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2026-04-05 - 13:27

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 Sun Apr 05, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
412107023480,2sleep3481ktimers/321:16:313
4564123470,5sleep30-21swapper/323:16:303
5872823440,3sleep375-21kworker/3:1+events23:31:273
40461052740,4sleep3481ktimers/320:01:353
40534812600,4chrt0-21swapper/120:11:241
3991813995549,4cyclictest52376-21kworker/u8:2+flush-8:023:46:381
3991813995247,4cyclictest4018601-21kworker/u8:0+events_unbound22:46:311
3991813995246,4cyclictest3949452-21kworker/u8:1+events_unbound20:31:381
3991813995146,4cyclictest4018601-21kworker/u8:0+events_unbound00:11:281
3991813995146,4cyclictest3971780-21kworker/u8:3+flush-8:019:21:231
3991813995146,4cyclictest3971780-21kworker/u8:3+flush-8:019:21:231
3991813995044,4cyclictest4018601-21kworker/u8:0+flush-8:023:06:401
3991809995040,8cyclictest4018601-21kworker/u8:0+flush-8:022:16:390
3991813994843,4cyclictest52376-21kworker/u8:2+events_unbound23:36:381
3991813994843,4cyclictest4018601-21kworker/u8:0+flush-8:022:11:381
3991813994737,7cyclictest4132540-21latency_hist21:30:011
3991813994641,4cyclictest4018601-21kworker/u8:0+flush-8:000:06:401
3991813994641,4cyclictest17664-21kworker/u8:1+flush-8:023:16:381
3991813994641,3cyclictest3949452-21kworker/u8:1+events_unbound21:41:371
3991813994640,5cyclictest82328-21kworker/u8:1+flush-8:023:56:341
3991813994539,4cyclictest4018601-21kworker/u8:0+events_unbound21:06:311
3991813994539,4cyclictest4018601-21kworker/u8:0+events_unbound19:56:381
3991813994536,7cyclictest4018601-21kworker/u8:0+flush-8:022:16:381
3991813994432,9cyclictest4171504-21ntpq22:06:341
3991813994337,5cyclictest4177270-21kworker/u8:3+events_unbound22:41:361
3991813994336,6cyclictest32528-21kworker/u8:3+events_unbound23:26:381
3991813994335,6cyclictest32528-21kworker/u8:3+flush-8:023:51:391
3991813994237,4cyclictest3949452-21kworker/u8:1+flush-8:020:21:231
3991813994236,4cyclictest4018601-21kworker/u8:0+events_unbound20:41:231
3991813994235,5cyclictest4018601-21kworker/u8:0+flush-8:022:01:371
3991809994233,6cyclictest280-21systemd-journal20:35:000
3991813994136,3cyclictest4018601-21kworker/u8:0+events_unbound22:21:341
3991813994135,4cyclictest4018601-21kworker/u8:0+events_unbound21:36:361
3991813994134,5cyclictest4018601-21kworker/u8:0+events_unbound19:51:231
3991813994134,5cyclictest3991904-21kworker/u8:0+flush-8:019:15:031
3991813993934,3cyclictest4018601-21kworker/u8:0+events_unbound21:56:311
3991813993934,3cyclictest4018601-21kworker/u8:0+events_unbound21:56:311
3991813993934,3cyclictest4018601-21kworker/u8:0+events_unbound00:16:271
3991813993933,4cyclictest102192-21kworker/u8:1+events_unbound00:31:231
3991813993932,5cyclictest280-21systemd-journal19:30:001
3991813993833,3cyclictest4018601-21kworker/u8:0+events_unbound20:16:361
3991813993833,3cyclictest3949452-21kworker/u8:1+flush-8:019:11:281
3991813993833,3cyclictest3949452-21kworker/u8:1+events_unbound21:11:341
3991813993831,5cyclictest4187398-21kworker/u8:2+flush-8:022:56:391
3991809993833,3cyclictest4162651-21kworker/u8:1+events_unbound22:06:280
3991809993831,5cyclictest4018601-21kworker/u8:0+flush-8:021:01:250
3991813993732,4cyclictest32528-21kworker/u8:3+flush-8:023:21:341
3991813993732,3cyclictest4187398-21kworker/u8:2+events_unbound22:31:311
3991813993732,3cyclictest123374-21irqrtprio00:36:291
3991813993731,4cyclictest4018601-21kworker/u8:0+events_unbound19:41:281
3991813993730,5cyclictest4018601-21kworker/u8:0+flush-8:000:21:351
3991813993730,5cyclictest3971780-21kworker/u8:3+flush-8:019:46:341
3991813993729,5cyclictest32840-21latency_hist23:05:011
3991809993728,6cyclictest112366-21latency_hist00:25:010
3991809993726,9cyclictest280-21systemd-journal22:59:180
3991813993631,3cyclictest4187398-21kworker/u8:2+events_unbound22:51:281
3991813993630,5cyclictest4018601-21kworker/u8:0+flush-8:023:41:341
3991813993630,4cyclictest3971780-21kworker/u8:3+events_unbound19:36:371
3991813993529,4cyclictest4018601-21kworker/u8:0+flush-8:021:16:351
3991809993530,4cyclictest4177270-21kworker/u8:3+flush-8:022:26:370
3991809993529,4cyclictest3949452-21kworker/u8:1+flush-8:021:41:250
3991813993429,3cyclictest4094085-21irqrtprio20:51:281
3991813993429,3cyclictest17664-21kworker/u8:1+events_unbound23:11:251
3991813993428,4cyclictest3949452-21kworker/u8:1+events_unbound20:36:241
3991813993427,5cyclictest87585-21kworker/u8:2+events_unbound00:01:371
3991813993328,3cyclictest4104156-21kthreadcore21:01:281
3991813993328,3cyclictest4018601-21kworker/u8:0+events_unbound21:46:361
3991813993326,5cyclictest4018601-21kworker/u8:0+flush-8:022:36:351
3991809993326,5cyclictest4156644-21ntpq21:51:330
3991809993325,6cyclictest4162651-21kworker/u8:1+flush-8:022:11:350
3991809993323,7cyclictest4137457-21latency_hist21:35:010
3991813993227,4cyclictest4018601-21kworker/u8:0+flush-8:000:26:371
3991813993227,3cyclictest4018601-21kworker/u8:0+events_unbound21:25:011
3991813993226,4cyclictest32528-21kworker/u8:3+events_unbound23:31:281
3991813993223,7cyclictest280-21systemd-journal20:07:021
3991809993227,4cyclictest4018601-21kworker/u8:0+flush-8:020:01:320
3991809993225,5cyclictest4097642-21grep20:51:400
3991813993125,4cyclictest4018601-21kworker/u8:0+flush-8:020:46:261
3991809993126,4cyclictest4018601-21kworker/u8:0+flush-8:020:36:380
3991816993026,2cyclictest42471-21unixbench_singl23:11:422
3991813993026,3cyclictest4177270-21kworker/u8:3+events_unbound22:26:351
3991813993025,3cyclictest4015943-21kthreadcore19:31:281
3991813993021,7cyclictest4136596-21ntpq21:31:331
3991809993026,2cyclictest4057942-21latency_hist20:15:010
3991809993025,4cyclictest3971780-21kworker/u8:3+flush-8:019:36:330
3991809993023,5cyclictest52376-21kworker/u8:2+flush-8:023:31:340
3991809993023,5cyclictest3971780-21kworker/u8:3+events_unbound19:20:000
3991809993021,6cyclictest4152560-21latency_hist21:50:010
3991809993020,8cyclictest87554-21/usr/sbin/munin00:00:000
3991809993020,8cyclictest4111952-21ntpq21:06:360
3991813992924,3cyclictest4102902-21pluginstate21:00:011
3991813992920,7cyclictest4147804-21kworker/u8:3+flush-8:021:51:221
3991809992923,4cyclictest3971780-21kworker/u8:3+flush-8:019:21:280
3991809992923,4cyclictest3971780-21kworker/u8:3+flush-8:019:21:280
3991809992922,5cyclictest53259-21fschecks_count23:26:240
3991809992920,6cyclictest280-21systemd-journal23:20:010
3991809992920,6cyclictest117346-21latency_hist00:30:010
399180999290,26cyclictest1-21systemd20:41:080
399181699288,4cyclictest0-21swapper/200:11:312
3991816992823,3cyclictest4137442-21cron21:35:002
3991809992825,2cyclictest4184743-21kthreadcore22:21:290
3991809992824,3cyclictest3949452-21kworker/u8:1+flush-8:020:06:380
3991809992820,4cyclictest0-21swapper/019:51:200
39907992285,17sleep10-21swapper/119:06:351
3991816992723,2cyclictest78049-21aten2_r5power_c23:51:222
3991816992723,2cyclictest53025-21aten2_r5power_c23:26:222
3991816992723,2cyclictest4063333-21apt-key20:20:012
3991816992723,2cyclictest108066-21fschecks_count00:21:252
3991809992723,2cyclictest4033265-21systemd-run19:50:010
3991809992723,2cyclictest0-21swapper/023:40:010
3991809992723,2cyclictest0-21swapper/021:21:230
3991809992721,4cyclictest4018601-21kworker/u8:0+flush-8:021:56:380
3991809992721,4cyclictest4018601-21kworker/u8:0+flush-8:021:56:380
3991809992719,6cyclictest4098547-21diskstats20:56:240
3991816992623,2cyclictest8712-21fschecks_count22:41:242
3991816992622,2cyclictest3992057-21aten2_r5power_c19:11:222
3991816992622,2cyclictest0-21swapper/219:31:262
3991816992621,3cyclictest72719-21idleruntime-cro23:45:002
3991809992623,2cyclictest21982-21needreboot22:51:330
3991809992622,3cyclictest0-21swapper/023:41:390
3991809992622,3cyclictest0-21swapper/000:35:000
3991809992622,2cyclictest4063051-21latency_hist20:20:010
3991809992622,2cyclictest4014316-21irqcore19:31:260
3991809992621,4cyclictest87585-21kworker/u8:2+flush-8:000:06:340
3991816992522,2cyclictest4108517-21fschecks_time21:06:262
3991816992522,2cyclictest4107499-21unixbench_singl21:01:412
3991816992522,2cyclictest117030-21unixbench_singl00:26:422
3991816992521,2cyclictest4182642-21aten2_r5power_e22:21:222
3991816992521,2cyclictest4102497-21unixbench_multi20:56:402
3991816992519,4cyclictest27467-21unixbench_multi22:56:402
3991813992520,3cyclictest3949452-21kworker/u8:1+flush-8:020:26:281
399180999252,22cyclictest0-21swapper/021:26:380
3991809992521,3cyclictest4043125-21cron20:00:000
3991809992520,3cyclictest413-21systemd-logind21:15:000
3991809992520,3cyclictest4024624-21kthreadcore19:41:280
3991809992520,3cyclictest4018601-21kworker/u8:0+events_unbound20:46:280
3991809992518,5cyclictest122530-21kworker/u8:2+flush-8:000:36:360
3991809992517,6cyclictest42760-21cron23:15:000
3991809992510,13cyclictest31616-21tr23:01:300
3991816992421,2cyclictest4083761-21fschecks_count20:41:242
3991816992420,2cyclictest4181839-21unixbench_multi22:16:392
3991816992420,2cyclictest4088564-21aten2_r5power_v20:46:202
3991816992414,8cyclictest67501-21apt-get23:40:002
399181699240,8cyclictest41230342basename21:21:232
399180999242,21cyclictest0-21swapper/000:11:390
3991809992420,3cyclictest1-21systemd20:30:000
3991809992418,3cyclictest0-21swapper/021:36:230
3991809992417,5cyclictest107411-21idleruntime-cro00:20:000
3991809992415,2cyclictest421rcuog/222:41:280
41836782230,2sleep375-21kworker/3:1+events22:21:283
3991816992320,2cyclictest4138157-21fschecks_time21:36:262
3991816992319,3cyclictest4118263-21cpuspeed_turbos21:16:242
3991816992319,3cyclictest4033232-21cron19:50:002
3991816992319,2cyclictest4043730-21cpuspeed_turbos20:01:282
3991816992319,2cyclictest0-21swapper/221:26:312
3991816992319,2cyclictest0-21swapper/220:40:002
3991816992318,4cyclictest4003521-21sendmail19:20:002
3991816992317,4cyclictest4097644-21unixbench_singl20:51:412
3991816992315,7cyclictest4067769-21unixbench_singl20:21:402
3991813992318,3cyclictest0-21swapper/120:01:331
399180999237,15cyclictest4008519-21kworker/0:0+events22:36:310
399180999232,20cyclictest0-21swapper/020:21:380
3991809992321,1cyclictest0-21swapper/022:01:380
3991809992318,4cyclictest4122335-21unixbench_singl21:16:410
3991809992318,2cyclictest0-21swapper/023:06:200
3991809992317,4cyclictest532-21kthreadcore22:31:280
3991809992317,4cyclictest52376-21kworker/u8:2+flush-8:023:46:300
3991816992219,2cyclictest0-21swapper/222:31:372
3991816992218,3cyclictest4003951-21aten2_r5power_e19:21:222
3991816992218,3cyclictest4003951-21aten2_r5power_e19:21:222
3991816992218,3cyclictest117909-21cpuspeed_turbos00:31:222
3991816992218,2cyclictest0-21swapper/220:11:242
3991816992213,7cyclictest7826-21sshd22:37:182
3991809992219,2cyclictest4009575-21irqrtprio19:26:260
3991809992217,4cyclictest17664-21kworker/u8:1+flush-8:023:21:230
399181699219,8cyclictest28206-21apt-get23:01:202
3991816992117,2cyclictest4033677-21aten2_r5power_p19:51:212
3991816992116,3cyclictest4156773-21grep21:51:372
3991816992112,7cyclictest4147766-21awk21:45:012
3991809992116,3cyclictest14657-21kthreadcore22:46:270
3991809992113,5cyclictest1-21systemd19:15:010
3991809992112,7cyclictest32528-21kworker/u8:3+flush-8:023:51:340
39908992212,13sleep03991009-21tr19:06:380
399181699202,2cyclictest40108131kthreadcore19:26:282
399181699202,13cyclictest73062-21apt-get23:46:222
399181699200,11cyclictest40220802cut19:36:312
39913892209,8sleep20-21swapper/219:07:212
39867222203,8sleep30-21swapper/319:05:013
399181699194,4cyclictest0-21swapper/222:50:582
399181699192,13cyclictest102793-21apt-get00:16:202
3991816991916,2cyclictest4168682-21kthreadcore22:06:282
3991816991915,2cyclictest0-21swapper/200:36:262
399181699189,7cyclictest4078107-21cat20:35:012
3991816991814,3cyclictest4187785-21fschecks_count22:26:232
3991816991814,2cyclictest0-21swapper/223:31:312
3991816991814,2cyclictest0-21swapper/219:41:322
3991816991813,3cyclictest0-21swapper/223:06:412
3991816991810,6cyclictest4115417-21tr21:11:302
3991816991810,6cyclictest4043123-21cron20:00:002
3991809991811,5cyclictest88317-21ls00:01:260
41925042172,10sleep30-21swapper/322:31:203
399181699179,6cyclictest85929-21tr23:56:322
399181699178,6cyclictest50589-21tr23:21:292
3991816991712,3cyclictest4158351-21irqcore21:56:282
3991816991712,3cyclictest4158351-21irqcore21:56:282
3991816991711,3cyclictest46872-21ntpq23:16:342
3991816991710,5cyclictest4151232-21tr21:46:292
399181699169,5cyclictest95196-21tr00:06:302
399181699167,7cyclictest4174017-21tr22:11:292
3991816991613,2cyclictest0-21swapper/220:06:182
3991816991612,2cyclictest0-21swapper/222:46:252
3991816991611,3cyclictest0-21swapper/200:01:302
399181699161,11cyclictest4162775-21apt-get22:01:202
399181699161,11cyclictest4068436-21apt-get20:26:212
666542142,8sleep30-21swapper/323:36:343
278832140,3sleep3481ktimers/323:00:013
528362132,6sleep30-21swapper/323:25:023
41077212132,6sleep30-21swapper/321:04:003
40125682132,7sleep30-21swapper/319:26:323
31382132,6sleep30-21swapper/322:35:023
980982122,6sleep30-21swapper/300:11:253
89332122,6sleep30-21swapper/322:41:283
850762120,2sleep3481ktimers/323:56:313
778892122,5sleep30-21swapper/323:50:023
41873772122,6sleep30-21swapper/322:25:023
41725572122,6sleep30-21swapper/322:10:183
41677292122,6sleep30-21swapper/322:06:203
41626672122,6sleep30-21swapper/322:00:183
41479862122,6sleep30-21swapper/321:46:223
41432822122,6sleep30-21swapper/321:41:283
41331332122,6sleep30-21swapper/321:31:253
41319632122,6sleep30-21swapper/321:26:393
41226622122,5sleep30-21swapper/321:20:013
40938222122,6sleep30-21swapper/320:51:283
40881402122,6sleep30-21swapper/320:45:023
40684082122,6sleep30-21swapper/320:26:203
40629712122,6sleep30-21swapper/320:20:023
40382062122,5sleep30-21swapper/319:55:013
40345942122,6sleep30-21swapper/319:51:283
40283982122,5sleep30-21swapper/319:45:023
40164442122,6sleep30-21swapper/319:31:303
40084822120,8sleep30-21swapper/319:25:003
40084822120,8sleep30-21swapper/319:25:003
39964512122,6sleep30-21swapper/319:12:283
278832122,6sleep30-21swapper/323:00:023
1272002122,6sleep30-21swapper/300:39:263
1212422122,6sleep30-21swapper/300:31:323
1163552123,6sleep30-21swapper/300:26:343
928512112,5sleep30-21swapper/300:06:193
875942112,5sleep30-21swapper/300:00:013
767262112,5sleep30-21swapper/323:46:333
680742112,5sleep30-21swapper/323:41:193
519202112,5sleep30-21swapper/323:21:373
41775752112,6sleep30-21swapper/322:16:193
41580742112,5sleep30-21swapper/321:56:253
41580742112,5sleep30-21swapper/321:56:253
41528792112,5sleep30-21swapper/321:51:193
41376762112,5sleep30-21swapper/321:35:023
41130022113,5sleep30-21swapper/321:10:223
41086562112,5sleep30-21swapper/321:06:293
41019832112,5sleep30-21swapper/320:56:333
40843782112,5sleep30-21swapper/320:41:293
40784122112,5sleep30-21swapper/320:35:023
40733462112,5sleep30-21swapper/320:31:213
40581732112,6sleep30-21swapper/320:15:123
40532452112,5sleep30-21swapper/320:10:023
40483922112,5sleep30-21swapper/320:06:213
40240092112,5sleep30-21swapper/319:41:253
40191312112,6sleep30-21swapper/319:36:273
39993042112,5sleep30-21swapper/319:16:253
381642112,5sleep30-21swapper/323:11:213
330972112,6sleep30-21swapper/323:05:323
181392112,5sleep30-21swapper/322:50:023
133582112,6sleep30-21swapper/322:46:213
1077482112,5sleep30-21swapper/300:21:203
1026682112,5sleep30-21swapper/300:15:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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