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2026-04-20 - 22:01
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rackeslot6.osadl.org (updated Mon Apr 20, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37463409910596,7cyclictest3754285-21latency_hist07:35:010
37463409910292,8cyclictest3792778-21latency_hist09:35:000
3746341999686,7cyclictest3821965-21latency_hist11:05:011
3746341999284,6cyclictest3845066-21latency_hist12:15:011
3746340999081,6cyclictest3806030-21latency_hist10:15:010
3746340998677,6cyclictest3765458-21latency_hist08:10:010
3746341998577,6cyclictest3812403-21latency_hist10:35:011
3746340998174,5cyclictest3732450-21kworker/u8:0+events_unbound07:20:010
3746340997969,7cyclictest3747914-21latency_hist07:15:010
3746341997668,6cyclictest3784819-21latency_hist09:10:011
3746341997568,4cyclictest3821974-21apt-get11:05:031
3746341997566,7cyclictest3797542-21kworker/u8:1+flush-179:009:50:001
3746341997467,5cyclictest3831752-21kworker/u8:3+flush-179:011:40:001
3746340997467,5cyclictest3804444-21latency_hist10:10:010
3746341997264,6cyclictest3828590-21latency_hist11:25:011
3746341997160,9cyclictest1213033-21systemd-journal11:30:011
3746340997160,9cyclictest3775324-21kworker/u8:2+flush-179:009:00:000
3746340997062,5cyclictest3846666-21latency_hist12:20:010
3746341996947,19cyclictest1213033-21systemd-journal10:00:011
3746340996759,5cyclictest3786404-21latency_hist09:15:010
3746340996659,5cyclictest3783490-21apt-get09:05:120
3746340996656,8cyclictest1213033-21systemd-journal12:25:010
374634499650,62cyclictest0-21swapper/207:58:002
3746340996558,5cyclictest3795973-21latency_hist09:45:010
374634699630,55cyclictest0-21swapper/307:58:003
3746341996236,22cyclictest3826983-21sh11:20:001
3746341995952,5cyclictest3810815-21latency_hist10:30:011
3746341995852,4cyclictest3746042-21latency_hist07:10:031
3746341995649,6cyclictest3759756-21kworker/u8:0+flush-179:007:55:001
3746341995638,17cyclictest3814056-21kworker/u8:1+events_unbound11:15:001
3746340995648,6cyclictest3788055-21kworker/u8:0+flush-179:009:25:250
3746340995547,6cyclictest3780036-21latency_hist08:55:010
3746341995447,5cyclictest3797816-21apt-get09:50:121
3746341995447,5cyclictest3741309-21kworker/u8:3+flush-179:007:25:001
3746341995444,8cyclictest3812661-21apt-get10:35:131
3746344995349,2cyclictest0-21swapper/210:11:592
3746346995248,2cyclictest0-21swapper/310:11:583
3746341995245,5cyclictest3760709-21kworker/u8:3+flush-179:008:00:001
3746340995243,7cyclictest1213033-21systemd-journal08:45:000
3746340995243,7cyclictest1213033-21systemd-journal08:44:590
3746340995148,2cyclictest0-21swapper/007:22:590
3746340995140,9cyclictest1213033-21systemd-journal10:35:000
3746341995044,5cyclictest3814056-21kworker/u8:1+flush-179:010:55:241
3746341995040,8cyclictest3838629-21/usr/sbin/munin11:55:171
3746341994944,4cyclictest3848299-21kworker/u8:2+flush-179:012:35:251
374634199490,6cyclictest3768911-21grep08:20:011
374634199490,6cyclictest3768911-21grep08:20:011
3746340994939,8cyclictest3754523-21/usr/sbin/munin07:35:240
3746340994841,6cyclictest3834961-21latency_hist11:45:010
3746340994840,6cyclictest1213033-21systemd-journal12:29:020
4577091470,13ptp4l61490irq/134-eno1-TxRx-007:10:013
3746341994741,5cyclictest3769173-21apt-get08:20:101
3746341994740,5cyclictest3775272-21latency_hist08:40:021
3746341994739,6cyclictest1213033-21systemd-journal08:55:201
3746340994737,8cyclictest3751351-21/usr/sbin/munin07:25:240
3746340994737,8cyclictest3751351-21/usr/sbin/munin07:25:230
3746341994636,7cyclictest510-21rs:main1
3746341994626,18cyclictest714-21Xorg08:30:591
3746340994641,4cyclictest3759756-21kworker/u8:0+flush-179:007:55:240
3746340994637,6cyclictest1213033-21systemd-journal10:51:030
3746340994538,5cyclictest1213033-21systemd-journal11:58:030
3746340994535,8cyclictest3841594-21apt-get12:03:570
374634099450,43cyclictest3815600-21turbostat10:49:550
3746341994436,6cyclictest3814056-21kworker/u8:1+events_unbound11:35:001
3746341994436,5cyclictest3788525-21kworker/u8:3+flush-179:009:20:261
3746341994427,15cyclictest3817213-21systemd-run10:50:001
3746341994426,15cyclictest0-21swapper/111:45:031
374634199441,40cyclictest3759087-21cron07:50:011
3746340994439,4cyclictest3768871-21kworker/u8:1+flush-179:008:25:260
374634099441,39cyclictest3830211-21true11:30:010
3746341994338,4cyclictest3848299-21kworker/u8:2+events_unbound12:35:011
3746341994334,7cyclictest1213033-21systemd-journal07:36:031
3746341994333,8cyclictest3817438-21apt-get10:50:131
374634199431,41cyclictest714-21Xorg10:40:581
3746340994339,3cyclictest3836813-21munin-run11:50:000
3746340994339,3cyclictest3833413-21systemd-run11:40:000
3746340994337,5cyclictest3820377-21sendmail11:00:010
3746340994335,6cyclictest3800994-21apt-get10:00:000
3746341994217,23cyclictest484-21dbus-daemon10:10:001
374634199421,38cyclictest3843492-21perf12:10:001
3746340994236,5cyclictest1213033-21systemd-journal11:24:030
374634099421,39cyclictest3821980-21awk11:05:000
374634499410,1cyclictest0-21swapper/207:55:012
3746341994135,5cyclictest3831752-21kworker/u8:3+flush-179:011:50:211
3746341994127,13cyclictest0-21swapper/108:00:141
3746341994124,16cyclictest0-21swapper/107:30:011
3746341994124,16cyclictest0-21swapper/107:30:011
374634199412,33cyclictest0-21swapper/108:06:591
3746340994134,6cyclictest3783236-21munin-run09:05:000
3746340994134,5cyclictest3773672-21latency_hist08:35:000
3746340994133,6cyclictest3823807-21latency_hist11:10:010
374634099411,4cyclictest3825401-21turbostat11:19:550
3746346994034,5cyclictest3853058-21turbostat12:40:003
3746346994034,5cyclictest3775264-21turbostat08:40:013
374634699400,36cyclictest0-21swapper/308:57:003
3746344994036,2cyclictest0-21swapper/208:35:582
3746341994025,14cyclictest714-21Xorg07:31:591
374634199402,34cyclictest0-21swapper/110:14:591
374634199402,32cyclictest0-21swapper/108:51:591
3746341994022,15cyclictest3765975-21apt-get08:10:121
3746341994021,16cyclictest0-21swapper/109:40:001
3746340994029,9cyclictest3853057-21apt-get12:40:000
374634099401,37cyclictest714-21Xorg09:16:580
374634099400,38cyclictest3767315-21apt08:15:010
374634699390,4cyclictest3801003-21turbostat10:00:003
3746344993936,2cyclictest0-21swapper/211:14:592
374634499390,36cyclictest0-21swapper/212:29:562
374634499390,36cyclictest0-21swapper/208:34:592
374634499390,2cyclictest0-21swapper/208:57:002
3746341993935,2cyclictest714-21Xorg09:33:591
374634199393,31cyclictest0-21swapper/109:13:581
3746341993929,7cyclictest510-21rs:main1
374634199392,33cyclictest714-21Xorg08:44:001
374634199392,33cyclictest714-21Xorg08:43:591
3746341993917,19cyclictest0-21swapper/107:15:201
3746340993932,6cyclictest3809232-21munin-run10:25:010
3746340993931,7cyclictest3813839-21unixbench-2d10:35:270
3746340993917,12cyclictest3759091-21latency_hist07:50:020
3746340993916,7cyclictest0-21swapper/010:20:000
3746344993835,2cyclictest0-21swapper/208:08:592
3746344993834,2cyclictest0-21swapper/212:07:002
3746344993834,2cyclictest0-21swapper/211:24:552
374634499380,36cyclictest0-21swapper/207:43:002
374634499380,35cyclictest0-21swapper/212:40:002
3746341993833,4cyclictest3768955-21kworker/u8:3+events_unbound08:25:231
3746341993832,5cyclictest3820359-21kworker/u8:0+events_unbound11:45:011
374634199382,31cyclictest0-21swapper/112:03:581
374634199382,31cyclictest0-21swapper/109:00:101
3746341993819,17cyclictest0-21swapper/108:45:221
3746341993814,21cyclictest3846912-21sshd12:20:021
374634199381,29cyclictest0-21swapper/107:40:131
374634199380,2cyclictest714-21Xorg10:24:591
374634099384,14cyclictest0-21swapper/008:35:150
3746340993832,5cyclictest3751159-21kworker/u8:2+flush-179:007:45:000
3746340993831,5cyclictest3777126-21apt-get08:45:120
3746340993830,7cyclictest3793016-21/usr/sbin/munin09:35:250
3746346993734,2cyclictest0-21swapper/311:14:593
3746346993734,2cyclictest0-21swapper/308:49:583
374634699370,2cyclictest0-21swapper/311:39:593
3746344993733,2cyclictest0-21swapper/208:44:562
3746344993733,2cyclictest0-21swapper/208:44:562
3746344993733,2cyclictest0-21swapper/208:14:562
374634199374,25cyclictest2304-21lightdm-gtk-gre07:10:591
374634199373,26cyclictest2304-21lightdm-gtk-gre12:29:591
374634199372,12cyclictest3787371-21needreboot09:15:201
3746340993734,2cyclictest714-21Xorg08:04:580
3746340993734,2cyclictest0-21swapper/009:21:590
3746340993731,4cyclictest0-21swapper/011:53:590
3746340993728,7cyclictest3809852-21fschecks_time10:25:160
3746346993634,1cyclictest0-21swapper/311:27:593
3746346993634,1cyclictest0-21swapper/308:20:593
3746346993634,1cyclictest0-21swapper/308:05:593
3746346993632,2cyclictest0-21swapper/312:07:003
374634699360,35cyclictest0-21swapper/308:29:553
3746344993633,2cyclictest0-21swapper/211:29:552
3746344993633,2cyclictest0-21swapper/211:04:552
3746344993633,2cyclictest0-21swapper/210:22:592
374634499360,1cyclictest0-21swapper/211:34:562
374634199362,29cyclictest0-21swapper/109:44:591
374634199361,31cyclictest3807681-21munin-run10:20:011
374634199361,31cyclictest0-21swapper/112:15:141
374634099367,28cyclictest0-21swapper/009:51:590
3746340993633,2cyclictest714-21Xorg08:21:590
3746340993633,2cyclictest0-21swapper/011:32:590
3746340993631,4cyclictest3851296-21unixbench-2d12:30:260
3746340993631,3cyclictest3759725-21fschecks_time07:50:160
3746340993626,8cyclictest1213033-21systemd-journal10:05:010
3746340993610,11cyclictest0-21swapper/009:45:150
3746344993532,2cyclictest0-21swapper/211:53:002
3746344993532,2cyclictest0-21swapper/210:19:552
3746344993532,2cyclictest0-21swapper/208:49:542
3746344993531,2cyclictest0-21swapper/208:19:562
3746344993531,2cyclictest0-21swapper/208:19:552
3746346993432,1cyclictest0-21swapper/308:44:563
3746346993432,1cyclictest0-21swapper/308:44:553
3746344993431,2cyclictest0-21swapper/208:26:002
3746344993431,2cyclictest0-21swapper/208:23:592
3746344993430,2cyclictest0-21swapper/212:23:592
3746344993430,2cyclictest0-21swapper/210:06:592
374634099343,30cyclictest151ktimers/011:10:140
3746346993331,1cyclictest0-21swapper/311:24:553
3746346993331,1cyclictest0-21swapper/310:23:003
374634699330,2cyclictest0-21swapper/310:28:593
3746344993330,2cyclictest0-21swapper/210:45:592
3746344993329,2cyclictest0-21swapper/209:46:592
3746344993329,2cyclictest0-21swapper/207:18:582
374634099337,7cyclictest0-21swapper/010:40:130
3746346993230,1cyclictest0-21swapper/311:53:003
3746346993230,1cyclictest0-21swapper/311:04:553
3746346993230,1cyclictest0-21swapper/310:19:553
3746346993230,1cyclictest0-21swapper/308:14:563
3746344993228,2cyclictest0-21swapper/212:18:592
3746344993228,2cyclictest0-21swapper/212:14:552
3746344993228,2cyclictest0-21swapper/211:47:592
374634499320,30cyclictest0-21swapper/209:30:592
3746340993224,7cyclictest3842152-21apt-get12:05:090
3746340993223,7cyclictest3844141-21fschecks_time12:10:160
3746346993129,1cyclictest0-21swapper/312:18:593
374634699310,30cyclictest0-21swapper/309:30:583
374634499310,29cyclictest0-21swapper/207:10:132
3746340993125,4cyclictest714-21Xorg08:19:590
3746340993125,4cyclictest714-21Xorg08:19:580
3746346993028,1cyclictest0-21swapper/308:34:543
3746346993028,1cyclictest0-21swapper/308:19:563
3746346993028,1cyclictest0-21swapper/308:19:553
3746346993027,2cyclictest0-21swapper/311:15:143
3746346993027,2cyclictest0-21swapper/310:45:123
3746346993027,2cyclictest0-21swapper/310:07:003
3746346993027,2cyclictest0-21swapper/310:00:013
3746346993026,3cyclictest3812420-21turbostat10:35:003
374634699300,28cyclictest0-21swapper/310:50:143
374634699300,28cyclictest0-21swapper/309:40:123
3746344993027,2cyclictest0-21swapper/211:15:142
3746344993027,2cyclictest0-21swapper/210:00:012
374634499300,2cyclictest0-21swapper/209:15:142
374634499300,28cyclictest0-21swapper/210:50:142
374634499300,28cyclictest0-21swapper/209:40:122
374634499300,28cyclictest0-21swapper/208:50:122
374634499300,27cyclictest0-21swapper/207:35:592
3746346992927,1cyclictest0-21swapper/312:23:593
3746346992927,1cyclictest0-21swapper/309:47:003
3746346992927,1cyclictest0-21swapper/307:18:593
3746346992926,2cyclictest0-21swapper/312:14:553
3746346992926,2cyclictest0-21swapper/310:55:133
3746346992926,2cyclictest0-21swapper/308:50:143
374634699290,27cyclictest0-21swapper/312:00:133
374634699290,27cyclictest0-21swapper/310:35:153
374634699290,27cyclictest0-21swapper/309:35:143
3746344992925,2cyclictest0-21swapper/210:33:592
374634499290,2cyclictest0-21swapper/210:35:152
374634499290,27cyclictest0-21swapper/212:00:132
374634499290,27cyclictest0-21swapper/211:35:132
374634499290,27cyclictest0-21swapper/211:05:022
374634499290,27cyclictest0-21swapper/210:55:122
374634499290,27cyclictest0-21swapper/210:00:012
374634499290,27cyclictest0-21swapper/209:35:152
374634499290,27cyclictest0-21swapper/208:00:142
4577091280,7ptp4l441ktimers/307:40:013
3746346992826,1cyclictest0-21swapper/311:47:593
374634699280,2cyclictest0-21swapper/307:30:143
374634699280,27cyclictest0-21swapper/311:05:023
374634699280,27cyclictest0-21swapper/307:10:123
374634699280,21cyclictest0-21swapper/309:15:133
374634699280,1cyclictest0-21swapper/307:40:593
3746344992825,2cyclictest0-21swapper/209:12:592
3746344992825,2cyclictest0-21swapper/207:47:582
4577091270,6ptp4l61490irq/134-eno1-TxRx-012:35:003
3746346992725,1cyclictest0-21swapper/308:00:133
374634699270,26cyclictest0-21swapper/307:52:593
374634699270,25cyclictest0-21swapper/309:20:143
374634699270,25cyclictest0-21swapper/309:03:583
3746344992724,2cyclictest0-21swapper/211:55:142
3746344992724,2cyclictest0-21swapper/209:25:592
374634499270,25cyclictest0-21swapper/209:06:592
4577091260,6ptp4l441ktimers/312:00:013
4577091260,6ptp4l441ktimers/311:44:553
4577091260,6ptp4l441ktimers/310:44:563
4577091260,6ptp4l441ktimers/307:50:013
3746346992623,2cyclictest0-21swapper/309:13:003
374634699260,24cyclictest0-21swapper/312:25:123
374634499260,2cyclictest0-21swapper/210:29:002
374634499260,2cyclictest0-21swapper/209:21:592
374634499260,2cyclictest0-21swapper/209:03:592
374634499260,24cyclictest0-21swapper/211:43:592
4577091250,6ptp4l61490irq/134-eno1-TxRx-011:34:563
4577091250,6ptp4l61490irq/134-eno1-TxRx-007:30:013
4577091250,6ptp4l61490irq/134-eno1-TxRx-007:30:003
4577091250,6ptp4l441ktimers/307:25:013
4577091250,4ptp4l441ktimers/309:30:023
3746344992522,2cyclictest0-21swapper/212:30:132
3746344992522,2cyclictest0-21swapper/207:24:592
3746344992521,2cyclictest0-21swapper/209:53:002
4577091240,6ptp4l61490irq/134-eno1-TxRx-009:54:593
4577091240,4ptp4l441ktimers/309:09:553
3746344992420,2cyclictest0-21swapper/207:31:582
3746340992420,3cyclictest0-21swapper/007:10:030
3746344992117,2cyclictest0-21swapper/210:43:592
374634499129,2cyclictest0-21swapper/207:25:132
374634499129,2cyclictest0-21swapper/207:25:132
37463449930,2cyclictest0-21swapper/207:10:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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