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2026-06-29 - 20:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Mon Jun 29, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28954993021,4cyclictest23070-21diskmemload11:15:312
2895499280,24cyclictest0-21swapper/209:18:332
28954992622,3cyclictest7898-21apt-get08:40:022
28954992621,4cyclictest7724-21ssh10:49:542
2895499260,25cyclictest0-21swapper/211:13:052
2895499260,1cyclictest0-21swapper/211:28:262
2895499260,1cyclictest0-21swapper/210:25:082
2895599250,24cyclictest25544-21ssh12:01:083
28954992522,3cyclictest0-21swapper/212:01:432
28954992522,3cyclictest0-21swapper/210:55:512
28954992520,4cyclictest17606-21ssh09:33:002
28954992520,4cyclictest0-21swapper/209:49:402
28954992518,6cyclictest31931-21grep12:35:592
2895499250,24cyclictest0-21swapper/211:46:222
2895499250,24cyclictest0-21swapper/209:20:592
2895399251,23cyclictest20847-21mii-tool11:00:561
2895399250,24cyclictest23070-21diskmemload10:55:101
2895399250,24cyclictest13097-21apt-get08:50:021
2895399250,24cyclictest0-21swapper/111:45:561
28952992523,1cyclictest24831-21munin-plugin-st12:30:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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