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2025-12-11 - 19:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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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 10 highest latencies:
System rackeslot4s.osadl.org (updated Thu Dec 11, 2025 12:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1754151994238,3cyclictest1968087-21kworker/u8:1+flush-259:010:50:152
1754155994137,3cyclictest2076964-21/usr/sbin/munin12:20:143
1754151994037,2cyclictest1748957-21kworker/u8:4+flush-259:007:40:012
1754151993929,9cyclictest1895097-21kworker/u8:2+flush-259:010:00:012
1754147993936,2cyclictest1968087-21kworker/u8:1+events_unbound11:05:151
1754155993835,2cyclictest1843089-21kworker/u8:1+flush-259:009:25:173
1754151993734,2cyclictest2004363-21kworker/u8:4+events_unbound11:25:002
1754151993734,2cyclictest1791286-21kworker/u8:1+events_unbound08:10:232
1754151993633,2cyclictest2028892-21kworker/u8:0+events_unbound12:20:202
1754151993633,2cyclictest2028892-21kworker/u8:0+events_unbound11:40:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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