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2026-04-07 - 02:03

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 50 highest latencies:
System rack0slot4s.osadl.org (updated Tue Apr 07, 2026 00:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39556002385378,5sleep70-21swapper/719:06:3913
39523352378370,5sleep90-21swapper/919:05:0615
39556692376318,13sleep120-21swapper/1219:07:174
39557712365328,12sleep60-21swapper/619:08:3112
39557172359316,14sleep150-21swapper/1519:07:527
39555972358319,31sleep50-21swapper/519:06:3711
39555392358338,13sleep20-21swapper/219:06:038
39557352355335,13sleep140-21swapper/1419:08:076
39556812355335,13sleep30-21swapper/319:07:249
39558172352333,12sleep100-21swapper/1019:09:082
39558662351332,12sleep10-21swapper/119:09:471
39558612351332,13sleep130-21swapper/1319:09:435
39557762349330,12sleep110-21swapper/1119:08:363
39555962349330,13sleep40-21swapper/419:06:3610
39557272346325,14sleep80-21swapper/819:08:0114
39556752346327,12sleep00-21swapper/019:07:210
395633999371,11cyclictest0-21swapper/1422:50:566
395633999371,11cyclictest0-21swapper/1422:17:586
395633999360,11cyclictest0-21swapper/1423:45:506
395633999360,11cyclictest0-21swapper/1423:34:526
395633999360,11cyclictest0-21swapper/1423:12:536
395633999360,11cyclictest0-21swapper/1422:06:596
395633999360,11cyclictest0-21swapper/1420:50:066
395633999360,11cyclictest0-21swapper/1420:39:076
395633999360,11cyclictest0-21swapper/1420:17:096
395633999360,11cyclictest0-21swapper/1419:33:136
395633999360,11cyclictest0-21swapper/1400:29:466
395633999350,10cyclictest0-21swapper/1422:39:566
395633999350,10cyclictest0-21swapper/1421:45:016
395633999350,10cyclictest0-21swapper/1421:01:056
395633999350,10cyclictest0-21swapper/1420:28:086
395631899350,34cyclictest0-21swapper/722:30:1613
3956339993429,1cyclictest1774-21snmpd21:53:256
395633999340,9cyclictest0-21swapper/1423:01:546
395633999340,34cyclictest0-21swapper/1420:06:116
3956320993412,0cyclictest0-21swapper/820:47:0414
395633999330,8cyclictest0-21swapper/1423:23:526
395633999330,8cyclictest0-21swapper/1419:44:126
395631899330,1cyclictest0-21swapper/720:15:1013
395629999330,29cyclictest0-21swapper/121:00:151
395632999320,29cyclictest0-21swapper/1100:15:143
3956327993216,0cyclictest3773435-21kworker/10:2+events19:10:072
3956327993216,0cyclictest3773435-21kworker/10:2+events19:10:072
3956318993229,3cyclictest1774-21snmpd23:06:2413
3956318993226,6cyclictest1774-21snmpd00:39:2313
395630999320,29cyclictest0-21swapper/423:55:1410
395630799320,1cyclictest0-21swapper/322:05:179
395630299320,29cyclictest0-21swapper/223:05:158
395634199310,30cyclictest0-21swapper/1519:52:537
395633999310,30cyclictest0-21swapper/1421:33:276
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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