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2025-12-24 - 09:15

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 Wed Dec 24, 2025 00:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1403113997928,10cyclictest1406952-21munin-run20:25:000
140311399712,35cyclictest1408697-21modprobe20:55:030
140311399712,35cyclictest1408697-21modprobe20:55:020
1403125996813,12cyclictest275-21dbus-daemon22:10:012
140311399681,38cyclictest1418225-21sed00:00:030
1403128996213,8cyclictest37-21ksoftirqd/320:05:013
1403125996217,11cyclictest30-21ksoftirqd/223:40:022
1403125996213,8cyclictest30-21ksoftirqd/223:20:012
1403125996213,8cyclictest30-21ksoftirqd/223:20:002
1403113996136,4cyclictest16950irq/224-800000020:55:020
1403113996118,25cyclictest19350irq/34-mmc100:25:020
1403128996014,7cyclictest37-21ksoftirqd/322:50:023
1403128996013,9cyclictest37-21ksoftirqd/321:35:003
1403128996013,9cyclictest37-21ksoftirqd/321:35:003
1403128995817,12cyclictest37-21ksoftirqd/323:20:003
1403128995817,12cyclictest37-21ksoftirqd/323:20:003
1403128995810,13cyclictest37-21ksoftirqd/323:50:023
140312599586,9cyclictest30-21ksoftirqd/219:25:012
140312899578,10cyclictest37-21ksoftirqd/323:30:013
1403128995715,9cyclictest37-21ksoftirqd/320:00:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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