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2026-08-29 - 18:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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.
Unexpectedly long latencies may be caused by SMIs
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 rack0slot4s.osadl.org (updated Sat Aug 29, 2026 00:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39553042369362,5sleep140-21swapper/1419:07:086
39553042369362,5sleep140-21swapper/1419:07:086
39554202366329,14sleep100-21swapper/1019:08:412
39554202366329,14sleep100-21swapper/1019:08:412
39551932359334,7sleep00-21swapper/019:05:330
39551932359334,7sleep00-21swapper/019:05:330
39555062357318,31sleep20-21swapper/219:09:378
39555062357318,31sleep20-21swapper/219:09:378
39554672356336,13sleep150-21swapper/1519:09:187
39554672356336,13sleep150-21swapper/1519:09:187
39553802355337,12sleep120-21swapper/1219:08:104
39553802355337,12sleep120-21swapper/1219:08:104
39552352354334,13sleep50-21swapper/519:06:1111
39552352354334,13sleep50-21swapper/519:06:1111
39554532353336,11sleep60-21swapper/619:09:0912
39554532353336,11sleep60-21swapper/619:09:0912
39554172352331,14sleep70-21swapper/719:08:3813
39554172352331,14sleep70-21swapper/719:08:3813
39552012352332,13sleep80-21swapper/819:05:4214
39552012352332,13sleep80-21swapper/819:05:4214
39554712350329,14sleep10-21swapper/119:09:201
39554712350329,14sleep10-21swapper/119:09:201
39554042350330,13sleep130-21swapper/1319:08:285
39554042350330,13sleep130-21swapper/1319:08:285
39555372348328,13sleep40-21swapper/419:09:5510
39555372348328,13sleep40-21swapper/419:09:5510
39552502348328,13sleep30-21swapper/319:06:259
39552502348328,13sleep30-21swapper/319:06:259
39554362347328,12sleep90-21swapper/919:08:5615
39554362347328,12sleep90-21swapper/919:08:5615
39552042346325,14sleep110-21swapper/1119:05:453
39552042346325,14sleep110-21swapper/1119:05:453
3955955994241,1cyclictest4052739-21kworker/u32:0+events_unbound21:19:458
395595599396,31cyclictest101402-21kworker/u32:1+events_unbound00:19:008
395595599396,31cyclictest0-21swapper/221:32:508
395595599390,29cyclictest211rcu_preempt22:44:098
3955972993836,1cyclictest4189880-21kworker/u32:0+events_unbound23:05:2014
3955955993835,3cyclictest0-21swapper/200:38:568
3955955993835,2cyclictest4069558-21kworker/2:2-events21:25:098
395595599376,0cyclictest0-21swapper/223:46:148
395595599364,30cyclictest4062340-21ssh21:12:398
3955955993636,0cyclictest0-21swapper/223:10:458
3955955993635,1cyclictest0-21swapper/222:12:428
3955955993634,2cyclictest0-21swapper/222:31:338
3955955993631,2cyclictest211rcu_preempt22:37:438
395595599360,2cyclictest4192004-21kworker/2:1+events00:00:318
3955982993535,0cyclictest0-21swapper/1123:50:393
3955982993530,2cyclictest211rcu_preempt00:19:033
395595599355,0cyclictest0-21swapper/200:09:568
3955955993534,1cyclictest1769-21arpwatch23:51:178
3955955993533,0cyclictest0-21swapper/200:11:098
3955955993532,3cyclictest0-21swapper/223:19:038
3955955993532,3cyclictest0-21swapper/222:25:528
3955955993532,1cyclictest117774-21ssh00:26:028
395595599350,33cyclictest0-21swapper/220:05:238
3955982993434,0cyclictest0-21swapper/1100:39:563
3955969993434,0cyclictest0-21swapper/722:30:3513
3955969993434,0cyclictest0-21swapper/722:24:1413
3955969993434,0cyclictest0-21swapper/722:24:1313
3955969993434,0cyclictest0-21swapper/721:50:1513
3955969993434,0cyclictest0-21swapper/700:38:5513
3955969993434,0cyclictest0-21swapper/700:15:5913
395595599345,29cyclictest0-21swapper/223:27:458
395595599344,30cyclictest0-21swapper/200:32:038
395595599344,29cyclictest0-21swapper/220:25:158
3955955993434,0cyclictest0-21swapper/219:25:158
3955955993433,1cyclictest4192004-21kworker/2:1-events00:20:278
3955955993433,1cyclictest0-21swapper/223:01:588
3955955993433,0cyclictest0-21swapper/220:35:118
3955955993432,2cyclictest0-21swapper/223:24:298
3955955993432,2cyclictest0-21swapper/222:53:598
3955955993432,2cyclictest0-21swapper/221:55:338
3955955993432,2cyclictest0-21swapper/221:00:128
3955955993432,2cyclictest0-21swapper/219:35:178
3955955993431,3cyclictest996599-21chrome21:20:158
3955955993431,3cyclictest0-21swapper/223:37:028
3955955993431,2cyclictest0-21swapper/223:33:018
3955955993431,0cyclictest0-21swapper/222:00:158
395595599340,30cyclictest0-21swapper/222:47:578
395595199340,1cyclictest0-21swapper/120:00:141
3955982993333,0cyclictest0-21swapper/1123:17:363
3955982993333,0cyclictest0-21swapper/1121:19:153
3955969993333,0cyclictest0-21swapper/722:45:5513
3955969993333,0cyclictest0-21swapper/722:25:1113
3955969993333,0cyclictest0-21swapper/720:45:1713
3955969993333,0cyclictest0-21swapper/719:15:2313
3955969993333,0cyclictest0-21swapper/719:15:2313
3955969993333,0cyclictest0-21swapper/700:02:3513
3955955993333,0cyclictest0-21swapper/222:58:258
3955955993333,0cyclictest0-21swapper/221:37:018
3955955993332,0cyclictest0-21swapper/221:51:508
3955955993331,0cyclictest0-21swapper/219:45:158
3955955993330,1cyclictest4032103-21kworker/u32:2+events_unbound22:20:418
3955955993330,1cyclictest4032103-21kworker/u32:2+events_unbound22:20:418
3955955993329,3cyclictest4076444-21kworker/2:0-events21:45:098
3955955993328,3cyclictest3920561-21kworker/2:1+mm_percpu_wq20:00:218
395595599331,2cyclictest421ktimers/219:30:158
395595599330,31cyclictest411rcuc/223:40:038
395595599330,31cyclictest0-21swapper/221:42:258
395595599330,31cyclictest0-21swapper/219:12:058
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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