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2025-12-15 - 17:07

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 Mon Dec 15, 2025 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2842499260,25cyclictest18893-21apt-get11:19:260
2842899250,24cyclictest0-21swapper/112:34:261
2843499240,23cyclictest24951-21dump-pmu-power08:10:013
2843099241,22cyclictest606-21dbus-daemon09:00:012
2842499240,23cyclictest17245-21apt10:09:260
28434992321,1cyclictest1647-21apt-get10:44:263
28434992320,2cyclictest3188-21dump-pmu-power07:25:013
2843099230,23cyclictest0-21swapper/207:14:242
2843099230,22cyclictest29760-21munin-run08:20:002
2843099230,22cyclictest2694-21basename11:50:002
28428992323,0cyclictest0-21swapper/111:19:261
28428992321,1cyclictest22540-21latency_hist08:05:011
2842899230,22cyclictest27191-21cron12:40:001
28424992322,1cyclictest0-21swapper/011:49:270
28424992321,1cyclictest5863-21munin-run10:50:000
28424992320,2cyclictest15435-21awk11:10:010
28424992320,1cyclictest313-21systemd-journal10:25:010
2842499230,22cyclictest7907-21latency_hist12:00:010
2842499230,22cyclictest29808-21perf09:25:010
28434992220,1cyclictest606-21dbus-daemon11:15:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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