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2026-06-18 - 17:55

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 highest latencies:
System rack5slot4s.osadl.org (updated Thu Jun 18, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
353768221790,2sleep375-21kworker/3:1+events07:15:003
37823952980,2chrt0-21swapper/211:15:412
37034402830,5sleep10-21swapper/110:00:011
3532658997260,9cyclictest1704890-21systemd-journal12:35:000
3532664997063,5cyclictest3527656-21kworker/u8:1+flush-8:008:20:422
3532660996762,4cyclictest3527656-21kworker/u8:1+flush-8:008:15:411
3532658996647,16cyclictest3553589-21ntpq07:25:380
3532660996459,4cyclictest3713058-21kworker/u8:2+events_unbound12:20:011
3532660996456,5cyclictest3727345-21ntpq10:20:381
3532660996456,5cyclictest3727345-21ntpq10:20:381
3532660996358,4cyclictest3527656-21kworker/u8:1+events_unbound07:30:441
3532660996354,7cyclictest3517865-21kworker/u8:3+flush-8:007:35:381
3532660996257,3cyclictest3713058-21kworker/u8:2+flush-8:011:05:421
3532660996054,4cyclictest3527656-21kworker/u8:1+flush-8:007:55:261
3532660996050,7cyclictest3828890-21kworker/u8:0+flush-8:012:20:371
36873912590,4sleep0201rcuc/009:40:320
3532660995953,4cyclictest3771820-21kworker/u8:1+events_unbound11:30:401
3532660995951,5cyclictest3636635-21kworker/u8:3+events_unbound09:40:251
3532660995852,4cyclictest3713058-21kworker/u8:2+events_unbound11:00:381
3532660995851,5cyclictest3778121-21kworker/u8:3+events_unbound11:25:361
3532660995847,8cyclictest3642820-21ntpq08:55:351
38121592570,4sleep13812164-21unixbench_singl11:45:421
3532664995752,3cyclictest3713058-21kworker/u8:2+flush-8:010:15:362
3532664995752,3cyclictest3713058-21kworker/u8:2+flush-8:010:15:352
3532660995751,4cyclictest3699353-21kworker/u8:0+flush-8:010:15:391
3532660995751,4cyclictest3699353-21kworker/u8:0+flush-8:010:15:381
3532660995750,5cyclictest3517865-21kworker/u8:3+flush-8:008:05:351
3532658995748,7cyclictest3768021-21/usr/sbin/munin11:05:340
3532660995650,4cyclictest3828890-21kworker/u8:0+events_unbound12:25:241
3532660995650,4cyclictest3678199-21kworker/u8:0+events_unbound09:35:351
3532660995649,5cyclictest3475599-21kworker/u8:2+flush-8:007:10:411
3532660995549,4cyclictest3574247-21kworker/u8:2+events_unbound08:40:331
3532660995548,5cyclictest3527656-21kworker/u8:1+events_unbound08:30:001
3532658995548,5cyclictest3796784-21ntpq11:30:340
3532660995447,5cyclictest3663329-21kworker/u8:1+events_unbound09:30:391
3532660995445,6cyclictest3653791-21latency_hist09:10:011
3532658995445,6cyclictest3732207-21ntpq10:25:340
3532660995348,3cyclictest3828890-21kworker/u8:0+events_unbound12:35:401
3532660995343,8cyclictest3802929-21/usr/sbin/munin11:40:381
3532660995246,5cyclictest3713058-21kworker/u8:2+flush-8:012:10:411
3532660995245,4cyclictest3778121-21kworker/u8:3+flush-8:011:20:261
3532658995245,5cyclictest1704890-21systemd-journal10:20:400
3532658995245,5cyclictest1704890-21systemd-journal10:20:390
3532660995145,4cyclictest3699353-21kworker/u8:0+events_unbound10:10:381
3532660995143,6cyclictest3742070-21ntpq10:35:351
3532658995143,6cyclictest3662790-21ntpq09:15:360
3532658995142,6cyclictest3574231-21latency_hist07:50:010
3532658995142,6cyclictest3574231-21latency_hist07:50:000
3532658995141,7cyclictest1704890-21systemd-journal08:20:010
3532660995045,3cyclictest3517865-21kworker/u8:3+flush-8:007:20:001
3532660995043,4cyclictest3636635-21kworker/u8:3+flush-8:009:45:401
3532658995028,19cyclictest3817708-21/usr/sbin/munin11:55:360
3532664994944,3cyclictest3636635-21kworker/u8:3+flush-8:010:00:392
3532660994942,5cyclictest3626875-21kworker/u8:0+flush-8:009:00:361
3532658994942,4cyclictest3475599-21kworker/u8:2+flush-8:007:10:310
3532658994941,5cyclictest3637796-21ntpq08:50:340
3532660994842,4cyclictest3574247-21kworker/u8:2+events_unbound09:20:361
3532660994841,6cyclictest3771820-21kworker/u8:1+flush-8:011:55:361
3532660994841,5cyclictest3517865-21kworker/u8:3+flush-8:008:00:351
3532658994841,5cyclictest3629092-21/usr/sbin/munin08:45:390
3532658994840,6cyclictest3698352-21latency_hist09:55:010
3532658994739,6cyclictest3791942-21ntpq11:25:360
3532664994641,3cyclictest3517865-21kworker/u8:3+events_unbound07:40:352
3532660994641,4cyclictest3748207-21kworker/u8:0+events_unbound10:55:261
3532660994641,4cyclictest3517865-21kworker/u8:3+flush-8:007:25:361
3532660994641,3cyclictest3713058-21kworker/u8:2+events_unbound10:30:391
3532660994641,3cyclictest3527656-21kworker/u8:1+flush-8:007:40:321
3532660994640,4cyclictest3713058-21kworker/u8:2+events_unbound11:10:431
3532660994640,4cyclictest3663329-21kworker/u8:1+events_unbound10:05:401
3532660994639,5cyclictest3626875-21kworker/u8:0+flush-8:008:45:401
3532664994539,5cyclictest3574247-21kworker/u8:2+flush-8:008:55:372
3532664994539,4cyclictest3574247-21kworker/u8:2+flush-8:008:35:372
3532660994541,3cyclictest3527656-21kworker/u8:1+events_unbound07:45:411
3532660994541,3cyclictest3527656-21kworker/u8:1+events_unbound07:45:411
3532660994539,4cyclictest3517865-21kworker/u8:3+events_unbound08:20:251
3532660994538,5cyclictest3527656-21kworker/u8:1+flush-8:007:20:361
3532664994438,4cyclictest3713058-21kworker/u8:2+events_unbound11:55:432
3532660994439,4cyclictest3636635-21kworker/u8:3+events_unbound09:10:281
3532660994438,5cyclictest3778121-21kworker/u8:3+events_unbound12:05:371
3532660994438,5cyclictest3713058-21kworker/u8:2+flush-8:012:00:351
3532660994437,5cyclictest3574247-21kworker/u8:2+flush-8:009:25:391
3532658994434,7cyclictest3568388-21ntpq07:40:370
3532658994424,17cyclictest3851456-21ntpq12:25:340
3532664994338,4cyclictest3574247-21kworker/u8:2+flush-8:009:05:402
3532660994337,4cyclictest3574247-21kworker/u8:2+flush-8:009:15:351
3532658994333,7cyclictest1704890-21systemd-journal07:20:000
3532658994325,16cyclictest3703300-21cron10:00:000
3532660994237,4cyclictest3713058-21kworker/u8:2+flush-8:010:45:371
3532660994237,3cyclictest3728395-21kworker/u8:4+events_unbound10:25:231
3532658994220,8cyclictest1704890-21systemd-journal10:04:590
35284072423,31sleep30-21swapper/307:05:303
3532664994137,3cyclictest3828890-21kworker/u8:0+flush-8:012:30:382
3532664994135,4cyclictest3778121-21kworker/u8:3+flush-8:011:50:262
3532664994131,8cyclictest1704890-21systemd-journal09:32:152
3532660994034,4cyclictest3636635-21kworker/u8:3+flush-8:009:50:371
3532658994025,13cyclictest3771820-21kworker/u8:1+flush-8:012:00:300
3532658994024,14cyclictest3555208-21irqcore07:30:310
3532658994021,17cyclictest3713286-21sh10:10:000
3532658994021,17cyclictest3593120-21ntp_kernel_pll_08:05:340
3532658994015,3cyclictest421rcuog/211:45:400
3532660993935,3cyclictest3626875-21kworker/u8:0+flush-8:008:50:411
3532660993935,3cyclictest3574247-21kworker/u8:2+events_unbound08:35:391
3532658993920,17cyclictest3742616-21unixbench_singl10:35:420
3532658993919,18cyclictest3648220-21unixbench_multi09:00:420
3532660993832,5cyclictest3778121-21kworker/u8:3+flush-8:011:15:241
3532658993831,5cyclictest3737649-21grep10:30:440
353265899380,20cyclictest3588772-21sshd08:01:140
3532660993733,3cyclictest3713058-21kworker/u8:2+events_unbound10:55:011
3532660993731,5cyclictest3778121-21kworker/u8:3+flush-8:011:35:311
3532660993730,5cyclictest3614088-21apt-get08:30:221
353265899378,21cyclictest3703372-21kworker/0:1+events10:55:220
3532658993728,6cyclictest3717378-21ntpq10:10:370
3532658993718,2cyclictest0-21swapper/008:30:400
3532658993712,6cyclictest38578652chrt12:35:220
3532664993631,3cyclictest3527656-21kworker/u8:1+flush-8:008:10:282
3532664993630,4cyclictest3517865-21kworker/u8:3+events_unbound07:50:352
3532660993632,3cyclictest3828890-21kworker/u8:0+flush-8:012:30:431
3532658993627,7cyclictest3609360-21diskstats08:25:260
3532658993620,14cyclictest3563952-21unixbench_singl07:35:410
3532658993619,4cyclictest3690869-21kthreadcore09:45:320
3532664993531,3cyclictest3713058-21kworker/u8:2+flush-8:011:40:382
3532664993530,4cyclictest3713058-21kworker/u8:2+flush-8:010:45:382
3532664993528,5cyclictest1704890-21systemd-journal11:39:592
3532660993530,4cyclictest3728395-21kworker/u8:4+events_unbound10:40:261
3532660993530,3cyclictest3816582-21ntpq11:50:351
3532658993523,9cyclictest3574759-21diskstats07:50:260
3532658993416,2cyclictest3765844-21runrttasks11:00:330
35323812344,9sleep10-21swapper/107:08:331
37726962330,3chrt3772680-21apt-get11:10:012
3532664993322,8cyclictest3627920-21ntpq08:40:332
3532658993329,3cyclictest3574247-21kworker/u8:2+events_unbound08:40:240
3532658993324,6cyclictest3598944-21latency_hist08:15:020
3532658993315,2cyclictest0-21swapper/010:45:240
3532658993312,7cyclictest3648643-21apt-get09:05:030
3532658993225,5cyclictest3604175-21apt-get08:20:210
35324192324,9sleep20-21swapper/207:09:022
3532660993127,2cyclictest3708289-21idleruntime-cro10:04:591
3532660993125,4cyclictest3598019-21ntpq08:10:351
3532658993113,4cyclictest3747971-21cron10:45:000
3532664993019,8cyclictest1704890-21systemd-journal08:29:132
3532658993023,5cyclictest3517865-21kworker/u8:3+flush-8:007:55:360
3532664992923,4cyclictest3603449-21unixbench_multi08:15:432
3532658992921,6cyclictest3718799-21diskstats10:15:260
3532658992921,6cyclictest3718799-21diskstats10:15:250
3532658992921,5cyclictest3673608-21latency_hist09:30:000
353265899291,27cyclictest3574250-21kworker/0:2+events08:35:340
3532664992823,3cyclictest3831938-21unixbench_singl12:05:422
353265899289,17cyclictest3618701-21kworker/0:0+events08:55:240
3532658992810,16cyclictest3777913-21kworker/0:0+events11:15:270
35324222282,5sleep00-21swapper/007:09:050
3532664992723,2cyclictest0-21swapper/208:45:222
3532664992722,4cyclictest3527656-21kworker/u8:1+flush-8:007:29:032
3532664992721,4cyclictest3837387-21cp12:15:012
3532664992710,4cyclictest37880962aten2_r5power_c11:25:232
3532658992722,3cyclictest3776898-21needreboot11:10:330
353265899271,24cyclictest3797624-21kworker/0:1+events11:54:310
37880932260,2sleep3471rcuc/311:25:233
3532664992622,2cyclictest3733690-21fschecks_count10:30:272
3532664992622,2cyclictest3728671-21cpuspeed_turbos10:25:242
3532664992620,4cyclictest3713058-21kworker/u8:2+flush-8:010:55:062
3532664992619,5cyclictest3693524-21latency_hist09:50:012
3532664992616,8cyclictest1704890-21systemd-journal12:40:002
3532658992618,6cyclictest3753162-21/usr/sbin/munin10:50:350
3532664992520,4cyclictest3626875-21kworker/u8:0+events_unbound09:00:302
3532664992520,3cyclictest3664188-21cpuspeed_turbos09:20:252
3532664992517,6cyclictest1704890-21systemd-journal09:54:592
3532660992518,5cyclictest3517865-21kworker/u8:3+events_unbound07:50:221
3532658992520,3cyclictest401-21dbus-daemon09:35:010
3532658992516,7cyclictest0-21swapper/009:40:000
3532664992416,6cyclictest1704890-21systemd-journal12:20:002
3532664992416,6cyclictest1704890-21systemd-journal11:50:002
353265899248,15cyclictest3797624-21kworker/0:1+events12:10:270
353265899246,16cyclictest3618701-21kworker/0:0+events09:10:360
3532658992418,4cyclictest3807239-21unixbench_singl11:40:430
3532658992412,9cyclictest3837568-21apt-key12:15:000
3532664992320,2cyclictest3614313-21cpuspeed_turbos08:30:252
3532664992317,4cyclictest3594020-21cron08:10:012
3532664992316,5cyclictest3776938-21ntpq11:10:352
3532658992319,3cyclictest3668287-21unixbench_singl09:20:420
3532658992316,5cyclictest3827639-21/usr/sbin/munin12:05:350
3532664992218,2cyclictest3638739-21latency_hist08:55:012
3532664992216,4cyclictest1704890-21systemd-journal08:00:002
353266499220,8cyclictest37012081kthreadcore09:55:332
353266499213,13cyclictest3743297-21apt-get10:40:222
3532664992118,2cyclictest3658292-21unixbench_multi09:10:422
3532664992116,3cyclictest3683047-21unixbench_multi09:35:432
3532658992117,3cyclictest0-21swapper/012:20:360
3532658992117,2cyclictest0-21swapper/011:35:370
37104322200,3sleep20-21swapper/210:05:312
3532664992017,2cyclictest3842863-21aten2_r5power_p12:20:252
3532664992016,3cyclictest3699353-21kworker/u8:0+events_unbound10:10:082
3532664992016,2cyclictest0-21swapper/211:20:222
3532664992016,2cyclictest0-21swapper/207:15:002
3532664992015,4cyclictest3527656-21kworker/u8:1+flush-8:008:00:162
3532664992012,6cyclictest3685531-21tr09:40:312
3532658992015,4cyclictest401-21dbus-daemon07:24:590
3532664991916,2cyclictest3738424-21aten2_r5power_e10:35:242
3532664991916,2cyclictest0-21swapper/209:25:342
3532664991915,3cyclictest3793379-21fschecks_time11:30:262
3532664991915,2cyclictest0-21swapper/207:45:362
3532664991915,2cyclictest0-21swapper/207:45:362
3532664991915,2cyclictest0-21swapper/207:30:332
3532664991915,2cyclictest0-21swapper/207:15:042
3532664991912,5cyclictest3828890-21kworker/u8:0+flush-8:012:26:072
353266499191,14cyclictest3727239-21ntpq10:20:352
353266499191,14cyclictest3727239-21ntpq10:20:352
3532658991814,2cyclictest0-21swapper/011:20:260
38565352172,10sleep30-21swapper/312:30:413
3532664991714,2cyclictest3753452-21fschecks_count10:50:272
3532664991713,3cyclictest3822928-21cpuspeed_turbos12:00:242
3532664991713,3cyclictest3564311-21cron07:40:002
353266499168,6cyclictest3765683-21cut11:00:312
353266499167,6cyclictest3547660-21tr07:20:322
3532664991612,2cyclictest0-21swapper/209:15:232
37803222155,6sleep30-21swapper/311:15:323
38615252142,8sleep30-21swapper/312:35:353
37617182142,8sleep30-21swapper/310:55:343
35732652142,8sleep30-21swapper/307:45:363
35732652142,8sleep30-21swapper/307:45:353
38465222132,7sleep30-21swapper/312:20:383
38165412132,7sleep30-21swapper/311:50:363
38077002132,6sleep30-21swapper/311:45:023
37828762132,6sleep30-21swapper/311:20:013
37778502135,5sleep30-21swapper/311:14:563
36589742132,7sleep30-21swapper/309:15:213
36491532135,5sleep30-21swapper/309:05:223
36139342132,6sleep30-21swapper/308:30:013
35989272132,6sleep30-21swapper/308:15:003
35684152133,6sleep30-21swapper/307:40:383
35593352132,7sleep30-21swapper/307:34:593
35494512132,5sleep30-21swapper/307:25:003
38523042122,6sleep30-21swapper/312:29:203
38380482122,6sleep30-21swapper/312:15:283
38314142121,7sleep30-21swapper/312:05:373
38216162122,6sleep30-21swapper/311:55:413
38072562122,6sleep30-21swapper/311:40:453
38024372122,6sleep30-21swapper/311:37:193
37975272122,6sleep30-21swapper/311:32:383
37672792122,6sleep30-21swapper/311:00:443
37570632122,6sleep30-21swapper/310:50:403
37480702122,6sleep30-21swapper/310:45:013
37378672122,6sleep30-21swapper/310:32:173
37284472122,6sleep30-21swapper/310:25:243
37273412122,6sleep30-21swapper/310:20:383
37273412122,6sleep30-21swapper/310:20:373
37129872122,6sleep30-21swapper/310:06:533
37011452122,6sleep30-21swapper/309:55:343
36835012122,5sleep30-21swapper/309:40:013
36831842122,6sleep30-21swapper/309:36:153
36736912122,6sleep30-21swapper/309:30:023
36439892122,6sleep30-21swapper/309:00:233
36393762122,6sleep30-21swapper/308:55:273
36335732122,6sleep30-21swapper/308:47:153
36280052122,6sleep30-21swapper/308:40:383
36137372122,6sleep30-21swapper/308:29:143
36013732123,6sleep30-21swapper/308:15:343
35891002122,6sleep30-21swapper/308:05:023
35376822122,5sleep30-21swapper/307:15:023
38325552112,5sleep30-21swapper/312:10:013
38266472112,5sleep30-21swapper/312:00:393
37720172112,5sleep30-21swapper/311:05:403
37479412112,6sleep30-21swapper/310:44:423
37421882112,5sleep30-21swapper/310:35:393
37186092112,5sleep30-21swapper/310:15:253
37186092112,5sleep30-21swapper/310:15:253
37180552113,5sleep30-21swapper/310:12:193
37073412112,6sleep30-21swapper/310:00:363
36938862112,6sleep30-21swapper/309:50:243
36925502112,5sleep30-21swapper/309:45:393
36726852112,6sleep30-21swapper/309:25:373
36639122112,5sleep30-21swapper/309:20:023
36578052112,5sleep30-21swapper/309:10:363
36380702112,5sleep30-21swapper/308:50:413
36194802112,6sleep30-21swapper/308:35:283
35844232112,6sleep30-21swapper/308:00:253
35794422112,5sleep30-21swapper/307:55:223
35742552112,5sleep30-21swapper/307:50:013
35595772112,5sleep30-21swapper/307:35:043
35450682112,5sleep30-21swapper/307:20:283
36041432102,4sleep30-21swapper/308:20:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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