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2025-10-14 - 07:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack3slot6s.osadl.org (updated Tue Oct 14, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10658211597,12sleep10-21swapper/119:09:081
10532210897,6sleep00-21swapper/019:07:310
10402210897,6sleep20-21swapper/219:05:522
10508210488,11sleep30-21swapper/319:07:143
163332750,0sleep20-21swapper/221:35:252
274642730,1sleep3381ktimersoftd/300:00:163
6292630,1sleep20-21swapper/223:32:532
1075599370,2cyclictest0-21swapper/220:30:122
117702280,0sleep10-21swapper/100:17:061
25432260,1sleep20-21swapper/221:21:302
1075399243,19cyclictest0-21swapper/021:00:080
62552210,0sleep30-21swapper/322:31:373
10754992017,2cyclictest28206-21kworker/u8:200:03:041
10753991916,2cyclictest28206-21kworker/u8:223:31:030
10756991815,2cyclictest7708-21kworker/u8:000:28:043
10756991815,2cyclictest5719-21kworker/u8:223:07:043
1075599180,16cyclictest0-21swapper/219:50:162
10754991815,2cyclictest7708-21kworker/u8:000:14:041
10756991713,3cyclictest7708-21kworker/u8:000:31:043
10754991714,2cyclictest16285-21kworker/u8:022:37:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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