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2026-05-26 - 21:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot3s.osadl.org (updated Tue May 26, 2026 12:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
318744991171,90cyclictest0-21swapper/008:35:010
318744999186,3cyclictest150-21pr/ttyS207:40:010
318751998029,14cyclictest410538-21ssh12:06:371
318751998029,14cyclictest410538-21ssh12:06:371
318751997828,14cyclictest335902-21sh09:32:351
318751997826,15cyclictest354133-21sed10:10:021
318751997824,21cyclictest418919-21ssh12:24:111
318751997725,15cyclictest364-21snmpd09:18:431
318744997773,2cyclictest0-21swapper/007:50:010
318757997610,33cyclictest358951-21ssh10:20:023
318751997625,19cyclictest345676-21ssh09:52:501
318751997623,15cyclictest326240-21ssh09:12:301
318751997623,14cyclictest330708-21ssh09:21:441
318751997621,18cyclictest363969-21ssh10:30:201
318751997620,15cyclictest357010-21ssh10:16:091
318751997524,15cyclictest422559-21ssh12:31:321
318751997523,15cyclictest363423-21ssh10:29:341
318751997432,12cyclictest0-21swapper/112:40:001
318751997421,17cyclictest343903-21ssh09:49:111
318751997421,15cyclictest384064-21ssh11:12:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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