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2026-02-15 - 11:56
[ 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 Sun Feb 15, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1253760213065,61sleep30-21swapper/319:06:263
1253916211293,12sleep20-21swapper/219:08:252
124925528864,11sleep10-21swapper/119:05:121
125397227249,15sleep00-21swapper/019:09:080
15459572511,3sleep21545966-21sh22:47:582
1254166994913,32cyclictest0-21swapper/323:21:353
125416699491,22cyclictest0-21swapper/300:26:183
125416699490,19cyclictest0-21swapper/322:35:213
125416699470,17cyclictest0-21swapper/323:46:153
125416699458,17cyclictest63750irq/124-enp1s0-TxRx-021:19:043
125416699458,17cyclictest63750irq/124-enp1s0-TxRx-021:19:043
1254166994542,1cyclictest0-21swapper/300:18:443
125416699450,43cyclictest0-21swapper/320:45:143
125416699450,20cyclictest0-21swapper/300:05:283
1254166994441,1cyclictest0-21swapper/320:06:083
125416699441,14cyclictest0-21swapper/300:01:173
1254166994136,3cyclictest14544562sleep321:53:563
125416699413,22cyclictest0-21swapper/323:33:473
125416699410,28cyclictest0-21swapper/321:38:063
1254166994026,3cyclictest1374510-21taskset21:02:453
1254166994016,1cyclictest0-21swapper/321:12:523
125416699398,10cyclictest0-21swapper/322:02:293
1254166993934,3cyclictest16390652sleep323:42:473
1254166993917,16cyclictest15024292sleep322:21:223
125416699384,25cyclictest0-21swapper/300:20:433
1254166993834,3cyclictest63750irq/124-enp1s0-TxRx-000:30:353
1254166993831,2cyclictest0-21swapper/322:55:173
125416699380,36cyclictest0-21swapper/323:13:413
125416699377,14cyclictest0-21swapper/322:05:053
1254166993711,14cyclictest14875292sleep322:13:533
125416699370,19cyclictest63750irq/124-enp1s0-TxRx-021:55:563
125416699365,8cyclictest0-21swapper/322:51:223
1254166993633,2cyclictest0-21swapper/323:04:163
1254166993622,11cyclictest16548972sleep323:51:413
125416699360,29cyclictest15203792sleep322:32:403
125416699360,16cyclictest0-21swapper/321:47:123
1254166993523,1cyclictest0-21swapper/323:35:023
125416699342,22cyclictest0-21swapper/320:10:553
125416699342,22cyclictest0-21swapper/320:10:553
1254166993330,2cyclictest0-21swapper/320:40:143
1254166993327,3cyclictest14215342sleep321:34:433
16909632321,2sleep20-21swapper/200:15:052
16570102320,1sleep10-21swapper/123:54:401
14852452320,1sleep20-21swapper/222:10:422
125416699321,12cyclictest0-21swapper/322:15:123
125416699320,13cyclictest0-21swapper/319:30:113
125416699311,15cyclictest63750irq/124-enp1s0-TxRx-022:25:023
16298302300,1sleep10-21swapper/123:36:321
125416699300,16cyclictest0-21swapper/319:25:213
125416699294,12cyclictest14108942sleep321:26:263
1254166992926,2cyclictest0-21swapper/320:35:203
1254166992926,2cyclictest0-21swapper/300:36:173
125416699291,13cyclictest0-21swapper/323:05:143
125416699290,14cyclictest63750irq/124-enp1s0-TxRx-019:40:263
16380732280,1sleep20-21swapper/223:41:192
14550102280,1sleep20-21swapper/221:54:432
1254166992724,1cyclictest0-21swapper/320:50:403
1254166992723,1cyclictest0-21swapper/323:26:573
1254166992722,3cyclictest63750irq/124-enp1s0-TxRx-023:56:153
1254166992613,1cyclictest0-21swapper/322:45:233
125416699261,24cyclictest63750irq/124-enp1s0-TxRx-021:22:523
125416699260,23cyclictest0-21swapper/322:40:513
125416699260,15cyclictest0-21swapper/320:30:103
14459482240,1sleep20-21swapper/221:49:052
1254166992419,3cyclictest0-21swapper/321:44:253
16205902230,1sleep20-21swapper/223:30:482
125416699231,1cyclictest0-21swapper/319:45:333
1254166992219,1cyclictest0-21swapper/319:14:293
125416699220,20cyclictest0-21swapper/323:18:453
125416699220,10cyclictest0-21swapper/319:15:123
125416699220,10cyclictest0-21swapper/319:15:123
125416699210,10cyclictest0-21swapper/319:37:453
15716002201,4sleep01571614-21ssh23:03:240
15618072201,2sleep20-21swapper/222:56:322
1254166992018,1cyclictest0-21swapper/320:18:023
1254166992018,1cyclictest0-21swapper/320:18:013
125416699201,15cyclictest0-21swapper/300:13:013
125416699200,9cyclictest0-21swapper/321:05:103
125416699200,9cyclictest0-21swapper/320:25:223
125416699200,8cyclictest0-21swapper/319:55:153
125416699200,11cyclictest0-21swapper/319:20:113
17067862190,1sleep00-21swapper/000:24:140
15950852191,3sleep20-21swapper/223:15:332
125416699190,2cyclictest0-21swapper/320:00:193
16822772181,11sleep21379804-21diskmemload00:09:532
15786502180,3sleep01578662-21ssh23:06:330
15215102181,3sleep20-21swapper/222:34:112
14215222181,4sleep20-21swapper/221:34:422
14132082181,4sleep21379804-21diskmemload21:29:452
15363712171,3sleep11379804-21diskmemload22:41:281
14375232170,1sleep20-21swapper/221:44:002
17309452162,2sleep10-21swapper/100:38:131
17162852161,1sleep00-21swapper/000:30:140
16827852165,7sleep21683021-21cat00:10:122
14286432161,2sleep01428650-21ssh21:38:010
14280862161,3sleep21379804-21diskmemload21:37:122
125416699161,3cyclictest0-21swapper/320:20:133
125416699160,4cyclictest0-21swapper/319:50:113
125416699160,13cyclictest0-21swapper/320:55:143
17142612151,8sleep11379804-21diskmemload00:28:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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