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2025-07-03 - 08:55

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 Jul 03, 2025 00:44:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1735096994541,3cyclictest1911715-21kworker/u8:1+events_unbound22:10:162
1735088994137,3cyclictest1906245-21gpgv22:00:010
1735096994034,4cyclictest3754036-21systemd-journal19:50:002
1735088994034,4cyclictest1813285-21latency_hist20:30:010
1735098993734,2cyclictest1859734-21kworker/u8:3+flush-259:022:09:593
1735088993734,2cyclictest1917093-21apt-get22:10:120
1735093993625,9cyclictest1963378-21/usr/sbin/munin22:55:181
1735098993531,3cyclictest1932274-21kworker/u8:0+flush-259:023:10:003
1735096993532,2cyclictest1776859-21kworker/u8:1+events_unbound20:20:002
1735088993530,3cyclictest1787354-21/usr/sbin/munin20:05:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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