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2025-08-30 - 00:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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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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 rackeslot3s.osadl.org (updated Fri Aug 29, 2025 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16740079910298,2cyclictest0-21swapper/008:45:020
1674012998575,7cyclictest23-21ksoftirqd/108:05:021
1674007998276,2cyclictest0-21swapper/007:15:030
1674012996521,40cyclictest1680737-21sshd09:19:411
1674012996518,42cyclictest235-21systemd-journal10:35:261
167401299641,15cyclictest1681035-21munin-run09:25:001
167401299632,16cyclictest1689848-21munin-run12:15:011
167401299632,15cyclictest1685183-21munin-run10:45:011
167401299632,15cyclictest1685183-21munin-run10:45:011
167401299632,14cyclictest1683608-21munin-run10:15:011
167401299632,13cyclictest1689091-21munin-run12:00:011
167401299631,9cyclictest1686960-21sshd11:18:401
167401299631,14cyclictest1677081-21sshd08:05:421
167401299613,7cyclictest1679207-21munin-run08:50:011
167401299613,14cyclictest1680236-21munin-run09:10:001
167401299612,7cyclictest1677332-21sshd08:10:401
167401299612,6cyclictest1683370-21munin-run10:10:011
167401299612,5cyclictest1690103-21munin-run12:20:011
167401299612,5cyclictest1684164-21munin-run10:25:011
167401299612,15cyclictest1684650-21munin-run10:35:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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