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2026-02-04 - 09:04
[ 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 Feb 04, 2026 00:43:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12671922100,2sleep1126717-21turbostat00:00:011
3907546212061,54sleep30-21swapper/319:09:473
39072272114106,5sleep20-21swapper/219:05:452
390749128553,9sleep10-21swapper/119:09:051
390728528152,6sleep00-21swapper/019:06:270
390769199271,22cyclictest50118-21chrt23:12:233
733742261,17sleep073439-21ntpq23:25:200
390769199251,19cyclictest16156-21taskset22:51:113
505282231,3sleep20-21swapper/223:13:002
390769199231,17cyclictest4087806-21chrt21:40:123
3907691992311,7cyclictest1851602chrt00:35:143
390769199230,20cyclictest24472-21chrt22:56:133
390769199228,6cyclictest3912629-21taskset19:11:493
390769199222,13cyclictest58219-21taskset23:16:373
390769199222,13cyclictest152304-21taskset00:15:143
390769199222,12cyclictest118773-21taskset23:55:063
390769199221,18cyclictest0-21swapper/321:19:363
390769199221,16cyclictest4062268-21sleep21:25:003
39762082210,9sleep134-21ksoftirqd/120:10:191
390769199216,7cyclictest85558-21taskset23:35:013
390769199212,13cyclictest165229-21taskset00:20:393
390769199212,13cyclictest165229-21taskset00:20:393
3907691992117,2cyclictest0-21swapper/322:20:133
390769199211,15cyclictest3968031-21chrt20:05:133
3907691992110,8cyclictest0-21swapper/322:30:273
390769199210,17cyclictest4135353-21taskset22:07:063
390769199210,13cyclictest66035-21taskset23:20:413
162442211,8sleep04037014-21diskmemload22:51:220
390769199209,7cyclictest4084968-21taskset21:36:233
390769199208,8cyclictest3967761-21turbostat20:05:013
390769199202,14cyclictest10447-21sleep22:50:003
390769199202,12cyclictest69179-21taskset23:25:033
3907691992017,1cyclictest0-21swapper/300:26:223
3907691992015,3cyclictest0-21swapper/323:45:173
3907691992011,6cyclictest67150irq/132-enp1s0-TxRx-300:14:343
3907691992011,6cyclictest0-21swapper/322:12:443
390769199201,15cyclictest3951888-21turbostat19:49:593
390769199201,15cyclictest0-21swapper/321:00:123
390769199201,14cyclictest4170110-21chrt22:28:513
390769199201,14cyclictest176403-21chrt00:30:053
390769199200,16cyclictest3946634-21turbostat19:45:003
41196762191,5sleep24037014-21diskmemload21:58:362
40778542191,4sleep04037014-21diskmemload21:33:200
390769199194,12cyclictest67150irq/132-enp1s0-TxRx-322:15:223
390769199191,9cyclictest4079078-21turbostat21:35:003
3907691991916,1cyclictest0-21swapper/321:55:153
3907691991916,1cyclictest0-21swapper/319:50:173
3907691991916,1cyclictest0-21swapper/300:00:173
3907691991915,2cyclictest0-21swapper/323:05:173
3907691991915,2cyclictest0-21swapper/320:30:263
3907691991914,2cyclictest0-21swapper/322:42:103
390769199191,14cyclictest0-21swapper/321:11:553
390769199191,14cyclictest0-21swapper/300:05:223
390769199191,13cyclictest4125981-21chrt22:00:353
41783002181,3sleep10-21swapper/122:33:391
40789692181,5sleep20-21swapper/221:34:542
40687502181,3sleep10-21swapper/121:27:241
40415112189,4sleep14041558-21ntpq21:10:191
390769199183,13cyclictest0-21swapper/319:55:393
390769199182,12cyclictest99368-21taskset23:41:023
390769199182,10cyclictest4095965-21taskset21:45:053
3907691991815,1cyclictest0-21swapper/321:05:253
390769199181,14cyclictest0-21swapper/322:37:133
390769199181,13cyclictest0-21swapper/321:50:433
390769199181,10cyclictest81911-21taskset23:30:243
390769199180,16cyclictest0-21swapper/323:50:043
390769199180,14cyclictest0-21swapper/320:50:123
390769199180,11cyclictest27328-21chrt23:00:003
1818072181,10sleep1181818-21ssh00:31:121
72552171,4sleep24037014-21diskmemload22:45:302
671382171,10sleep04037014-21diskmemload23:22:240
41362092171,2sleep00-21swapper/022:08:200
41034922171,4sleep04037014-21diskmemload21:49:160
390769199177,8cyclictest4004756-21turbostat20:44:553
390769199177,8cyclictest4004756-21turbostat20:44:553
3907691991714,1cyclictest0-21swapper/320:55:203
3907691991714,1cyclictest0-21swapper/319:30:183
3907691991714,1cyclictest0-21swapper/319:25:143
390769199171,13cyclictest0-21swapper/320:15:133
390769199170,13cyclictest0-21swapper/321:25:043
1653802177,2sleep2171rcu_preempt00:20:592
1653802177,2sleep2171rcu_preempt00:20:592
1006552171,5sleep1100665-21ssh23:43:021
3907691991613,1cyclictest0-21swapper/320:35:163
3907691991613,1cyclictest0-21swapper/320:35:163
3907691991613,1cyclictest0-21swapper/320:20:163
390769199161,11cyclictest3915152-21chrt19:15:113
390769199161,10cyclictest3993002-21taskset20:25:253
390769199160,3cyclictest0-21swapper/319:35:223
390769199160,3cyclictest0-21swapper/319:35:213
390769199160,13cyclictest0-21swapper/320:45:193
390769199160,11cyclictest3925214-21chrt19:21:393
1428902161,2sleep20-21swapper/200:09:252
41428242151,2sleep10-21swapper/122:10:501
41377172150,6sleep20-21swapper/222:10:112
41262772151,3sleep04126288-21ssh22:01:030
40947322151,8sleep04037014-21diskmemload21:43:350
40920592151,10sleep14092190-21/usr/sbin/munin21:40:231
40782882154,6sleep14075976-21kworker/u16:1+xprtiod21:33:571
40266732151,1sleep20-21swapper/221:00:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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