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2026-02-27 - 16:20
[ 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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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 100 highest latencies:
System rack3slot3s.osadl.org (updated Fri Feb 27, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1812897211761,52sleep30-21swapper/307:07:163
225179721050,2sleep30-21swapper/311:58:593
226924221000,2sleep00-21swapper/012:08:130
181301028555,12sleep10-21swapper/107:08:381
181284428455,10sleep20-21swapper/207:06:352
181242327752,13sleep00-21swapper/007:05:240
1813239992825,1cyclictest0-21swapper/311:50:003
1813239992824,2cyclictest0-21swapper/310:20:013
181323999249,13cyclictest0-21swapper/308:40:153
181323999249,12cyclictest0-21swapper/311:36:393
1813239992422,1cyclictest0-21swapper/311:20:433
1813239992415,5cyclictest19451132sleep309:10:163
181323999238,12cyclictest0-21swapper/312:08:503
1813239992321,1cyclictest0-21swapper/311:11:053
1813239992320,2cyclictest0-21swapper/309:31:573
1813239992320,1cyclictest0-21swapper/310:25:203
19334192222,14sleep21933448-21munin-run09:00:012
181323999225,4cyclictest21066632sleep310:38:273
181323999222,16cyclictest0-21swapper/312:31:543
1813239992219,1cyclictest0-21swapper/307:30:003
181323999221,3cyclictest0-21swapper/312:01:043
181323999221,17cyclictest2204444-21taskset11:31:173
1813239992119,1cyclictest0-21swapper/312:27:483
1813239992119,1cyclictest0-21swapper/310:02:003
1813239992119,1cyclictest0-21swapper/309:58:343
1813239992119,1cyclictest0-21swapper/307:35:313
1813239992118,1cyclictest0-21swapper/312:10:213
1813239992118,1cyclictest0-21swapper/309:36:113
1813239992118,1cyclictest0-21swapper/309:22:323
1813239992118,1cyclictest0-21swapper/309:22:323
181323999211,17cyclictest0-21swapper/310:30:013
22961212201,8sleep12296132-21ssh12:22:271
181323999206,2cyclictest0-21swapper/310:51:433
181323999206,2cyclictest0-21swapper/310:51:423
181323999204,13cyclictest0-21swapper/309:48:123
1813239992018,1cyclictest0-21swapper/311:01:013
1813239992018,1cyclictest0-21swapper/309:51:563
1813239992018,1cyclictest0-21swapper/307:30:193
1813239992017,1cyclictest0-21swapper/307:45:193
1813239992017,1cyclictest0-21swapper/307:18:113
1813239992017,1cyclictest0-21swapper/307:18:113
1813239992016,2cyclictest0-21swapper/311:30:003
1813239992016,2cyclictest0-21swapper/311:16:003
1813239992016,2cyclictest0-21swapper/310:41:213
20703812192,10sleep072-21kcompactd010:18:270
181323999195,2cyclictest0-21swapper/310:23:323
1813239991917,1cyclictest0-21swapper/310:14:573
1813239991916,2cyclictest0-21swapper/307:20:203
1813239991916,1cyclictest0-21swapper/312:18:043
1813239991916,1cyclictest0-21swapper/310:08:123
1813239991916,1cyclictest0-21swapper/309:40:213
1813239991916,1cyclictest0-21swapper/309:17:483
1813239991915,2cyclictest0-21swapper/311:40:013
181323999191,15cyclictest2124177-21taskset10:47:403
181323999191,15cyclictest0-21swapper/310:56:033
181323999191,15cyclictest0-21swapper/309:26:553
181323999191,14cyclictest0-21swapper/312:36:153
1813239991911,4cyclictest0-21swapper/312:20:063
20873072181,8sleep12087322-21ssh10:26:581
1813239991816,1cyclictest0-21swapper/308:50:203
1813239991815,1cyclictest0-21swapper/309:03:573
1813239991811,4cyclictest0-21swapper/311:05:193
181323999180,15cyclictest0-21swapper/311:53:543
181323999180,15cyclictest0-21swapper/311:53:543
22585952171,12sleep22258608-21ssh12:01:112
18640662170,2sleep21864309-21expr07:55:122
1813239991715,1cyclictest0-21swapper/308:55:133
1813239991715,1cyclictest0-21swapper/308:35:173
1813239991715,1cyclictest0-21swapper/308:05:183
1813239991714,1cyclictest0-21swapper/308:20:203
1813239991714,1cyclictest0-21swapper/307:55:223
1813239991714,1cyclictest0-21swapper/307:40:203
1813239991713,2cyclictest0-21swapper/308:28:483
1813239991711,4cyclictest0-21swapper/308:30:113
22685692161,3sleep20-21swapper/212:07:252
22312952160,1sleep20-21swapper/211:46:002
22124172161,5sleep02212434-21readlink11:35:240
20520202160,1sleep20-21swapper/210:08:102
1813239991614,1cyclictest0-21swapper/308:15:143
1813239991614,1cyclictest0-21swapper/307:10:183
1813239991614,1cyclictest0-21swapper/307:10:183
1813239991613,1cyclictest0-21swapper/308:10:323
1813239991613,1cyclictest0-21swapper/307:50:123
1813239991612,2cyclictest0-21swapper/308:48:033
1813239991611,3cyclictest0-21swapper/309:05:103
181323999160,13cyclictest0-21swapper/308:00:153
22335482151,9sleep11944161-21diskmemload11:48:481
22155612150,3sleep20-21swapper/211:38:502
21675822151,9sleep01944161-21diskmemload11:10:300
21336382151,8sleep11944161-21diskmemload10:53:121
21336382151,8sleep11944161-21diskmemload10:53:121
20167652151,8sleep21944161-21diskmemload09:49:592
19783052151,8sleep11944161-21diskmemload09:27:211
18696632151,3sleep01869682-21apt-get08:00:110
23157002141,9sleep02315715-21ssh12:34:190
22419942141,7sleep11944161-21diskmemload11:53:051
22419942141,7sleep11944161-21diskmemload11:53:041
22412292141,8sleep01944161-21diskmemload11:52:070
22412292141,8sleep01944161-21diskmemload11:52:070
21949362141,7sleep01944161-21diskmemload11:25:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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