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2026-05-14 - 14:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot6s.osadl.org (updated Thu May 14, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38392742251245,4sleep60-21swapper/619:07:2316
38394002243235,5sleep50-21swapper/519:08:4315
38362092241221,12sleep140-21swapper/1419:05:116
38394202239231,5sleep10-21swapper/119:08:591
38392332231211,12sleep150-21swapper/1519:06:527
38394072229210,12sleep100-21swapper/1019:08:482
38394492228215,8sleep20-21swapper/219:09:2012
38394162228208,12sleep190-21swapper/1919:08:5711
38394422227208,12sleep160-21swapper/1619:09:148
38392712226218,5sleep30-21swapper/319:07:2013
38391772226207,12sleep130-21swapper/1319:06:105
38391752226207,12sleep110-21swapper/1119:06:083
38393802221201,12sleep120-21swapper/1219:08:304
38392372221202,12sleep180-21swapper/1819:06:5510
38358772219199,12sleep40-21swapper/419:05:0114
38394992218211,4sleep80-21swapper/819:09:4618
38393412217199,11sleep70-21swapper/719:08:0417
38362042217196,13sleep90-21swapper/919:05:0619
38392862212193,12sleep170-21swapper/1719:07:349
38394182202183,12sleep00-21swapper/019:08:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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