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2026-06-23 - 06:32

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 Jun 23, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32391462386365,14sleep40-21swapper/419:09:5510
32390892381374,5sleep60-21swapper/619:09:0812
32390952370363,5sleep120-21swapper/1219:09:144
32389092360339,14sleep80-21swapper/819:07:1914
32388822357336,14sleep00-21swapper/019:06:550
32388762356316,13sleep110-21swapper/1119:06:493
32391022355316,14sleep10-21swapper/119:09:201
32389562351332,12sleep70-21swapper/719:07:5013
32356462350331,12sleep50-21swapper/519:05:0611
32388022349330,12sleep30-21swapper/319:05:539
32390412348329,12sleep100-21swapper/1019:08:412
32389642348328,13sleep130-21swapper/1319:07:555
32391442347328,12sleep20-21swapper/219:09:548
32389582347328,12sleep90-21swapper/919:07:5215
32388362345324,14sleep150-21swapper/1519:06:217
32387962343322,14sleep140-21swapper/1419:05:476
33138222720,0sleep140-21swapper/1420:35:166
323960299371,11cyclictest0-21swapper/1419:52:056
323960299360,11cyclictest0-21swapper/1419:30:076
323956799340,31cyclictest3531600-21sh23:36:138
323958899330,30cyclictest0-21swapper/921:26:5615
323957299330,32cyclictest0-21swapper/400:23:1510
323956799330,30cyclictest782-21systemd-journal19:31:298
323956799330,30cyclictest3401945-21ssh21:55:228
3239559993328,4cyclictest3458934-21mii-tool22:40:150
323955999330,33cyclictest3430320-21ssh22:19:070
323955999330,30cyclictest0-21swapper/023:30:160
323960299328,11cyclictest0-21swapper/1421:30:556
3239602993229,2cyclictest3237611-21kworker/u32:4+flush-259:019:20:176
3239599993225,1cyclictest0-21swapper/1323:35:155
323959999320,30cyclictest0-21swapper/1323:41:445
323959599320,29cyclictest0-21swapper/1219:30:154
3239588993229,3cyclictest3529612-21mii-tool23:35:1415
3239578993232,0cyclictest0-21swapper/623:08:2912
3239578993232,0cyclictest0-21swapper/600:02:4512
3239578993230,2cyclictest0-21swapper/622:20:1512
3239567993229,3cyclictest1774-21snmpd22:08:068
323956799320,32cyclictest0-21swapper/220:07:328
323956799320,29cyclictest0-21swapper/221:10:298
323956799320,29cyclictest0-21swapper/220:22:448
323956799320,29cyclictest0-21swapper/220:11:368
323956799320,29cyclictest0-21swapper/220:03:388
3239559993228,4cyclictest1774-21snmpd21:57:240
3239604993129,2cyclictest0-21swapper/1521:05:207
3239604993128,3cyclictest1774-21snmpd22:15:467
323960499310,31cyclictest0-21swapper/1522:47:537
323960499310,30cyclictest0-21swapper/1522:04:327
323960499310,30cyclictest0-21swapper/1519:27:027
3239599993128,3cyclictest1774-21snmpd21:42:485
3239599993128,3cyclictest1774-21snmpd21:42:475
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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