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2026-09-13 - 10:36

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of all highest latencies:
System rack5slot4s.osadl.org (updated Sun Sep 13, 2026 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
105574922070,2sleep3481ktimers/321:40:003
9146332710,4sleep00-21swapper/019:19:150
9593862510,5sleep30-21swapper/320:04:153
904272995146,4cyclictest946274-21kworker/u8:0+events_unbound20:14:101
904272994945,3cyclictest1095858-21kworker/u8:1+events_unbound22:29:061
904277994737,8cyclictest278-21systemd-journal19:20:002
904272994539,4cyclictest1180314-21kworker/u8:2+flush-8:000:14:101
904272994539,4cyclictest1180314-21kworker/u8:2+flush-8:000:14:101
904272994337,4cyclictest1110941-21kworker/u8:3+events_unbound22:59:141
904272994336,5cyclictest1185280-21kworker/u8:3+flush-8:000:09:191
904272994333,8cyclictest1224460-21ntpq00:29:161
904277994233,6cyclictest1110778-21cat22:35:012
904272994237,4cyclictest548536-21kworker/u8:1+events_unbound19:44:051
904272994236,5cyclictest1155164-21kworker/u8:2+flush-8:023:24:091
904272994235,5cyclictest3726084-21kworker/u8:2+flush-8:019:29:191
904272994235,5cyclictest1222774-21kworker/u8:3+flush-8:000:34:181
904270994237,4cyclictest1011076-21kworker/u8:0+flush-8:021:34:200
904272994137,3cyclictest1011076-21kworker/u8:0+events_unbound21:24:111
904272994136,4cyclictest1095858-21kworker/u8:1+flush-8:022:24:201
904272994136,3cyclictest1025954-21kworker/u8:1+flush-8:021:29:231
904272994134,5cyclictest930965-21latency_hist19:35:011
904272994036,3cyclictest986460-21kworker/u8:2+events_unbound22:14:061
904272994036,3cyclictest1095858-21kworker/u8:1+events_unbound22:45:001
904272994035,3cyclictest946274-21kworker/u8:0+events_unbound20:34:241
904272993935,3cyclictest926023-21kworker/u8:3+flush-8:020:24:061
904272993934,3cyclictest1135396-21kworker/u8:1+events_unbound23:29:191
904272993933,5cyclictest1205323-21kworker/u8:0+flush-8:000:39:231
904272993932,5cyclictest926023-21kworker/u8:3+flush-8:020:19:211
904270993934,4cyclictest1135396-21kworker/u8:1+flush-8:023:39:140
904270993932,5cyclictest1121187-21apt-get22:49:030
904272993834,3cyclictest1095858-21kworker/u8:1+events_unbound22:34:211
904272993832,3cyclictest1135396-21kworker/u8:1+events_unbound23:49:031
904272993828,8cyclictest278-21systemd-journal00:04:141
904272993827,9cyclictest915532-21ntpq19:19:191
904270993825,11cyclictest1000919-21cron20:45:000
904272993733,3cyclictest1180314-21kworker/u8:2+events_unbound00:19:111
904272993730,4cyclictest986460-21kworker/u8:2+flush-8:021:14:221
904272993729,6cyclictest3726084-21kworker/u8:2+flush-8:020:09:141
904270993727,7cyclictest946049-21latency_hist19:50:000
904272993631,3cyclictest1110941-21kworker/u8:3+events_unbound22:54:221
904272993630,4cyclictest946274-21kworker/u8:0+flush-8:019:59:221
904272993629,5cyclictest926023-21kworker/u8:3+flush-8:019:49:241
904272993629,5cyclictest1011076-21kworker/u8:0+flush-8:023:44:221
904272993628,5cyclictest1011076-21kworker/u8:0+flush-8:021:34:141
904270993631,4cyclictest926023-21kworker/u8:3+flush-8:020:54:100
904270993631,4cyclictest548536-21kworker/u8:1+flush-8:019:44:180
904272993531,3cyclictest1135396-21kworker/u8:1+events_unbound23:39:051
904272993529,5cyclictest1180314-21kworker/u8:2+flush-8:023:54:231
904272993529,4cyclictest548536-21kworker/u8:1+flush-8:019:39:221
904272993529,4cyclictest1110941-21kworker/u8:3+flush-8:022:39:071
904272993528,5cyclictest1060964-21kworker/u8:3+flush-8:022:04:231
904272993527,6cyclictest926023-21kworker/u8:3+flush-8:020:29:151
904270993529,5cyclictest986460-21kworker/u8:2+flush-8:021:09:210
904272993428,5cyclictest986460-21kworker/u8:2+events_unbound21:49:041
904272993427,5cyclictest1011076-21kworker/u8:0+flush-8:021:04:121
904272993427,4cyclictest1135396-21kworker/u8:1+flush-8:023:34:151
904272993423,7cyclictest278-21systemd-journal23:20:001
904270993430,3cyclictest1180320-21systemd-run23:45:000
904270993426,6cyclictest1016017-21latency_hist21:00:000
8997372344,10sleep20-21swapper/219:08:502
904272993328,4cyclictest946274-21kworker/u8:0+events_unbound20:39:101
904272993328,4cyclictest1135396-21kworker/u8:1+events_unbound23:59:201
904272993326,5cyclictest1011076-21kworker/u8:0+flush-8:021:44:211
904272993323,6cyclictest1055552-21latency_hist21:40:011
904270993329,3cyclictest1180314-21kworker/u8:2+events_unbound00:04:110
904270993326,5cyclictest1035164-21ntpq21:19:150
904277993224,6cyclictest1055548-21apt-get21:40:002
904272993227,4cyclictest946274-21kworker/u8:0+flush-8:020:49:201
904272993227,3cyclictest986460-21kworker/u8:2+events_unbound21:59:051
904272993227,3cyclictest904265-21cyclictest23:04:231
904277993125,4cyclictest1085367-21unixbench_multi22:09:222
904272993127,2cyclictest1081368-21fschecks_count22:09:071
904272993125,5cyclictest1205323-21kworker/u8:0+events_unbound00:24:181
904270993127,3cyclictest1-21systemd20:50:000
904270993126,4cyclictest1135396-21kworker/u8:1+flush-8:023:33:460
904270993122,7cyclictest980640-21apt-get20:25:000
904272993025,3cyclictest1095858-21kworker/u8:1+events_unbound22:49:201
904272993024,3cyclictest0-21swapper/120:54:081
904270993026,2cyclictest1219474-21needreboot00:24:170
904270993021,6cyclictest1090669-21latency_hist22:15:010
904270993021,6cyclictest1060739-21latency_hist21:45:010
904272992925,3cyclictest1011076-21kworker/u8:0+events_unbound21:09:081
904272992924,3cyclictest3726084-21kworker/u8:2+events_unbound19:25:011
904272992924,3cyclictest1016058-21systemd-run21:00:001
904272992923,4cyclictest926023-21kworker/u8:3+events_unbound20:44:221
904272992922,5cyclictest548536-21kworker/u8:1+events_unbound19:14:051
904272992921,6cyclictest986460-21kworker/u8:2+flush-8:021:54:211
904277992824,3cyclictest955921-21sendmail20:00:002
904277992824,2cyclictest976292-21aten2_r5power_c20:24:062
904277992824,2cyclictest1001709-21cpuspeed_turbos20:49:032
904272992824,2cyclictest0-21swapper/122:20:001
90427099283,24cyclictest940982-21kworker/0:1+events22:08:550
904270992823,4cyclictest390-21dbus-daemon23:20:010
904270992823,3cyclictest946274-21kworker/u8:0+events_unbound20:35:010
904270992823,3cyclictest1164695-21needreboot23:29:130
90427099282,25cyclictest940982-21kworker/0:1+events00:05:350
904270992822,5cyclictest1011076-21kworker/u8:0+flush-8:021:54:380
904270992822,4cyclictest1229367-21needreboot00:34:140
904270992822,4cyclictest1118433-21kthreadcore22:44:130
904270992821,5cyclictest1205323-21kworker/u8:0+events_unbound00:39:200
904270992821,5cyclictest1060964-21kworker/u8:3+events_unbound22:04:160
904270992820,6cyclictest950981-21latency_hist19:55:000
904277992722,3cyclictest1214983-21cron00:19:592
904272992722,4cyclictest926023-21kworker/u8:3+events_unbound20:04:191
904272992722,3cyclictest1025954-21kworker/u8:1+flush-8:021:19:091
904272992718,5cyclictest0-21swapper/123:14:041
90427099275,20cyclictest940982-21kworker/0:1+events19:55:270
90427099275,18cyclictest940982-21kworker/0:1+events21:55:390
90427099272,24cyclictest940982-21kworker/0:1+events23:00:190
90427099272,24cyclictest940982-21kworker/0:1+events21:03:110
904277992623,2cyclictest1190809-21aten2_r5power_c23:59:062
904277992622,3cyclictest1096216-21aten2_r5power_c22:24:042
904277992621,4cyclictest1035802-21idleruntime-cro21:20:002
904272992622,3cyclictest1011076-21kworker/u8:0+flush-8:023:09:071
90427099266,19cyclictest940982-21kworker/0:1+events22:59:520
90427099266,19cyclictest940982-21kworker/0:1+events22:20:390
904270992623,2cyclictest985871-21systemctl20:30:000
904270992623,2cyclictest1040728-21cron21:25:000
904270992622,3cyclictest1011076-21kworker/u8:0+flush-8:023:05:050
904270992621,4cyclictest1011076-21kworker/u8:0+flush-8:021:39:250
904270992621,3cyclictest0-21swapper/022:54:140
904270992621,3cyclictest0-21swapper/019:15:000
904270992620,4cyclictest923046-21sshd19:29:140
904270992616,8cyclictest278-21systemd-journal20:09:140
904270992616,8cyclictest1195174-21turbostat.cron00:00:010
904270992614,6cyclictest904124-21latency_hist19:10:010
90427099261,24cyclictest940982-21kworker/0:1+events23:52:310
90427099260,25cyclictest940982-21kworker/0:1+events20:10:430
11165572260,2sleep3471rcuc/322:44:083
904277992521,3cyclictest965701-21unixbench_singl20:09:212
904277992521,3cyclictest1234824-21unixbench_multi00:39:272
904277992521,2cyclictest1200036-21unixbench_singl00:04:242
904277992520,4cyclictest1080391-21unixbench_multi22:04:222
90427099256,18cyclictest940982-21kworker/0:1+events20:35:040
90427099256,18cyclictest940982-21kworker/0:1+events00:19:350
90427099255,19cyclictest940982-21kworker/0:1+events23:12:270
90427099255,19cyclictest904151-21kworker/0:2+events19:30:110
904270992521,3cyclictest1011076-21kworker/u8:0+flush-8:021:26:540
89964922510,9sleep10-21swapper/119:07:411
904277992421,2cyclictest1126154-21aten2_r5power_c22:54:062
904277992420,2cyclictest1091261-21aten2_r5power_c22:19:052
904272992419,3cyclictest950894-21unixbench_singl19:54:251
904270992417,5cyclictest1225000-21grep00:29:230
904270992416,6cyclictest935927-21latency_hist19:40:000
904277992320,2cyclictest1136102-21aten2_r5power_p23:04:102
904277992319,3cyclictest985812-21cron20:30:002
904277992319,3cyclictest1186081-21fschecks_count23:54:072
904277992319,2cyclictest991823-21cpuspeed_turbos20:39:052
904277992318,4cyclictest1006971-21cut20:54:092
904277992318,3cyclictest930954-21cron19:35:002
904277992318,3cyclictest925994-21cron19:30:002
90427099234,18cyclictest940982-21kworker/0:1+events22:33:390
904270992318,4cyclictest986460-21kworker/u8:2+flush-8:022:19:450
90427099231,21cyclictest940982-21kworker/0:1+events00:12:150
90427099231,21cyclictest940982-21kworker/0:1+events00:12:150
904277992219,2cyclictest0-21swapper/221:55:002
904277992218,2cyclictest0-21swapper/222:00:002
904277992213,7cyclictest278-21systemd-journal00:15:002
904277992213,7cyclictest278-21systemd-journal00:15:002
90427799221,19cyclictest1178075-21grep23:44:112
90427099226,15cyclictest940982-21kworker/0:1+events23:21:390
90427099225,16cyclictest940982-21kworker/0:1+events21:14:190
90427099222,19cyclictest940982-21kworker/0:1+events23:45:430
90427099222,19cyclictest940982-21kworker/0:1+events22:38:390
90427099222,19cyclictest940982-21kworker/0:1+events22:28:190
90427099222,19cyclictest940982-21kworker/0:1+events21:46:350
90427099222,19cyclictest940982-21kworker/0:1+events20:17:110
904270992217,4cyclictest960775-21unixbench_multi20:04:250
904270992217,4cyclictest3726084-21kworker/u8:2+flush-8:019:23:270
904277992118,2cyclictest1065586-21unixbench_singl21:49:202
904277992117,2cyclictest1116542-21fschecks_count22:44:082
904277992116,1cyclictest0-21swapper/219:44:192
904277992112,2cyclictest0-21swapper/222:10:022
904277992111,8cyclictest1019273-21tr21:04:132
10195202210,3sleep375-21kworker/3:1+events21:04:143
90427799202,13cyclictest956501-21apt-get20:04:062
904277992017,2cyclictest1180913-21aten2_r5power_e23:49:032
904277992017,2cyclictest1161017-21aten2_r5power_c23:29:022
904277992014,5cyclictest3726084-21kworker/u8:2+flush-8:019:24:182
904277992014,4cyclictest1055548-21apt-get21:40:032
9756932190,2sleep3471rcuc/320:20:003
90427799196,3cyclictest10257802grep21:09:242
90427799192,12cyclictest1110484-21apt-get22:35:032
904277991916,2cyclictest1175180-21unixbench_multi23:39:202
904277991916,2cyclictest0-21swapper/221:29:222
904277991915,2cyclictest909218-21basename19:15:002
904277991911,6cyclictest1167074-21cut23:34:092
904277991910,7cyclictest278-21systemd-journal20:59:592
90427799189,2cyclictest0-21swapper/220:19:122
904277991815,2cyclictest0-21swapper/223:20:002
904277991814,3cyclictest1125558-21idleruntime-cro22:50:002
904277991814,2cyclictest0-21swapper/222:57:512
904277991811,5cyclictest1225218-21sort00:30:012
904277991810,6cyclictest1160416-21cron23:25:002
8995992183,9sleep30-21swapper/319:07:033
904277991714,2cyclictest0-21swapper/200:34:172
904277991713,3cyclictest1030871-21cron21:15:002
904277991713,2cyclictest0-21swapper/222:29:212
904277991712,3cyclictest0-21swapper/219:49:142
904277991711,4cyclictest0-21swapper/220:34:132
904277991710,5cyclictest998925-21tr20:44:142
9359632166,6sleep30-21swapper/319:40:023
90427799167,7cyclictest1141184-21sort23:09:052
90427799162,13cyclictest0-21swapper/219:51:592
904277991613,2cyclictest0-21swapper/221:21:302
904277991613,2cyclictest0-21swapper/200:24:572
904277991613,2cyclictest0-21swapper/200:06:202
904277991611,3cyclictest0-21swapper/221:34:092
904277991611,3cyclictest0-21swapper/219:39:152
904277991610,4cyclictest0-21swapper/220:14:132
90427799151,10cyclictest1149741-21ntpq23:14:172
9666092143,7sleep30-21swapper/320:14:073
9956242133,6sleep30-21swapper/320:39:233
9784542135,5sleep30-21swapper/320:24:143
12207222132,7sleep30-21swapper/300:29:063
10656792132,6sleep30-21swapper/321:50:023
10407252132,6sleep30-21swapper/321:25:013
10009252132,6sleep30-21swapper/320:45:013
9318732122,6sleep30-21swapper/319:39:093
9305552122,6sleep30-21swapper/319:34:233
9256842123,5sleep30-21swapper/319:29:273
9121082122,6sleep30-21swapper/319:19:113
12349542122,6sleep30-21swapper/300:40:003
12256372123,5sleep30-21swapper/300:34:033
12056592122,6sleep30-21swapper/300:14:043
12056592122,6sleep30-21swapper/300:14:043
11957682122,6sleep30-21swapper/300:04:053
11863392122,6sleep30-21swapper/323:54:103
11848962122,6sleep30-21swapper/323:49:213
11772772122,6sleep30-21swapper/323:44:113
11613692122,6sleep30-21swapper/323:29:073
11564022122,6sleep30-21swapper/323:24:093
11540522122,6sleep30-21swapper/323:19:163
11453672122,6sleep30-21swapper/323:10:013
11413522122,6sleep30-21swapper/323:09:093
11323572122,6sleep30-21swapper/322:59:183
11268432122,6sleep30-21swapper/322:54:123
11206512122,6sleep30-21swapper/322:45:013
10961572122,6sleep30-21swapper/322:24:033
10910442122,6sleep30-21swapper/322:17:013
10866612123,5sleep30-21swapper/322:14:083
10761702122,6sleep30-21swapper/322:04:053
10710132123,6sleep30-21swapper/321:57:073
10702482122,6sleep30-21swapper/321:54:223
10563672122,6sleep30-21swapper/321:44:073
10320472122,6sleep30-21swapper/321:19:113
10259152121,7sleep30-21swapper/321:10:003
10004112122,6sleep30-21swapper/320:44:213
9865692112,6sleep30-21swapper/320:33:413
9811742113,5sleep30-21swapper/320:26:073
9611432112,6sleep30-21swapper/320:05:213
9555452112,6sleep30-21swapper/319:59:233
9464182112,6sleep30-21swapper/319:51:573
9414452112,6sleep30-21swapper/319:46:433
9163992112,6sleep30-21swapper/319:20:513
9046472112,6sleep30-21swapper/319:13:093
12155302112,6sleep30-21swapper/300:20:503
12100472112,5sleep30-21swapper/300:15:013
12007062112,6sleep30-21swapper/300:09:073
11905462112,6sleep30-21swapper/323:56:273
11748132112,6sleep30-21swapper/323:39:193
11656172112,6sleep30-21swapper/323:30:073
11359692112,6sleep30-21swapper/323:03:513
11110182112,6sleep30-21swapper/322:36:073
11057392112,6sleep30-21swapper/322:30:173
11044672112,6sleep30-21swapper/322:29:123
10806062112,5sleep30-21swapper/322:05:013
10460352112,6sleep30-21swapper/321:31:473
10410432113,5sleep30-21swapper/321:26:053
10261922112,6sleep30-21swapper/321:10:283
10114402112,6sleep30-21swapper/320:57:043
10063452112,6sleep30-21swapper/320:50:383
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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