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2025-11-01 - 17:43

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 50 highest latencies:
System rackeslot5s.osadl.org (updated Sat Nov 01, 2025 12:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2154899241,21cyclictest313-21systemd-journal11:15:003
2154899240,23cyclictest0-21swapper/307:50:223
21548992321,1cyclictest0-21swapper/311:25:003
21548992320,2cyclictest22576-21latency_hist09:25:003
21543992320,2cyclictest22579-21munin-plugin-st09:25:002
2154399230,22cyclictest10844-21sh07:55:002
21538992321,1cyclictest0-21swapper/110:09:591
2153899230,2cyclictest1127-21latency_hist07:35:011
2153899230,22cyclictest2949-21perf08:45:001
2153899230,22cyclictest0-21swapper/107:25:211
2153899230,1cyclictest5870-21apt-get12:10:221
21535992323,0cyclictest0-21swapper/009:55:230
21535992321,1cyclictest0-21swapper/011:55:000
2153599231,21cyclictest28366-21apt-get08:30:210
2153599230,2cyclictest19999-21dump-pmu-power12:40:000
2153599230,22cyclictest15909-21basename11:25:000
21548992220,1cyclictest15480-21apt-get12:30:233
21548992220,1cyclictest10390-21perf12:20:013
2154899220,21cyclictest735-21sh12:00:003
2154899220,21cyclictest593-21dbus-daemon08:44:593
2154899220,21cyclictest15191-21apt12:30:013
2154899220,21cyclictest12196-21cron10:10:003
2154899220,21cyclictest0-21swapper/307:25:203
2154899220,1cyclictest31790-21apt-get10:50:223
21543992220,1cyclictest20723-21munin-plugin-st11:35:012
2154399220,21cyclictest596-21in:imuxsock12:39:592
2154399220,21cyclictest23571-21apt-get08:20:212
2154399220,21cyclictest11534-21apt-get07:55:222
2154399220,21cyclictest10109-21apt-get10:05:232
2154399220,21cyclictest0-21swapper/211:29:592
2154399220,1cyclictest13953-21apt-get08:00:202
2154399220,1cyclictest0-21swapper/210:29:592
21538992220,1cyclictest612-21gdbus11:00:001
21538992220,1cyclictest23282-21perf08:20:011
2153899220,21cyclictest30475-21turbostat08:35:001
2153899220,21cyclictest18437-21cron08:10:001
2153899220,21cyclictest0-21swapper/112:30:221
2153899220,21cyclictest0-21swapper/112:15:201
2153899220,21cyclictest0-21swapper/108:55:021
2153899220,21cyclictest0-21swapper/108:55:021
2153899220,1cyclictest6343-21apt-get07:45:191
2153899220,1cyclictest10833-21apt-get09:00:221
2153899220,1cyclictest0-21swapper/109:15:001
2153899220,0cyclictest0-21swapper/109:55:241
21535992222,0cyclictest0-21swapper/010:45:250
21535992219,2cyclictest17031-21basename10:20:000
2153599220,21cyclictest0-21swapper/010:50:210
2153599220,21cyclictest0-21swapper/010:35:210
2153599220,21cyclictest0-21swapper/010:30:200
2153599220,21cyclictest0-21swapper/009:15:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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