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2025-11-04 - 02:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 rackeslot6s.osadl.org (updated Mon Nov 03, 2025 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2304266996616,26cyclictest0-21swapper/007:30:010
2304266996225,31cyclictest2323405-21/usr/sbin/munin08:55:290
2304266996225,31cyclictest2323405-21/usr/sbin/munin08:55:290
2304270996141,11cyclictest0-21swapper/209:04:592
2304266996038,15cyclictest0-21swapper/009:55:140
2304266995915,16cyclictest2350239-21apt-key11:35:020
2304266995827,5cyclictest2344985-21users11:00:310
2304266995827,5cyclictest2344985-21users11:00:300
2304268995713,21cyclictest2355473-21gpgv12:05:011
2304266995735,15cyclictest0-21swapper/008:35:160
2304266995735,15cyclictest0-21swapper/008:35:160
2304266995721,9cyclictest2335275-21unixbench_multi10:05:290
2304266995719,3cyclictest2311564-21apt-get07:50:130
2304266995636,12cyclictest0-21swapper/007:35:140
2304266995632,13cyclictest0-21swapper/010:40:180
2304266995617,9cyclictest2325589-21sh09:10:230
2304266995520,28cyclictest2316120-21/usr/sbin/munin08:15:220
2304266995434,14cyclictest0-21swapper/007:15:120
2304266995426,3cyclictest2327269-21ssh09:20:210
2304266995417,3cyclictest0-21swapper/009:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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