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2026-05-11 - 02:06

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 May 11, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
104642870,2sleep30-21swapper/320:57:373
104642870,2sleep30-21swapper/320:57:373
156392820,4sleep10-21swapper/100:02:471
156392820,4sleep10-21swapper/100:02:471
286612780,4sleep128662-21tail23:12:381
286612780,4sleep128662-21tail23:12:381
222672750,3sleep30-21swapper/300:22:353
222672750,3sleep30-21swapper/300:22:353
264122730,2sleep126410-21ps00:32:421
264122730,2sleep126410-21ps00:32:421
183682710,4sleep018371-21tr00:12:350
183682710,4sleep018371-21tr00:12:350
285622700,2sleep10-21swapper/100:37:451
285622700,2sleep10-21swapper/100:37:451
308822680,2chrt30752-21latency_hist20:27:270
308822680,2chrt30752-21latency_hist20:27:270
125062680,1sleep10-21swapper/123:57:331
125062680,1sleep10-21swapper/123:57:331
125062680,1sleep10-21swapper/123:57:331
303812580,2chrt0-21swapper/223:17:382
303812580,2chrt0-21swapper/223:17:382
110772560,2sleep30-21swapper/319:32:393
110772560,2sleep30-21swapper/319:32:393
112392540,3sleep20-21swapper/223:52:392
112392540,3sleep20-21swapper/223:52:392
39042530,3sleep30-21swapper/323:32:423
39042530,3sleep30-21swapper/323:32:423
165632520,3sleep30-21swapper/322:42:213
165632520,3sleep30-21swapper/322:42:213
159262520,11sleep1271rcuc/121:12:351
222122500,2sleep10-21swapper/122:57:231
222122500,2sleep10-21swapper/122:57:231
163582500,3sleep30-21swapper/319:47:353
163582500,3sleep30-21swapper/319:47:353
245932490,2sleep30-21swapper/320:07:453
245932490,2sleep30-21swapper/320:07:453
142152480,4sleep30-21swapper/300:02:253
142152480,4sleep30-21swapper/300:02:253
142152480,4sleep30-21swapper/300:02:253
3028994633,5cyclictest0-21swapper/000:02:260
3028994633,5cyclictest0-21swapper/000:02:260
3028994633,5cyclictest0-21swapper/000:02:260
190152460,3chrt0-21swapper/222:47:352
190152460,3chrt0-21swapper/222:47:352
222272450,4chrt0-21swapper/320:02:383
222272450,4chrt0-21swapper/320:02:383
222272450,4chrt0-21swapper/320:02:383
98892420,3chrt0-21swapper/222:22:392
98892420,3chrt0-21swapper/222:22:392
200282420,2sleep30-21swapper/319:57:363
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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