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2025-12-07 - 08:02

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 50 highest latencies:
System rackeslot3s.osadl.org (updated Sun Dec 07, 2025 00:45:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
142193299941,61cyclictest1427955-21cat21:05:010
1421932997771,3cyclictest0-21swapper/022:25:010
142193799711,46cyclictest1436962-40gzip00:00:042
1421934996910,11cyclictest23-21ksoftirqd/123:20:021
142193299681,6cyclictest1437009-21sed00:00:020
142193299671,2cyclictest0-21swapper/020:24:590
142193299662,33cyclictest1430937-21sshd22:01:420
142193299661,38cyclictest363-21snmpd22:37:230
142193299652,33cyclictest1424729-21munin-run20:05:010
142193299651,59cyclictest1426061-21latency_hist20:30:020
1421932996426,34cyclictest12-21ksoftirqd/023:15:020
142193299641,58cyclictest1437273-21latency_hist00:05:010
1421932996326,31cyclictest306-21in:imuxsock20:39:590
1421932996217,40cyclictest16850irq/134-800000021:51:430
142193299621,2cyclictest0-21swapper/020:15:020
1421934996115,9cyclictest23-21ksoftirqd/119:10:011
142193299612,54cyclictest1428065-21sshd21:06:430
142193299611,56cyclictest16950irq/224-800000020:41:340
142193299603,51cyclictest1424499-21grep20:00:010
1421934995916,11cyclictest23-21ksoftirqd/121:10:011
1421932995950,2cyclictest0-21swapper/023:00:020
1421934995813,8cyclictest23-21ksoftirqd/121:25:001
142193299583,50cyclictest1-21systemd19:55:010
142193299583,49cyclictest1-21systemd19:30:010
142193299572,50cyclictest1429637-21sshd21:39:430
142193299571,5cyclictest0-21swapper/020:20:010
142193299571,51cyclictest1429165-21unin-run21:30:000
142193299571,2cyclictest0-21swapper/022:10:020
142193799561,22cyclictest1423359-21cat19:35:032
1421934995637,14cyclictest1-21systemd19:45:011
142193299564,47cyclictest1432521-21munin-run22:35:000
142193299563,48cyclictest1434860-21munin-run23:20:010
142193299562,50cyclictest1435819-21cat23:35:030
142193299561,50cyclictest1438272-21sh00:25:010
142193299561,50cyclictest1438272-21sh00:25:010
142193299552,48cyclictest1437461-21cron00:10:000
1421932995510,37cyclictest0-21swapper/019:45:000
1421934995414,8cyclictest23-21ksoftirqd/121:15:001
142193299542,47cyclictest1438799-21unin-run00:35:010
142193299542,47cyclictest1438799-21unin-run00:35:010
142193299542,46cyclictest272-21dbus-daemon19:20:000
142193299542,46cyclictest1433285-21sshd22:48:440
142193299541,47cyclictest48-21kcompactd022:16:290
1421942995335,13cyclictest1-21systemd23:15:003
1421934995315,7cyclictest0-21swapper/121:56:421
142193299532,47cyclictest1424962-21sshd20:09:430
142193299532,46cyclictest1435393-21munin-run23:30:010
142193299532,45cyclictest1-21systemd21:35:010
142193299531,47cyclictest1426291-21munin-run20:35:020
1421932995311,38cyclictest1439194-21sed00:40:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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