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2026-01-26 - 01:46
[ 290.152] (II) VESA: driver for VESA chipsets: vesa

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #3

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 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 rack3slot3s.osadl.org (updated Mon Jan 26, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3680665213245,82sleep30-21swapper/319:07:003
368075129362,6sleep00-21swapper/019:08:060
368064328654,9sleep10-21swapper/119:06:421
368059228453,10sleep20-21swapper/219:06:062
3681014992925,2cyclictest0-21swapper/300:00:263
3681014992925,2cyclictest0-21swapper/300:00:263
40749812263,16sleep02831240-21snmpd23:44:310
3681014992420,2cyclictest0-21swapper/322:00:003
368101499231,18cyclictest4030976-21taskset23:18:033
368101499231,18cyclictest3919333-21taskset22:11:373
368101499229,9cyclictest3990015-21taskset22:55:023
368101499222,13cyclictest4089250-21taskset23:50:463
3681014992218,2cyclictest0-21swapper/323:40:173
3681014992217,2cyclictest0-21swapper/300:05:223
3681014992217,2cyclictest0-21swapper/300:05:223
368101499220,15cyclictest3851329-21taskset21:32:053
368101499214,14cyclictest67150irq/132-enp1s0-TxRx-322:05:183
368101499214,14cyclictest67150irq/132-enp1s0-TxRx-322:05:173
368101499212,13cyclictest4056200-21taskset23:32:093
3681014992118,1cyclictest0-21swapper/323:10:223
3681014992117,2cyclictest0-21swapper/322:49:563
3681014992117,1cyclictest0-21swapper/320:40:243
368101499211,3cyclictest0-21swapper/322:23:163
368101499210,17cyclictest4158153-21taskset00:31:073
40979102200,2sleep20-21swapper/223:55:502
38321222200,3sleep13832179-21ntpq21:20:201
368101499202,13cyclictest3773372-21turbostat20:35:013
3681014992017,1cyclictest0-21swapper/322:40:143
3681014992017,1cyclictest0-21swapper/321:16:143
3681014992017,1cyclictest0-21swapper/320:20:143
3681014992016,2cyclictest0-21swapper/321:20:183
3681014992011,7cyclictest0-21swapper/300:25:163
368101499201,14cyclictest3810661-21sleep21:10:003
368101499201,14cyclictest3810661-21sleep21:09:593
41595712191,4sleep03810643-21diskmemload00:33:170
37934942192,5sleep13793532-21ntpq20:50:191
368101499194,12cyclictest0-21swapper/322:25:393
368101499192,12cyclictest3885680-21taskset21:52:083
368101499192,11cyclictest3773624-21taskset20:35:133
3681014991917,1cyclictest0-21swapper/319:35:163
3681014991917,1cyclictest0-21swapper/300:20:223
3681014991916,1cyclictest0-21swapper/321:35:233
3681014991916,1cyclictest0-21swapper/321:00:253
3681014991916,1cyclictest0-21swapper/319:25:013
3681014991916,1cyclictest0-21swapper/300:40:003
3681014991915,2cyclictest0-21swapper/320:45:113
3681014991914,3cyclictest0-21swapper/323:45:513
3681014991914,2cyclictest0-21swapper/320:20:013
3681014991913,1cyclictest0-21swapper/321:25:153
368101499191,15cyclictest0-21swapper/323:27:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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