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2026-03-10 - 11:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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.

Total number of samples: 50.5 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 rack5slot7s.osadl.org (updated Tue Mar 10, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32143224352202,89sleep00-21swapper19:07:180
324909916316,49cyclictest18002-21apt-get21:00:560
324909916316,107cyclictest12491-21apt-get23:46:590
324909916122,27cyclictest31190-21apt-get22:20:210
324909916012,39cyclictest29463-21apt22:10:000
324909915918,116cyclictest18328-21munin-run00:20:020
324909915917,23cyclictest383-21apt-get22:30:270
324909915913,41cyclictest20737-21/usr/sbin/munin21:15:490
324909915820,28cyclictest27266-21diskstats21:55:340
324909915812,117cyclictest19152-21/usr/sbin/munin21:05:120
324909915720,25cyclictest12515-21apt-get20:25:220
324909915717,24cyclictest7779-21df19:55:260
324909915713,120cyclictest8472-21munin-run23:20:020
32490991569,123cyclictest6865-21munin-run23:10:000
324909915616,26cyclictest14312-21apt23:55:000
324909915615,120cyclictest22365-21apt-get21:25:180
324909915613,121cyclictest110-21systemd-journal20:15:020
324909915613,119cyclictest12550-21ls23:45:060
324909915515,115cyclictest27977-21apt-get22:00:180
324909915429,16cyclictest0-21swapper22:50:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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