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2025-11-28 - 10:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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.
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 rack0slot4s.osadl.org (updated Fri Nov 28, 2025 00:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
175922025755,1sleep90-21swapper/919:07:4415
175905525654,1sleep100-21swapper/1019:05:372
175923124829,18sleep140-21swapper/1419:07:496
424698470,45rtkit-daemon0-21swapper/119:08:281
175911324644,1sleep70-21swapper/719:06:2213
175938424240,1sleep40-21swapper/419:09:3210
175909824239,1sleep110-21swapper/1119:06:103
1759933994038,2cyclictest1955543-21kworker/u32:1+events_unbound23:10:1810
1759924994038,1cyclictest0-21swapper/119:35:161
175929423936,2sleep150-21swapper/1519:08:387
1759959993837,1cyclictest1768793-21kworker/u32:3+flush-259:019:50:205
175923623836,1sleep20-21swapper/219:07:538
175916123734,2sleep120-21swapper/1219:06:594
175920523634,1sleep130-21swapper/1319:07:325
175904923634,1sleep60-21swapper/619:05:3312
1759943993535,0cyclictest0-21swapper/700:25:4113
175917323533,1sleep50-21swapper/519:07:0811
1759959993433,1cyclictest1813486-21kworker/u32:2+events_unbound20:20:205
175909523432,1sleep80-21swapper/819:06:0714
1759959993332,1cyclictest477704-21thunderbird23:03:065
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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