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2025-11-24 - 05:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 rack1slot2s.osadl.org (updated Mon Nov 24, 2025 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3050829590,0sleep00-21swapper/018:38:450
2962327874,0sleep10-21swapper/118:34:531
3041423632,0sleep20-21swapper/218:37:392
3029723627,0sleep30-21swapper/318:36:203
30650991313,0cyclictest18065-21sensors23:09:552
35160,0ktimersoftd/30-21swapper/323:23:553
339960,0migration/35280-21fschecks_time20:44:463
339960,0migration/33877-21sh21:21:343
339960,0migration/327064-21sh22:15:083
339960,0migration/320171-21sh22:13:163
339960,0migration/313929-21sh20:49:493
339960,0migration/312235-21sh21:48:003
339960,0migration/312235-21sh21:48:003
339960,0migration/311251-21sh23:27:513
339960,0migration/310172-21sh00:07:173
306499965,0cyclictest30632-21kworker/1:122:01:261
306499965,0cyclictest30632-21kworker/1:121:48:041
306499965,0cyclictest30632-21kworker/1:121:48:041
306499965,0cyclictest30632-21kworker/1:121:38:321
306499965,0cyclictest30632-21kworker/1:121:10:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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