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2026-01-17 - 23:51
[ 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 50 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
1710702200,4sleep134-21ksoftirqd/110:45:251
413056199198,8cyclictest1141292chrt09:55:143
413056199197,8cyclictest12691-21taskset08:16:583
413056199192,10cyclictest4157536-21taskset07:30:173
4130561991916,1cyclictest0-21swapper/312:20:183
4130561991916,1cyclictest0-21swapper/311:55:173
4130561991916,1cyclictest0-21swapper/307:50:003
4130561991916,1cyclictest0-21swapper/307:36:003
4130561991916,1cyclictest0-21swapper/307:10:123
4130561991915,1cyclictest0-21swapper/308:30:183
413056199191,13cyclictest0-21swapper/310:20:123
1410072191,8sleep2141222-21if_enp1s010:20:152
4130561991815,1cyclictest0-21swapper/307:55:223
413056199181,14cyclictest0-21swapper/309:00:123
413056199181,14cyclictest0-21swapper/308:28:193
413056199181,10cyclictest69368-21taskset09:10:173
413056199181,10cyclictest4200-21taskset08:10:163
413056199181,10cyclictest4179762-21taskset07:50:213
413056199180,15cyclictest60628-21turbostat09:09:543
413056199180,14cyclictest0-21swapper/308:05:273
413056199180,13cyclictest0-21swapper/311:50:143
413056199172,10cyclictest230410-21taskset11:45:123
4130561991714,1cyclictest0-21swapper/310:50:173
4130561991713,2cyclictest0-21swapper/311:05:163
413056199171,13cyclictest219765-21chrt11:35:143
413056199171,13cyclictest0-21swapper/310:05:233
413056199171,12cyclictest39457-21chrt08:45:003
413056199171,12cyclictest282535-21sleep12:35:003
413056199171,12cyclictest0-21swapper/310:35:213
413056199171,12cyclictest0-21swapper/310:10:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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