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2026-02-17 - 09:10
[ 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 #5, slot #4

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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  Intel
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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack5slot4s.osadl.org (updated Tue Feb 17, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
115825821800,3sleep3584-21kworker/3:2+events21:41:073
12006972830,5chrt0-21swapper/322:21:173
10196982670,2sleep3471rcuc/319:21:093
10196982670,2sleep3471rcuc/319:21:093
11129562630,3sleep11112952-21sed20:56:081
11803352590,0chrt201rcuc/022:01:110
10675062580,3sleep00-21swapper/020:10:010
1005860995748,7cyclictest1295862-21apt-get00:00:001
10207782560,13chrt0-21swapper/019:21:100
10207782560,13chrt0-21swapper/019:21:100
1005860995349,3cyclictest1042624-21kworker/u8:2+events_unbound19:46:181
1005860995247,4cyclictest1062436-21kworker/u8:1+events_unbound23:01:181
1005860995240,3cyclictest1206373-21kworker/u8:3+events_unbound23:36:011
1005860995146,3cyclictest640376-21kworker/u8:4+events_unbound19:15:021
1005860995044,4cyclictest1261063-21kworker/u8:1+flush-8:000:36:181
1005858995041,7cyclictest274-21systemd-journal21:05:010
1005864994742,4cyclictest640376-21kworker/u8:4+events_unbound19:21:182
1005864994742,4cyclictest640376-21kworker/u8:4+events_unbound19:21:182
10959682460,6sleep20-21swapper/220:36:112
1005860994641,3cyclictest1220429-21kworker/u8:2+events_unbound23:26:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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