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2026-06-02 - 09:59

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.
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 rack2slot7s.osadl.org (updated Tue Jun 02, 2026 00:42:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1381413995343,6cyclictest1535317-21latency_hist00:15:012
1381413995343,6cyclictest1535317-21latency_hist00:15:012
1381412995126,22cyclictest1484291-21cron22:55:011
1381412995034,13cyclictest0-21swapper/122:01:001
1381412994925,20cyclictest0-21swapper/121:26:051
1381412994925,20cyclictest0-21swapper/121:26:051
138141299482,14cyclictest1472844-21sh22:36:031
1381411994820,20cyclictest12350irq/32-eth023:01:010
1381412994739,5cyclictest1477986-21systemd-run22:45:011
1381412994730,14cyclictest1467048-21grep22:26:151
1381413994639,3cyclictest0-21swapper/223:10:022
1381412994636,3cyclictest0-21swapper/100:16:071
138141299463,11cyclictest1431480-21ssh21:31:051
138141299463,11cyclictest1431480-21ssh21:31:051
1381412994619,24cyclictest1-21systemd21:55:011
1381411994638,5cyclictest1-21systemd00:15:010
1381411994638,5cyclictest1-21systemd00:15:010
1381413994536,5cyclictest0-21swapper/223:11:062
1381413994536,5cyclictest0-21swapper/223:11:062
138141299454,8cyclictest1401758-21ntpq20:16:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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