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2025-04-02 - 05:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot5s.osadl.org (updated Wed Apr 02, 2025 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
366899280,27cyclictest25604-21sh19:55:002
366899280,22cyclictest1377-21apt-get21:27:002
366399250,1cyclictest6167-21munin-run00:20:011
367099240,23cyclictest5922-21awk23:00:003
366899240,23cyclictest334-21cron20:10:002
365999240,1cyclictest593-21dbus-daemon19:20:000
3670992319,3cyclictest23780-21awk21:05:013
367099230,1cyclictest30236-21mandb00:00:003
3668992320,3cyclictest0-21swapper/222:27:002
3668992320,3cyclictest0-21swapper/221:42:012
3668992319,3cyclictest14372-21apt-get23:20:022
3668992317,5cyclictest14210-21munin-plugin-st20:45:002
3663992321,1cyclictest11138-21dump-pmu-power20:35:001
366399230,2cyclictest10951-21munin-plugin-st00:30:001
366399230,1cyclictest19646-21irqstats19:42:071
3659992323,0cyclictest0-21swapper/020:02:060
3659992320,2cyclictest3504-21apt00:12:020
365999230,22cyclictest27771-21apt-get22:32:000
365999230,22cyclictest18432-21perf19:40:000
365999230,22cyclictest0-21swapper/021:27:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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