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2025-10-23 - 01:31

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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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.

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 rackeslot4s.osadl.org (updated Wed Oct 22, 2025 12:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1080708994136,3cyclictest1184168-21gpgv08:50:011
1080714993834,3cyclictest1070083-21kworker/u8:1+flush-259:007:35:003
1080708993629,5cyclictest2698871-21systemd-journal11:40:011
1080703993632,3cyclictest1122502-21kworker/u8:1+events_unbound08:55:030
1080714993531,3cyclictest1117158-21kworker/u8:0+flush-259:008:00:013
1080714993531,3cyclictest1117158-21kworker/u8:0+flush-259:008:00:013
1080708993528,5cyclictest1324132-21latency_hist11:05:011
1080703993227,3cyclictest1122502-21kworker/u8:1+events_unbound08:40:200
1080710993125,4cyclictest1365695-21apt-get11:45:002
1080710993027,2cyclictest1194981-21kworker/u8:4+events_unbound09:00:252
1080710993027,2cyclictest1122502-21kworker/u8:1+events_unbound08:50:192
1080710993026,3cyclictest1122502-21kworker/u8:1+events_unbound07:55:122
1080710993026,3cyclictest1122502-21kworker/u8:1+events_unbound07:55:112
1080708993024,4cyclictest1210252-21latency_hist09:15:011
1080708993020,9cyclictest1122502-21kworker/u8:1+flush-259:008:40:001
1080703993027,2cyclictest1313835-21kworker/u8:2+events_unbound10:55:220
1080703993026,3cyclictest75-21kswapd009:08:000
1080703993024,4cyclictest1355425-21latency_hist11:35:010
1080703992926,2cyclictest1251978-21kworker/u8:1+events_unbound10:00:180
1080703992926,2cyclictest1122502-21kworker/u8:1+flush-259:008:25:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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