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2026-09-18 - 10:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 50 highest latencies:
System rack7slot4s.osadl.org (updated Fri Sep 18, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12664996540,17cyclictest35966irq/58-eth021:15:123
1264699591,47cyclictest21081-21ssh23:45:121
1265699561,3cyclictest0-21swapper/221:45:132
1265699561,3cyclictest0-21swapper/220:15:142
1265699554,42cyclictest18243-21ssh22:50:142
1265699554,42cyclictest18243-21ssh22:50:132
1265699501,43cyclictest10741-21ssh00:15:122
1265699491,2cyclictest0-21swapper/220:05:132
1265699471,2cyclictest0-21swapper/222:55:142
1264699451,20cyclictest769-21apt-get20:05:121
1265699431,3cyclictest0-21swapper/220:55:132
1264699430,35cyclictest6793-21ssh23:55:131
1265699420,2cyclictest0-21swapper/220:50:122
1265699411,3cyclictest11951-21apt-get23:40:142
1265699410,2cyclictest0-21swapper/200:05:142
1265699401,2cyclictest9173-21apt-get22:45:132
1265699400,9cyclictest29501-21ntpq21:05:252
1265699400,2cyclictest0-21swapper/220:25:122
1266499391,34cyclictest0-21swapper/322:45:153
1266499391,34cyclictest0-21swapper/321:35:123
1265699392,1cyclictest0-21swapper/200:35:132
1265699391,3cyclictest0-21swapper/220:35:142
1265699391,3cyclictest0-21swapper/200:00:142
1265699391,2cyclictest0-21swapper/223:25:112
1265699391,2cyclictest0-21swapper/222:05:132
1265699381,6cyclictest0-21swapper/219:40:122
1265699381,3cyclictest0-21swapper/221:15:122
1265699381,2cyclictest0-21swapper/220:00:112
1265699381,2cyclictest0-21swapper/200:20:142
1264699382,5cyclictest0-21swapper/123:07:581
1266499373,29cyclictest35966irq/58-eth000:15:133
1266499371,2cyclictest0-21swapper/321:40:133
1265699371,33cyclictest14547-21head22:10:292
1265699371,32cyclictest0-21swapper/221:25:132
1265699371,2cyclictest0-21swapper/223:55:122
1265699371,2cyclictest0-21swapper/222:20:132
1265699371,2cyclictest0-21swapper/219:20:122
1265699370,2cyclictest27346irq/40-dwc2_hso19:55:122
1265699370,2cyclictest0-21swapper/222:40:152
1264699371,7cyclictest28820-21sed20:00:181
1266499361,29cyclictest0-21swapper/323:35:123
1265699366,23cyclictest17003-21/usr/sbin/munin23:05:272
1265699361,3cyclictest0-21swapper/221:40:142
1265699361,31cyclictest1042-21ls22:05:012
1265699361,2cyclictest0-21swapper/219:25:132
1265699361,2cyclictest0-21swapper/219:25:122
1265699360,2cyclictest30162-21ssh23:50:152
1265699360,2cyclictest0-21swapper/223:35:102
1265699360,2cyclictest0-21swapper/223:10:122
1264699368,19cyclictest21-21ksoftirqd/123:20:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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