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2026-06-21 - 14:31

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 Sun Jun 21, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2841762998678,6cyclictest2951787-21kworker/u8:2+flush-8:009:05:360
2841762997872,4cyclictest3087243-21kworker/u8:1+events_unbound11:55:370
2841762997665,8cyclictest2938299-21diskstats08:45:240
2841762997465,7cyclictest3092485-21kworker/u8:3+flush-8:011:25:360
2841764997367,4cyclictest2841637-21kworker/u8:0+flush-8:007:20:011
2841762997267,3cyclictest2841637-21kworker/u8:0+flush-8:007:50:350
2841764996557,6cyclictest2873721-21kworker/u8:1+flush-8:008:25:371
2841764996460,3cyclictest3016836-21kworker/u8:2+events_unbound10:40:381
2841764996458,4cyclictest3167017-21kworker/u8:0+events_unbound12:35:351
2841762996358,4cyclictest2841637-21kworker/u8:0+flush-8:007:55:370
2841762996157,3cyclictest2841637-21kworker/u8:0+flush-8:008:15:360
2841762996151,7cyclictest2907199-21ntpq08:10:320
2841762996054,4cyclictest3062026-21kworker/u8:3+flush-8:011:00:410
2841764995949,7cyclictest3126205-21ntpq11:50:321
2841762995954,4cyclictest3137016-21kworker/u8:3+flush-8:012:30:300
2841764995848,8cyclictest2947890-21/usr/sbin/munin08:55:321
2841762995853,3cyclictest2873721-21kworker/u8:1+flush-8:008:30:240
2841762995852,5cyclictest3016836-21kworker/u8:2+flush-8:011:05:410
2841764995753,3cyclictest3137016-21kworker/u8:3+flush-8:012:15:301
2841764995748,7cyclictest2893560-21/usr/sbin/munin08:00:361
2841764995746,9cyclictest2946743-21ntpq08:50:331
2841762995751,4cyclictest3106872-21kworker/u8:2+flush-8:012:05:340
2841762995751,4cyclictest3106872-21kworker/u8:2+flush-8:012:05:330
2841764995652,3cyclictest3161819-21kworker/u8:1+flush-8:012:30:371
2841764995649,5cyclictest3087243-21kworker/u8:1+flush-8:011:55:361
2841762995652,3cyclictest3016836-21kworker/u8:2+flush-8:010:30:310
2841764995547,7cyclictest3011869-21kworker/u8:0+flush-8:010:00:331
2841762995551,3cyclictest2951787-21kworker/u8:2+flush-8:009:10:380
2841762995550,4cyclictest2951787-21kworker/u8:2+flush-8:009:20:350
2841762995549,4cyclictest3016836-21kworker/u8:2+flush-8:010:20:320
2841764995448,4cyclictest3092485-21kworker/u8:3+events_unbound11:30:351
2841764995448,4cyclictest2951787-21kworker/u8:2+flush-8:009:30:211
2841762995447,5cyclictest3011869-21kworker/u8:0+flush-8:010:00:310
2841762995447,5cyclictest2873721-21kworker/u8:1+flush-8:010:45:360
2841762995447,5cyclictest2867611-21ntpq07:30:340
2841762995447,5cyclictest2841637-21kworker/u8:0+flush-8:008:35:370
2841762995348,3cyclictest2873721-21kworker/u8:1+events_unbound10:15:240
2841762995347,4cyclictest3142151-21kworker/u8:0+flush-8:012:10:250
2841762995346,5cyclictest3076533-21kworker/u8:0+flush-8:012:00:300
2841762995345,6cyclictest3137016-21kworker/u8:3+flush-8:012:15:330
29190402520,3sleep0201rcuc/008:25:280
2841762995246,4cyclictest3076533-21kworker/u8:0+flush-8:011:45:310
2841762995146,4cyclictest2841637-21kworker/u8:0+flush-8:008:20:440
2841762995146,4cyclictest2841637-21kworker/u8:0+flush-8:008:20:440
2841764995044,5cyclictest2868482-21kworker/u8:3+flush-8:009:50:371
2841764995043,5cyclictest2868482-21kworker/u8:3+flush-8:009:45:371
2841762995044,4cyclictest3087243-21kworker/u8:1+flush-8:011:15:350
2841762995043,5cyclictest2825635-21kworker/u8:3+flush-8:007:25:360
2841762995043,4cyclictest3111162-21ntpq11:35:330
2841764994944,4cyclictest2841637-21kworker/u8:0+flush-8:007:10:381
2841762994942,4cyclictest2873721-21kworker/u8:1+flush-8:010:50:360
2841762994941,5cyclictest3160884-21ntpq12:25:320
30823862480,3chrt0-21swapper/011:10:220
2841764994842,5cyclictest2868482-21kworker/u8:3+flush-8:008:30:371
2841764994841,5cyclictest3011380-21ntpq09:55:361
2841764994742,4cyclictest3016836-21kworker/u8:2+events_unbound10:30:371
2841764994742,4cyclictest2841637-21kworker/u8:0+flush-8:007:50:411
2841762994743,3cyclictest2873721-21kworker/u8:1+flush-8:010:25:410
2841762994741,4cyclictest3087243-21kworker/u8:1+events_unbound11:40:320
2841762994740,5cyclictest3092497-21/usr/sbin/munin11:20:390
2841762994738,6cyclictest2957558-21latency_hist09:05:000
2841772994639,5cyclictest1704890-21systemd-journal11:24:592
2841764994641,4cyclictest3037280-21kworker/u8:0+flush-8:010:35:351
2841764994641,4cyclictest2873721-21kworker/u8:1+events_unbound09:25:381
2841764994640,5cyclictest3087243-21kworker/u8:1+flush-8:011:15:351
2841764994640,4cyclictest3137016-21kworker/u8:3+events_unbound12:10:391
2841764994640,4cyclictest2873721-21kworker/u8:1+events_unbound09:10:261
2841764994633,10cyclictest1704890-21systemd-journal11:37:311
2841762994641,3cyclictest3106872-21kworker/u8:2+flush-8:012:20:390
2841764994540,4cyclictest2951787-21kworker/u8:2+flush-8:009:05:381
2841764994538,5cyclictest2951787-21kworker/u8:2+events_unbound09:00:311
2841764994533,9cyclictest1704890-21systemd-journal11:06:311
2841762994540,3cyclictest2868482-21kworker/u8:3+flush-8:009:45:340
2841762994538,5cyclictest3016836-21kworker/u8:2+flush-8:010:55:310
2841772994439,4cyclictest2873721-21kworker/u8:1+flush-8:008:15:352
2841764994439,3cyclictest2873721-21kworker/u8:1+events_unbound10:50:351
2841764994438,4cyclictest2841637-21kworker/u8:0+flush-8:008:15:231
2841764994437,5cyclictest2841637-21kworker/u8:0+flush-8:008:45:361
2841764994433,8cyclictest3140993-21ntpq12:05:321
2841764994433,8cyclictest3140993-21ntpq12:05:311
2841762994439,4cyclictest2868482-21kworker/u8:3+flush-8:009:50:420
2841762994439,4cyclictest2868482-21kworker/u8:3+flush-8:008:50:370
2841762994436,6cyclictest2991527-21ntpq09:35:340
2841764994338,4cyclictest2873721-21kworker/u8:1+events_unbound08:10:401
2841764994337,5cyclictest2841637-21kworker/u8:0+flush-8:007:55:441
2841764994337,4cyclictest2841637-21kworker/u8:0+flush-8:008:05:351
2841764994335,6cyclictest2873721-21kworker/u8:1+flush-8:010:25:381
2841762994337,5cyclictest2873721-21kworker/u8:1+events_unbound07:40:370
2841772994236,4cyclictest2957578-21gpgv09:05:012
2841764994237,4cyclictest2825635-21kworker/u8:3+events_unbound07:25:311
2841764994236,4cyclictest3011869-21kworker/u8:0+flush-8:010:10:411
2841762994236,4cyclictest2873721-21kworker/u8:1+flush-8:007:45:280
2841762994232,7cyclictest2873472-21latency_hist07:40:000
2841764994138,2cyclictest3106872-21kworker/u8:2+events_unbound12:25:381
2841764994136,4cyclictest2873721-21kworker/u8:1+events_unbound09:40:211
2841764994135,5cyclictest3062026-21kworker/u8:3+flush-8:011:10:421
2841764994135,4cyclictest2873721-21kworker/u8:1+flush-8:010:45:391
2841764994135,4cyclictest2841637-21kworker/u8:0+events_unbound08:20:341
2841764994135,4cyclictest2841637-21kworker/u8:0+events_unbound08:20:341
2841762994137,3cyclictest3087243-21kworker/u8:1+events_unbound11:50:400
2841762994134,5cyclictest2841637-21kworker/u8:0+flush-8:008:40:250
2841764994036,3cyclictest3016836-21kworker/u8:2+events_unbound10:05:391
2841764994035,3cyclictest2951787-21kworker/u8:2+flush-8:009:35:221
2841764994034,4cyclictest3016836-21kworker/u8:2+flush-8:010:20:231
2841764994033,6cyclictest3076533-21kworker/u8:0+flush-8:011:45:321
2841762994035,4cyclictest2841637-21kworker/u8:0+events_unbound07:20:390
2841762994034,4cyclictest2951787-21kworker/u8:2+flush-8:009:55:410
2841772993934,4cyclictest2873721-21kworker/u8:1+flush-8:009:25:362
2841764993932,6cyclictest3087243-21kworker/u8:1+events_unbound11:40:011
2841764993931,6cyclictest2928140-21apt-get08:35:201
2841762993934,4cyclictest2873721-21kworker/u8:1+events_unbound08:00:360
30993022380,2sleep1281rcuc/111:25:291
2841762993833,3cyclictest2841637-21kworker/u8:0+events_unbound07:15:040
28896822370,6sleep3451irq_work/307:55:303
2841764993730,5cyclictest2951787-21kworker/u8:2+flush-8:009:20:301
2841762993733,3cyclictest2873721-21kworker/u8:1+events_unbound08:05:220
2841762993732,3cyclictest3092485-21kworker/u8:3+flush-8:011:30:280
2841762993728,7cyclictest2845769-21ntpq07:10:330
2841764993626,8cyclictest3136061-21ntpq12:00:311
2841762993632,3cyclictest2951787-21kworker/u8:2+flush-8:009:15:380
2841762993630,4cyclictest3037280-21kworker/u8:0+flush-8:010:35:250
2841772993530,3cyclictest3142151-21kworker/u8:0+flush-8:012:10:412
2841772993529,5cyclictest2873721-21kworker/u8:1+flush-8:007:40:252
2841772993528,5cyclictest2951787-21kworker/u8:2+events_unbound09:40:382
2841764993529,3cyclictest2951787-21kworker/u8:2+events_unbound09:20:001
2841762993529,4cyclictest3016836-21kworker/u8:2+flush-8:010:05:360
2841762993528,5cyclictest3016836-21kworker/u8:2+events_unbound10:40:340
2841772993430,3cyclictest2868482-21kworker/u8:3+events_unbound08:40:392
2841772993429,4cyclictest2841637-21kworker/u8:0+flush-8:007:35:372
2841764993430,3cyclictest2873721-21kworker/u8:1+flush-8:007:45:361
2841764993429,3cyclictest2873721-21kworker/u8:1+events_unbound07:40:281
2841764993429,3cyclictest2841637-21kworker/u8:0+events_unbound07:20:381
2841764993425,6cyclictest2841601-21latency_hist07:10:011
2841772993328,4cyclictest2951787-21kworker/u8:2+flush-8:009:35:352
2841772993323,8cyclictest2867560-21ntpq07:30:332
2841764993329,3cyclictest3016836-21kworker/u8:2+flush-8:010:55:371
2841762993326,5cyclictest2947998-21wget08:55:210
30699322320,7sleep3451irq_work/310:55:293
2841772993228,3cyclictest3011869-21kworker/u8:0+events_unbound10:00:002
2841762993226,4cyclictest2951787-21kworker/u8:2+events_unbound09:30:210
2841772993026,3cyclictest401-21dbus-daemon11:00:002
2841772993019,8cyclictest1704890-21systemd-journal07:19:312
2841764993025,4cyclictest3106872-21kworker/u8:2+flush-8:012:20:301
2841764993024,4cyclictest2863840-21aten2_r5power_v07:30:211
2841762993026,3cyclictest3011869-21kworker/u8:0+events_unbound10:10:290
2841772992925,2cyclictest2907702-21unixbench_multi08:10:412
2841772992924,3cyclictest3091594-21unixbench_singl11:15:392
284177299290,27cyclictest2952567-21cron09:00:012
2841764992922,5cyclictest3076448-21unixbench_multi11:00:401
2841762992824,3cyclictest2873721-21kworker/u8:1+flush-8:009:40:060
2841762992823,4cyclictest2873721-21kworker/u8:1+flush-8:009:25:370
2841772992724,2cyclictest3137482-21cpuspeed_turbos12:05:222
2841772992724,2cyclictest3137482-21cpuspeed_turbos12:05:212
2841772992723,2cyclictest3032590-21cpuspeed_turbos10:20:232
2841772992723,2cyclictest2938271-21tr08:45:222
284177299271,23cyclictest2888841-21cpuspeed_turbos07:55:242
2841764992720,5cyclictest3087243-21kworker/u8:1+flush-8:011:20:321
2841762992723,3cyclictest3167017-21kworker/u8:0+flush-8:012:35:430
2841772992622,2cyclictest2972991-21aten2_r5power_e09:20:192
2841772992622,2cyclictest2968041-21aten2_r5power_p09:15:212
2841772992621,3cyclictest3131636-21unixbench_singl11:55:402
2841772992618,6cyclictest3112319-21gpgv11:40:002
2841772992521,3cyclictest2997892-21cpuspeed_turbos09:45:232
2841772992520,3cyclictest2927466-21unixbench_singl08:30:392
2841764992520,4cyclictest3016836-21kworker/u8:2+events_unbound10:15:351
2841764992518,5cyclictest2933115-21apt-get08:40:211
2841772992421,2cyclictest3052621-21cpuspeed_turbos10:40:232
2841772992418,4cyclictest2932834-21run-parts08:40:012
2841764992419,3cyclictest2873095-21unixbench_singl07:35:411
2841772992320,2cyclictest2917631-21unixbench_singl08:20:412
2841772992320,2cyclictest2917631-21unixbench_singl08:20:402
2841772992319,2cyclictest3002853-21tr09:50:242
2841772992318,4cyclictest3031681-21unixbench_singl10:15:422
2841772992317,4cyclictest3061609-21unixbench_singl10:45:402
284177299229,3cyclictest0-21swapper/208:05:002
2841772992219,2cyclictest3041621-21unixbench_singl10:25:392
2841772992219,2cyclictest2943317-21fschecks_time08:50:242
2841772992218,2cyclictest3022521-21aten2_r5power_p10:10:242
2841772992210,4cyclictest0-21swapper/212:20:322
2841772992118,2cyclictest2853900-21aten2_r5power_p07:20:242
2841772992116,3cyclictest0-21swapper/207:49:592
28412302214,10sleep20-21swapper/207:05:412
284177299202,2cyclictest30521051idleruntime-cro10:40:002
2841772992017,2cyclictest3157381-21fschecks_count12:25:242
2841772992017,2cyclictest3017720-21fschecks_count10:05:252
2841772992016,2cyclictest0-21swapper/211:50:252
2841772992016,2cyclictest0-21swapper/211:05:002
2841772992016,2cyclictest0-21swapper/207:25:392
2841772992015,3cyclictest0-21swapper/210:35:012
2841772992012,6cyclictest1704890-21systemd-journal12:20:012
2841772991915,2cyclictest3132440-21aten2_r5power_v12:00:202
2841772991910,7cyclictest3121475-21mailstats11:45:362
28408212193,9sleep30-21swapper/307:05:383
31082182180,2chrt75-21kworker/3:1+events11:35:253
2841772991814,3cyclictest3101767-21unixbench_singl11:25:402
2841772991814,3cyclictest0-21swapper/212:35:012
2841772991814,2cyclictest3062488-21cpuspeed_turbos10:50:242
2841772991814,2cyclictest0-21swapper/211:10:252
2841772991814,2cyclictest0-21swapper/207:50:292
2841772991813,3cyclictest0-21swapper/210:00:312
2841772991811,6cyclictest3082060-21idleruntime-cro11:10:002
28413932182,11sleep00-21swapper/007:07:350
284177299178,7cyclictest2845435-21cut07:10:292
2841772991713,2cyclictest2966006-21cut09:10:312
2841772991713,2cyclictest0-21swapper/209:05:232
2841772991712,3cyclictest0-21swapper/209:30:312
2841772991712,3cyclictest0-21swapper/208:25:312
2841772991710,5cyclictest0-21swapper/211:30:302
2841772991613,2cyclictest0-21swapper/208:07:012
2841772991612,2cyclictest0-21swapper/212:35:232
2841772991612,2cyclictest0-21swapper/211:40:382
28584842144,6sleep30-21swapper/307:25:013
31369752130,8sleep30-21swapper/312:05:013
31288842133,6sleep30-21swapper/311:55:293
31010862132,7sleep30-21swapper/311:25:323
30560922132,7sleep30-21swapper/310:40:333
30171682132,6sleep30-21swapper/310:05:013
30139742132,8sleep30-21swapper/310:00:283
29867522132,7sleep30-21swapper/309:30:383
29728282132,6sleep30-21swapper/309:20:023
31669802122,6sleep30-21swapper/312:35:033
31635642122,6sleep30-21swapper/312:30:293
31561072122,6sleep30-21swapper/312:20:383
31518272122,5sleep30-21swapper/312:20:023
31425732122,6sleep30-21swapper/312:10:273
31125092122,6sleep30-21swapper/311:40:093
31028022122,6sleep30-21swapper/311:30:253
30928922122,6sleep30-21swapper/311:20:253
30915432122,6sleep30-21swapper/311:15:403
30823352122,6sleep30-21swapper/311:10:233
30768572120,7sleep30-21swapper/311:05:013
30623052123,6sleep30-21swapper/310:50:233
30577092122,6sleep30-21swapper/310:45:263
30520972122,6sleep30-21swapper/310:40:013
30462802122,6sleep30-21swapper/310:30:373
30414252122,6sleep30-21swapper/310:25:403
30362802122,6sleep30-21swapper/310:20:383
30264832122,6sleep30-21swapper/310:10:433
30073382122,6sleep30-21swapper/309:55:013
29981122122,6sleep30-21swapper/309:45:273
29972052122,6sleep30-21swapper/309:42:373
29575422120,7sleep30-21swapper/309:05:023
29503712122,6sleep30-21swapper/308:55:303
29306752122,6sleep30-21swapper/308:35:313
29236472122,6sleep30-21swapper/308:30:253
29215672122,6sleep30-21swapper/308:25:333
29155202122,6sleep30-21swapper/308:20:313
29155202122,6sleep30-21swapper/308:20:303
28997232122,6sleep30-21swapper/308:05:293
28946232122,6sleep30-21swapper/308:00:283
28823372122,6sleep30-21swapper/307:45:303
28735172122,5sleep30-21swapper/307:40:023
28638902122,6sleep30-21swapper/307:30:213
28629372122,6sleep30-21swapper/307:25:413
28466562122,5sleep30-21swapper/307:15:003
28427102122,6sleep30-21swapper/307:10:283
31570882112,5sleep30-21swapper/312:25:183
31409822112,5sleep30-21swapper/312:05:333
31409822112,5sleep30-21swapper/312:05:323
31223872112,6sleep30-21swapper/311:50:163
31211712112,5sleep30-21swapper/311:45:303
30816242112,5sleep30-21swapper/311:05:403
30278282112,5sleep30-21swapper/310:15:283
30025892112,6sleep30-21swapper/309:50:083
29882342111,6sleep30-21swapper/309:35:283
29821732112,6sleep30-21swapper/309:25:393
29630272112,5sleep30-21swapper/309:10:233
29580362112,5sleep30-21swapper/309:05:213
29439092112,5sleep30-21swapper/308:50:283
29385332112,5sleep30-21swapper/308:45:273
29330892112,5sleep30-21swapper/308:40:213
29084152112,5sleep30-21swapper/308:15:213
29063192112,5sleep30-21swapper/308:10:323
28836802112,5sleep30-21swapper/307:50:213
28691932112,6sleep30-21swapper/307:35:283
29683322102,5sleep30-21swapper/309:15:253
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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