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2026-02-25 - 08:05
[ 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 Wed Feb 25, 2026 00:43:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
122244499631,52cyclictest0-21swapper/323:23:423
1222435996359,2cyclictest1585481-21/usr/sbin/munin23:30:111
122244499600,44cyclictest0-21swapper/322:49:413
122244499600,43cyclictest0-21swapper/321:22:573
122244499590,56cyclictest0-21swapper/323:45:163
122244499586,49cyclictest0-21swapper/321:55:133
1222428995755,1cyclictest0-21swapper/021:58:530
1222428995546,6cyclictest777-21snmpd00:33:240
122244499541,37cyclictest0-21swapper/322:01:363
122244499540,45cyclictest1226386-21ntpq19:10:213
122244499540,31cyclictest0-21swapper/300:02:463
122244499540,30cyclictest0-21swapper/323:01:373
1222435995453,1cyclictest0-21swapper/120:42:381
1222435995428,21cyclictest779-21runrttasks00:03:141
122244499530,35cyclictest0-21swapper/300:13:283
1222444995246,2cyclictest1277736-21/usr/sbin/munin20:05:203
122244499520,44cyclictest0-21swapper/321:42:163
122244499520,38cyclictest0-21swapper/322:42:063
122244499513,45cyclictest1343004-21diskmemload22:17:573
122244499510,48cyclictest0-21swapper/300:18:083
122244499510,37cyclictest0-21swapper/322:51:513
122244499510,37cyclictest0-21swapper/322:51:513
122244499510,30cyclictest0-21swapper/322:10:293
122244499500,36cyclictest1343004-21diskmemload21:45:183
122244499500,36cyclictest1343004-21diskmemload21:45:173
122244499500,30cyclictest0-21swapper/321:26:223
122243599500,1cyclictest0-21swapper/122:25:121
122244499495,33cyclictest1344087-21kthreadcore21:10:173
1222444994944,4cyclictest491ktimers/319:15:293
122244499491,21cyclictest1343004-21diskmemload21:50:093
1222439994942,6cyclictest777-21snmpd21:51:462
122244499480,46cyclictest0-21swapper/319:54:533
122244499480,43cyclictest0-21swapper/323:28:533
122244499480,32cyclictest0-21swapper/322:25:333
122244499477,37cyclictest0-21swapper/321:35:083
122244499476,38cyclictest62850irq/124-enp1s0-TxRx-023:10:433
1222444994713,25cyclictest1343004-21diskmemload21:18:443
122244499470,39cyclictest0-21swapper/322:58:403
122244499470,33cyclictest0-21swapper/321:33:183
122244499470,32cyclictest0-21swapper/300:37:323
1222439994744,2cyclictest779-21runrttasks00:26:232
122243999470,44cyclictest0-21swapper/222:44:002
1222435994746,1cyclictest0-21swapper/123:04:081
1222444994622,14cyclictest741-21ntpd23:58:123
122244499460,30cyclictest0-21swapper/320:48:013
122244499460,30cyclictest0-21swapper/320:48:003
1222439994643,2cyclictest1548554-21sh23:07:492
122244499450,42cyclictest62850irq/124-enp1s0-TxRx-022:31:183
122244499450,35cyclictest0-21swapper/300:26:443
1222435994443,1cyclictest0-21swapper/123:23:051
1222428994440,2cyclictest1615533-21/usr/sbin/munin23:45:190
122244499430,22cyclictest0-21swapper/321:01:313
1222435994340,2cyclictest0-21swapper/100:33:081
122243599430,43cyclictest0-21swapper/123:54:351
1222428994339,3cyclictest151ktimers/023:38:500
1222428994332,2cyclictest171rcu_preempt22:33:410
122242899431,2cyclictest0-21swapper/023:15:160
122244499420,26cyclictest0-21swapper/322:35:183
122244499420,21cyclictest0-21swapper/322:05:093
1222439994238,3cyclictest401ktimers/222:52:122
1222439994238,3cyclictest401ktimers/222:52:112
1222435994241,1cyclictest0-21swapper/119:56:111
1222435994240,2cyclictest311ktimers/123:37:521
1222435994240,2cyclictest311ktimers/119:17:091
1222428994235,6cyclictest1343004-21diskmemload22:05:280
122244499412,20cyclictest1343004-21diskmemload00:08:363
122244499411,18cyclictest1332040-21ntpq20:55:213
122244499401,33cyclictest1343004-21diskmemload23:06:473
122244499400,38cyclictest0-21swapper/323:30:143
122243999408,31cyclictest1439340-21kworker/u16:1+nfsiod23:02:482
1222439994039,1cyclictest0-21swapper/220:16:492
1222439994037,3cyclictest401ktimers/222:11:542
1222435994036,1cyclictest0-21swapper/123:29:571
1222435994026,13cyclictest588-21gpm22:10:391
1222428994038,1cyclictest0-21swapper/022:26:230
1222428994035,3cyclictest201rcuc/021:40:160
1222428994035,1cyclictest171rcu_preempt23:57:310
1222444993937,1cyclictest0-21swapper/320:35:253
122244499390,36cyclictest0-21swapper/300:24:333
1222439993938,1cyclictest0-21swapper/200:20:192
1222435993938,1cyclictest0-21swapper/100:19:231
1222428993914,12cyclictest1343004-21diskmemload21:27:530
122244499381,31cyclictest779-21runrttasks23:54:223
1222435993836,1cyclictest0-21swapper/120:15:081
122243599381,34cyclictest0-21swapper/122:00:001
1222428993834,3cyclictest201rcuc/022:10:050
1222428993834,3cyclictest151ktimers/022:47:520
122244499375,27cyclictest1343004-21diskmemload23:43:353
1222435993734,2cyclictest1393151-21diskmemload21:38:051
1222428993735,1cyclictest0-21swapper/000:16:470
1222428993732,2cyclictest0-21swapper/023:28:590
122244499361,32cyclictest0-21swapper/322:22:273
122243999366,28cyclictest1628234-21ssh23:54:362
122243999361,12cyclictest779-21runrttasks22:26:262
1222435993633,2cyclictest1222426-21cyclictest00:20:441
122243599360,36cyclictest0-21swapper/123:47:311
122243599360,24cyclictest1343004-21diskmemload22:54:081
122243599360,24cyclictest1343004-21diskmemload22:54:071
1222428993632,3cyclictest151ktimers/022:52:260
1222428993632,3cyclictest151ktimers/022:52:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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