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2026-09-10 - 19:06

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 Thu Sep 10, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
359859523090,4sleep30-21swapper/310:14:133
36971242760,2chrt75-21kworker/3:1-events11:54:123
36127492570,4sleep10-21swapper/110:29:121
3414434995348,3cyclictest3610493-21kworker/u8:3+events_unbound10:30:010
3414437995145,4cyclictest3635266-21kworker/u8:2+events_unbound11:24:221
3414434995147,3cyclictest3535852-21kworker/u8:3+events_unbound09:54:100
34706902470,2chrt451irq_work/308:04:183
36356212460,5chrt0-21swapper/310:54:063
3414437994641,4cyclictest3390044-21kworker/u8:2+events_unbound07:25:011
3414434994640,4cyclictest3635266-21kworker/u8:2+flush-8:012:24:060
3414434994639,5cyclictest3486126-21kworker/u8:1+flush-8:008:34:090
3414437994541,3cyclictest3520966-21kworker/u8:0+events_unbound09:39:111
3414434994541,3cyclictest2027469-21kworker/u8:0+events_unbound07:15:050
3414434994539,4cyclictest3540926-21kworker/u8:2+events_unbound09:39:230
3414437994436,6cyclictest3630288-21kworker/u8:0+flush-8:011:44:211
3414437994435,7cyclictest3704527-21latency_hist12:00:001
3414437994435,7cyclictest3704527-21latency_hist12:00:001
3414434994439,4cyclictest3540926-21kworker/u8:2+flush-8:009:20:000
34784942430,18sleep3451irq_work/308:14:133
34316382430,1chrt3431639-21acpi07:29:040
3414437994338,4cyclictest3540926-21kworker/u8:2+events_unbound09:49:071
3414437994338,4cyclictest3520966-21kworker/u8:0+flush-8:009:24:201
3414434994337,4cyclictest3630288-21kworker/u8:0+flush-8:010:54:220
3414434994333,7cyclictest3690227-21/usr/sbin/munin11:49:210
3414437994137,3cyclictest3404738-21kworker/u8:3+events_unbound08:24:211
3414437994136,4cyclictest3390044-21kworker/u8:2+events_unbound07:34:181
3414437994136,3cyclictest3520966-21kworker/u8:0+flush-8:009:09:231
3414437994136,3cyclictest3486126-21kworker/u8:1+events_unbound08:49:171
3414434994136,4cyclictest3694856-21kworker/u8:1+events_unbound11:54:120
3414434994136,4cyclictest3630288-21kworker/u8:0+events_unbound11:15:010
3414437994035,3cyclictest3535852-21kworker/u8:3+events_unbound09:59:111
3414437994035,3cyclictest3535852-21kworker/u8:3+events_unbound09:59:111
3414437994033,5cyclictest3496223-21kworker/u8:2+flush-8:008:34:171
3414437994031,7cyclictest278-21systemd-journal10:49:101
3414437994030,8cyclictest278-21systemd-journal10:15:001
3414434994035,4cyclictest3595269-21kworker/u8:1+flush-8:010:14:120
340961524027,9sleep20-21swapper/207:05:082
3414437993934,4cyclictest3520966-21kworker/u8:0+flush-8:009:29:231
3414437993934,3cyclictest3635266-21kworker/u8:2+events_unbound12:14:071
3414437993932,5cyclictest3635266-21kworker/u8:2+flush-8:010:59:181
3414434993929,7cyclictest3705077-21/usr/sbin/munin12:04:230
3414434993928,9cyclictest278-21systemd-journal09:34:090
3414437993834,3cyclictest3635266-21kworker/u8:2+events_unbound12:34:101
3414437993832,5cyclictest3694856-21kworker/u8:1+events_unbound12:09:161
3414434993834,3cyclictest3678229-21kworker/u8:3+events_unbound12:19:100
3414434993834,3cyclictest3451201-21kworker/u8:0+flush-8:007:54:250
3414434993833,4cyclictest3404738-21kworker/u8:3+flush-8:008:04:110
3414434993830,6cyclictest3549840-21ntpq09:24:160
3414434993830,6cyclictest3426964-21diskstats07:24:070
3414439993730,5cyclictest3440959-21apt-get07:35:022
3414437993733,3cyclictest3530695-21kworker/u8:1+events_unbound09:14:111
3414437993733,3cyclictest3505384-21kworker/u8:0+flush-8:008:44:121
3414437993732,4cyclictest3404738-21kworker/u8:3+events_unbound08:29:211
3414437993732,3cyclictest3630288-21kworker/u8:0+events_unbound11:09:211
3414437993730,5cyclictest3605936-21tr10:24:071
3414437993725,9cyclictest278-21systemd-journal10:54:261
3414434993733,3cyclictest3580501-21kworker/u8:2+flush-8:010:44:240
3414434993732,3cyclictest3678229-21kworker/u8:3+events_unbound11:40:010
3414434993725,9cyclictest3734970-21/usr/sbin/munin12:34:220
3414437993632,3cyclictest3535852-21kworker/u8:3+events_unbound10:04:171
3414437993632,3cyclictest3466307-21kworker/u8:2+events_unbound08:14:211
3414437993632,2cyclictest3659991-21systemd-run11:15:011
3414437993631,4cyclictest3540926-21kworker/u8:2+flush-8:009:44:201
3414437993630,5cyclictest3630288-21kworker/u8:0+flush-8:011:34:081
3414434993630,4cyclictest3535852-21kworker/u8:3+flush-8:009:49:180
3414434993628,6cyclictest3440305-21ntpq07:34:140
3414437993531,3cyclictest3595269-21kworker/u8:1+flush-8:010:34:081
3414437993531,3cyclictest3535852-21kworker/u8:3+events_unbound09:19:101
3414437993529,4cyclictest3496223-21kworker/u8:2+events_unbound08:59:081
3414437993527,7cyclictest3496223-21kworker/u8:2+flush-8:009:04:181
3414434993530,4cyclictest3404738-21kworker/u8:3+events_unbound07:59:100
3414434993529,4cyclictest3694856-21kworker/u8:1+flush-8:012:09:220
3414434993528,5cyclictest3550884-40mandb09:27:090
3414434993523,2cyclictest161rcu_preempt08:14:180
3414437993429,4cyclictest3451201-21kworker/u8:0+events_unbound08:09:131
3414437993429,3cyclictest3699559-21ls11:55:001
3414437993429,3cyclictest3461332-21systemd-run07:55:001
3414437993428,5cyclictest3535852-21kworker/u8:3+flush-8:009:54:161
3414437993428,5cyclictest2027469-21kworker/u8:0+events_unbound07:15:031
3414437993428,4cyclictest3390044-21kworker/u8:2+flush-8:007:49:091
3414434993430,3cyclictest3486126-21kworker/u8:1+flush-8:008:39:130
3414434993429,4cyclictest3505384-21kworker/u8:0+events_unbound08:44:200
3414434993429,3cyclictest3595269-21kworker/u8:1+events_unbound10:24:110
3414434993429,3cyclictest3486126-21kworker/u8:1+events_unbound08:55:000
3414434993429,3cyclictest3486126-21kworker/u8:1+events_unbound08:55:000
3414434993428,4cyclictest3635266-21kworker/u8:2+flush-8:010:59:120
34097282344,9sleep10-21swapper/107:06:361
3414437993329,3cyclictest3404738-21kworker/u8:3+events_unbound07:29:201
3414437993327,5cyclictest2027469-21kworker/u8:0+events_unbound07:14:051
3414437993324,6cyclictest278-21systemd-journal10:18:091
3414434993328,3cyclictest3619589-21ntpq10:34:180
3414434993327,5cyclictest3635266-21kworker/u8:2+flush-8:011:19:160
3414434993327,4cyclictest3635266-21kworker/u8:2+flush-8:012:39:120
3414434993325,6cyclictest3625080-21latency_hist10:40:010
3414434993323,8cyclictest3491869-21diskstats08:29:070
3414439993227,3cyclictest3610098-21unixbench_multi10:24:232
3414437993228,2cyclictest3465694-21grep07:59:181
3414437993227,4cyclictest3678229-21kworker/u8:3+events_unbound12:19:141
3414437993227,4cyclictest3595269-21kworker/u8:1+events_unbound11:04:181
3414437993227,3cyclictest3486126-21kworker/u8:1+events_unbound08:54:121
3414437993227,3cyclictest3486126-21kworker/u8:1+events_unbound08:54:111
3414437993226,4cyclictest3729165-21kworker/u8:1+flush-8:012:29:131
3414437993226,4cyclictest3625087-21munin-run10:40:011
3414434993228,3cyclictest3535852-21kworker/u8:3+flush-8:009:59:080
3414434993228,3cyclictest3535852-21kworker/u8:3+flush-8:009:59:080
3414434993228,3cyclictest3451201-21kworker/u8:0+flush-8:008:24:120
3414434993227,4cyclictest3729165-21kworker/u8:1+events_unbound12:25:070
3414434993227,4cyclictest3580501-21kworker/u8:2+flush-8:010:19:130
3414434993125,4cyclictest3530695-21kworker/u8:1+flush-8:009:14:170
3414434993120,9cyclictest3718721-21ntpq12:14:180
3414437993026,3cyclictest3486126-21kworker/u8:1+events_unbound08:39:111
3414437993023,5cyclictest3729245-21apt-get12:25:001
3414434993026,2cyclictest3679092-21needreboot11:34:140
3414434993025,3cyclictest3520966-21kworker/u8:0+events_unbound09:09:070
3414434993021,7cyclictest3570363-21latency_hist09:45:000
34971062290,2sleep3471rcuc/308:34:113
3414437992924,4cyclictest3404738-21kworker/u8:3+events_unbound08:04:181
3414437992922,5cyclictest3481683-21apt-get08:19:041
3414434992925,3cyclictest3635266-21kworker/u8:2+events_unbound11:22:100
3414434992924,4cyclictest3481643-21sshd08:18:540
3414434992923,5cyclictest3649826-21kworker/u8:3+events_unbound11:05:010
3414434992923,4cyclictest3654918-21apt-config11:10:010
3414434992923,4cyclictest3404738-21kworker/u8:3+events_unbound07:44:050
341443499290,26cyclictest3441658-21sshd07:38:090
3414439992825,2cyclictest3654793-21cron11:10:002
3414439992825,2cyclictest3550390-21unixbench_singl09:24:242
3414439992824,3cyclictest3596288-21fschecks_time10:14:092
3414439992824,3cyclictest3456015-21unixbench_singl07:49:232
3414439992823,4cyclictest3451201-21kworker/u8:0+flush-8:008:09:102
3414437992824,3cyclictest3520966-21kworker/u8:0+flush-8:009:34:211
3414437992824,3cyclictest3404738-21kworker/u8:3+events_unbound07:38:091
3414437992822,4cyclictest278-21systemd-journal12:04:591
3414437992821,5cyclictest3625661-21apt-get10:44:051
3414434992824,3cyclictest3678229-21kworker/u8:3+flush-8:011:59:230
3414434992824,3cyclictest3678229-21kworker/u8:3+flush-8:011:59:230
3414439992724,2cyclictest3719220-21unixbench_singl12:14:242
3414439992723,3cyclictest3580228-21timerandwakeup09:54:222
3414439992723,2cyclictest3644898-21cron10:59:592
3414439992721,4cyclictest3440847-21unixbench_singl07:34:222
3414439992621,4cyclictest3530695-21kworker/u8:1+flush-8:009:14:212
341443999260,24cyclictest3664896-21cron11:20:002
341443999260,24cyclictest3505878-21cron08:40:002
3414437992621,3cyclictest3451172-21cron07:45:001
3414434992623,2cyclictest3496223-21kworker/u8:2+events_unbound08:55:060
3414434992622,3cyclictest3580501-21kworker/u8:2+flush-8:010:09:580
3414434992622,3cyclictest3496223-21kworker/u8:2+events_unbound09:04:060
3414439992522,2cyclictest3581153-21aten2_r5power_v09:59:062
3414439992522,2cyclictest3581153-21aten2_r5power_v09:59:062
3414437992521,2cyclictest3670771-21fschecks_time11:29:081
3414437992521,2cyclictest3664896-21cron11:20:001
3414437992514,7cyclictest3594762-21sshd10:09:171
3414434992520,3cyclictest3610493-21kworker/u8:3+events_unbound10:49:050
341443499251,7cyclictest3475702-21ps08:09:240
3414434992516,7cyclictest3456112-21apt-get07:50:000
3414439992421,2cyclictest3744293-21cron12:40:002
3414439992421,2cyclictest3611015-21tr10:29:062
3414439992421,2cyclictest3568126-21kthreadcore09:44:122
3414439992420,2cyclictest3655650-21aten2_r5power_e11:14:052
3414439992420,2cyclictest3645520-21aten2_r5power_c11:04:052
3414439992420,2cyclictest3561209-21cpuspeed_turbos09:39:062
3414439992420,2cyclictest3510856-21cron08:45:002
3414439992419,4cyclictest3678229-21kworker/u8:3+events_unbound12:25:032
3414437992420,3cyclictest3635266-21kworker/u8:2+events_unbound12:39:151
3414437992418,5cyclictest3678229-21kworker/u8:3+flush-8:011:39:261
341443499249,4cyclictest0-21swapper/011:29:440
3414434992420,3cyclictest3678229-21kworker/u8:3+events_unbound11:44:100
3414434992420,2cyclictest0-21swapper/007:14:140
3414439992320,2cyclictest3685645-21fschecks_time11:44:072
3414439992320,2cyclictest3415201-21fschecks_time07:14:082
3414439992319,2cyclictest3447114-21fschecks_time07:44:082
3414439992319,2cyclictest0-21swapper/207:20:002
3414439992317,4cyclictest3706027-21kthreadcore12:04:122
3414434992319,3cyclictest3486126-21kworker/u8:1+events_unbound08:49:130
3414434992314,2cyclictest3535852-21kworker/u8:3+events_unbound10:00:290
341443999228,2cyclictest37202712smartctl12:19:082
341443999222,14cyclictest3486661-21apt-get08:24:052
3414439992219,2cyclictest0-21swapper/212:35:002
3414439992218,2cyclictest3725085-21cpuspeed_turbos12:24:042
3414439992218,2cyclictest3481910-21tr08:19:072
3414439992217,4cyclictest3535852-21kworker/u8:3+flush-8:009:19:112
3414439992212,2cyclictest0-21swapper/208:14:182
3414437992219,2cyclictest1-21systemd11:50:001
3414439992118,2cyclictest3621040-21fschecks_time10:39:082
3414439992118,2cyclictest3615978-21tr10:34:062
3414439992118,2cyclictest3461958-21aten2_r5power_p07:59:062
3414439992117,2cyclictest3675599-21cpuspeed_turbos11:34:062
3414439992117,2cyclictest3516578-21cpuspeed_turbos08:54:062
3414439992117,2cyclictest3516578-21cpuspeed_turbos08:54:062
3414439992117,2cyclictest0-21swapper/210:44:252
3414439992117,2cyclictest0-21swapper/207:54:232
3414439992116,4cyclictest3520966-21kworker/u8:0+flush-8:008:59:182
3414439992112,7cyclictest3680781-21awk11:39:132
3414439992016,2cyclictest3586243-21cpuspeed_turbos10:04:082
3414439992016,2cyclictest0-21swapper/211:54:102
3414439992015,4cyclictest3635016-21turbostat.cron10:50:002
3414439992015,4cyclictest3630288-21kworker/u8:0+flush-8:011:49:182
3414439992015,3cyclictest3669851-21cron11:25:002
3414439992015,3cyclictest0-21swapper/212:10:002
341443499201,14cyclictest3414436-21latency_hist07:10:010
36885572190,3sleep375-21kworker/3:1+events11:44:133
341443999199,7cyclictest3467978-21tr08:04:112
3414439991916,2cyclictest3500892-21unixbench_singl08:34:242
3414439991915,3cyclictest3674931-21latency_hist11:30:022
341443999191,2cyclictest37043751unixbench_multi11:59:242
341443999191,2cyclictest37043751unixbench_multi11:59:232
3414439991814,2cyclictest0-21swapper/209:34:102
3414439991813,4cyclictest3486126-21kworker/u8:1+events_unbound08:50:002
34097102183,8sleep30-21swapper/307:06:213
341443999177,2cyclictest0-21swapper/210:09:042
3414439991712,3cyclictest0-21swapper/209:04:132
3414439991712,3cyclictest0-21swapper/208:29:102
341443999170,3cyclictest34316392acpi07:29:042
341443999167,7cyclictest3428646-21tr07:24:122
3414439991612,2cyclictest0-21swapper/209:49:152
341443999161,11cyclictest3635576-21apt-get10:54:042
3414439991610,4cyclictest0-21swapper/210:19:102
3414439991610,4cyclictest0-21swapper/209:09:122
341443999152,12cyclictest0-21swapper/209:28:092
36448962143,6sleep30-21swapper/311:00:013
35810462145,5sleep30-21swapper/309:59:063
35810462145,5sleep30-21swapper/309:59:063
35749702145,5sleep30-21swapper/309:49:193
35618602143,8sleep30-21swapper/309:39:123
36323012134,5sleep30-21swapper/310:49:133
36300432132,7sleep30-21swapper/310:45:013
35554482132,6sleep30-21swapper/309:30:013
35158182132,6sleep30-21swapper/308:50:013
35158182132,6sleep30-21swapper/308:50:013
34910732132,6sleep30-21swapper/308:25:013
37394182122,6sleep30-21swapper/312:35:023
37387082122,6sleep30-21swapper/312:34:173
37236312122,6sleep30-21swapper/312:19:163
37149532122,6sleep30-21swapper/312:14:073
37097622122,6sleep30-21swapper/312:06:083
36995892122,6sleep30-21swapper/311:55:013
36995892122,6sleep30-21swapper/311:55:013
36805952122,6sleep30-21swapper/311:39:123
36753522122,6sleep30-21swapper/311:34:033
36704232122,6sleep30-21swapper/311:29:053
36653302122,6sleep30-21swapper/311:22:233
36575292122,6sleep30-21swapper/311:14:133
36458672122,6sleep30-21swapper/311:04:103
36207302123,6sleep30-21swapper/310:39:063
36157482124,5sleep30-21swapper/310:34:043
36096062123,5sleep30-21swapper/310:24:173
36009002125,4sleep30-21swapper/310:19:043
35804142122,6sleep30-21swapper/309:54:243
35664792122,6sleep30-21swapper/309:44:093
35514302122,6sleep30-21swapper/309:29:093
35499182122,6sleep30-21swapper/309:24:193
35312392122,6sleep30-21swapper/309:09:073
35266502122,6sleep30-21swapper/309:04:093
35119402122,6sleep30-21swapper/308:49:143
35100852122,6sleep30-21swapper/308:44:153
34884102122,6sleep30-21swapper/308:24:133
34514102122,6sleep30-21swapper/307:45:053
34321752122,6sleep30-21swapper/307:29:123
34307252122,6sleep30-21swapper/307:24:233
34256142122,6sleep30-21swapper/307:19:213
37299912112,6sleep30-21swapper/312:28:513
37290072112,5sleep30-21swapper/312:24:233
37047772112,5sleep30-21swapper/312:00:113
36900992112,6sleep30-21swapper/311:47:233
36605062112,5sleep30-21swapper/311:19:063
36501762112,5sleep30-21swapper/311:06:103
36106692112,6sleep30-21swapper/310:27:523
35908952112,6sleep30-21swapper/310:08:013
35858872112,6sleep30-21swapper/310:02:393
35409642112,6sleep30-21swapper/309:17:093
35403722112,5sleep30-21swapper/309:14:243
35210962112,6sleep30-21swapper/308:56:483
35012402113,5sleep30-21swapper/308:35:323
34814752112,6sleep30-21swapper/308:16:473
34743802112,6sleep30-21swapper/308:09:163
34616402112,6sleep30-21swapper/307:56:253
34565842112,5sleep30-21swapper/307:50:113
34466742112,6sleep30-21swapper/307:43:173
34416082112,6sleep30-21swapper/307:37:313
34363112112,6sleep30-21swapper/307:30:533
34189632112,5sleep30-21swapper/307:14:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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