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2025-12-16 - 18:59

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 Dec 12, 2025 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
746499736,20cyclictest21-21ksoftirqd/122:45:131
747399514,42cyclictest0-21swapper/221:10:142
747399502,15cyclictest0-21swapper/221:40:122
745399505,41cyclictest1801-21ssh21:35:100
746499491,14cyclictest21-21ksoftirqd/100:35:171
747399482,41cyclictest24613-21ssh22:30:162
747399482,13cyclictest9496-21ssh22:00:132
745399484,7cyclictest131rcu_preempt22:45:120
7453994810,24cyclictest131rcu_preempt19:25:120
745399472,35cyclictest26358-21ssh21:10:130
7453994522,15cyclictest629-21Async14:00:480
745399442,6cyclictest131rcu_preempt00:15:160
746499431,12cyclictest21-21ksoftirqd/122:25:141
745399422,30cyclictest0-21swapper/020:20:150
745399421,28cyclictest14073-21ssh00:25:180
746499411,30cyclictest8003-21ssh22:40:131
745399412,29cyclictest21895-21ssh00:30:150
745399411,24cyclictest15457-21ssh00:05:150
747399392,6cyclictest0-21swapper/221:47:542
747399392,29cyclictest16029-21ssh23:05:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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