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2026-06-22 - 22:14

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 Mon Jun 22, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
278582721030,2sleep375-21kworker/3:1-events10:10:283
2603339997662,11cyclictest1704890-21systemd-journal08:15:350
2603339997267,4cyclictest2630221-21kworker/u8:1+flush-8:007:40:350
2603339997265,5cyclictest2804452-21kworker/u8:0+flush-8:010:40:390
2603339997063,6cyclictest2854451-21kworker/u8:1+flush-8:011:20:370
2603340996960,7cyclictest2908894-21kworker/u8:0+flush-8:012:30:381
2603339996962,5cyclictest1264902-21kworker/u8:2+events_unbound10:25:350
2603339996762,4cyclictest2551647-21kworker/u8:0+events_unbound07:30:370
2603339996753,5cyclictest1264902-21kworker/u8:2+events_unbound10:10:400
2603339996560,3cyclictest1264902-21kworker/u8:2+flush-8:009:40:390
2603339996560,3cyclictest1264902-21kworker/u8:2+flush-8:009:40:390
2603339996559,5cyclictest2804452-21kworker/u8:0+events_unbound11:00:380
2603339996459,4cyclictest2644928-21kworker/u8:3+flush-8:008:25:380
2603339996458,4cyclictest2551647-21kworker/u8:0+flush-8:009:15:360
2603339996457,5cyclictest2863827-21kworker/u8:2+events_unbound12:35:380
2603339996456,6cyclictest2834413-21kworker/u8:3+flush-8:011:45:330
2603340996252,7cyclictest2913812-21latency_hist12:20:001
2603339996258,3cyclictest1264902-21kworker/u8:2+flush-8:010:45:360
2603339996255,5cyclictest2719542-21kworker/u8:1+flush-8:009:30:340
2603340996151,7cyclictest1704890-21systemd-journal11:40:011
2603339996148,11cyclictest2551647-21kworker/u8:0+flush-8:007:15:060
2603339995952,4cyclictest1264902-21kworker/u8:2+events_unbound09:20:370
2603339995950,6cyclictest2750077-21apt-get09:35:160
2603339995949,7cyclictest2649337-21ntpq07:50:340
2603340995852,4cyclictest1264902-21kworker/u8:2+flush-8:008:45:371
2603339995853,3cyclictest2863827-21kworker/u8:2+events_unbound12:20:350
2603339995852,5cyclictest2719542-21kworker/u8:1+flush-8:009:45:320
2603340995751,4cyclictest1264902-21kworker/u8:2+flush-8:007:20:011
2603339995746,8cyclictest2709028-21ntpq08:50:320
2603340995650,4cyclictest2630221-21kworker/u8:1+flush-8:007:45:301
2603340995647,7cyclictest1264902-21kworker/u8:2+flush-8:007:20:341
27410692550,2chrt0-21swapper/309:25:253
2603340995549,4cyclictest2644928-21kworker/u8:3+flush-8:008:30:231
2603340995548,5cyclictest2863827-21kworker/u8:2+events_unbound11:50:371
2603340995548,5cyclictest2610653-21kworker/u8:3+flush-8:007:25:371
2603340995547,6cyclictest2644928-21kworker/u8:3+events_unbound09:00:381
2603339995548,5cyclictest2764366-21kworker/u8:3+events_unbound10:30:360
2603340995447,5cyclictest2789571-21kworker/u8:1+flush-8:010:50:361
2603339995446,5cyclictest2789571-21kworker/u8:1+flush-8:010:50:200
2603339995346,5cyclictest2863827-21kworker/u8:2+flush-8:011:40:350
2603339995344,6cyclictest2923933-21latency_hist12:30:010
2603339995344,6cyclictest2904211-21apt-get12:10:190
2603345995245,5cyclictest1704890-21systemd-journal09:45:362
2603345995244,6cyclictest2764366-21kworker/u8:3+flush-8:010:30:412
2603340995247,4cyclictest2644928-21kworker/u8:3+flush-8:008:25:361
2603340995247,3cyclictest2834413-21kworker/u8:3+flush-8:012:25:381
2603340995244,5cyclictest2644928-21kworker/u8:3+flush-8:008:50:231
2603340995142,7cyclictest2729865-21cp09:15:001
2603340995142,7cyclictest1264902-21kworker/u8:2+flush-8:009:20:351
2603340995141,8cyclictest2853971-21apt-get11:20:011
2603339995147,3cyclictest2804452-21kworker/u8:0+events_unbound11:10:350
2603339995146,4cyclictest1264902-21kworker/u8:2+events_unbound09:05:370
2603339995146,3cyclictest2644928-21kworker/u8:3+flush-8:008:55:340
2603339995046,3cyclictest2834413-21kworker/u8:3+events_unbound11:25:190
2603339995045,3cyclictest2644928-21kworker/u8:3+flush-8:008:20:260
2603339995044,5cyclictest2834413-21kworker/u8:3+flush-8:012:05:330
2603339995044,5cyclictest2551647-21kworker/u8:0+events_unbound08:00:380
2603339995044,4cyclictest1264902-21kworker/u8:2+flush-8:009:25:210
2603339995043,4cyclictest1264902-21kworker/u8:2+events_unbound08:40:320
2603340994942,5cyclictest2759157-21kworker/u8:0+flush-8:009:50:301
2603339994945,3cyclictest2644928-21kworker/u8:3+events_unbound08:30:360
2603339994942,5cyclictest2834413-21kworker/u8:3+events_unbound11:30:310
2603339994939,8cyclictest2634388-21ntpq07:35:350
2603340994842,4cyclictest2610653-21kworker/u8:3+flush-8:007:30:401
2603340994839,6cyclictest2839191-21latency_hist11:05:011
2603339994843,4cyclictest2804452-21kworker/u8:0+events_unbound11:05:370
2603339994843,4cyclictest1264902-21kworker/u8:2+flush-8:010:05:360
2603339994841,5cyclictest2834413-21kworker/u8:3+flush-8:011:55:360
2603339994838,7cyclictest2833249-21ntpq10:55:310
2603340994734,9cyclictest1704890-21systemd-journal09:30:371
2603339994743,3cyclictest2834413-21kworker/u8:3+events_unbound11:15:250
2603340994640,4cyclictest1264902-21kworker/u8:2+events_unbound10:15:221
2603339994637,7cyclictest2645273-21latency_hist07:50:010
2603339994540,4cyclictest2863827-21kworker/u8:2+events_unbound11:50:390
2603339994539,5cyclictest2863827-21kworker/u8:2+flush-8:012:00:270
2603339994539,3cyclictest1264902-21kworker/u8:2+flush-8:010:15:340
25987842457,30sleep30-21swapper/307:05:243
2603345994438,4cyclictest2644928-21kworker/u8:3+flush-8:008:15:252
2603340994440,3cyclictest2551647-21kworker/u8:0+events_unbound07:10:351
2603340994438,4cyclictest2748939-21kworker/u8:3+events_unbound09:35:371
2603340994437,5cyclictest1264902-21kworker/u8:2+flush-8:007:35:371
2603340994436,6cyclictest1264902-21kworker/u8:2+flush-8:010:10:351
2603339994438,4cyclictest2764366-21kworker/u8:3+events_unbound10:00:320
2603339994438,4cyclictest1264902-21kworker/u8:2+events_unbound08:45:340
2603339994437,5cyclictest2551647-21kworker/u8:0+events_unbound08:05:340
2603339994432,9cyclictest2619461-21ntpq07:20:310
2603345994336,5cyclictest2804452-21kworker/u8:0+events_unbound10:55:402
2603340994338,3cyclictest2644928-21kworker/u8:3+events_unbound08:15:361
2603340994337,4cyclictest2863827-21kworker/u8:2+flush-8:012:20:381
2603340994335,6cyclictest2630221-21kworker/u8:1+flush-8:007:40:211
2603340994332,9cyclictest1704890-21systemd-journal08:15:001
2603339994336,5cyclictest2908894-21kworker/u8:0+events_unbound12:30:330
2603340994236,5cyclictest2834413-21kworker/u8:3+flush-8:012:00:371
2603340994234,6cyclictest1264902-21kworker/u8:2+flush-8:008:40:341
2603340994233,7cyclictest1264902-21kworker/u8:2+events_unbound09:40:331
2603340994233,7cyclictest1264902-21kworker/u8:2+events_unbound09:40:321
2603340994232,7cyclictest2784596-21latency_hist10:10:011
2603345994135,5cyclictest2644928-21kworker/u8:3+events_unbound08:50:352
2603345994131,8cyclictest2914255-21cp12:20:012
2603340994136,4cyclictest2804452-21kworker/u8:0+flush-8:011:10:201
2603339994137,3cyclictest2764366-21kworker/u8:3+events_unbound09:50:360
2603339994136,4cyclictest2551647-21kworker/u8:0+events_unbound07:10:240
2603339994135,4cyclictest2789571-21kworker/u8:1+events_unbound10:20:200
2603339994135,4cyclictest2759157-21kworker/u8:0+events_unbound09:55:210
2603339994134,5cyclictest2863827-21kworker/u8:2+flush-8:011:35:350
2603345994036,3cyclictest2644928-21kworker/u8:3+flush-8:007:55:362
2603345994028,7cyclictest2630221-21kworker/u8:1+flush-8:007:40:352
2603340994035,4cyclictest2551647-21kworker/u8:0+events_unbound09:15:371
2603340994035,3cyclictest2644928-21kworker/u8:3+flush-8:008:20:381
2603340994034,4cyclictest2899255-21apt-get12:05:181
2603340994033,4cyclictest2644928-21kworker/u8:3+flush-8:008:55:241
2603339994035,3cyclictest2644928-21kworker/u8:3+flush-8:009:00:330
2603340993934,4cyclictest2764366-21kworker/u8:3+flush-8:010:35:361
2603339993933,4cyclictest2913852-21gpgv12:19:590
2603345993834,3cyclictest1264902-21kworker/u8:2+events_unbound09:10:342
2603340993831,5cyclictest1264902-21kworker/u8:2+flush-8:010:25:211
2603339993832,4cyclictest2764366-21kworker/u8:3+events_unbound10:35:380
2603345993731,4cyclictest1704890-21systemd-journal08:11:362
2603340993733,3cyclictest1264902-21kworker/u8:2+events_unbound09:25:361
2603339993733,3cyclictest2644928-21kworker/u8:3+flush-8:008:35:430
2603339993731,4cyclictest1264902-21kworker/u8:2+events_unbound09:10:230
2603339993728,7cyclictest1704890-21systemd-journal07:30:000
2603345993631,4cyclictest1264902-21kworker/u8:2+events_unbound07:15:322
2603340993632,3cyclictest2834413-21kworker/u8:3+events_unbound11:45:351
2603339993632,3cyclictest2644928-21kworker/u8:3+events_unbound07:55:210
26030262363,9sleep10-21swapper/107:08:151
2603340993529,4cyclictest2854451-21kworker/u8:1+flush-8:011:25:321
2603340993529,4cyclictest1264902-21kworker/u8:2+flush-8:009:05:351
2603340993426,6cyclictest2551647-21kworker/u8:0+flush-8:008:05:341
2603345993328,4cyclictest1264902-21kworker/u8:2+events_unbound09:35:302
2603345993328,3cyclictest1264902-21kworker/u8:2+flush-8:008:35:332
2603340993329,3cyclictest2644928-21kworker/u8:3+events_unbound07:50:381
2603339993329,3cyclictest2644928-21kworker/u8:3+flush-8:008:10:370
2603345993226,4cyclictest2764366-21kworker/u8:3+events_unbound09:55:342
2603345993225,5cyclictest2685013-21apt-get08:30:002
2603340993228,3cyclictest2551647-21kworker/u8:0+flush-8:008:00:221
2603340993226,4cyclictest2863827-21kworker/u8:2+flush-8:011:55:231
2603340993225,5cyclictest2863827-21kworker/u8:2+flush-8:011:40:351
2603345993127,2cyclictest2814723-21aten2_r5power_v10:40:212
2603345993120,8cyclictest1704890-21systemd-journal10:10:012
2603340993126,3cyclictest2759157-21kworker/u8:0+flush-8:009:45:391
2603345993026,2cyclictest2675733-21fschecks_time08:20:222
2603345992925,3cyclictest2748939-21kworker/u8:3+events_unbound09:30:342
2603345992922,5cyclictest2804452-21kworker/u8:0+events_unbound11:10:242
2603345992919,8cyclictest2874305-21cron11:40:002
2603340992925,3cyclictest1264902-21kworker/u8:2+events_unbound08:35:271
2603340992924,4cyclictest2834413-21kworker/u8:3+events_unbound12:10:321
2603340992923,5cyclictest1264902-21kworker/u8:2+flush-8:010:45:231
2603345992824,2cyclictest2879240-21ls11:45:002
2603345992823,3cyclictest2730621-21fschecks_time09:15:242
2603340992824,3cyclictest2834413-21kworker/u8:3+events_unbound11:31:521
2603340992824,2cyclictest2855212-21irqrtprio11:20:251
2603340992824,2cyclictest2805284-21irqcore10:30:271
2603345992722,4cyclictest2863827-21kworker/u8:2+flush-8:012:35:352
2603340992722,4cyclictest2764366-21kworker/u8:3+flush-8:009:55:421
2603340992721,4cyclictest2804452-21kworker/u8:0+events_unbound11:05:351
2603340992719,6cyclictest2814610-21apt-get10:40:181
2603345992623,2cyclictest2914648-21fschecks_time12:20:222
2603345992622,3cyclictest2635293-21sendmail07:40:012
2603345992620,4cyclictest2758993-21grep09:40:362
2603345992620,4cyclictest2758993-21grep09:40:352
2603345992619,5cyclictest1704890-21systemd-journal11:30:002
2603345992617,7cyclictest1704890-21systemd-journal09:25:002
2603340992622,3cyclictest2789571-21kworker/u8:1+flush-8:010:20:221
2603340992622,2cyclictest2655170-21systemctl08:00:001
2603345992521,3cyclictest2904501-21fschecks_count12:10:232
2603345992521,2cyclictest2720200-21aten2_r5power_e09:05:222
2603345992521,2cyclictest2615777-21aten2_r5power_e07:20:212
2603340992521,2cyclictest0-21swapper/110:59:591
260334599249,3cyclictest371rcuc/211:05:272
260334599245,17cyclictest2854042-21munin-run11:20:002
2603345992420,2cyclictest2790041-21cpuspeed_turbos10:15:222
2603345992419,4cyclictest2834413-21kworker/u8:3+flush-8:012:25:492
2603345992419,4cyclictest2551647-21kworker/u8:0+flush-8:008:00:302
2603345992414,8cyclictest2645277-21awk07:49:592
260334599233,14cyclictest2799736-21apt-get10:25:192
2603345992320,2cyclictest2785089-21cpuspeed_turbos10:10:222
2603345992315,6cyclictest1704890-21systemd-journal08:45:002
2603340992319,2cyclictest0-21swapper/110:00:161
260334599222,14cyclictest2603514-21apt-get07:10:192
2603345992215,5cyclictest2690198-21sh08:35:002
2603345992215,5cyclictest1704890-21systemd-journal11:25:372
2603345992214,6cyclictest1704890-21systemd-journal10:55:002
2603345992212,7cyclictest1704890-21systemd-journal10:05:012
2603340992218,3cyclictest2863827-21kworker/u8:2+events_unbound12:35:271
2603345992117,2cyclictest0-21swapper/211:54:592
2603345992113,6cyclictest2857950-21tr11:20:292
26028462212,3sleep00-21swapper/007:05:520
28448692200,3chrt75-21kworker/3:1+events11:10:243
2603345992017,2cyclictest2879824-21fschecks_time11:45:212
2603345992017,2cyclictest0-21swapper/209:00:002
2603345992016,3cyclictest2765187-21cpuspeed_turbos09:50:202
2603345992015,3cyclictest2834809-21fschecks_time11:00:222
2603345991915,2cyclictest2814313-21sh10:40:012
2603345991915,2cyclictest2625393-21journal-offline07:30:012
2603345991915,2cyclictest0-21swapper/212:05:322
2603345991915,2cyclictest0-21swapper/211:55:272
2603345991912,5cyclictest2661817-21kthreadcore08:05:272
2603345991911,6cyclictest2924966-21sed12:30:262
25984982194,10sleep20-21swapper/207:05:152
2603345991815,2cyclictest2715470-21fschecks_count09:00:232
2603345991811,5cyclictest2704203-21sshd08:45:352
2603345991810,6cyclictest2626556-21cut07:30:272
2603345991713,2cyclictest0-21swapper/207:51:142
260334599168,6cyclictest2795585-21sed10:20:262
2603345991613,2cyclictest0-21swapper/209:26:372
2603345991611,3cyclictest0-21swapper/212:05:002
260334599161,12cyclictest2819811-21df_inode10:45:212
29286682144,6sleep30-21swapper/312:32:373
27799122142,8sleep30-21swapper/310:05:203
27238522142,8sleep30-21swapper/309:05:323
26855182142,8sleep30-21swapper/308:30:213
28151062133,6sleep30-21swapper/310:40:283
27738572132,7sleep30-21swapper/309:55:363
27249092132,6sleep30-21swapper/309:10:013
27001112132,6sleep30-21swapper/308:45:013
26903862132,6sleep30-21swapper/308:35:023
26652812132,6sleep30-21swapper/308:10:023
26212232132,7sleep30-21swapper/307:25:273
26154122132,6sleep30-21swapper/307:20:003
29314572122,6sleep30-21swapper/312:35:303
29228142123,6sleep30-21swapper/312:25:293
29143382122,6sleep30-21swapper/312:20:213
29100302122,6sleep30-21swapper/312:15:273
29039552122,5sleep30-21swapper/312:10:013
28941382122,6sleep30-21swapper/312:00:023
28897442122,6sleep30-21swapper/311:55:243
28880282120,8sleep30-21swapper/311:50:303
28693962122,5sleep30-21swapper/311:35:013
28545082122,6sleep30-21swapper/311:20:203
28529592122,6sleep30-21swapper/311:15:303
28431802122,6sleep30-21swapper/311:05:323
28298552122,6sleep30-21swapper/310:55:243
28093792122,5sleep30-21swapper/310:35:023
28055782122,6sleep30-21swapper/310:30:273
27996082122,6sleep30-21swapper/310:25:013
27747062122,6sleep30-21swapper/310:00:023
27597912123,6sleep30-21swapper/309:45:013
27560202122,6sleep30-21swapper/309:40:283
27560202122,6sleep30-21swapper/309:40:273
27546002123,6sleep30-21swapper/309:37:273
27489822122,7sleep30-21swapper/309:30:353
27352312122,6sleep30-21swapper/309:20:213
27349222122,5sleep30-21swapper/309:20:013
27151582122,5sleep30-21swapper/309:00:023
26956612122,6sleep30-21swapper/308:40:233
26754942122,6sleep30-21swapper/308:20:203
26608462122,6sleep30-21swapper/308:05:233
26460132122,6sleep30-21swapper/307:50:263
26403312122,5sleep30-21swapper/307:45:023
26355852122,6sleep30-21swapper/307:40:203
26304982122,5sleep30-21swapper/307:35:013
26161452122,6sleep30-21swapper/307:20:263
26033182122,5sleep30-21swapper/307:10:023
29036272112,6sleep30-21swapper/312:06:073
28827482112,5sleep30-21swapper/311:45:293
28746792112,5sleep30-21swapper/311:40:233
28645972112,6sleep30-21swapper/311:30:043
28593972112,5sleep30-21swapper/311:25:023
28342322112,4sleep30-21swapper/311:00:013
28244992112,5sleep30-21swapper/310:50:033
28241072112,6sleep30-21swapper/310:47:573
27900652112,5sleep30-21swapper/310:15:233
27695272112,6sleep30-21swapper/309:53:123
27148062112,6sleep30-21swapper/308:58:453
27058162112,5sleep30-21swapper/308:50:273
26846002112,5sleep30-21swapper/308:25:393
26709712112,5sleep30-21swapper/308:15:283
26554022112,5sleep30-21swapper/308:00:033
26508822112,5sleep30-21swapper/307:55:253
27952222102,5sleep30-21swapper/310:20:253
26256002102,5sleep30-21swapper/307:30:083
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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