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2026-07-07 - 07:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot4s.osadl.org (updated Tue Jul 07, 2026 00:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
991197995245,5cyclictest1256158-21latency_hist23:30:011
991205994942,5cyclictest1204735-21latency_hist22:40:013
99119499490,48cyclictest509-21rs:main0
991194994744,2cyclictest1215028-21kworker/u8:2+events_unbound23:05:020
991200994537,3cyclictest1012644-21kworker/u8:1+events_unbound19:55:012
991194994540,4cyclictest1152712-21latency_hist21:50:010
991194994441,2cyclictest1173538-21kworker/u8:3+events_unbound23:45:000
991200994339,3cyclictest1121118-21kworker/u8:1+events_unbound22:05:122
991194994138,2cyclictest996971-21kworker/u8:0+events_unbound19:33:180
991200994037,2cyclictest1064705-21kworker/u8:3+events_unbound20:25:152
991197994034,4cyclictest1094751-21ntpq20:50:221
991194994037,2cyclictest1173538-21kworker/u8:3+events_unbound23:30:270
991205993933,4cyclictest1064705-21kworker/u8:3+flush-259:020:45:173
991194993936,2cyclictest996971-21kworker/u8:0+events_unbound19:39:170
991200993835,2cyclictest1064705-21kworker/u8:3+events_unbound21:25:202
991200993835,2cyclictest1064705-21kworker/u8:3+events_unbound21:25:192
991194993836,2cyclictest1121118-21kworker/u8:1+events_unbound21:56:280
991194993833,4cyclictest335557-21systemd-journal23:55:010
991200993734,2cyclictest1064705-21kworker/u8:3+flush-259:020:45:212
991200993731,4cyclictest1282070-21kworker/u8:1+events_unbound23:55:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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