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2026-01-18 - 00:37
[ 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 20 highest latencies:
System rack3slot3s.osadl.org (updated Sat Jan 17, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23070622240,2sleep1321rcuc/111:45:141
4130310212354,64sleep30-21swapper/307:08:203
413013628958,10sleep10-21swapper/107:06:071
413019728065,9sleep20-21swapper/207:06:552
413042427753,6sleep00-21swapper/007:09:470
4130561992421,1cyclictest0-21swapper/312:05:143
4130561992421,1cyclictest0-21swapper/309:55:003
1936422241,11sleep0193721-21grep11:10:150
4130561992320,1cyclictest0-21swapper/311:15:123
4130561992312,7cyclictest17455-21taskset08:20:223
2867662231,6sleep0286812-21ntpq12:35:200
4130561992219,1cyclictest0-21swapper/309:35:013
413056199212,13cyclictest4165160-21taskset07:40:113
413056199212,12cyclictest224813-21taskset11:40:033
4130561992119,1cyclictest0-21swapper/307:20:173
4130561992118,1cyclictest0-21swapper/311:00:223
4130561992118,1cyclictest0-21swapper/310:55:203
4130561992117,2cyclictest0-21swapper/308:40:013
4130561992018,1cyclictest0-21swapper/309:00:003
4130561992016,3cyclictest15850irq/127-ahci[0000:00:17.0]07:15:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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