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2026-09-22 - 13:54

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 Tue Sep 22, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2518199280,1cyclictest0-21swapper/300:12:213
2518199270,23cyclictest19233-21diskmemload22:35:093
2518199270,21cyclictest0-21swapper/321:42:543
2518199263,22cyclictest11931-21cron19:50:003
25181992623,3cyclictest0-21swapper/322:01:533
2518199260,25cyclictest29097-21ssh21:47:533
2518199260,25cyclictest19394-21ssh00:32:183
2518199260,1cyclictest2500-21perl23:47:553
2518099260,22cyclictest151rcu_preempt23:58:502
25179992624,1cyclictest0-21swapper/122:23:011
25181992523,1cyclictest13207-21dump-pmu-power22:30:013
25181992520,4cyclictest5125-21sh21:26:093
2518199250,24cyclictest31899-21sh23:44:463
2518199250,24cyclictest16297-21ssh23:02:553
2518199250,24cyclictest16297-21ssh23:02:553
2518199250,24cyclictest0-21swapper/300:29:213
2518199250,21cyclictest0-21swapper/323:30:443
2518199250,1cyclictest6724-21sh00:20:143
2518199250,1cyclictest12086-21ssh23:27:453
2517999250,24cyclictest0-21swapper/120:12:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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