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2026-01-28 - 20:33
[ 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 Wed Jan 28, 2026 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3350477212154,62sleep30-21swapper/307:08:543
33502302107100,4sleep10-21swapper/107:05:481
335035928756,9sleep20-21swapper/207:07:252
335024528253,6sleep00-21swapper/007:05:590
3350686993430,2cyclictest0-21swapper/312:25:253
3350686993424,7cyclictest15850irq/127-ahci[0000:00:17.0]12:00:143
37721542310,3sleep0221rcuc/012:00:190
335068699271,20cyclictest3355186-21taskset07:10:233
3350686992622,2cyclictest0-21swapper/309:50:013
3350686992621,3cyclictest0-21swapper/309:35:003
3350686992421,1cyclictest0-21swapper/312:20:013
3350686992321,1cyclictest0-21swapper/312:30:203
3350686992320,1cyclictest0-21swapper/311:55:003
3350686992320,1cyclictest0-21swapper/310:31:263
3350686992320,1cyclictest0-21swapper/309:40:123
3350686992319,2cyclictest0-21swapper/311:35:153
3350686992315,4cyclictest36707232sleep311:00:193
335068699231,18cyclictest3578983-21chrt10:06:543
335068699230,18cyclictest3631256-21chrt10:38:203
335068699222,14cyclictest3565304-21taskset10:00:173
3350686992220,1cyclictest0-21swapper/310:15:013
3350686992218,2cyclictest0-21swapper/311:45:133
3350686992217,2cyclictest0-21swapper/309:20:013
3350686992216,3cyclictest0-21swapper/310:40:163
335068699221,17cyclictest3827207-21taskset12:35:073
335068699221,16cyclictest3479730-21turbostat09:10:003
38251242211,2sleep20-21swapper/212:32:332
335068699217,10cyclictest3658778-21chrt10:55:123
335068699212,12cyclictest3480037-21taskset09:10:053
335068699211,9cyclictest3409857-21taskset08:00:173
335068699211,8cyclictest3527851-21taskset09:36:043
3350686992118,1cyclictest0-21swapper/308:45:123
335068699211,3cyclictest3427159-21turbostat08:20:003
335068699211,3cyclictest0-21swapper/311:56:523
335068699211,16cyclictest3809719-21chrt12:24:443
335068699210,18cyclictest0-21swapper/311:20:123
335068699209,7cyclictest3691617-21turbostat11:15:013
335068699202,12cyclictest3513184-21taskset09:29:353
3350686992017,1cyclictest0-21swapper/311:35:013
335068699201,14cyclictest3788044-21chrt12:10:173
335068699201,14cyclictest3682528-21chrt11:09:113
335068699199,7cyclictest3697791-21taskset11:16:453
3350686991916,1cyclictest0-21swapper/307:35:303
3350686991912,4cyclictest67150irq/132-enp1s0-TxRx-307:20:223
3350686991911,4cyclictest36569042sleep310:53:383
335068699191,14cyclictest0-21swapper/311:43:373
335068699191,14cyclictest0-21swapper/310:45:183
335068699191,14cyclictest0-21swapper/310:28:463
335068699191,13cyclictest3463934-21turbostat08:54:593
335068699190,17cyclictest67150irq/132-enp1s0-TxRx-309:50:483
37074002180,2sleep10-21swapper/111:23:411
36470202181,11sleep23479724-21diskmemload10:46:382
335068699188,8cyclictest3384503-21turbostat07:44:563
335068699187,8cyclictest3368596-21turbostat07:29:553
335068699184,12cyclictest67150irq/132-enp1s0-TxRx-310:21:313
335068699182,12cyclictest3781787-21taskset12:06:053
335068699181,14cyclictest67150irq/132-enp1s0-TxRx-310:15:373
335068699181,14cyclictest0-21swapper/309:22:283
3350686991811,3cyclictest0-21swapper/308:40:193
335068699181,12cyclictest3561318-21taskset09:55:363
335068699180,15cyclictest0-21swapper/311:25:183
36834982171,7sleep13683527-21/usr/sbin/munin11:10:101
36152092171,3sleep20-21swapper/210:29:232
35888602171,4sleep23479724-21diskmemload10:13:282
35194562171,3sleep00-21swapper/009:31:250
335068699171,4cyclictest0-21swapper/308:10:123
3350686991714,1cyclictest0-21swapper/307:55:113
36996222161,9sleep23479724-21diskmemload11:19:332
36987452161,4sleep03479724-21diskmemload11:18:160
36987212161,2sleep10-21swapper/111:18:131
36632782161,2sleep00-21swapper/010:55:430
335068699161,9cyclictest3437936-21taskset08:30:063
3350686991613,1cyclictest0-21swapper/308:25:153
3350686991611,3cyclictest0-21swapper/308:55:183
335068699161,10cyclictest3474134-21taskset09:00:353
335068699160,13cyclictest0-21swapper/308:35:113
335068699160,13cyclictest0-21swapper/308:25:013
38350632151,9sleep03479724-21diskmemload12:39:410
38336862150,10sleep13479724-21diskmemload12:37:421
38097452151,2sleep10-21swapper/112:24:471
37236172151,8sleep23479724-21diskmemload11:32:412
36809192151,10sleep23680930-21sh11:06:552
36583552151,8sleep13658568-21diskstats10:55:111
35284492150,1sleep20-21swapper/209:36:562
34839902158,4sleep23480095-21/usr/sbin/munin09:10:172
34542302151,9sleep03454471-21cut08:45:150
34080412151,9sleep23409852-21kthreadcore08:00:172
335068699159,4cyclictest0-21swapper/308:05:103
335068699151,9cyclictest3363110-21taskset07:18:273
335068699151,8cyclictest3395568-21taskset07:50:073
38180162141,8sleep03479724-21diskmemload12:29:280
37845532141,4sleep23784567-21ssh12:09:572
37741362141,9sleep23774150-21ssh12:02:192
37672872141,3sleep13767299-21ssh11:59:381
37571802141,2sleep00-21swapper/011:52:150
37324332141,9sleep23732443-21ssh11:37:422
37157132140,3sleep03479724-21diskmemload11:28:300
36820552141,3sleep03479724-21diskmemload11:08:340
36060412140,2sleep03479724-21diskmemload10:23:480
36049512141,3sleep13479724-21diskmemload10:22:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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