342353333,13sleep90-21swapper/919:09:3915
4224442352332,13sleep10-21swapper/119:09:471
4222332352332,13sleep00-21swapper/019:07:050
4222832351330,14sleep20-21swapper/219:07:398
4224192350331,13sleep130-21swapper/1319:09:255
4223502350330,13sleep60-21swapper/619:08:3112
4224472348328,13sleep40-21swapper/419:09:4910
422978994140,1cyclictest0-21swapper/1419:10:156
42297899360,23cyclictest0-21swapper/1420:43:016
422951993535,0cyclictest0-21swapper/520:15:1411
42296699330,30cyclictest0-21swapper/1023:55:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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