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2026-04-16 - 15:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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.

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 100 highest latencies:
System rackeslot4s.osadl.org (updated Thu Apr 16, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2823799994844,3cyclictest3037486-21kworker/u8:2+events_unbound23:00:220
2823799994742,4cyclictest3130270-21kworker/u8:2+flush-259:000:10:150
2823799994741,4cyclictest252-21systemd-journal22:20:130
2823809994437,5cyclictest3104483-21latency_hist23:40:013
2823805994337,4cyclictest509-21rs:main2
2823799994234,5cyclictest3077877-21ntpq23:10:200
2823805994035,3cyclictest3114783-21latency_hist23:50:022
2823799993833,3cyclictest3037486-21kworker/u8:2+flush-259:022:50:140
2823805993731,4cyclictest3079186-21diskstats23:15:132
2823799993733,3cyclictest2927419-21kworker/u8:4+flush-259:021:00:190
2823799993731,4cyclictest509-21rs:main0
2823799993629,5cyclictest3030975-21ntpq22:25:180
2823803993532,2cyclictest3037486-21kworker/u8:2+flush-259:023:00:181
2823803993531,3cyclictest3058405-21apt-get22:55:111
2823803993531,3cyclictest3058405-21apt-get22:55:111
2823799993531,3cyclictest2891030-21kworker/u8:1+flush-259:020:25:170
2823799993529,4cyclictest3047816-21latency_hist22:45:000
282379999341,31cyclictest1-21systemd20:40:000
282379999341,31cyclictest1-21systemd20:39:590
2823809993326,5cyclictest3119898-21latency_hist23:55:013
2823805993328,3cyclictest252-21systemd-journal21:45:122
2823803993327,4cyclictest3161068-21apt-get00:35:011
2823803993227,3cyclictest252-21systemd-journal20:50:131
2823799993227,3cyclictest3006140-21kworker/u8:0+flush-259:023:20:180
2823799993225,5cyclictest2875745-21latency_hist19:59:590
2823803993124,5cyclictest252-21systemd-journal21:25:001
2823799993126,3cyclictest490-21dbus-daemon20:35:000
2823803993027,2cyclictest3006140-21kworker/u8:0+flush-259:022:50:001
2823799993027,2cyclictest3130270-21kworker/u8:2+flush-259:000:15:210
2823799993025,3cyclictest2849738-21apt-get19:35:110
2823805992925,3cyclictest2891030-21kworker/u8:1+flush-259:021:05:002
2823809992825,2cyclictest2864984-21kworker/u8:2+flush-259:020:05:163
2823805992823,4cyclictest2964417-21/usr/sbin/munin21:25:142
2823805992823,3cyclictest3099586-21/usr/sbin/munin23:35:122
2823803992824,3cyclictest3068684-21kworker/u8:4+flush-259:023:35:211
2823799992823,3cyclictest3119889-21kworker/u8:1+events_unbound00:00:130
2823799992823,3cyclictest3109871-21kworker/u8:0+events_unbound23:50:220
2823805992724,2cyclictest2823983-21kworker/u8:3+flush-259:019:50:152
2823799992723,3cyclictest3068684-21kworker/u8:4+flush-259:023:35:190
2823799992722,4cyclictest2823983-21kworker/u8:3+events_unbound19:10:170
2823799992719,5cyclictest2843539-21ntpq19:25:230
2823799992622,3cyclictest2891030-21kworker/u8:1+flush-259:020:20:170
2823799992621,3cyclictest3140527-21kworker/u8:0+flush-259:000:25:210
2823799992621,3cyclictest3119889-21kworker/u8:1+flush-259:023:55:210
2823799992621,3cyclictest3016526-21apt-get22:15:120
2823799992620,4cyclictest252-21systemd-journal20:15:000
2823799992619,5cyclictest2994277-21ntpq21:50:180
2823809992521,3cyclictest3130270-21kworker/u8:2+flush-259:000:20:003
2823803992522,2cyclictest3026611-21apt-get22:24:551
2823803992520,3cyclictest3104741-21apt-get23:40:101
2823803992518,5cyclictest2984815-21latency_hist21:45:011
2823803992517,6cyclictest3088166-21ntpq23:20:211
2823799992521,3cyclictest3140527-21kworker/u8:0+events_unbound00:20:230
2823799992519,4cyclictest509-21rs:main0
2823809992420,2cyclictest2974508-21kworker/u8:2+flush-259:021:45:173
2823803992420,3cyclictest2860084-21apt-get19:45:121
2823799992420,3cyclictest2891030-21kworker/u8:1+flush-259:020:45:180
2823799992420,3cyclictest2864984-21kworker/u8:2+events_unbound20:05:130
2823799992420,3cyclictest2849497-21kworker/u8:0+events_unbound19:45:240
2823799992419,4cyclictest3006140-21kworker/u8:0+events_unbound22:05:220
2823809992319,3cyclictest2964971-21kworker/u8:1+flush-259:021:30:003
2823809992317,4cyclictest3037895-21diskstats22:35:133
2823805992318,3cyclictest2881365-21diskstats20:05:132
2823803992318,4cyclictest2953494-21gpgv21:15:011
2823803992317,4cyclictest252-21systemd-journal19:20:141
2823799992319,3cyclictest3130270-21kworker/u8:2+flush-259:000:35:190
2823799992319,3cyclictest2964971-21kworker/u8:1+flush-259:022:35:240
2823799992319,3cyclictest2906932-21kworker/u8:0+flush-259:021:10:230
2823799992319,3cyclictest2823983-21kworker/u8:3+events_unbound19:40:140
2823799992317,5cyclictest2870778-21kworker/u8:4+events_unbound20:00:110
2823799992316,5cyclictest2943220-21/usr/sbin/munin21:05:150
2823809992218,3cyclictest2927416-21kworker/u8:2+flush-259:020:50:003
2823805992218,3cyclictest2995170-21kworker/u8:2+flush-259:021:55:172
2823799992217,3cyclictest2906932-21kworker/u8:0+flush-259:021:35:160
2823799992216,4cyclictest3140527-21kworker/u8:0+flush-259:000:34:590
2823799992214,5cyclictest3109645-21latency_hist23:45:020
282380999216,5cyclictest2872474-21cat19:55:173
282380999216,3cyclictest0-21swapper/319:50:153
282380999215,5cyclictest2936971-21ld20:55:233
2823809992117,3cyclictest2870778-21kworker/u8:4+flush-259:020:30:003
2823809992117,3cyclictest2864984-21kworker/u8:2+flush-259:020:10:163
2823809992116,4cyclictest3037486-21kworker/u8:2+flush-259:022:45:243
2823809992114,5cyclictest3031892-21apt-get22:30:003
282380599219,4cyclictest509-21rs:main2
2823805992117,3cyclictest3068684-21kworker/u8:4+flush-259:023:40:152
2823805992114,5cyclictest2833197-21ntpq19:15:212
2823803992115,5cyclictest2870787-21/usr/sbin/munin19:55:211
282380999208,10cyclictest3005772-21cat22:05:013
282380999206,4cyclictest2939615-21cut21:00:183
282380999206,4cyclictest2893106-21cut20:15:173
282380999205,4cyclictest3139665-21ntpq00:10:213
2823809992015,3cyclictest2906966-21apt-get20:30:123
2823809992012,7cyclictest3058371-21kworker/u8:3+flush-259:023:00:013
2823809992012,7cyclictest3058371-21kworker/u8:3+flush-259:023:00:003
2823805992015,4cyclictest3068684-21kworker/u8:4+flush-259:023:25:232
2823803992016,3cyclictest3006140-21kworker/u8:0+flush-259:023:20:011
2823803992016,2cyclictest0-21swapper/120:35:001
2823803992015,4cyclictest3119889-21kworker/u8:1+flush-259:000:00:191
2823799992014,4cyclictest3109871-21kworker/u8:0+events_unbound23:45:260
2823799992014,4cyclictest252-21systemd-journal22:00:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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