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2026-03-28 - 21:50

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 Sat Mar 28, 2026 12:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3058999591,46cyclictest30428-21ssh11:40:131
3058199533,36cyclictest20629-21ssh09:30:130
3058999512,39cyclictest1496-21ssh09:55:111
3058999503,29cyclictest17478-21ssh11:15:141
3058999503,29cyclictest17478-21ssh11:15:141
3059799478,9cyclictest131rcu_preempt12:10:112
3058999472,30cyclictest8359-21ssh11:10:131
3058999472,30cyclictest8359-21ssh11:10:131
3060599463,28cyclictest28366irq/58-eth010:35:123
30605994622,13cyclictest28366irq/58-eth009:15:143
3058199460,40cyclictest3098-21apt-get07:15:120
3059799454,21cyclictest24154-21ssh12:30:142
3059799440,34cyclictest0-21swapper/210:40:132
30589994423,15cyclictest21-21ksoftirqd/112:05:131
3058199444,13cyclictest131rcu_preempt09:40:130
3058199442,38cyclictest23680-21apt-get10:25:120
3058199441,33cyclictest22452-21sh09:11:450
3058199440,24cyclictest8952-21ssh10:34:560
3058199432,37cyclictest22358-21apt-get07:35:120
3058199431,33cyclictest16177-21diskmemload11:53:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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