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2024-11-23 - 17:17

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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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 rackeslot3s.osadl.org (updated Sat Nov 23, 2024 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
544692991241,101cyclictest0-21swapper/011:55:020
544695997528,12cyclictest1-21systemd08:10:011
54469299744,6cyclictest555796-21cat10:40:030
54470399681,57cyclictest341irq_work/309:05:023
544695996529,10cyclictest550880-21systemd-run09:10:001
544695996519,10cyclictest0-21swapper/108:49:591
54470399628,33cyclictest560787-21modprobe12:20:003
544703996139,17cyclictest1-21systemd10:30:013
544703996139,17cyclictest1-21systemd10:30:013
544703996135,16cyclictest235-21systemd-journal08:55:003
544703996038,14cyclictest550867-21cron09:10:013
544703995940,16cyclictest37-21ksoftirqd/307:25:003
544703995814,27cyclictest551383-21modprobe09:20:003
544703995635,14cyclictest545153-21systemctl07:19:593
544703995536,13cyclictest37-21ksoftirqd/309:00:013
544703995536,13cyclictest37-21ksoftirqd/309:00:003
54469999544,4cyclictest131rcu_preempt08:25:012
54469299545,44cyclictest131rcu_preempt11:35:020
544703995339,11cyclictest37-21ksoftirqd/310:40:023
544703995235,13cyclictest1-21systemd08:20:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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