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2026-03-07 - 12:02

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 20 highest latencies:
System rack7slot4s.osadl.org (updated Fri Mar 06, 2026 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1284699593,44cyclictest2997-21ssh09:30:130
1286499482,27cyclictest17452-21ssh09:20:132
1286499462,37cyclictest15152-21ssh09:55:122
1285699463,36cyclictest29800-21ssh09:45:121
1284699462,33cyclictest3093-21ssh11:55:120
1287799453,12cyclictest28366irq/58-eth010:25:133
1285699451,31cyclictest7398-21ssh10:45:111
12877994425,14cyclictest28366irq/58-eth011:50:133
1286499442,25cyclictest19707-21ssh11:10:132
1287799433,25cyclictest28366irq/58-eth009:15:143
1287799433,25cyclictest28366irq/58-eth009:15:133
1287799431,12cyclictest28366irq/58-eth010:10:103
1284699438,23cyclictest12-21ksoftirqd/007:35:140
1284699431,33cyclictest31987-21ssh09:10:140
1287799416,22cyclictest28366irq/58-eth012:15:133
1286499398,22cyclictest12837-21cyclictest10:15:112
12864993818,5cyclictest0-21swapper/212:35:132
12864993818,5cyclictest0-21swapper/212:35:122
1285699381,6cyclictest131rcu_preempt11:50:121
1284699382,20cyclictest28723-21ssh11:15:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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