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2025-11-03 - 11:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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 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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot3s.osadl.org (updated Mon Nov 03, 2025 00:45:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1408032999267,20cyclictest30-21ksoftirqd/223:45:012
1408029996858,7cyclictest23-21ksoftirqd/100:35:011
140802599660,38cyclictest0-21swapper/019:46:500
1408035996417,13cyclictest1415572-21cat21:35:023
1408025996314,8cyclictest12-21ksoftirqd/019:45:010
1408025995815,8cyclictest12-21ksoftirqd/023:20:010
1408035995734,19cyclictest1414997-21munin-run21:25:003
140803299561,51cyclictest235-21systemd-journal20:30:012
1408029995636,16cyclictest272-21dbus-daemon00:15:011
1408035995536,15cyclictest1424331-21sshd00:23:193
1408035995536,14cyclictest1-21systemd00:35:003
1408035995535,16cyclictest1423053-40mandb00:00:053
1408032995537,14cyclictest235-21systemd-journal21:50:012
140802999556,8cyclictest23-21ksoftirqd/119:40:011
140802999556,10cyclictest23-21ksoftirqd/120:10:011
140802999556,10cyclictest23-21ksoftirqd/120:10:011
1408025995533,16cyclictest235-21systemd-journal20:15:000
140802599552,37cyclictest12-21ksoftirqd/019:36:180
1408035995439,11cyclictest1420166-21sshd23:04:193
1408035995339,10cyclictest1419116-21sshd22:41:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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