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2026-04-01 - 12:57

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 the 792 highest latencies:
System rack5slot4s.osadl.org (updated Wed Apr 01, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89310521770,3sleep375-21kworker/3:1-events21:41:343
104223221440,2sleep375-21kworker/3:1+events00:16:283
738333997551,7cyclictest775091-21latency_hist19:45:000
738341996657,6cyclictest888310-21kworker/u8:4+events_unbound21:46:341
738341996551,10cyclictest280-21systemd-journal19:26:321
738333996354,6cyclictest280-21systemd-journal19:40:000
738333996354,6cyclictest280-21systemd-journal19:40:000
738333996352,9cyclictest863282-21ntpq21:11:340
738341996252,7cyclictest765173-21latency_hist19:35:001
738341995951,5cyclictest738165-21latency_hist19:10:011
9234722580,3sleep375-21kworker/3:1-events22:11:443
738333995749,6cyclictest280-21systemd-journal21:41:320
738341995650,4cyclictest718110-21kworker/u8:2+events_unbound20:01:381
738341995649,5cyclictest923697-21kworker/u8:0+events_unbound22:26:361
738342995347,4cyclictest750066-21apt-get19:20:002
738333995345,5cyclictest829477-21latency_hist20:40:010
8158932520,3sleep1815897-21kthreadcore20:26:321
738341995247,3cyclictest755510-21kworker/u8:3+events_unbound20:45:001
738333995243,6cyclictest854243-21latency_hist21:05:010
738333995241,8cyclictest280-21systemd-journal20:15:010
738341995147,3cyclictest938491-21kworker/u8:3+events_unbound23:01:331
738341995145,4cyclictest853475-21kworker/u8:1+events_unbound22:15:011
738341995144,5cyclictest888310-21kworker/u8:4+flush-8:022:06:371
738341995143,5cyclictest770113-21latency_hist19:40:001
738341995143,5cyclictest770113-21latency_hist19:40:001
738333995041,6cyclictest938773-21latency_hist22:30:010
738341994944,3cyclictest789888-21latency_hist20:00:011
738341994943,4cyclictest755510-21kworker/u8:3+events_unbound19:46:351
738341994941,6cyclictest1001575-21kworker/u8:2+flush-8:023:56:401
738341994937,9cyclictest280-21systemd-journal00:40:011
738333994940,6cyclictest1043777-21latency_hist00:20:010
738341994844,3cyclictest853475-21kworker/u8:1+events_unbound22:46:261
738341994843,4cyclictest1037424-21kworker/u8:0+events_unbound00:15:011
738341994842,4cyclictest755510-21kworker/u8:3+flush-8:019:50:311
738333994843,3cyclictest883314-21kworker/u8:2+flush-8:021:51:280
738341994741,4cyclictest923697-21kworker/u8:0+flush-8:022:21:261
738341994741,4cyclictest824475-21kworker/u8:2+events_unbound21:11:231
738341994741,4cyclictest1037424-21kworker/u8:0+events_unbound00:16:231
738341994741,4cyclictest1001575-21kworker/u8:2+events_unbound23:35:001
738341994640,4cyclictest853475-21kworker/u8:1+events_unbound21:31:411
738341994640,3cyclictest938491-21kworker/u8:3+flush-8:023:21:301
738341994635,9cyclictest280-21systemd-journal21:40:011
738342994536,7cyclictest280-21systemd-journal20:57:322
738341994540,4cyclictest844356-21kworker/u8:0+events_unbound21:16:421
738341994540,4cyclictest799532-21kworker/u8:1+events_unbound20:16:381
738341994539,4cyclictest1001575-21kworker/u8:2+events_unbound23:51:401
738341994538,5cyclictest888310-21kworker/u8:4+flush-8:022:01:391
738333994538,5cyclictest280-21systemd-journal19:16:310
738341994438,4cyclictest888310-21kworker/u8:4+flush-8:021:41:271
738341994437,4cyclictest1037424-21kworker/u8:0+events_unbound00:31:381
738333994438,4cyclictest883314-21kworker/u8:2+flush-8:021:56:330
738341994339,3cyclictest883314-21kworker/u8:2+flush-8:021:56:281
738341994339,3cyclictest1037424-21kworker/u8:0+events_unbound00:26:411
738341994336,5cyclictest755510-21kworker/u8:3+flush-8:020:11:321
738333994338,3cyclictest280-21systemd-journal00:30:000
738342994235,5cyclictest838534-21kworker/u8:1+events_unbound20:55:002
738341994237,3cyclictest938491-21kworker/u8:3+events_unbound23:26:381
738341994136,3cyclictest755510-21kworker/u8:3+flush-8:020:31:431
738341994136,3cyclictest755510-21kworker/u8:3+events_unbound20:46:351
738341994134,5cyclictest1028600-21apt-get00:01:231
738341994133,6cyclictest718110-21kworker/u8:2+flush-8:020:06:371
738341994133,5cyclictest280-21systemd-journal19:13:311
8188792400,6chrt0-21swapper/220:26:412
738342994032,5cyclictest1033192-21cron00:04:592
738342994031,7cyclictest1063732-21turbostat.cron00:40:002
738341994035,3cyclictest973642-21kworker/u8:1+events_unbound23:16:271
738341994035,3cyclictest938491-21kworker/u8:3+flush-8:022:36:401
738341994034,4cyclictest1001575-21kworker/u8:2+events_unbound23:41:361
738341994034,4cyclictest1001575-21kworker/u8:2+events_unbound23:41:361
738341994030,8cyclictest754430-21ntpq19:21:361
73833399401,37cyclictest1-21systemd23:20:000
738341993932,5cyclictest824475-21kworker/u8:2+flush-8:020:56:301
738333993932,5cyclictest280-21systemd-journal22:31:320
738333993928,9cyclictest751776-21kthreadcore19:21:320
738342993824,3cyclictest993261-21unixbench_multi23:21:412
738341993834,3cyclictest923697-21kworker/u8:0+flush-8:022:16:281
738341993833,3cyclictest943957-21kworker/u8:2+flush-8:022:51:431
738341993833,3cyclictest943957-21kworker/u8:2+events_unbound22:41:271
738341993833,3cyclictest938491-21kworker/u8:3+flush-8:000:06:321
738341993832,4cyclictest799532-21kworker/u8:1+events_unbound20:21:351
738333993831,5cyclictest1028231-40logrotate00:00:010
73833399382,30cyclictest859199-21kworker/0:0+events22:01:220
738341993729,6cyclictest899596-21apt-get21:51:231
738341993728,6cyclictest280-21systemd-journal20:39:331
738333993733,3cyclictest957783-21kworker/u8:0+flush-8:023:36:410
73833399371,29cyclictest849325-21kworker/0:2+events21:25:020
73833399371,29cyclictest849325-21kworker/0:2+events21:25:020
738341993630,5cyclictest943957-21kworker/u8:2+flush-8:022:56:381
738341993630,4cyclictest755510-21kworker/u8:3+events_unbound19:41:381
738341993629,4cyclictest938491-21kworker/u8:3+flush-8:023:46:451
738333993625,9cyclictest280-21systemd-journal00:36:380
73833399361,29cyclictest728223-21kworker/0:0+events19:26:260
73833399361,28cyclictest859199-21kworker/0:0+events22:16:240
738333993610,24cyclictest849325-21kworker/0:2+events21:06:380
738341993528,5cyclictest691070-21kworker/u8:0+flush-8:019:16:291
738333993527,6cyclictest959148-21diskstats22:51:270
738333993428,4cyclictest824475-21kworker/u8:2+flush-8:020:46:300
738333993417,15cyclictest776910-21sshd19:46:320
738341993327,4cyclictest957783-21kworker/u8:0+events_unbound23:11:261
738333993324,7cyclictest1023282-21latency_hist23:55:010
738333993323,7cyclictest280-21systemd-journal22:11:330
73833399332,30cyclictest859199-21kworker/0:0+events23:07:120
73833399331,30cyclictest728223-21kworker/0:0+events19:51:220
73833399331,30cyclictest728223-21kworker/0:0+events19:31:250
7379772334,9sleep20-21swapper/219:07:442
738341993227,4cyclictest755510-21kworker/u8:3+events_unbound20:51:271
738341993227,3cyclictest824475-21kworker/u8:2+events_unbound21:01:381
738341993226,4cyclictest868640-21kworker/u8:3+flush-8:021:21:381
73833399323,27cyclictest859199-21kworker/0:0+events21:46:320
73833399322,28cyclictest728223-21kworker/0:0+events20:26:260
73833399322,28cyclictest728223-21kworker/0:0+events20:01:420
73833399322,28cyclictest1003499-21kworker/0:1+events00:31:380
738342993127,3cyclictest407-21mta-sts-daemon22:36:332
738341993125,4cyclictest938491-21kworker/u8:3+events_unbound23:36:311
73833399312,27cyclictest988715-21kworker/0:2+events23:26:240
73833399312,27cyclictest814655-21kworker/0:1+events20:56:220
73833399312,27cyclictest814655-21kworker/0:1+events20:41:300
73833399312,27cyclictest814655-21kworker/0:1+events20:31:410
73833399312,27cyclictest728223-21kworker/0:0+events19:11:300
738333993121,8cyclictest280-21systemd-journal21:21:320
73833399311,28cyclictest728223-21kworker/0:0+events20:06:400
73833399311,28cyclictest1003499-21kworker/0:1+events23:46:290
73833399311,28cyclictest1003499-21kworker/0:1+events00:06:220
10517162310,3sleep375-21kworker/3:1+events00:26:323
738342993023,5cyclictest968580-21store23:00:002
738342993023,5cyclictest280-21systemd-journal22:27:592
73833399302,26cyclictest988715-21kworker/0:2+events23:31:330
738333993020,7cyclictest1038810-21latency_hist00:15:010
73833399301,27cyclictest859199-21kworker/0:0+events22:46:220
73833399301,27cyclictest728223-21kworker/0:0+events19:56:220
73833399301,24cyclictest859199-21kworker/0:0+events22:20:050
738333993010,18cyclictest1003499-21kworker/0:1+events23:41:300
738333993010,18cyclictest1003499-21kworker/0:1+events23:41:300
73833399300,25cyclictest814655-21kworker/0:1+events20:50:500
73833399300,25cyclictest1003499-21kworker/0:1+events00:00:130
738342992925,2cyclictest973250-21unixbench_multi23:01:452
73833399290,27cyclictest859199-21kworker/0:0+events23:01:280
738342992823,3cyclictest904748-21cpuspeed_turbos21:56:262
738342992823,3cyclictest1053348-21unixbench_singl00:26:422
738341992824,3cyclictest844356-21kworker/u8:0+flush-8:021:26:331
738341992824,3cyclictest844356-21kworker/u8:0+flush-8:021:26:331
73833399288,15cyclictest728223-21kworker/0:0+events20:20:140
73833399288,15cyclictest728223-21kworker/0:0+events20:15:060
73833399285,19cyclictest859199-21kworker/0:0+events22:55:170
73833399281,26cyclictest859199-21kworker/0:0+events21:31:360
73833399281,25cyclictest859199-21kworker/0:0+events23:21:380
73833399281,25cyclictest859199-21kworker/0:0+events22:44:460
8380012270,2sleep3481ktimers/320:46:323
738342992724,2cyclictest849743-21aten2_r5power_p21:01:262
738341992720,5cyclictest957783-21kworker/u8:0+flush-8:023:06:391
73833399279,17cyclictest1003499-21kworker/0:1+events00:22:480
738333992721,4cyclictest916581-21kthreadcore22:06:320
73833399271,25cyclictest859199-21kworker/0:0+events23:13:530
738333992710,16cyclictest849325-21kworker/0:2+events21:15:280
738342992622,3cyclictest1058559-21idleruntime-cro00:35:002
738342992622,2cyclictest804411-21unixbench_singl20:11:442
738341992622,3cyclictest1028507-21kworker/u8:1+events_unbound00:21:441
738333992610,14cyclictest859199-21kworker/0:0+events22:40:000
738342992521,2cyclictest810095-21aten2_r5power_e20:21:252
738342992521,2cyclictest789526-21unixbench_multi19:56:422
7381072252,5sleep00-21swapper/019:09:260
738342992421,2cyclictest799438-21unixbench_multi20:06:422
738342992418,4cyclictest759936-21unixbench_singl19:26:452
738342992416,6cyclictest280-21systemd-journal19:35:002
738341992420,2cyclictest0-21swapper/121:06:451
738341992419,3cyclictest923697-21kworker/u8:0+flush-8:022:31:321
73833399241,22cyclictest859199-21kworker/0:0+events21:35:090
738342992320,2cyclictest929492-21cpuspeed_turbos22:21:232
738342992319,3cyclictest770123-21idleruntime-cro19:40:002
738342992319,3cyclictest770123-21idleruntime-cro19:40:002
738342992319,2cyclictest859752-21cpuspeed_turbos21:11:242
738342992319,2cyclictest829901-21aten2_r5power_e20:41:242
738342992314,7cyclictest280-21systemd-journal20:05:012
738342992219,2cyclictest820198-21fschecks_count20:31:292
738342992218,3cyclictest1043760-21cron00:20:002
738342992218,2cyclictest0-21swapper/220:50:002
738342992118,2cyclictest864602-21aten2_r5power_v21:16:262
738342992116,3cyclictest978254-21unixbench_singl23:06:452
73834299207,8cyclictest894427-21apt-get21:46:222
738342992017,2cyclictest1013795-21aten2_r5power_c23:46:272
738342992016,2cyclictest0-21swapper/200:06:242
738342992015,3cyclictest825134-21fschecks_count20:36:272
738342992015,3cyclictest784605-21unixbench_singl19:51:422
738342992015,3cyclictest0-21swapper/219:11:262
738342992014,4cyclictest874030-21cat21:25:002
738342992013,5cyclictest929118-21sort22:20:012
738342992012,6cyclictest914416-21sort22:06:222
738342992012,6cyclictest879813-21fschecks_count21:31:272
738342991916,2cyclictest874670-21aten2_r5power_e21:26:252
738342991916,2cyclictest874670-21aten2_r5power_e21:26:252
738342991915,3cyclictest888183-21runrttasks21:36:342
738342991915,2cyclictest0-21swapper/220:16:432
738342991915,2cyclictest0-21swapper/200:15:012
7335392192,9sleep30-21swapper/319:05:043
73834299189,7cyclictest904185-21cat21:55:002
73834299189,7cyclictest854860-21fschecks_count21:06:302
738342991815,2cyclictest909528-21aten2_r5power_c22:01:262
738342991814,2cyclictest0-21swapper/219:41:442
73834299179,6cyclictest994095-21aten2_r5power_v23:26:262
73834299179,6cyclictest1-21systemd23:45:002
73834299179,6cyclictest1-21systemd23:45:002
73834299179,6cyclictest1025741-21tr23:56:312
738342991714,2cyclictest979505-21fschecks_time23:11:272
738342991714,2cyclictest949248-21cpuspeed_turbos22:41:252
738342991713,2cyclictest0-21swapper/223:36:302
738342991713,2cyclictest0-21swapper/223:31:282
738342991713,2cyclictest0-21swapper/223:16:272
738342991712,3cyclictest0-21swapper/223:51:302
738342991712,3cyclictest0-21swapper/219:21:332
73834299171,12cyclictest779196-21ntpq19:46:372
73834299162,13cyclictest0-21swapper/222:48:452
73834299162,13cyclictest0-21swapper/200:20:432
738342991612,2cyclictest0-21swapper/221:41:412
738342991611,3cyclictest0-21swapper/222:31:332
738342991611,3cyclictest0-21swapper/222:11:332
73834299155,8cyclictest959190-21fschecks_count22:51:272
9562762145,5sleep30-21swapper/322:46:323
9367832140,9sleep375-21kworker/3:1+mm_percpu_wq22:26:333
9927902132,7sleep30-21swapper/323:21:353
9052582133,6sleep30-21swapper/321:56:313
8990542132,6sleep30-21swapper/321:50:023
8973532132,7sleep30-21swapper/321:46:333
8803842130,2sleep3481ktimers/321:31:313
8703102132,7sleep30-21swapper/321:21:323
7899292132,6sleep30-21swapper/320:00:023
7841852132,7sleep30-21swapper/319:51:393
7791792132,7sleep30-21swapper/319:46:383
7383782132,6sleep30-21swapper/319:10:023
10332202132,6sleep30-21swapper/300:05:023
9993992122,6sleep30-21swapper/323:31:313
9837632122,5sleep30-21swapper/323:15:013
9739732122,6sleep30-21swapper/323:06:273
9293732122,6sleep30-21swapper/322:21:243
9239972122,6sleep30-21swapper/322:15:023
9182542122,7sleep30-21swapper/322:06:393
8493462122,5sleep30-21swapper/321:00:013
8446842122,6sleep30-21swapper/320:56:243
8245072122,5sleep30-21swapper/320:35:013
8223802122,6sleep30-21swapper/320:31:363
8059662121,7sleep30-21swapper/320:16:313
8039962122,7sleep30-21swapper/320:11:423
7990752122,6sleep30-21swapper/320:06:403
7741012123,6sleep30-21swapper/319:41:363
7682852122,6sleep30-21swapper/319:36:343
7682852122,6sleep30-21swapper/319:36:343
7605382123,5sleep30-21swapper/319:31:003
7602242123,6sleep30-21swapper/319:30:003
7498212122,6sleep30-21swapper/319:17:003
10295192122,6sleep30-21swapper/300:01:323
10175472122,6sleep30-21swapper/323:46:403
10124212122,6sleep30-21swapper/323:41:343
10124212122,6sleep30-21swapper/323:41:343
9951182112,5sleep30-21swapper/323:26:333
9795272112,5sleep30-21swapper/323:11:283
9726292112,5sleep30-21swapper/323:01:373
9638412112,5sleep30-21swapper/322:56:233
9585712112,5sleep30-21swapper/322:50:013
9526252112,5sleep30-21swapper/322:41:343
9439702112,5sleep30-21swapper/322:35:163
9437132112,6sleep30-21swapper/322:35:003
9138002112,5sleep30-21swapper/322:01:463
8868972112,5sleep30-21swapper/321:36:333
8785802112,6sleep30-21swapper/321:26:423
8785802112,6sleep30-21swapper/321:26:423
8682442112,5sleep30-21swapper/321:16:393
8595032112,5sleep30-21swapper/321:11:213
8545992112,6sleep30-21swapper/321:06:283
8342772112,6sleep30-21swapper/320:43:163
8148002111,5sleep30-21swapper/320:25:023
8100422112,5sleep30-21swapper/320:21:253
7852832112,5sleep30-21swapper/319:56:253
7510552112,5sleep30-21swapper/319:21:293
10590712112,6sleep30-21swapper/300:35:403
10536782112,5sleep30-21swapper/300:30:023
10441122112,5sleep30-21swapper/300:21:233
10234692111,5sleep30-21swapper/323:55:023
10183602112,5sleep30-21swapper/323:50:013
8395822102,5sleep30-21swapper/320:50:023
10384132102,5sleep30-21swapper/300:10:073
10037022102,5sleep30-21swapper/323:35:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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