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2026-06-14 - 18:30

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 Sun Jun 14, 2026 12:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31482790,2chrt3149-21grep12:38:160
31482790,2chrt3149-21grep12:38:160
31482790,2chrt3149-21grep12:38:160
154312710,2sleep20-21swapper/211:47:532
154312710,2sleep20-21swapper/211:47:532
154312710,2sleep20-21swapper/211:47:532
273702620,2sleep027480-21df10:53:040
273702620,2sleep027480-21df10:53:040
273702620,2sleep027480-21df10:53:040
166482590,2chrt0-21swapper/008:58:020
166482590,2chrt0-21swapper/008:58:020
141462570,2chrt14135-21awk10:17:540
231352560,2sleep00-21swapper/007:48:070
231352560,2sleep00-21swapper/007:48:070
231352560,2sleep00-21swapper/007:48:070
56622550,7sleep0171ktimers/008:28:070
56622550,7sleep0171ktimers/008:28:070
56622550,7sleep0171ktimers/008:28:070
215162540,2sleep021619-21missed_timers07:43:090
215162540,2sleep021619-21missed_timers07:43:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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