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2026-04-25 - 15:37

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 Sat Apr 25, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
55025621190,2sleep10-21swapper/110:45:211
49757321120,3sleep00-21swapper/008:15:180
49744821060,4sleep33056-21PK-Backend08:15:173
47239528341,14sleep10-21swapper/107:06:511
47252428060,14sleep20-21swapper/207:08:332
47167726844,16sleep00-21swapper/007:05:200
47257826241,14sleep30-21swapper/307:09:143
4884262550,3sleep1251rcuc/107:50:171
5355722510,3sleep20-21swapper/210:05:122
5236862490,2sleep13056-21PK-Backend09:30:131
5285982460,9sleep234-21ksoftirqd/209:45:102
5329412390,2sleep00-21swapper/009:55:230
5632942360,3sleep00-21swapper/011:25:010
4741392320,4sleep234-21ksoftirqd/207:10:362
139099280,4rtkit-daemon1389-21rtkit-daemon12:25:502
139099280,4rtkit-daemon1389-21rtkit-daemon09:51:132
139099280,4rtkit-daemon1389-21rtkit-daemon08:09:212
5615592270,4sleep13056-21PK-Backend11:20:011
139099270,4rtkit-daemon1389-21rtkit-daemon12:08:192
139099270,4rtkit-daemon1389-21rtkit-daemon10:02:553
139099260,4rtkit-daemon1389-21rtkit-daemon10:12:542
47281599250,19cyclictest0-21swapper/108:40:071
139099250,3rtkit-daemon1389-21rtkit-daemon11:36:062
472815992415,2cyclictest3056-21PK-Backend10:56:201
47281599240,23cyclictest0-21swapper/109:21:511
47281599240,22cyclictest0-21swapper/107:26:111
47281599240,18cyclictest0-21swapper/111:45:481
472810992413,9cyclictest484176-21unin-run07:39:590
472826992320,2cyclictest530703-21df_inode09:50:173
472826992317,5cyclictest558543-21cstates11:10:143
472823992315,6cyclictest505536-21cron08:40:002
472823992314,7cyclictest883-21dbus-daemon11:14:012
472815992320,2cyclictest3056-21PK-Backend10:05:181
472815992316,1cyclictest0-21swapper/110:37:081
472810992321,1cyclictest0-21swapper/008:58:470
5462242220,10sleep013-21ksoftirqd/010:35:120
472826992220,1cyclictest3056-21PK-Backend07:59:253
472826992220,1cyclictest0-21swapper/307:17:133
472826992219,2cyclictest3056-21PK-Backend11:53:273
472826992219,2cyclictest3056-21PK-Backend08:27:513
472826992219,2cyclictest3056-21PK-Backend08:01:353
472826992219,2cyclictest3056-21PK-Backend07:10:513
47282699220,20cyclictest3056-21PK-Backend11:05:333
47282699220,20cyclictest3056-21PK-Backend07:35:193
472823992213,7cyclictest883-21dbus-daemon07:15:022
472815992220,1cyclictest3056-21PK-Backend11:34:061
472815992220,1cyclictest0-21swapper/108:56:561
472815992220,1cyclictest0-21swapper/108:23:171
472815992218,3cyclictest0-21swapper/112:20:091
472815992217,4cyclictest3056-21PK-Backend10:53:301
472815992216,1cyclictest3056-21PK-Backend12:05:021
47281599220,21cyclictest0-21swapper/112:00:221
472810992217,4cyclictest13-21ksoftirqd/008:55:000
472810992217,3cyclictest549136-21awk10:44:590
472826992119,1cyclictest3056-21PK-Backend12:36:263
472826992119,1cyclictest3056-21PK-Backend12:36:253
472826992119,1cyclictest3056-21PK-Backend10:48:103
472826992119,1cyclictest3056-21PK-Backend10:41:543
472826992119,1cyclictest3056-21PK-Backend10:24:043
472826992119,1cyclictest0-21swapper/311:24:343
472826992119,1cyclictest0-21swapper/311:00:063
472826992119,1cyclictest0-21swapper/309:55:243
472826992119,1cyclictest0-21swapper/309:17:043
472826992119,1cyclictest0-21swapper/308:59:413
472826992119,1cyclictest0-21swapper/307:48:293
472826992118,2cyclictest3056-21PK-Backend09:43:203
472826992118,2cyclictest3056-21PK-Backend09:38:283
472826992117,3cyclictest514716-21find09:05:123
472826992111,7cyclictest1095-21runrttasks08:55:003
47282699210,20cyclictest3056-21PK-Backend12:08:473
47282699210,20cyclictest0-21swapper/311:36:153
47282699210,19cyclictest3056-21PK-Backend08:35:013
472823992113,6cyclictest519650-21cron09:20:002
47281599212,7cyclictest484472-21apt07:40:121
472815992119,1cyclictest3056-21PK-Backend10:10:451
472815992119,1cyclictest3056-21PK-Backend09:53:141
472815992119,1cyclictest0-21swapper/110:44:251
472815992119,1cyclictest0-21swapper/110:33:151
472815992119,1cyclictest0-21swapper/110:29:231
472815992119,1cyclictest0-21swapper/110:21:531
472815992119,1cyclictest0-21swapper/109:45:171
472815992119,1cyclictest0-21swapper/108:36:421
472815992119,1cyclictest0-21swapper/108:16:281
472815992119,1cyclictest0-21swapper/107:35:451
472815992119,1cyclictest0-21swapper/107:22:411
472815992113,6cyclictest436-20systemd-journal12:15:011
472815992112,7cyclictest517204-21ntp_states09:10:191
47281599210,20cyclictest3056-21PK-Backend09:55:161
47281599210,19cyclictest3056-21PK-Backend12:27:121
472810992119,1cyclictest0-21swapper/012:38:160
472810992119,1cyclictest0-21swapper/012:38:160
472810992119,1cyclictest0-21swapper/012:03:340
472810992119,1cyclictest0-21swapper/011:45:230
472810992119,1cyclictest0-21swapper/009:54:440
472810992119,1cyclictest0-21swapper/009:47:000
472810992119,1cyclictest0-21swapper/009:44:560
472810992119,1cyclictest0-21swapper/009:19:090
472810992119,1cyclictest0-21swapper/008:21:290
472810992119,1cyclictest0-21swapper/008:12:170
472810992119,1cyclictest0-21swapper/007:48:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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