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2025-07-15 - 22:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 rack0slot6s.osadl.org (updated Tue Jul 15, 2025 00:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33250419911211,50cyclictest0-21swapper/221:15:0112
332504599710,26cyclictest0-21swapper/323:03:2013
3325073996722,44cyclictest115050irq/18-parport020:55:585
3325045996717,49cyclictest0-21swapper/320:13:5613
3325073996059,0cyclictest0-21swapper/1322:34:435
3325045995728,28cyclictest3448372-21StreamT~13
3325061995611,45cyclictest0-21swapper/900:30:0119
35865682530,0sleep120-21swapper/1223:31:294
332507399521,50cyclictest1431rcuc/1321:09:185
3325056995251,1cyclictest0-21swapper/722:34:4317
3325045995221,30cyclictest0-21swapper/320:07:1013
332504599520,22cyclictest0-21swapper/323:36:4513
3325073995132,19cyclictest0-21swapper/1322:50:185
3325073995125,25cyclictest0-21swapper/1319:39:005
3325073995120,30cyclictest0-21swapper/1320:43:005
3325073995119,31cyclictest0-21swapper/1319:59:105
3325073995118,33cyclictest0-21swapper/1322:17:515
3325073995117,33cyclictest0-21swapper/1321:21:195
3325073995117,33cyclictest0-21swapper/1300:19:465
332507399510,18cyclictest0-21swapper/1320:15:185
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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