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2026-06-02 - 21:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Tue Jun 02, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
104418421210,3sleep00-21swapper/009:20:120
99740928061,13sleep30-21swapper/307:06:133
99747827152,13sleep00-21swapper/007:07:080
99622726242,14sleep20-21swapper/207:05:082
139099620,52rtkit-daemon0-21swapper/107:09:191
11008062450,4sleep20-21swapper/212:00:132
11067332410,3sleep00-21swapper/012:15:220
11067332410,3sleep00-21swapper/012:15:220
10373482360,3sleep30-21swapper/309:00:143
10324662350,2sleep33056-21PK-Backend08:45:223
139099300,4rtkit-daemon1389-21rtkit-daemon08:47:101
997861992914,13cyclictest1034974-21cron08:55:002
10471422290,3sleep20-21swapper/209:30:002
997861992823,3cyclictest1100091-21nm-dispatcher11:59:222
997867992618,6cyclictest998987-21xargs07:10:223
139099260,4rtkit-daemon1389-21rtkit-daemon08:28:151
139099260,4rtkit-daemon1389-21rtkit-daemon08:28:141
10674822260,3sleep2331rcuc/210:25:182
99786799256,6cyclictest1109104-21awk12:25:083
139099250,4rtkit-daemon1389-21rtkit-daemon11:03:100
997861992415,7cyclictest436-20systemd-journal11:30:002
997855992414,4cyclictest13-21ksoftirqd/012:13:450
997855992411,11cyclictest1048881-21unin-run09:35:000
99785599240,5cyclictest1061129-21runrttasks10:08:480
99785599240,3cyclictest1053259-21chrt09:45:180
997867992320,2cyclictest3056-21PK-Backend10:06:373
997867992320,2cyclictest0-21swapper/309:44:133
997857992318,3cyclictest1000659-21hddtemp_smartct07:15:141
997857992317,4cyclictest436-20systemd-journal11:14:541
997857992316,5cyclictest1097524-21/usr/sbin/munin11:50:161
99785799230,21cyclictest1085139-21memory11:15:171
99785799230,21cyclictest1085139-21memory11:15:171
997855992318,3cyclictest1087769-21idleruntime-cro11:25:000
997855992315,6cyclictest1056672-21df09:55:130
997855992314,8cyclictest1013960-21unin-run07:55:000
997867992219,2cyclictest3056-21PK-Backend10:23:483
997867992219,2cyclictest0-21swapper/311:42:503
997867992216,4cyclictest42-21ksoftirqd/309:55:123
997867992214,6cyclictest1036708-21cron09:00:003
997861992220,1cyclictest0-21swapper/211:33:532
997861992220,1cyclictest0-21swapper/211:02:572
997861992220,1cyclictest0-21swapper/209:57:152
997861992220,1cyclictest0-21swapper/209:20:302
997861992220,1cyclictest0-21swapper/209:12:332
997861992220,1cyclictest0-21swapper/209:06:382
997861992216,5cyclictest883-21dbus-daemon12:38:032
997857992214,5cyclictest1021795-21needreboot08:15:171
99785799220,21cyclictest1389-21rtkit-daemon10:40:561
99785799220,20cyclictest1389-21rtkit-daemon10:12:181
997855992220,1cyclictest0-21swapper/011:36:020
997855992220,1cyclictest0-21swapper/010:37:410
997855992220,1cyclictest0-21swapper/009:42:590
997855992218,3cyclictest161rcuc/009:05:020
997855992214,7cyclictest1085331-21/usr/sbin/munin11:15:210
997855992214,7cyclictest1085331-21/usr/sbin/munin11:15:200
997855992213,3cyclictest13-21ksoftirqd/011:10:180
99785599220,3cyclictest1028907-21rt-features08:35:200
997867992119,1cyclictest3056-21PK-Backend09:38:593
997867992119,1cyclictest3056-21PK-Backend08:42:213
997867992119,1cyclictest3056-21PK-Backend07:18:203
997867992119,1cyclictest0-21swapper/312:39:343
997867992119,1cyclictest0-21swapper/311:52:293
997867992119,1cyclictest0-21swapper/311:48:443
997867992119,1cyclictest0-21swapper/307:48:273
997867992118,2cyclictest3056-21PK-Backend12:02:093
997867992118,2cyclictest3056-21PK-Backend11:15:193
997867992118,2cyclictest3056-21PK-Backend11:15:193
997867992118,2cyclictest3056-21PK-Backend10:58:423
997867992118,2cyclictest3056-21PK-Backend10:25:233
997867992118,2cyclictest3056-21PK-Backend08:03:283
997867992118,2cyclictest0-21swapper/309:46:023
99786799210,20cyclictest3056-21PK-Backend12:21:433
99786799210,20cyclictest3056-21PK-Backend11:58:243
99786799210,20cyclictest3056-21PK-Backend08:13:573
99786799210,20cyclictest3056-21PK-Backend07:25:293
99786799210,20cyclictest3056-21PK-Backend07:25:293
99786799210,20cyclictest0-21swapper/312:34:013
99786799210,19cyclictest3056-21PK-Backend10:54:433
99786799210,19cyclictest3056-21PK-Backend10:32:193
997861992119,1cyclictest0-21swapper/211:51:382
997861992119,1cyclictest0-21swapper/210:52:242
997861992119,1cyclictest0-21swapper/210:19:112
997861992119,1cyclictest0-21swapper/209:37:272
997861992119,1cyclictest0-21swapper/208:57:382
997861992119,1cyclictest0-21swapper/207:29:392
997861992119,1cyclictest0-21swapper/207:29:382
997861992119,1cyclictest0-21swapper/207:17:002
99786199210,20cyclictest0-21swapper/212:34:232
99786199210,20cyclictest0-21swapper/211:17:102
99786199210,20cyclictest0-21swapper/211:17:102
99786199210,20cyclictest0-21swapper/211:10:412
99786199210,20cyclictest0-21swapper/208:27:102
99786199210,20cyclictest0-21swapper/208:27:102
99786199210,20cyclictest0-21swapper/208:06:012
99785799213,15cyclictest1019116-21cron08:10:001
997857992118,2cyclictest3056-21PK-Backend11:39:371
99785599215,6cyclictest13-21ksoftirqd/008:50:120
997855992119,1cyclictest0-21swapper/012:06:240
997855992119,1cyclictest0-21swapper/010:27:340
997855992119,1cyclictest0-21swapper/010:11:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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