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2026-05-28 - 17:04

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 Thu May 28, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
102097425148,2sleep80-21swapper/819:05:0214
102416825047,2sleep150-21swapper/1519:06:147
102448924745,1sleep40-21swapper/419:09:4710
1024935994620,16cyclictest1774-21snmpd19:40:2213
102362524644,1sleep130-21swapper/1319:05:235
102342324239,2sleep120-21swapper/1219:05:224
102418924034,1sleep70-21swapper/719:06:2213
102442923937,1sleep60-21swapper/619:09:0112
102432223836,1sleep110-21swapper/1119:07:453
102432923734,2sleep10-21swapper/119:07:521
102411523734,2sleep90-21swapper/919:05:3515
102098123735,1sleep140-21swapper/1419:05:086
102492999360,35cyclictest1373688-21ssh00:20:1411
102424323634,1sleep50-21swapper/519:06:5211
1024959993535,0cyclictest0-21swapper/1522:13:197
1024920993534,1cyclictest2779210-21thunderbird23:17:498
1024920993534,1cyclictest2779210-21thunderbird22:34:278
1024920993534,1cyclictest2779210-21thunderbird21:41:378
1024920993533,2cyclictest2779210-21thunderbird00:05:018
1024920993531,3cyclictest1225554-21ssh22:25:148
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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