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2026-02-08 - 09:45
[ 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 100 highest latencies:
System rack3slot3s.osadl.org (updated Sun Feb 08, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
671139212551,69sleep30-21swapper/319:08:263
66629829059,10sleep20-21swapper/219:05:092
67116228253,20sleep10-21swapper/119:08:451
67116127556,14sleep00-21swapper/019:08:440
67138499271,20cyclictest676575-21taskset19:14:553
671384992623,1cyclictest0-21swapper/322:00:003
8210522251,17sleep1821203-21ntpq21:20:201
671384992420,2cyclictest0-21swapper/322:00:333
671384992420,2cyclictest0-21swapper/300:20:013
671384992419,3cyclictest0-21swapper/323:25:183
671384992419,2cyclictest0-21swapper/322:40:143
8233912231,10sleep0800234-21diskmemload21:22:350
671384992318,2cyclictest0-21swapper/320:45:003
8647822221,2sleep20-21swapper/221:47:192
67138499222,16cyclictest899791-21turbostat22:09:593
671384992219,1cyclictest0-21swapper/321:15:263
671384992218,2cyclictest0-21swapper/321:10:163
10532692221,16sleep11053782-21cut23:40:181
102065222211,2sleep2171rcu_preempt23:20:222
67138499219,8cyclictest930020-21taskset22:25:273
67138499219,8cyclictest1088753-21taskset00:02:113
67138499211,7cyclictest817112-21taskset21:20:123
671384992117,2cyclictest0-21swapper/323:50:093
671384992117,2cyclictest0-21swapper/300:25:163
67138499211,16cyclictest921534-21chrt22:20:333
67138499211,15cyclictest831950-21chrt21:27:533
67138499211,15cyclictest831950-21chrt21:27:533
67138499211,15cyclictest784762-21chrt20:55:103
67138499202,13cyclictest941672-21taskset22:35:133
67138499202,12cyclictest938271-21taskset22:30:273
671384992017,1cyclictest0-21swapper/319:20:003
671384992017,1cyclictest0-21swapper/300:10:143
671384992016,2cyclictest0-21swapper/300:30:263
67138499201,15cyclictest1047579-21taskset23:37:193
67138499201,15cyclictest0-21swapper/323:40:113
67138499201,13cyclictest0-21swapper/300:08:553
113864422010,6sleep11138658-21ssh00:32:101
67138499198,7cyclictest1007753-21taskset23:15:063
67138499194,12cyclictest67150irq/132-enp1s0-TxRx-323:21:413
67138499192,12cyclictest998971-21taskset23:09:333
671384991916,1cyclictest0-21swapper/322:55:133
671384991916,1cyclictest0-21swapper/320:20:143
671384991915,2cyclictest0-21swapper/322:50:113
671384991914,2cyclictest0-21swapper/323:58:323
67138499191,15cyclictest0-21swapper/322:12:213
67138499191,14cyclictest872487-21chrt21:51:183
67138499191,14cyclictest864596-21chrt21:47:023
67138499191,14cyclictest1038224-21chrt23:30:443
67138499191,14cyclictest0-21swapper/323:11:493
67138499191,14cyclictest0-21swapper/300:20:103
67138499191,13cyclictest0-21swapper/319:50:113
67138499191,12cyclictest834393-21taskset21:30:143
67138499191,11cyclictest913624-21chrt22:16:083
67138499190,2cyclictest0-21swapper/321:37:263
9054862181,3sleep10-21swapper/122:11:221
8002232181,5sleep0800229-21cron21:09:590
7240072181,4sleep1725113-21memory19:55:181
67138499185,9cyclictest689120-21sleep19:25:003
67138499185,9cyclictest689120-21sleep19:25:003
67138499183,12cyclictest0-21swapper/323:45:053
67138499182,12cyclictest855324-21taskset21:40:363
671384991815,2cyclictest0-21swapper/323:02:423
671384991814,2cyclictest0-21swapper/320:45:243
671384991813,3cyclictest0-21swapper/322:45:213
9901452171,3sleep20-21swapper/223:03:342
8812972171,3sleep00-21swapper/021:57:140
8655632171,4sleep1800234-21diskmemload21:48:261
8542972171,4sleep0800234-21diskmemload21:40:180
8492372171,4sleep2800234-21diskmemload21:38:532
67138499177,8cyclictest742073-21turbostat20:19:553
671384991714,1cyclictest0-21swapper/300:35:173
671384991713,2cyclictest0-21swapper/320:00:143
67138499171,12cyclictest0-21swapper/320:05:133
67138499171,10cyclictest710495-21taskset19:44:173
67138499170,14cyclictest0-21swapper/321:00:253
10884592170,7sleep20-21swapper/200:01:472
10640222171,4sleep1800234-21diskmemload23:47:271
10565982171,3sleep20-21swapper/223:43:272
9489252161,4sleep2800234-21diskmemload22:39:182
9481812161,2sleep10-21swapper/122:38:131
9380952161,3sleep20-21swapper/222:30:272
8573062160,3sleep20-21swapper/221:43:292
8367022162,7sleep1837744-21memory21:30:171
8320162161,2sleep10-21swapper/121:28:011
8320162161,2sleep10-21swapper/121:28:001
8228052161,3sleep20-21swapper/221:21:442
6904552161,10sleep1692190-21tr19:25:161
67138499163,6cyclictest721268-21taskset19:55:083
67138499161,9cyclictest694631-21chrt19:30:063
67138499161,12cyclictest0-21swapper/320:10:203
67138499160,13cyclictest0-21swapper/320:30:133
67138499160,13cyclictest0-21swapper/320:25:213
11461102161,10sleep01146120-21ssh00:36:050
10901362161,10sleep11090147-21ssh00:04:111
10887982161,9sleep0800234-21diskmemload00:02:180
10736222161,3sleep10-21swapper/123:54:331
9889102151,2sleep10-21swapper/123:01:371
9710302150,1sleep00-21swapper/022:50:220
9573162150,1sleep20-21swapper/222:44:182
9236392151,2sleep20-21swapper/222:23:422
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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