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2026-05-13 - 19:17

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 Wed May 13, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24990772880,1sleep02499080-21cut07:41:020
26137092700,4chrt0-21swapper/309:36:013
2464947996763,3cyclictest2521294-21kworker/u8:2+events_unbound10:36:090
2464947996659,5cyclictest2506423-21kworker/u8:0+events_unbound09:40:550
2464947996559,5cyclictest2521294-21kworker/u8:2+events_unbound08:11:030
2464947996552,4cyclictest2506423-21kworker/u8:0+events_unbound08:26:090
2464947996459,3cyclictest2432967-21kworker/u8:3+events_unbound07:56:080
2464947996456,6cyclictest2695167-21kworker/u8:3+events_unbound11:31:030
2464947996359,3cyclictest2506423-21kworker/u8:0+events_unbound09:51:040
2464954996249,10cyclictest2669245-21ntpq10:31:022
2464947996256,4cyclictest2654544-21kworker/u8:0+events_unbound11:15:560
2464954996155,4cyclictest2654544-21kworker/u8:0+events_unbound12:21:022
2464947996157,3cyclictest2110512-21kworker/u8:1+events_unbound07:21:100
2464947996156,3cyclictest2749286-21kworker/u8:1+events_unbound12:25:580
2464947996155,5cyclictest2630532-21kworker/u8:3+events_unbound10:16:070
2464947996155,4cyclictest2620660-21kworker/u8:1+events_unbound10:01:100
2464950996055,4cyclictest2695167-21kworker/u8:3+events_unbound11:11:031
2464947996056,3cyclictest2654544-21kworker/u8:0+flush-8:012:06:090
2464947996054,4cyclictest2432967-21kworker/u8:3+events_unbound07:31:080
2464954995954,4cyclictest2749286-21kworker/u8:1+flush-8:011:56:032
2464950995955,3cyclictest2654544-21kworker/u8:0+events_unbound12:20:001
2464950995953,5cyclictest2546193-21kworker/u8:3+flush-8:008:41:031
2464947995955,3cyclictest2506423-21kworker/u8:0+events_unbound07:50:530
2464947995953,5cyclictest2546193-21kworker/u8:3+events_unbound08:35:530
2464947995854,3cyclictest2695167-21kworker/u8:3+flush-8:011:51:050
2464947995853,4cyclictest2654544-21kworker/u8:0+events_unbound10:51:060
2464947995852,4cyclictest2620660-21kworker/u8:1+events_unbound10:06:090
2464947995852,4cyclictest2620660-21kworker/u8:1+events_unbound10:06:090
2464947995852,4cyclictest2585482-21kworker/u8:1+events_unbound09:15:550
2464947995852,4cyclictest2432967-21kworker/u8:3+events_unbound07:46:060
2464947995753,3cyclictest2778401-21kworker/u8:3+events_unbound12:35:560
2464947995753,3cyclictest2546193-21kworker/u8:3+events_unbound08:31:080
2464947995753,3cyclictest2521294-21kworker/u8:2+flush-8:010:26:100
2464947995752,3cyclictest2654544-21kworker/u8:0+events_unbound12:16:110
2464954995649,4cyclictest2724342-21kworker/u8:1+events_unbound11:36:042
2464947995652,3cyclictest2783346-21kworker/u8:0+events_unbound12:31:090
2464947995652,3cyclictest2110512-21kworker/u8:1+events_unbound07:16:120
25067962550,2sleep3481ktimers/307:50:523
2464950995549,4cyclictest2521294-21kworker/u8:2+flush-8:010:41:101
2464947995551,3cyclictest2749286-21kworker/u8:1+flush-8:012:01:090
2464947995551,3cyclictest2506423-21kworker/u8:0+events_unbound09:11:020
2464947995550,4cyclictest2704814-21kworker/u8:2+events_unbound11:21:070
2464947995550,3cyclictest2654544-21kworker/u8:0+events_unbound12:10:560
2464947995450,3cyclictest2546193-21kworker/u8:3+flush-8:008:41:050
2464947995450,3cyclictest2521294-21kworker/u8:2+flush-8:008:21:110
2464947995450,3cyclictest2506423-21kworker/u8:0+events_unbound08:46:110
2464947995448,4cyclictest2521294-21kworker/u8:2+events_unbound09:06:060
2464947995446,6cyclictest2654544-21kworker/u8:0+flush-8:011:01:040
2464954995348,4cyclictest2695167-21kworker/u8:3+flush-8:011:01:112
2464954995246,4cyclictest2704814-21kworker/u8:2+flush-8:011:25:562
2464950995245,5cyclictest2521294-21kworker/u8:2+flush-8:009:36:071
2464947995248,3cyclictest2695167-21kworker/u8:3+flush-8:011:11:090
2464947995248,3cyclictest2620660-21kworker/u8:1+events_unbound10:11:080
2464947995248,3cyclictest2521294-21kworker/u8:2+events_unbound09:31:080
2464947995247,3cyclictest2654544-21kworker/u8:0+events_unbound11:45:540
2464947995247,3cyclictest2654544-21kworker/u8:0+events_unbound11:45:530
2464947995247,3cyclictest2521294-21kworker/u8:2+events_unbound10:46:030
2464950995145,4cyclictest2486891-21apt-get07:30:501
2464947995147,3cyclictest2778401-21kworker/u8:3+flush-8:012:21:100
2464947995147,3cyclictest2506423-21kworker/u8:0+events_unbound08:01:080
2464947995146,4cyclictest2620660-21kworker/u8:1+flush-8:009:46:100
2464950995045,3cyclictest2680535-21kworker/u8:1+flush-8:010:56:041
2464947995045,4cyclictest2724342-21kworker/u8:1+events_unbound11:35:520
2464950994944,4cyclictest2654544-21kworker/u8:0+events_unbound12:11:081
2464950994944,4cyclictest2506423-21kworker/u8:0+flush-8:008:16:101
2464950994942,5cyclictest2521294-21kworker/u8:2+events_unbound08:55:541
2464950994942,5cyclictest2475911-21ntpq07:16:091
2464950994940,7cyclictest280-21systemd-journal09:22:231
2464947994945,3cyclictest2506423-21kworker/u8:0+events_unbound08:16:080
2464947994945,3cyclictest2432967-21kworker/u8:3+events_unbound07:26:090
2464950994843,4cyclictest2422867-21kworker/u8:2+flush-8:007:36:091
2464950994841,5cyclictest2654544-21kworker/u8:0+flush-8:010:51:101
2464947994842,5cyclictest2521294-21kworker/u8:2+events_unbound09:00:550
2464950994741,4cyclictest2521294-21kworker/u8:2+flush-8:010:35:561
2464950994737,8cyclictest2581432-21diskstats09:05:551
2464947994743,3cyclictest2630532-21kworker/u8:3+events_unbound09:56:070
2464954994642,3cyclictest2654544-21kworker/u8:0+flush-8:011:06:062
2464954994641,4cyclictest2546193-21kworker/u8:3+flush-8:008:36:042
2464954994636,4cyclictest2778401-21kworker/u8:3+events_unbound12:36:012
2464950994641,4cyclictest2110512-21kworker/u8:1+events_unbound07:21:121
2464947994640,4cyclictest2521294-21kworker/u8:2+events_unbound09:26:050
2464947994635,8cyclictest280-21systemd-journal12:00:010
2464950994541,3cyclictest2585482-21kworker/u8:1+events_unbound09:16:091
2464950994537,6cyclictest2526547-21apt-get08:10:501
2464950994537,6cyclictest2506423-21kworker/u8:0+flush-8:007:51:041
2464947994541,3cyclictest2521294-21kworker/u8:2+events_unbound08:56:090
2464950994439,4cyclictest2620660-21kworker/u8:1+events_unbound10:00:551
2464950994439,3cyclictest2783346-21kworker/u8:0+flush-8:012:31:061
2464950994437,5cyclictest2546283-21apt-get08:30:511
2464954994332,9cyclictest2604666-21ntpq09:26:042
2464950994337,4cyclictest2521294-21kworker/u8:2+flush-8:009:26:031
2464950994335,6cyclictest280-21systemd-journal11:47:221
2464950994335,6cyclictest280-21systemd-journal11:47:221
2464950994335,6cyclictest2561359-21apt-get08:45:511
2464947994340,2cyclictest2521294-21kworker/u8:2+events_unbound10:20:530
2464947994339,3cyclictest2521294-21kworker/u8:2+events_unbound09:36:090
2464947994337,4cyclictest2654544-21kworker/u8:0+events_unbound11:41:070
2464950994236,4cyclictest2778317-21ntpq12:21:031
2464947994238,3cyclictest2521294-21kworker/u8:2+events_unbound10:41:070
2464947994238,3cyclictest2506423-21kworker/u8:0+flush-8:008:51:080
2464947994238,3cyclictest2432967-21kworker/u8:3+events_unbound07:11:090
2464950994136,4cyclictest2422867-21kworker/u8:2+flush-8:007:41:071
2464950994135,4cyclictest20977-21cron09:55:001
2464950994134,5cyclictest2654544-21kworker/u8:0+flush-8:011:41:021
2464947994136,4cyclictest2680535-21kworker/u8:1+events_unbound10:59:220
2464950994035,4cyclictest2654544-21kworker/u8:0+events_unbound10:31:121
2464950994032,6cyclictest2506423-21kworker/u8:0+flush-8:008:51:051
2464954993933,4cyclictest2422867-21kworker/u8:2+flush-8:007:46:102
2464954993930,7cyclictest280-21systemd-journal12:35:002
2464950993931,6cyclictest280-21systemd-journal07:58:231
2464950993930,4cyclictest2432967-21kworker/u8:3+events_unbound07:45:551
2464947993932,5cyclictest2521294-21kworker/u8:2+events_unbound09:20:530
2464950993834,3cyclictest2630532-21kworker/u8:3+flush-8:009:56:101
2464950993833,3cyclictest2585482-21kworker/u8:1+events_unbound09:11:071
2464950993832,4cyclictest2654544-21kworker/u8:0+events_unbound12:06:051
2464950993831,5cyclictest2620660-21kworker/u8:1+flush-8:010:06:061
2464950993831,5cyclictest2620660-21kworker/u8:1+flush-8:010:06:061
2464950993831,5cyclictest2521593-21apt-get08:05:511
2464950993829,6cyclictest2521294-21kworker/u8:2+flush-8:009:31:051
24646852383,11sleep10-21swapper/107:08:571
2464954993733,3cyclictest2695167-21kworker/u8:3+events_unbound11:51:042
2464950993731,4cyclictest2704814-21kworker/u8:2+events_unbound11:21:051
2464950993731,4cyclictest2506423-21kworker/u8:0+flush-8:008:26:071
2464950993729,6cyclictest2654544-21kworker/u8:0+flush-8:011:16:071
2464950993729,6cyclictest2506423-21kworker/u8:0+flush-8:009:41:081
2464947993733,3cyclictest2521294-21kworker/u8:2+events_unbound08:05:560
2464947993733,3cyclictest2422867-21kworker/u8:2+events_unbound07:36:120
2464947993732,3cyclictest2724342-21kworker/u8:1+events_unbound11:28:390
2464954993629,5cyclictest280-21systemd-journal10:04:222
2464947993629,5cyclictest2654544-21kworker/u8:0+events_unbound11:05:520
272000623525,5sleep30-21swapper/311:25:533
25137662350,6sleep3451irq_work/307:56:013
2464954993529,4cyclictest2422867-21kworker/u8:2+flush-8:007:26:022
2464954993527,6cyclictest280-21systemd-journal08:55:012
2464950993530,4cyclictest2432967-21kworker/u8:3+flush-8:008:01:041
2464950993527,6cyclictest2720002-21apt-get11:25:511
2464950993426,6cyclictest2695167-21kworker/u8:3+flush-8:011:31:061
2464950993329,3cyclictest2521294-21kworker/u8:2+flush-8:009:01:091
2464950993328,4cyclictest2778401-21kworker/u8:3+flush-8:012:35:571
2464950993328,4cyclictest2630532-21kworker/u8:3+flush-8:010:15:561
246458023322,6sleep30-21swapper/307:07:353
2464954993224,5cyclictest280-21systemd-journal10:15:232
2464950993225,5cyclictest2695221-21apt-get11:00:501
2464950993127,3cyclictest2620660-21kworker/u8:1+events_unbound09:45:551
2464950993125,4cyclictest2660258-21kworker/u8:3+flush-8:010:45:531
2464950993124,5cyclictest2749286-21kworker/u8:1+flush-8:012:01:061
2464950993122,6cyclictest2734731-21latency_hist11:40:011
26294552300,3sleep20-21swapper/209:51:052
2464954993026,2cyclictest2470097-21fschecks_count07:15:012
2464954993022,6cyclictest2715375-21fschecks_time11:20:542
2464950993026,2cyclictest2541038-21munin-plugin-st08:24:591
2464950993024,4cyclictest2695167-21kworker/u8:3+events_unbound11:50:531
2464950993023,5cyclictest2432967-21kworker/u8:3+events_unbound07:10:561
2464954992924,3cyclictest2586409-21fschecks_count09:10:532
2464954992923,4cyclictest2714709-21sendmail11:20:002
2464954992923,4cyclictest2507036-21fschecks_time07:50:532
2464954992922,2cyclictest161rcu_preempt10:51:012
2464954992921,6cyclictest2561709-21fschecks_time08:45:562
2464954992918,9cyclictest2541597-21diskstats08:25:562
2464954992916,2cyclictest421rcuog/210:45:592
2464950992924,4cyclictest2521294-21kworker/u8:2+events_unbound10:21:071
2464950992921,6cyclictest2620660-21kworker/u8:1+events_unbound10:26:021
2464947992925,3cyclictest2654544-21kworker/u8:0+events_unbound10:30:530
24646122292,6sleep00-21swapper/007:08:000
2464954992822,4cyclictest2770581-21kthreadcore12:16:002
2464954992820,6cyclictest2675702-21fschecks_count10:40:542
2464954992820,6cyclictest2635259-21apt-get10:00:002
2464950992825,2cyclictest2654544-21kworker/u8:0+events_unbound11:05:541
2464950992823,3cyclictest2482546-21irqcore07:25:591
2464954992621,3cyclictest2556247-21aten2_r5power_e08:40:512
2464954992621,3cyclictest2512055-21fschecks_time07:55:572
2464954992620,4cyclictest2670751-21fschecks_count10:35:552
2464954992620,4cyclictest2646069-21fschecks_time10:10:552
2464954992620,4cyclictest2516944-21fschecks_count08:00:552
2464954992620,2cyclictest161rcu_preempt12:26:002
2464950992620,5cyclictest2620660-21kworker/u8:1+flush-8:010:11:051
246495499252,2cyclictest421rcuog/208:15:522
2464954992520,3cyclictest2690504-21cpuspeed_turbos10:55:522
2464954992520,3cyclictest2641051-21fschecks_count10:05:562
2464954992520,3cyclictest2641051-21fschecks_count10:05:562
2464954992520,3cyclictest2611154-21fschecks_time09:35:562
2464954992520,3cyclictest2575510-21unixbench_multi08:56:122
2464954992520,3cyclictest2536705-21fschecks_count08:20:562
2464954992520,3cyclictest2487181-21fschecks_count07:30:562
2464954992519,4cyclictest2550577-21head08:31:122
2464954992519,4cyclictest2481243-21unixbench_multi07:21:122
2464954992516,7cyclictest2465479-21fschecks_time07:10:572
246471122517,5sleep20-21swapper/207:09:182
2464954992419,4cyclictest2724342-21kworker/u8:1+flush-8:011:30:432
2464954992418,4cyclictest2660836-21fschecks_count10:25:552
2464954992418,4cyclictest2576599-21fschecks_time09:00:552
246495499240,12cyclictest2658163-21kthreadcore10:21:002
2464950992420,2cyclictest2784152-21basename12:30:001
25878532230,2sleep375-21kworker/3:1+mm_percpu_wq09:10:573
246495499234,7cyclictest521rcuop/311:11:042
2464954992320,2cyclictest2764049-21unixbench_singl12:06:102
2464954992320,2cyclictest2735118-21aten2_r5power_e11:40:542
2464954992318,3cyclictest2744266-21unixbench_multi11:46:112
2464954992318,3cyclictest2744266-21unixbench_multi11:46:102
2464954992316,2cyclictest161rcu_preempt08:05:572
246495499231,2cyclictest421rcuog/212:10:512
2464950992318,4cyclictest2654544-21kworker/u8:0+events_unbound11:55:551
246495499213,8cyclictest0-21swapper/207:40:542
2464954992118,2cyclictest2492223-21fschecks_time07:35:572
2464954992117,2cyclictest0-21swapper/209:20:002
246495499210,10cyclictest2757721-21kthreadcore12:01:002
246495499202,7cyclictest0-21swapper/209:21:002
2464954992011,7cyclictest2526770-21cpuspeed_turbos08:10:532
2464950992016,2cyclictest0-21swapper/108:36:091
27782672190,2sleep3481ktimers/312:21:013
246495499193,6cyclictest0-21swapper/209:30:042
246495499191,8cyclictest0-21swapper/209:40:552
2464954991914,3cyclictest0-21swapper/209:46:012
26754392182,10sleep30-21swapper/310:40:513
25451512188,6sleep30-21swapper/308:26:073
2464954991813,3cyclictest0-21swapper/209:05:562
24730182170,2chrt481ktimers/307:16:013
26655062162,9sleep30-21swapper/310:30:523
27849722156,5sleep30-21swapper/312:30:583
26258732143,8sleep30-21swapper/309:50:553
27649472132,7sleep30-21swapper/312:10:563
27594712132,6sleep30-21swapper/312:05:013
26850152132,6sleep30-21swapper/310:50:013
25750362132,7sleep30-21swapper/308:56:063
25053422132,7sleep30-21swapper/307:46:033
27940292122,6sleep30-21swapper/312:36:243
27804442122,6sleep30-21swapper/312:26:003
27710442122,6sleep30-21swapper/312:16:013
27438802123,6sleep30-21swapper/311:46:083
27438802123,6sleep30-21swapper/311:46:083
27350662122,6sleep30-21swapper/311:40:543
27338292122,6sleep30-21swapper/311:36:053
27160942122,6sleep30-21swapper/311:20:593
27143692122,6sleep30-21swapper/311:16:143
27054842123,6sleep30-21swapper/311:10:573
26704662122,6sleep30-21swapper/310:35:533
26610452122,6sleep30-21swapper/310:25:583
26556142122,6sleep30-21swapper/310:20:533
26551372122,6sleep30-21swapper/310:18:233
26461422123,5sleep30-21swapper/310:10:573
26416692122,6sleep30-21swapper/310:06:003
26416692122,6sleep30-21swapper/310:05:593
26403312122,6sleep30-21swapper/310:03:233
26204282122,5sleep30-21swapper/309:45:013
26190272122,6sleep30-21swapper/309:41:043
26058872122,7sleep30-21swapper/309:30:523
26055512122,6sleep30-21swapper/309:30:003
25947672123,6sleep30-21swapper/309:16:033
25764902122,6sleep30-21swapper/309:00:553
25663172122,7sleep30-21swapper/308:50:523
25613912122,6sleep30-21swapper/308:45:543
25507052122,6sleep30-21swapper/308:32:383
25212932122,5sleep30-21swapper/308:05:013
25011592122,6sleep30-21swapper/307:41:143
24958682122,6sleep30-21swapper/307:36:113
24866352122,6sleep30-21swapper/307:30:023
24857912122,6sleep30-21swapper/307:26:093
24775262122,6sleep30-21swapper/307:20:583
24687382121,7sleep30-21swapper/307:11:043
27566642111,6sleep30-21swapper/312:01:003
27508092112,5sleep30-21swapper/311:55:593
27446772112,5sleep30-21swapper/311:50:003
27251212112,5sleep30-21swapper/311:30:513
27001082112,5sleep30-21swapper/311:05:023
26978872112,5sleep30-21swapper/311:01:013
26902902112,6sleep30-21swapper/310:55:523
26803192112,6sleep30-21swapper/310:45:323
25964082112,5sleep30-21swapper/309:20:573
25561402112,5sleep30-21swapper/308:40:333
25511912112,5sleep30-21swapper/308:35:513
25363212112,5sleep30-21swapper/308:20:023
25317902112,5sleep30-21swapper/308:15:573
25267952112,5sleep30-21swapper/308:10:543
25204932112,5sleep30-21swapper/308:01:083
26305292102,5sleep30-21swapper/309:55:043
25810932102,5sleep30-21swapper/309:05:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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