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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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 here to display the system's profile data or here to proceed to next system.
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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Fri Jan 23, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
45872117106,6sleep10-21swapper/119:07:171
559721130,1sleep337-21rcuc/322:39:083
4760211393,15sleep00-21swapper/019:09:320
454129777,15sleep20-21swapper/219:06:422
442829684,6sleep30-21swapper/319:05:273
174252790,0sleep20-21swapper/223:26:052
248162740,0sleep30-21swapper/321:13:263
74522690,0sleep00-21swapper/023:15:210
158762680,0sleep10-21swapper/121:39:221
311982270,1sleep3381ktimersoftd/322:30:253
131412240,0sleep20-21swapper/200:32:512
482799210,19cyclictest0-21swapper/121:00:121
482799200,2cyclictest0-21swapper/119:50:101
482799200,18cyclictest0-21swapper/120:00:121
482699200,18cyclictest0-21swapper/020:00:120
308582190,0sleep10-21swapper/123:40:431
482799182,2cyclictest23-21ksoftirqd/121:15:041
4827991815,2cyclictest9899-21kworker/u8:222:56:051
4827991815,2cyclictest23253-21kworker/u8:023:26:051
4827991815,2cyclictest23253-21kworker/u8:023:02:051
4828991714,2cyclictest31925-21kworker/u8:221:21:042
4828991714,2cyclictest23253-21kworker/u8:023:12:042
4827991714,2cyclictest9268-21kworker/u8:020:53:041
4827991714,2cyclictest4984-21kworker/u8:121:47:051
4827991714,2cyclictest4984-21kworker/u8:121:27:041
4827991714,2cyclictest28621-21kworker/u8:123:06:051
4827991714,2cyclictest25590-21kworker/u8:221:54:041
4827991714,2cyclictest1864-21kworker/u8:122:42:051
482799170,5cyclictest0-21swapper/120:27:591
482999161,13cyclictest0-21swapper/322:27:573
4827991613,2cyclictest9268-21kworker/u8:020:57:051
4827991613,2cyclictest8614-21kworker/u8:000:13:041
4827991613,2cyclictest7178-21kworker/u8:119:22:051
4827991613,2cyclictest31049-21kworker/u8:220:24:051
4827991613,2cyclictest3068-21kworker/u8:120:31:051
4827991613,2cyclictest23265-21kworker/u8:222:33:051
4827991613,2cyclictest15416-21kworker/u8:019:37:051
4827991613,2cyclictest10000-21kworker/u8:219:19:041
482799161,2cyclictest21121-21diskmemload22:02:051
482799161,2cyclictest21121-21diskmemload22:02:041
482999151,3cyclictest6631-21ssh23:50:163
482999151,12cyclictest16131-21ssh23:25:173
4829991510,3cyclictest0-21swapper/321:22:463
482999150,3cyclictest0-21swapper/322:41:573
482999150,13cyclictest8734-21ssh00:28:073
482999150,13cyclictest0-21swapper/320:05:123
482999150,13cyclictest0-21swapper/320:00:253
4828991512,2cyclictest23265-21kworker/u8:222:24:042
482899151,12cyclictest0-21swapper/223:17:362
482899150,13cyclictest27066-21tail21:50:262
4827991512,2cyclictest8614-21kworker/u8:023:56:051
4827991512,2cyclictest4984-21kworker/u8:121:33:041
4827991512,2cyclictest31049-21kworker/u8:221:10:051
4827991512,2cyclictest31049-21kworker/u8:220:47:051
4827991512,2cyclictest18872-21kworker/u8:119:43:041
4827991512,2cyclictest18546-21kworker/u8:122:25:041
4827991512,2cyclictest15416-21kworker/u8:019:47:051
4827991512,2cyclictest12354-21kworker/u8:022:11:041
4827991512,2cyclictest10000-21kworker/u8:219:33:051
482799150,2cyclictest32568-21ssh00:19:051
482799150,2cyclictest0-21swapper/123:30:051
482799150,2cyclictest0-21swapper/122:15:051
482799150,11cyclictest0-21swapper/123:17:041
482699151,12cyclictest0-21swapper/023:48:510
482999141,3cyclictest804-21ssh23:44:523
4829991411,2cyclictest21121-21diskmemload00:12:473
482999141,11cyclictest9893-21ssh22:07:513
482999140,12cyclictest0-21swapper/300:35:283
4828991411,2cyclictest0-21swapper/223:50:292
4828991411,2cyclictest0-21swapper/222:41:092
4828991411,2cyclictest0-21swapper/221:10:212
4828991411,2cyclictest0-21swapper/200:35:282
482899141,11cyclictest541-21ssh22:33:172
482899140,3cyclictest9882-21ssh22:07:502
482899140,3cyclictest0-21swapper/200:12:402
482899140,2cyclictest0-21swapper/223:40:122
482899140,13cyclictest27763-21ssh23:38:082
482899140,13cyclictest0-21swapper/221:31:092
482899140,13cyclictest0-21swapper/221:18:482
482799142,4cyclictest0-21swapper/119:28:011
482799141,3cyclictest2694-21cut23:10:181
4827991411,2cyclictest822-21kworker/u8:123:49:041
4827991411,2cyclictest31049-21kworker/u8:221:08:041
4827991411,2cyclictest27110-21kworker/u8:020:09:051
4827991411,2cyclictest13795-21kworker/u8:100:07:051
4827991411,2cyclictest13639-21kworker/u8:223:24:041
4827991411,2cyclictest0-21swapper/120:35:201
4827991411,2cyclictest0-21swapper/100:00:141
482799140,3cyclictest0-21swapper/122:47:581
482799140,2cyclictest4806-21ssh22:37:491
482799140,2cyclictest0-21swapper/121:22:401
482799140,2cyclictest0-21swapper/100:28:041
482799140,12cyclictest8815-21chrt23:52:251
482799140,12cyclictest21121-21diskmemload22:09:491
482799140,12cyclictest0-21swapper/100:32:041
4826991411,2cyclictest0-21swapper/023:25:350
4826991411,2cyclictest0-21swapper/022:45:250
482699140,12cyclictest6629-21ssh21:29:040
482699140,12cyclictest2636-21ssh23:10:170
482699140,12cyclictest0-21swapper/023:20:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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