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2026-01-02 - 05:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 rack4slot1s.osadl.org (updated Fri Jan 02, 2026 00:44:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2480921400,3sleep00-21swapper/020:30:260
2480921400,3sleep00-21swapper/020:30:260
746821310,3sleep00-21swapper/000:00:470
746821310,3sleep00-21swapper/000:00:470
746821310,3sleep00-21swapper/000:00:470
3222021010,3sleep10-21swapper/123:40:421
3222021010,3sleep10-21swapper/123:40:421
25592860,2sleep0171ktimers/023:50:300
118322860,3sleep30-21swapper/322:45:443
118322860,3sleep30-21swapper/322:45:443
185532800,2sleep30-21swapper/320:10:433
185532800,2sleep30-21swapper/320:10:433
177062710,3sleep30-21swapper/323:03:013
312872690,3sleep20-21swapper/223:40:312
312872690,3sleep20-21swapper/223:40:312
318882680,1chrt31887-21sshd20:46:591
318882680,1chrt31887-21sshd20:46:591
281282670,3chrt0-21swapper/223:30:382
281282670,3chrt0-21swapper/223:30:382
231002670,2chrt0-21swapper/321:50:373
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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