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2026-05-21 - 13:08

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 Thu May 21, 2026 00:46:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31276602358321,30sleep50-21swapper/519:07:2011
31277892355317,13sleep120-21swapper/1219:09:054
31277322353310,14sleep150-21swapper/1519:08:187
31275792353298,13sleep90-21swapper/919:06:2015
31275942347326,14sleep40-21swapper/419:06:3210
31275772346322,15sleep70-21swapper/719:06:1813
31278522345323,14sleep110-21swapper/1119:09:523
31276892345322,15sleep140-21swapper/1419:07:456
31277832344322,14sleep60-21swapper/619:08:5812
31275782344323,13sleep80-21swapper/819:06:1914
31276112343320,15sleep00-21swapper/019:06:430
31277872342318,15sleep100-21swapper/1019:09:022
31275192340320,13sleep30-21swapper/319:05:429
31275092340322,12sleep130-21swapper/1319:05:355
31278362339319,13sleep20-21swapper/219:09:428
31277352315294,14sleep10-21swapper/119:08:211
3128230999331,62cyclictest0-21swapper/320:23:599
3128224999318,75cyclictest0-21swapper/120:23:581
3128238999033,28cyclictest0-21swapper/520:23:5911
3128251998626,30cyclictest0-21swapper/1020:23:582
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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