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2026-01-21 - 00:01
[ 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 50 highest latencies:
System rack3slot3s.osadl.org (updated Tue Jan 20, 2026 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1824436212153,63sleep30-21swapper/307:09:073
182428328066,9sleep10-21swapper/107:07:081
182416727851,19sleep00-21swapper/007:05:380
182449727762,9sleep20-21swapper/207:09:502
18906512290,4sleep0221rcuc/008:10:110
1824645992623,1cyclictest0-21swapper/310:45:223
182464599241,19cyclictest2026908-21taskset10:20:113
1824645992320,1cyclictest0-21swapper/311:00:193
1824645992319,2cyclictest0-21swapper/309:39:593
1824645992219,1cyclictest0-21swapper/309:20:213
1824645992219,1cyclictest0-21swapper/307:40:013
1824645992118,1cyclictest0-21swapper/311:15:213
20955412201,10sleep12095578-21grep11:25:161
182464599202,12cyclictest2042680-21taskset10:35:113
1824645992017,1cyclictest0-21swapper/311:20:143
1824645992017,1cyclictest0-21swapper/308:20:163
1824645992010,7cyclictest1952956-21taskset09:09:423
182464599192,11cyclictest2121517-21taskset11:50:103
182464599192,11cyclictest1826512-21taskset07:10:143
1824645991917,1cyclictest0-21swapper/312:00:163
1824645991916,1cyclictest0-21swapper/310:05:003
182464599191,14cyclictest0-21swapper/307:30:113
182464599185,1cyclictest0-21swapper/312:05:263
1824645991815,1cyclictest0-21swapper/311:40:163
1824645991815,1cyclictest0-21swapper/311:35:153
1824645991815,1cyclictest0-21swapper/309:25:153
1824645991815,1cyclictest0-21swapper/308:55:173
1824645991815,1cyclictest0-21swapper/308:50:163
1824645991815,1cyclictest0-21swapper/308:50:163
182464599181,13cyclictest1995246-21turbostat09:50:003
182464599181,10cyclictest1985054-21taskset09:40:123
182464599180,14cyclictest2000370-21taskset09:53:513
182464599180,14cyclictest0-21swapper/308:49:193
1824645991715,1cyclictest0-21swapper/309:10:173
1824645991714,1cyclictest0-21swapper/310:30:113
1824645991714,1cyclictest0-21swapper/307:50:173
1824645991714,1cyclictest0-21swapper/307:20:243
182464599171,3cyclictest0-21swapper/309:03:183
1824645991713,2cyclictest0-21swapper/312:10:163
182464599171,13cyclictest0-21swapper/307:55:203
182464599171,12cyclictest2105573-21turbostat11:35:013
182464599171,12cyclictest2037177-21turbostat10:30:013
182464599171,12cyclictest2021650-21chrt10:15:113
182464599171,12cyclictest1853595-21taskset07:35:103
182464599171,12cyclictest0-21swapper/311:45:223
182464599171,12cyclictest0-21swapper/308:30:123
182464599170,14cyclictest0-21swapper/310:50:113
19530992161,10sleep01953130-21perf09:10:000
182464599161,9cyclictest2169072-21taskset12:35:073
182464599161,9cyclictest2148064-21taskset12:15:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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