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2026-08-21 - 08:08

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 Fri Aug 21, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1053329381,8sleep00-21swapper/019:06:370
1067728964,8sleep20-21swapper/219:08:292
1067128265,13sleep10-21swapper/119:08:231
1044928269,9sleep30-21swapper/319:05:323
1088599250,5cyclictest0-21swapper/221:40:132
1088599250,24cyclictest0-21swapper/200:14:392
1087999250,1cyclictest0-21swapper/022:40:180
10879992323,0cyclictest0-21swapper/021:55:500
10885992221,1cyclictest0-21swapper/222:47:582
1088299220,22cyclictest0-21swapper/122:57:011
1088299220,22cyclictest0-21swapper/121:55:251
10879992221,1cyclictest0-21swapper/023:38:380
10879992221,1cyclictest0-21swapper/000:35:350
10879992221,1cyclictest0-21swapper/000:04:590
1088599210,21cyclictest0-21swapper/221:36:382
1088599210,20cyclictest0-21swapper/223:55:302
10879992120,1cyclictest0-21swapper/022:48:510
1088599200,20cyclictest0-21swapper/223:03:412
10882992018,1cyclictest0-21swapper/119:30:111
1087999200,19cyclictest0-21swapper/000:33:490
1088999190,18cyclictest0-21swapper/323:03:403
1088299190,1cyclictest0-21swapper/123:20:251
10879991918,1cyclictest0-21swapper/022:26:020
10879991918,1cyclictest0-21swapper/021:35:250
10879991918,1cyclictest0-21swapper/000:19:290
1088999181,16cyclictest26892-21runrttasks22:20:583
1088599180,17cyclictest0-21swapper/223:34:302
10882991814,3cyclictest3405-21diskmemload21:35:581
1088299180,1cyclictest0-21swapper/121:20:341
1088299180,15cyclictest0-21swapper/100:00:481
1088999173,14cyclictest0-21swapper/322:45:063
1088999170,2cyclictest0-21swapper/323:38:473
1088999170,2cyclictest0-21swapper/321:24:283
1088299170,5cyclictest0-21swapper/123:44:341
10879991715,2cyclictest0-21swapper/023:41:450
1087999170,14cyclictest0-21swapper/021:40:130
10889991615,1cyclictest0-21swapper/322:30:253
10889991613,1cyclictest0-21swapper/323:05:453
1088999161,1cyclictest15307-21df_inode21:55:153
1088999160,7cyclictest0-21swapper/323:17:263
1088999160,15cyclictest0-21swapper/323:34:303
1088999160,13cyclictest0-21swapper/321:49:003
1088599165,7cyclictest14686-21apt-get21:55:132
10885991614,1cyclictest0-21swapper/200:18:162
1088599160,1cyclictest0-21swapper/200:33:332
1088299162,11cyclictest3405-21diskmemload21:51:161
1087999160,15cyclictest0-21swapper/000:14:080
1088999159,5cyclictest24755-21cron22:39:593
1088999150,2cyclictest0-21swapper/323:50:223
1088999150,13cyclictest0-21swapper/322:14:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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