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2025-09-13 - 04:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 rack0slot6s.osadl.org (updated Sat Sep 13, 2025 00:45:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24480042247228,12sleep10-21swapper/119:06:271
24482022245225,12sleep80-21swapper/819:09:1518
24481242245223,15sleep40-21swapper/419:08:0914
24481362244224,13sleep160-21swapper/1619:08:238
24480342244223,13sleep70-21swapper/719:06:5317
24480962242221,13sleep190-21swapper/1919:07:4411
24481102238220,11sleep120-21swapper/1219:07:574
24480812238218,12sleep50-21swapper/519:07:3015
24479872238217,13sleep100-21swapper/1019:06:152
24482282236217,12sleep110-21swapper/1119:09:373
24481492234213,13sleep60-21swapper/619:08:3316
24480202234215,12sleep150-21swapper/1519:06:417
24480652233214,12sleep130-21swapper/1319:07:185
24481522232211,13sleep90-21swapper/919:08:3619
24480232232211,13sleep180-21swapper/1819:06:4410
24482382231212,12sleep00-21swapper/019:09:470
24480782229210,12sleep20-21swapper/219:07:2712
24480662228209,12sleep140-21swapper/1419:07:206
24480692226205,13sleep170-21swapper/1719:07:239
24480062224205,12sleep30-21swapper/319:06:2813
244863199390,0cyclictest0-21swapper/1000:29:122
244863199360,36cyclictest0-21swapper/1000:34:302
2448596993332,1cyclictest2370073-21kworker/0:4+pm20:02:590
2448631993232,0cyclictest0-21swapper/1000:08:072
2448596993232,0cyclictest2370073-21kworker/0:4+pm23:03:370
2448596993232,0cyclictest2370073-21kworker/0:4+pm22:49:330
2448596993232,0cyclictest2370073-21kworker/0:4+pm20:52:060
2448596993232,0cyclictest2370073-21kworker/0:4+pm20:17:470
2448596993231,1cyclictest2370073-21kworker/0:4+pm21:37:570
2448596993230,1cyclictest2370073-21kworker/0:4+pm21:33:370
2448596993131,0cyclictest2370073-21kworker/0:4+pm22:01:340
2448596993131,0cyclictest2370073-21kworker/0:4+pm21:15:410
2448596993131,0cyclictest2370073-21kworker/0:4+pm19:38:030
2448596993130,1cyclictest2370073-21kworker/0:4+pm22:36:520
2448596993128,1cyclictest2370073-21kworker/0:4+pm19:44:200
244863799300,20cyclictest2462017-21cut19:25:004
244862099300,27cyclictest0-21swapper/819:25:4918
244862099300,20cyclictest0-21swapper/819:52:2618
2448596993030,0cyclictest2370073-21kworker/0:4+pm23:24:020
2448596993030,0cyclictest2370073-21kworker/0:4+pm23:06:370
2448596993030,0cyclictest2370073-21kworker/0:4+pm22:44:410
2448596993030,0cyclictest2370073-21kworker/0:4+pm20:27:390
2448596993030,0cyclictest2370073-21kworker/0:4+pm20:22:520
2448596993030,0cyclictest2370073-21kworker/0:4+pm19:50:400
2448596993029,1cyclictest2370073-21kworker/0:4+pm23:36:270
2448596993029,1cyclictest2370073-21kworker/0:4+pm00:10:010
244864499290,0cyclictest0-21swapper/1519:55:007
244864299295,24cyclictest0-21swapper/1420:21:116
244863199290,0cyclictest0-21swapper/1023:56:322
2448620992919,5cyclictest0-21swapper/819:58:2218
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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