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2025-09-03 - 21:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 rack7slot7s.osadl.org (updated Wed Sep 03, 2025 12:43:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19952210188,9sleep10-21swapper/107:08:001
1986729581,9sleep30-21swapper/307:06:553
1981428467,13sleep20-21swapper/207:06:132
1989928270,8sleep00-21swapper/007:07:190
57802460,0sleep10-21swapper/112:24:001
2019699280,28cyclictest0-21swapper/211:13:252
20196992624,1cyclictest2620-21memory11:40:182
2018499260,25cyclictest0-21swapper/009:58:080
20196992520,4cyclictest13735-21cpuspeed_turbos10:30:162
2020099220,19cyclictest0-21swapper/311:38:413
2018499210,20cyclictest0-21swapper/010:09:540
2019699205,12cyclictest13254-21diskmemload12:27:272
2019699200,20cyclictest0-21swapper/211:23:042
2019699200,20cyclictest0-21swapper/209:46:142
2019199201,16cyclictest0-21swapper/110:39:181
2020099193,10cyclictest0-21swapper/311:10:133
2018499190,15cyclictest0-21swapper/010:45:120
20196991816,2cyclictest37850irq/131-snd_hda10:05:142
20200991716,1cyclictest0-21swapper/310:40:173
2020099170,16cyclictest0-21swapper/311:28:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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