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2025-10-25 - 21:19

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 Sat Oct 25, 2025 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28775712236171,20sleep40-21swapper/407:06:014
28777602223167,18sleep60-21swapper/607:08:446
28776512220181,26sleep10-21swapper/107:07:101
28777172218185,22sleep20-21swapper/207:08:072
28776482211181,20sleep70-21swapper/707:07:087
28777772209180,19sleep50-21swapper/507:08:595
28778132208181,17sleep30-21swapper/307:09:293
28775402204177,17sleep00-21swapper/007:05:320
2878085993129,1cyclictest2956186-21fwupd09:21:524
2878094992521,4cyclictest0-21swapper/707:19:597
287809499250,24cyclictest3008166-21turbostat.cron10:55:007
287809499250,21cyclictest0-21swapper/708:45:137
2878094992421,2cyclictest2974029-21apt-get09:55:137
287809499240,0cyclictest0-21swapper/709:30:157
2878091992422,1cyclictest2971177-21apt-get09:50:136
287808399240,23cyclictest2915881-21awk08:15:013
287808399240,23cyclictest0-21swapper/312:35:153
2878079992421,2cyclictest3045384-21awk11:59:592
2878077992423,1cyclictest0-21swapper/112:30:131
2878077992423,1cyclictest0-21swapper/110:05:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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