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2026-04-20 - 07:37

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 50 highest latencies:
System rack4slot1s.osadl.org (updated Mon Apr 20, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1856521440,2sleep20-21swapper/200:02:172
1856521440,2sleep20-21swapper/200:02:172
1856521440,2sleep20-21swapper/200:02:172
888121290,2sleep20-21swapper/222:07:252
888121290,2sleep20-21swapper/222:07:252
888121290,2sleep20-21swapper/222:07:252
3000921190,4sleep20-21swapper/223:07:102
3000921190,4sleep20-21swapper/223:07:102
234462990,2sleep0171ktimers/022:47:220
234462990,2sleep0171ktimers/022:47:220
248502980,2sleep00-21swapper/019:57:260
248502980,2sleep00-21swapper/019:57:260
282922910,2sleep20-21swapper/220:07:212
282922910,2sleep20-21swapper/220:07:212
63872900,1sleep00-21swapper/023:27:260
63872900,1sleep00-21swapper/023:27:260
196332820,2chrt18116-40mandb00:03:011
196332820,2chrt18116-40mandb00:03:011
196332820,2chrt18116-40mandb00:03:011
221442750,1sleep0171ktimers/021:17:220
221442750,1sleep0171ktimers/021:17:220
105742670,4chrt0-21swapper/323:41:563
105742670,4chrt0-21swapper/323:41:563
105742670,4chrt0-21swapper/323:41:563
105742670,4chrt0-21swapper/323:41:563
80272580,1sleep18029-21sed22:07:151
214382560,2sleep00-21swapper/022:42:200
214382560,2sleep00-21swapper/022:42:200
214382560,2sleep00-21swapper/022:42:200
57512500,3sleep10-21swapper/122:02:091
57512500,3sleep10-21swapper/122:02:091
321052500,3sleep20-21swapper/221:43:452
321052500,3sleep20-21swapper/221:43:452
321052500,3sleep20-21swapper/221:43:452
742599483,11cyclictest19536-21unixbench_singl00:02:290
742599483,11cyclictest19536-21unixbench_singl00:02:290
742599483,11cyclictest19536-21unixbench_singl00:02:290
82792440,1sleep08254-21unixbench_multi23:32:250
20672430,2chrt0-21swapper/023:17:170
20672430,2chrt0-21swapper/023:17:170
20672430,2chrt0-21swapper/023:17:170
14882430,2sleep30-21swapper/320:22:213
14882430,2sleep30-21swapper/320:22:213
75362420,4sleep30-21swapper/322:07:053
75362420,4sleep30-21swapper/322:07:053
75362420,4sleep30-21swapper/322:07:053
742599423,6cyclictest550-21cron22:41:020
742599423,6cyclictest550-21cron22:41:020
742599411,11cyclictest16767-21sed23:57:160
742599411,11cyclictest16767-21sed23:57:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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