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2025-11-24 - 17:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 here to display the system's profile data or here to proceed to next system.
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 20 highest latencies:
System rackcslot7s.osadl.org (updated Mon Nov 24, 2025 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35131332970,4sleep10-21swapper/107:20:161
35425682910,6sleep20-21swapper/208:45:022
3508588998221,43cyclictest438-20systemd-journal10:24:211
350815028062,11sleep30-21swapper/307:06:073
162399790,65rtkit-daemon0-21swapper/107:06:331
35970622740,6sleep30-21swapper/311:20:153
350822127439,9sleep20-21swapper/207:07:022
350821427451,17sleep00-21swapper/007:06:560
350858899641,37cyclictest3582830-21sed10:40:011
35591632620,7chrt2197014-21PK-Backend09:30:270
3508590996230,27cyclictest3548066-21cpuspeed_turbos09:00:122
350859499611,14cyclictest3539194-21taskset08:35:113
350859499611,14cyclictest3539194-21taskset08:35:103
350858899612,34cyclictest1753-21gnome-shell07:35:021
350858899602,35cyclictest1753-21gnome-shell11:40:221
350858899602,34cyclictest1753-21gnome-shell12:10:351
3508588996015,40cyclictest1795-21gmain08:20:021
350858899601,34cyclictest3611384-21awk12:00:221
3508588995925,30cyclictest3526453-21sh08:00:001
3508584995925,30cyclictest3529903-21sshd08:09:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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