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2026-01-02 - 18:06

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 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 100 highest latencies:
System rackeslot5s.osadl.org (updated Fri Jan 02, 2026 12:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2062799250,24cyclictest0-21swapper/011:31:010
20630992421,2cyclictest27174-21idleruntime-cro08:30:013
2062999240,23cyclictest0-21swapper/211:40:592
2062799240,23cyclictest22974-21apt11:40:000
20630992321,1cyclictest15255-21apt-get11:25:583
2063099230,22cyclictest4969-21grep12:10:013
20628992320,2cyclictest17565-21munin-plugin-st08:10:001
2062899230,22cyclictest10598-21/usr/sbin/munin07:55:561
20627992321,1cyclictest606-21dbus-daemon07:30:000
2062799230,23cyclictest0-21swapper/007:16:000
20630992220,1cyclictest28841-21awk09:40:013
2063099220,21cyclictest3446-21apt-get07:40:563
2063099220,21cyclictest20786-21apt-get11:35:023
20629992220,1cyclictest606-21dbus-daemon09:05:002
20629992220,1cyclictest2583-21munin-run12:05:012
20629992220,1cyclictest24788-21munin-run08:25:002
20629992220,1cyclictest0-21swapper/211:15:012
2062999220,21cyclictest9041-21apt-get10:05:022
2062999220,21cyclictest5088-21apt-get08:50:562
2062999220,21cyclictest22992-21sh07:15:012
2062999220,21cyclictest12532-21perf11:20:012
2062999220,21cyclictest0-21swapper/208:40:012
2062999220,21cyclictest0-21swapper/208:40:012
2062999220,21cyclictest0-21swapper/208:15:572
2062999220,1cyclictest15117-21awk08:05:012
20628992222,0cyclictest28542-21apt-get07:25:571
20628992221,1cyclictest0-21swapper/111:35:581
20628992220,1cyclictest23336-21apt-get07:16:001
20628992220,1cyclictest1983-21munin-run08:45:011
20628992220,1cyclictest0-21swapper/112:05:581
20628992220,1cyclictest0-21swapper/107:35:001
2062899220,21cyclictest7154-21perf08:55:011
2062899220,21cyclictest17139-21apt-get09:15:581
2062899220,21cyclictest0-21swapper/108:55:581
20627992220,1cyclictest0-21swapper/010:25:010
2062799220,21cyclictest0-21swapper/011:20:590
2062799220,21cyclictest0-21swapper/010:10:560
2062799220,1cyclictest3114-21munin-run07:40:010
2062799220,1cyclictest0-21swapper/010:55:000
20630992121,0cyclictest12501-21apt-get12:25:583
20630992121,0cyclictest0-21swapper/310:05:023
20630992120,1cyclictest5840-21apt-get07:45:573
20630992120,1cyclictest0-21swapper/309:30:593
2063099210,21cyclictest0-21swapper/307:20:593
2063099210,20cyclictest30858-21apt-get10:50:583
2063099210,20cyclictest26065-21apt-get10:40:573
2063099210,20cyclictest0-21swapper/310:30:583
2063099210,20cyclictest0-21swapper/307:10:573
2063099210,1cyclictest0-21swapper/310:20:013
2063099210,0cyclictest17362-21apt-get11:30:023
20629992120,1cyclictest913-21apt-get07:35:592
20629992120,1cyclictest14357-21grep09:10:002
20629992120,1cyclictest11590-21apt-get10:10:562
20629992120,0cyclictest31559-21apt-get09:45:562
20629992119,1cyclictest313-21systemd-journal11:00:002
2062999210,21cyclictest0-21swapper/208:30:582
2062999210,21cyclictest0-21swapper/207:40:572
2062999210,20cyclictest7688-21apt-get12:15:582
2062999210,20cyclictest21959-21apt-get09:25:582
2062999210,20cyclictest21959-21apt-get09:25:582
2062999210,20cyclictest0-21swapper/211:50:582
2062999210,20cyclictest0-21swapper/208:05:592
2062999210,0cyclictest0-21swapper/210:25:582
20628992121,0cyclictest18103-21apt11:31:011
20628992120,1cyclictest437-21cron10:55:001
20628992120,1cyclictest11001-21apt-get10:07:271
20628992120,1cyclictest0-21swapper/110:15:591
20628992120,1cyclictest0-21swapper/109:20:561
20628992120,0cyclictest14898-21apt-get12:30:581
20628992119,1cyclictest12159-21cron12:25:001
20628992119,1cyclictest1180-21sh09:50:001
2062899210,20cyclictest23006-21awk07:15:011
2062899210,20cyclictest0-21swapper/109:40:581
2062899210,20cyclictest0-21swapper/109:10:591
2062899210,20cyclictest0-21swapper/107:35:591
2062899210,0cyclictest13054-21apt-get08:01:031
2062899210,0cyclictest0-21swapper/111:10:581
2062899210,0cyclictest0-21swapper/107:45:571
20627992121,0cyclictest0-21swapper/012:01:000
20627992121,0cyclictest0-21swapper/010:25:580
20627992121,0cyclictest0-21swapper/007:40:570
20627992120,1cyclictest25102-21apt-get08:25:570
20627992119,1cyclictest553-21idleruntime-cro07:35:000
20627992119,1cyclictest313-21systemd-journal10:10:010
20627992119,1cyclictest1968-21apt-get08:45:010
2062799210,21cyclictest0-21swapper/012:30:580
2062799210,20cyclictest0-21swapper/009:40:570
2062799210,20cyclictest0-21swapper/008:50:560
2062799210,0cyclictest0-21swapper/012:35:580
20630992020,0cyclictest2692-21apt-get08:45:583
20630992020,0cyclictest25707-21apt-get11:45:593
20630992020,0cyclictest0-21swapper/311:55:593
20630992020,0cyclictest0-21swapper/310:10:563
20630992020,0cyclictest0-21swapper/309:55:573
20630992020,0cyclictest0-21swapper/309:00:583
20630992020,0cyclictest0-21swapper/307:31:003
20630992019,1cyclictest454-21apt-get12:00:593
20630992019,1cyclictest32315-21apt-get08:40:593
20630992019,1cyclictest10630-21apt-get07:55:563
20630992019,1cyclictest0-21swapper/310:56:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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