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2026-06-24 - 13:00

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Wed Jun 24, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3117721340,2sleep10-21swapper/122:38:171
3117721340,2sleep10-21swapper/122:38:171
3117721340,2sleep10-21swapper/122:38:171
726121260,8sleep1281ktimers/121:33:251
726121260,8sleep1281ktimers/121:33:251
488221060,2sleep04884-21latency21:28:180
1788721020,3chrt0-21swapper/323:28:243
1788721020,3chrt0-21swapper/323:28:243
129692810,4chrt12971-21grep20:23:261
129692810,4chrt12971-21grep20:23:261
123322810,3sleep30-21swapper/300:42:463
123322810,3sleep30-21swapper/300:42:463
219792790,3chrt21981-21fschecks_count20:48:151
75212760,3sleep30-21swapper/321:33:273
75212760,3sleep30-21swapper/321:33:273
254812710,3chrt0-21swapper/323:48:263
268012670,3sleep30-21swapper/319:33:193
268012670,3sleep30-21swapper/319:33:193
268012670,3sleep30-21swapper/319:33:193
4362620,3chrt0-21swapper/321:18:083
4362620,3chrt0-21swapper/321:18:083
176112590,3sleep30-21swapper/322:03:143
176112590,3sleep30-21swapper/322:03:143
176112590,3sleep30-21swapper/322:03:143
241812580,3sleep20-21swapper/220:53:182
241812580,3sleep20-21swapper/220:53:182
48692560,3sleep10-21swapper/100:23:021
48692560,3sleep10-21swapper/100:23:021
48692560,3sleep10-21swapper/100:23:021
228212560,3sleep20-21swapper/220:48:242
228212560,3sleep20-21swapper/220:48:242
228212560,3sleep20-21swapper/220:48:242
228212560,3sleep20-21swapper/220:48:242
116792560,3chrt0-21swapper/321:48:023
116792560,3chrt0-21swapper/321:48:023
116792560,3chrt0-21swapper/321:48:023
313142540,3sleep20-21swapper/200:03:332
313142540,3sleep20-21swapper/200:03:332
313142540,3sleep20-21swapper/200:03:332
130342520,3chrt0-21swapper/220:23:272
130342520,3chrt0-21swapper/220:23:272
48282490,2sleep04868-21tr00:23:020
48282490,2sleep04868-21tr00:23:020
48282490,2sleep04868-21tr00:23:020
18915994835,7cyclictest0-21swapper/000:03:090
18915994835,7cyclictest0-21swapper/000:03:090
284942460,2chrt0-21swapper/319:38:183
284942460,2chrt0-21swapper/319:38:183
184892460,5sleep018663-21grep22:03:240
184892460,5sleep018663-21grep22:03:240
104942450,3chrt0-21swapper/123:08:241
104942450,3chrt0-21swapper/123:08:241
325562440,3chrt0-21swapper/222:43:132
325562440,3chrt0-21swapper/222:43:132
325562440,3chrt0-21swapper/222:43:132
36872430,3sleep3431rcuc/300:18:173
36872430,3sleep3431rcuc/300:18:173
36872430,3sleep3431rcuc/300:18:173
278652420,3sleep30-21swapper/322:28:273
278652420,3sleep30-21swapper/322:28:273
159492410,3sleep20-21swapper/221:58:192
159492410,3sleep20-21swapper/221:58:192
159492410,3sleep20-21swapper/221:58:192
88242400,3chrt0-21swapper/223:03:272
88242400,3chrt0-21swapper/223:03:272
57992390,4sleep00-21swapper/020:03:310
57992390,4sleep00-21swapper/020:03:310
1891799391,31cyclictest29924-21taskset00:03:092
1891799391,31cyclictest29924-21taskset00:03:092
18915993928,9cyclictest2281-21sendmail21:23:010
18915993928,9cyclictest2281-21sendmail21:23:010
18915993928,9cyclictest2281-21sendmail21:23:010
18915993629,5cyclictest9932-21unixbench_singl20:13:250
18915993629,5cyclictest9932-21unixbench_singl20:13:250
186612360,3sleep20-21swapper/223:33:062
186612360,3sleep20-21swapper/223:33:062
285412340,3sleep30-21swapper/321:03:243
285412340,3sleep30-21swapper/321:03:243
76502330,2sleep07736-21switchtime20:08:230
76502330,2sleep07736-21switchtime20:08:230
34002330,2chrt0-21swapper/219:58:152
34002330,2chrt0-21swapper/219:58:152
18916993326,5cyclictest572-21cups-browsed23:13:251
18916993326,5cyclictest572-21cups-browsed23:13:251
18916993326,5cyclictest572-21cups-browsed23:13:251
18915993327,4cyclictest17792-21gltestperf22:03:150
18915993327,4cyclictest17792-21gltestperf22:03:150
158032330,2sleep20-21swapper/223:23:212
158032330,2sleep20-21swapper/223:23:212
158032330,2sleep20-21swapper/223:23:212
219312320,3sleep20-21swapper/223:38:242
219312320,3sleep20-21swapper/223:38:242
219312320,3sleep20-21swapper/223:38:242
20472320,2sleep30-21swapper/300:13:193
20472320,2sleep30-21swapper/300:13:193
18916993227,3cyclictest30372-21sed00:03:171
18916993227,3cyclictest30372-21sed00:03:171
18916993227,3cyclictest30372-21sed00:03:171
18916993227,3cyclictest25240-21switchtime19:28:241
18916993227,3cyclictest25240-21switchtime19:28:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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