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2026-08-25 - 10:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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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  Congatec
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 rackeslot8s.osadl.org (updated Tue Aug 25, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
129314121490,2sleep10-21swapper/122:50:201
976146993128,1cyclictest0-21swapper/322:10:003
13232042250,7sleep2441ktimers/223:10:192
976146992320,1cyclictest0-21swapper/320:55:153
976146992017,1cyclictest0-21swapper/321:55:273
97614699192,13cyclictest0-21swapper/323:30:153
976146991815,1cyclictest0-21swapper/323:42:473
976146991815,1cyclictest0-21swapper/322:20:183
976146991815,1cyclictest0-21swapper/322:16:473
976146991815,1cyclictest0-21swapper/319:30:163
97614699181,11cyclictest1377033-21taskset23:53:363
97614699172,11cyclictest990973-21turbostat19:20:013
976146991714,1cyclictest0-21swapper/323:35:253
976146991714,1cyclictest0-21swapper/323:15:163
976146991714,1cyclictest0-21swapper/323:05:233
976146991714,1cyclictest0-21swapper/322:55:003
976146991714,1cyclictest0-21swapper/322:25:263
976146991714,1cyclictest0-21swapper/321:50:133
976146991714,1cyclictest0-21swapper/321:16:353
976146991714,1cyclictest0-21swapper/320:05:283
976146991714,1cyclictest0-21swapper/300:10:003
97614699171,12cyclictest1085300-21taskset20:30:203
97614699171,11cyclictest1167221-21taskset21:30:203
97614699171,11cyclictest1016508-21turbostat19:39:593
97614699166,6cyclictest1302430-21taskset22:57:373
97614699162,11cyclictest0-21swapper/322:46:263
97614699162,11cyclictest0-21swapper/300:37:053
97614699162,10cyclictest1216732-21taskset22:03:183
97614699162,10cyclictest1216732-21taskset22:03:183
97614699162,10cyclictest1155025-21taskset21:25:073
976146991613,1cyclictest0-21swapper/323:55:113
976146991613,1cyclictest0-21swapper/321:47:083
976146991612,1cyclictest0-21swapper/322:40:143
97614699161,12cyclictest1385776-21taskset00:00:093
97614699161,11cyclictest1416968-21taskset00:21:363
97614699161,11cyclictest1416968-21taskset00:21:353
97614699161,11cyclictest1349408-21taskset23:28:083
97614699161,11cyclictest1341351-21taskset23:22:323
97614699161,11cyclictest1271624-21taskset22:38:513
97614699161,11cyclictest1176641-21taskset21:35:303
97614699161,11cyclictest1137606-21taskset21:10:593
97614699161,11cyclictest1069907-21taskset20:20:183
97614699161,10cyclictest1373912-21taskset23:45:263
97614699161,10cyclictest1256823-21chrt22:30:133
97614699161,10cyclictest1035480-21taskset19:53:593
11250572161,4sleep01125090-21apt-get21:05:120
97614699151,9cyclictest1418897-21taskset00:25:013
97614699151,9cyclictest1022552-21taskset19:41:043
976146991513,1cyclictest0-21swapper/323:10:183
976146991513,1cyclictest0-21swapper/321:40:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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