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2026-02-23 - 19:51
[ 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 #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 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
234691922080,3sleep3584-21kworker/3:2-events11:01:073
24398092710,3sleep3584-21kworker/3:2-events12:36:053
24398092710,3sleep3584-21kworker/3:2-events12:36:053
21182962690,6sleep30-21swapper/307:15:013
24247712590,4chrt481ktimers/312:21:043
2113437995042,6cyclictest2225057-21latency_hist09:00:010
2113437994840,5cyclictest2160591-21kworker/u8:2+flush-8:008:06:130
2113444994741,4cyclictest2145253-21gpgv07:40:002
2113439994738,7cyclictest2279702-21kworker/u8:1+flush-8:012:06:121
2113437994640,4cyclictest2269810-21kworker/u8:0+flush-8:011:26:120
2113444994435,6cyclictest2165802-21cp08:00:012
2113439994333,8cyclictest274-21systemd-journal09:20:001
2113439994333,7cyclictest274-21systemd-journal09:00:111
2113439994328,13cyclictest2364327-21/usr/sbin/munin11:21:071
2113437994233,6cyclictest2294556-21latency_hist10:10:010
2113444994136,4cyclictest2269810-21kworker/u8:0+flush-8:010:01:002
2113437994131,8cyclictest2125187-21apt-get07:20:000
2113444993929,7cyclictest2170908-21cat08:05:012
2113439993928,8cyclictest2129455-21ntpq07:21:091
2113439993925,12cyclictest274-21systemd-journal12:00:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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