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2026-01-11 - 06:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Sun Jan 11, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1059429775,6sleep00-21swapper/019:06:540
1059429775,6sleep00-21swapper/019:06:540
1071729480,9sleep20-21swapper/219:08:292
1071729480,9sleep20-21swapper/219:08:292
874729372,15sleep10-21swapper/119:05:141
874729372,15sleep10-21swapper/119:05:141
1063428269,9sleep30-21swapper/319:07:253
1063428269,9sleep30-21swapper/319:07:243
1092899380,19cyclictest0-21swapper/319:30:143
1092899310,30cyclictest0-21swapper/300:05:143
1092899292,23cyclictest3730-21diskmemload21:34:143
1092899280,26cyclictest0-21swapper/323:00:193
1092899280,23cyclictest0-21swapper/321:40:193
1092899270,24cyclictest3730-21diskmemload23:28:303
10923992725,1cyclictest0-21swapper/123:40:191
1092899260,25cyclictest0-21swapper/322:59:143
1092899260,23cyclictest3730-21diskmemload21:48:553
1092899260,1cyclictest0-21swapper/322:07:213
10919992625,1cyclictest0-21swapper/022:06:430
1092899252,20cyclictest0-21swapper/323:45:123
1092899251,23cyclictest3730-21diskmemload00:27:253
1092899250,22cyclictest0-21swapper/322:55:013
1092899250,22cyclictest0-21swapper/322:55:013
1092899250,20cyclictest0-21swapper/322:25:143
1092899250,0cyclictest0-21swapper/321:57:043
1092899242,21cyclictest3730-21diskmemload23:55:183
1092899242,19cyclictest3730-21diskmemload23:34:093
1092899242,16cyclictest3730-21diskmemload00:00:393
1092899241,19cyclictest24584-21grep19:35:203
1092899240,23cyclictest0-21swapper/323:44:403
1092899240,21cyclictest0-21swapper/323:11:163
1092899240,20cyclictest0-21swapper/323:39:473
1092899232,20cyclictest3730-21diskmemload00:36:463
1092899232,18cyclictest3730-21diskmemload00:23:053
1092899231,21cyclictest3730-21diskmemload22:13:243
1092899231,21cyclictest3730-21diskmemload21:11:123
1092899231,18cyclictest0-21swapper/320:20:143
1092899230,22cyclictest3730-21diskmemload22:15:083
1092899230,21cyclictest3730-21diskmemload22:00:383
1092899230,1cyclictest0-21swapper/322:40:153
1092899230,1cyclictest0-21swapper/321:24:213
1092899230,1cyclictest0-21swapper/300:34:433
10925992321,1cyclictest10793-21apt-get00:05:142
1092399230,23cyclictest0-21swapper/122:49:521
1092399230,22cyclictest0-21swapper/122:41:551
10919992322,1cyclictest0-21swapper/022:16:240
1092899222,20cyclictest3730-21diskmemload21:53:463
1092899220,21cyclictest19294-21ssh00:10:103
1092899220,1cyclictest0-21swapper/323:22:053
1092899220,0cyclictest0-21swapper/300:16:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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