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2026-09-17 - 00:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #3

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 rack1slot3s.osadl.org (updated Wed Sep 16, 2026 12:43:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
57799214145,33mali-event-hand0-21swapper/107:10:181
228859995619,4cyclictest0-21swapper/309:32:093
228859995619,4cyclictest0-21swapper/309:32:093
22885999561,18cyclictest337131-21ssh11:05:123
22885999552,17cyclictest309070-21ssh10:16:433
22885999552,16cyclictest378887-21ntp_states12:17:103
22885999552,16cyclictest300034-21ssh10:01:183
22885999551,17cyclictest514-21weston07:57:323
22885999551,17cyclictest514-21weston07:57:323
22885999551,16cyclictest373753-21ssh12:07:263
22885999542,16cyclictest308736-21ssh10:16:343
228859995416,12cyclictest243552-21cut07:51:543
22885999541,17cyclictest375986-21ntpq12:12:053
22885999541,17cyclictest290416-21ssh09:42:313
22885999541,17cyclictest290416-21ssh09:42:313
22885999541,16cyclictest77-21kcompactd010:07:493
22885999532,17cyclictest382433-21ssh12:22:383
22885999532,16cyclictest313999-21ssh10:24:403
228859995314,4cyclictest282647-21latency_hist09:31:343
22885999531,18cyclictest367266-21ntpq11:57:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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