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2025-11-20 - 08:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.

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 rack2slot7s.osadl.org (updated Thu Nov 20, 2025 00:39:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2515669995145,3cyclictest0-21swapper/123:45:011
251566999495,39cyclictest2577654-21ssh21:59:201
2515669994939,7cyclictest1-21systemd23:35:021
251566999493,36cyclictest2687841-21ssh00:29:171
2515670994842,3cyclictest0-21swapper/220:20:012
2515668994729,14cyclictest0-21swapper/022:54:180
2515669994536,5cyclictest2695668-21systemd-run00:40:011
2515669994533,7cyclictest2691219-21ssh00:34:161
2515668994537,5cyclictest2541641-21diskmemload23:04:150
2515668994537,5cyclictest2541641-21diskmemload23:04:150
2515669994436,4cyclictest2532653-21sendmail20:40:011
2515669994435,6cyclictest2517201-21latency_hist19:40:011
2515669994435,6cyclictest2517201-21latency_hist19:40:011
2515668994436,5cyclictest2545673-21ssh21:15:010
251566899441,37cyclictest2613938-21ssh22:49:120
2515670994337,3cyclictest0-21swapper/200:30:012
2515670994336,4cyclictest2666914-21munin-run00:00:012
2515669994234,5cyclictest2540141-21cron21:05:011
251566999421,35cyclictest2570249-21ssh21:49:081
2515668994231,8cyclictest2686793-21sshd00:28:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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