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2026-04-03 - 03:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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: 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 rack7slot3s.osadl.org (updated Fri Apr 03, 2026 00:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2615821700,1sleep30-21swapper/321:16:113
869999966,80cyclictest0-21swapper/000:00:270
8699999533,23cyclictest0-21swapper/023:35:270
8699998525,33cyclictest22630-21latency_hist23:10:150
122712820,3sleep2301ktimersoftd/200:15:342
869999811,55cyclictest0-21swapper/022:30:260
869999806,23cyclictest0-21swapper/022:35:190
232142780,4sleep2870799cyclictest21:13:282
165852780,2sleep00-21swapper/021:44:500
8699997732,22cyclictest0-21swapper/019:10:150
276452760,2sleep10-21swapper/120:00:331
869999756,52cyclictest25097-21munin-plugin-st21:55:140
201862750,3sleep320187-21date21:10:153
869999740,54cyclictest7105-21/usr/sbin/munin23:30:270
869999731,39cyclictest0-21swapper/000:30:280
8708997127,18cyclictest25267-21cut21:55:143
869999714,57cyclictest2422-21fschecks_time22:45:320
869999714,57cyclictest2422-21fschecks_time22:45:320
869999713,58cyclictest4502-21latency_hist21:30:140
869999701,48cyclictest27937-21fschecks_time23:55:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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