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2026-01-02 - 14:03

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 Jan 02, 2026 00:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1679021440,4sleep10-21swapper/119:05:411
1029821040,2sleep110299-21mkdir20:16:081
1766799874,58cyclictest0-21swapper/019:10:140
1766799761,49cyclictest0-21swapper/023:40:230
227292740,6sleep21766999cyclictest20:50:342
1766799686,38cyclictest0-21swapper/022:50:420
1766799674,45cyclictest0-21swapper/023:35:260
61542660,2sleep36146-21munin-run00:35:123
17667996544,10cyclictest0-21swapper/000:35:430
1766799651,51cyclictest26827-21unixbench_singl21:00:440
1766799642,39cyclictest128-21systemd-journal00:05:120
1766799641,48cyclictest7082-21grep21:35:420
1766799641,48cyclictest10208-21unixbench_singl20:15:420
1766799633,45cyclictest0-21swapper/021:00:120
1766799632,58cyclictest9823-21cut23:15:270
1766799632,49cyclictest8811-21cron20:15:110
259532620,2sleep125954-21grep22:30:281
1766799621,49cyclictest29200-21idleruntime-cro22:40:120
1766799621,42cyclictest0-21swapper/023:30:250
17667996143,6cyclictest29857-21unixbench_multi19:40:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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