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2025-12-24 - 01:50

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 Wed Dec 24, 2025 00:44:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1093321000,2sleep30-21swapper/323:15:333
1093321000,2sleep30-21swapper/323:15:333
94272970,6sleep00-21swapper/021:45:290
94272970,6sleep00-21swapper/021:45:290
323712880,3sleep30-21swapper/300:15:193
323712880,3sleep30-21swapper/300:15:193
79312820,1sleep3431rcuc/321:40:333
79312820,1sleep3431rcuc/321:40:333
187222800,3sleep30-21swapper/323:35:353
187222800,3sleep30-21swapper/323:35:353
238372790,3chrt0-21swapper/323:50:313
238372790,3chrt0-21swapper/323:50:313
22982670,4sleep30-21swapper/322:55:113
22982670,4sleep30-21swapper/322:55:113
64612630,2chrt0-21swapper/300:30:313
64612630,2chrt0-21swapper/300:30:313
206542620,3sleep30-21swapper/322:15:313
206542620,3sleep30-21swapper/322:15:313
206542620,3sleep30-21swapper/322:15:313
310852610,1sleep00-21swapper/019:50:310
282742540,3sleep30-21swapper/322:35:333
282742540,3sleep30-21swapper/322:35:333
76212440,3sleep30-21swapper/300:35:213
76212440,3sleep30-21swapper/300:35:213
76212440,3sleep30-21swapper/300:35:213
6292430,3sleep30-21swapper/300:15:273
6292430,3sleep30-21swapper/300:15:273
131532430,1sleep00-21swapper/021:55:300
131532430,1sleep00-21swapper/021:55:300
211932420,3sleep30-21swapper/319:25:263
211932420,3sleep30-21swapper/319:25:263
15443994135,4cyclictest547-21rs:main0
15443994135,4cyclictest547-21rs:main0
15443994135,4cyclictest547-21rs:main0
294112390,3sleep00-21swapper/000:05:310
294112390,3sleep00-21swapper/000:05:310
239702370,2sleep00-21swapper/022:25:260
239702370,2sleep00-21swapper/022:25:260
24332360,1sleep00-21swapper/000:20:270
24332360,1sleep00-21swapper/000:20:270
15444993632,3cyclictest14087-21latency_hist22:00:111
15444993632,3cyclictest14087-21latency_hist22:00:111
273992350,2sleep127502-21df22:35:241
273992350,2sleep127502-21df22:35:241
15443993530,4cyclictest572-21cups-browsed19:45:370
15443993530,4cyclictest572-21cups-browsed19:45:370
137462350,3sleep30-21swapper/320:30:303
137462350,3sleep30-21swapper/320:30:303
27312340,2chrt2729-21fschecks_time22:55:240
27312340,2chrt2729-21fschecks_time22:55:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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