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2026-08-07 - 06:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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.
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 rackfslot7s.osadl.org (updated Fri Aug 07, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
76923499433714,4317cyclictest833653-21kworker/3:0+events22:30:153
76923299312413,3108cyclictest825837-21kworker/2:2+events22:10:012
76923499307814,3060cyclictest830366-21kworker/3:0+events22:20:183
76922799304914,3029cyclictest864463-21kworker/1:2+events00:30:131
7692329930187,3007cyclictest798691-21kworker/2:2+events20:45:132
76923499300311,2988cyclictest806766-21kworker/3:0+events21:10:183
76923299297714,2957cyclictest819224-21kworker/2:1+events21:45:202
76923299297612,2955cyclictest841867-21kworker/2:1+events23:00:132
76923299296713,2949cyclictest865787-21kworker/2:2+events00:25:222
76923299291014,2892cyclictest785156-21kworker/2:0+events20:00:182
76923299283814,2819cyclictest841867-21kworker/2:1+events00:00:172
76922399283514,2818cyclictest819180-21kworker/0:0+events21:50:400
76923499280913,2792cyclictest785092-21kworker/3:0+events19:57:383
76922799280513,2788cyclictest777319-21kworker/1:0+events19:34:361
76923499280413,2787cyclictest772475-21kworker/3:1+events19:42:113
76923499280412,2788cyclictest819102-21kworker/3:0+events21:41:583
76922799280313,2786cyclictest795156-21kworker/1:1+events20:53:121
76922799280013,2783cyclictest788299-21kworker/1:1+events20:18:131
76923499279613,2779cyclictest832019-21kworker/3:1+events22:29:293
76923299279612,2780cyclictest793284-21kworker/2:2+events20:30:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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