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2026-02-21 - 22:07
[ 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 Sat Feb 21, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2435290995537,16cyclictest2690075-21apt-get11:25:001
2435286995241,9cyclictest274-21systemd-journal11:40:000
2435291994844,3cyclictest2650516-21kworker/u8:0+events_unbound12:16:162
2435291994843,4cyclictest2586490-21kworker/u8:3+flush-8:009:56:162
2435290994830,16cyclictest2764749-21systemd-run12:40:001
243528699481,33cyclictest2690121-21munin-run11:25:000
2435291994742,4cyclictest2581509-21kworker/u8:1+flush-8:010:31:142
2435290994727,8cyclictest274-21systemd-journal12:28:141
2435286994739,6cyclictest274-21systemd-journal11:00:010
2435286994637,6cyclictest2591224-21latency_hist09:45:010
2435286994621,7cyclictest2456895-21latency_hist07:30:010
26588782440,3sleep10-21swapper/110:51:091
2435291994440,3cyclictest2581509-21kworker/u8:1+flush-8:009:41:022
2435286994435,6cyclictest2620801-21latency_hist10:15:020
2435286994435,6cyclictest2420416-21kworker/u8:2+flush-8:008:26:020
2435291994338,3cyclictest2734994-21kworker/u8:3+events_unbound12:11:142
2435290994326,3cyclictest2467489-21cut07:41:021
2435286994327,2cyclictest2501812-21cron08:15:000
2435286994324,4cyclictest2476699-21cron07:50:000
2435286994323,6cyclictest274-21systemd-journal08:25:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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