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2026-02-23 - 11:41
[ 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 Mon Feb 23, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21527521880,2sleep3471rcuc/321:14:113
4160032970,6chrt0-21swapper/200:36:052
1927182570,2chrt481ktimers/320:51:043
89552995632,9cyclictest344216-21apt-get23:25:001
89552995332,6cyclictest101340-21latency_hist19:20:011
89549994843,4cyclictest106540-21kworker/u8:2+flush-8:019:41:120
89549994839,6cyclictest354348-21latency_hist23:35:000
3784432480,2sleep3584-21kworker/3:2-events23:56:143
89552994539,4cyclictest136436-21kworker/u8:1+flush-8:020:11:141
89552994337,4cyclictest116009-21kworker/u8:0+events_unbound20:01:031
89549994339,3cyclictest175721-21kworker/u8:2+flush-8:020:36:140
89549994336,4cyclictest250437-21kworker/u8:0+flush-8:000:10:590
8936624328,10sleep10-21swapper/119:09:481
3892082430,4chrt0-21swapper/200:10:012
89549994131,8cyclictest230957-21diskstats21:30:580
886882411,8sleep30-21swapper/319:06:123
89552993929,7cyclictest274-21systemd-journal23:03:121
89549993934,4cyclictest190647-21kworker/u8:1+events_unbound21:00:000
89549993933,4cyclictest69490-21kworker/u8:1+flush-8:019:20:010
89549993931,6cyclictest339598-21apt-get23:20:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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