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2026-04-16 - 10:00
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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 highest latencies:
System rackeslot6.osadl.org (updated Thu Apr 16, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
379415099115103,10cyclictest3887502-40logrotate00:00:010
3794150999183,5cyclictest3840806-21latency_hist21:35:000
3794150998778,7cyclictest3894199-21latency_hist00:20:010
3794150998476,6cyclictest3892589-21latency_hist00:15:010
3794152998376,5cyclictest3890756-21apt-get00:10:031
3794150998276,4cyclictest3881189-21kworker/u8:3+events_unbound00:30:000
3794150998276,4cyclictest3857252-21kworker/u8:1+events_unbound00:04:000
3794150998168,11cyclictest266-21systemd-journal23:00:000
3794150997968,9cyclictest3805478-21latency_hist19:45:010
3794152997768,7cyclictest266-21systemd-journal22:00:001
3794152997569,5cyclictest3857252-21kworker/u8:1+flush-179:000:35:001
3794150997468,4cyclictest3791088-21kworker/u8:1+events_unbound19:10:240
3794152997362,8cyclictest266-21systemd-journal19:40:131
3794150997365,6cyclictest3850627-21latency_hist22:05:010
3794150997264,6cyclictest3882732-21latency_hist23:45:000
3794150997264,6cyclictest3882732-21latency_hist23:45:000
3794152997164,5cyclictest3834418-21kworker/u8:0+flush-179:021:35:211
3794150997164,5cyclictest3850662-21kworker/u8:3+flush-179:022:15:220
3794152997061,6cyclictest3826427-21latency_hist20:50:011
3794152996963,4cyclictest3881189-21kworker/u8:3+events_unbound00:00:221
3794152996961,6cyclictest3842459-21kworker/u8:1+flush-179:021:50:001
3794150996964,4cyclictest3878184-21kworker/u8:0+events_unbound23:40:010
3794150996962,5cyclictest3834418-21kworker/u8:0+events_unbound21:25:010
3794150996962,5cyclictest3797928-21kworker/u8:0+flush-179:019:20:210
4577091680,18ptp4l441ktimers/319:05:493
3794152996863,4cyclictest3881189-21kworker/u8:3+flush-179:000:05:221
3794152996762,4cyclictest3818452-21kworker/u8:1+flush-179:020:29:561
3794152996760,5cyclictest3849705-21kworker/u8:2+flush-179:022:10:011
3794152996760,5cyclictest3849705-21kworker/u8:2+flush-179:022:10:001
3794152996756,9cyclictest3872911-21apt-get23:15:001
3794152996756,9cyclictest3872911-21apt-get23:15:001
3794152996660,5cyclictest3791092-21kworker/u8:2+flush-179:019:29:591
3794152996559,4cyclictest3857252-21kworker/u8:1+flush-179:022:45:151
3794150996560,4cyclictest3811571-21kworker/u8:0+flush-179:020:55:250
3794150996558,6cyclictest3868094-21kworker/u8:0+flush-179:023:10:000
3794150996556,7cyclictest266-21systemd-journal22:15:010
3794152996459,4cyclictest3857252-21kworker/u8:1+flush-179:000:39:541
3794152996459,4cyclictest3817124-21/usr/sbin/munin20:20:231
3794150996453,9cyclictest3890756-21apt-get00:10:000
3794152996357,5cyclictest3834418-21kworker/u8:0+flush-179:021:50:201
3794152996357,4cyclictest3881189-21kworker/u8:3+flush-179:023:55:151
3794152996256,5cyclictest3811571-21kworker/u8:0+events_unbound21:00:251
3794152996256,4cyclictest3861823-21kworker/u8:2+events_unbound22:40:141
3794150996255,6cyclictest3857252-21kworker/u8:1+events_unbound23:20:010
3794150996255,5cyclictest3818452-21kworker/u8:1+flush-179:020:25:220
3794152996155,4cyclictest3849705-21kworker/u8:2+flush-179:022:00:211
3794152996155,4cyclictest3829710-21kworker/u8:3+events_unbound21:10:131
3794152996155,4cyclictest3811571-21kworker/u8:0+flush-179:020:54:551
3794150996155,4cyclictest3874819-21kworker/u8:3+flush-179:023:20:150
3794150996155,4cyclictest3857252-21kworker/u8:1+flush-179:023:10:210
3794150996155,4cyclictest3857252-21kworker/u8:1+flush-179:023:10:200
3794150996154,6cyclictest3823217-21kworker/u8:1+flush-179:020:55:010
3794152996055,4cyclictest3808375-21kworker/u8:1+flush-179:019:54:551
3794152996054,5cyclictest3878184-21kworker/u8:0+flush-179:023:34:551
3794150996055,4cyclictest3857252-21kworker/u8:1+flush-179:022:50:000
3794150996049,9cyclictest3845596-21apt-get21:49:590
3794152995953,4cyclictest3837043-21kworker/u8:3+flush-179:021:30:171
3794152995855,2cyclictest0-21swapper/121:44:581
3794152995853,3cyclictest3821614-21kworker/u8:2+flush-179:020:35:141
3794152995851,5cyclictest3893659-21kworker/u8:2+flush-179:000:25:211
3794150995854,3cyclictest3857252-21kworker/u8:1+flush-179:023:30:150
3794150995851,5cyclictest3857252-21kworker/u8:1+flush-179:022:30:220
3794150995851,5cyclictest3857252-21kworker/u8:1+flush-179:022:30:220
3794150995850,6cyclictest3808944-21kworker/u8:2+events_unbound20:05:140
3794152995752,3cyclictest3857252-21kworker/u8:1+flush-179:022:35:151
3794152995749,6cyclictest3805992-21apt-get19:45:111
3794152995651,4cyclictest3791092-21kworker/u8:2+flush-179:019:35:011
3794150995651,4cyclictest3857252-21kworker/u8:1+flush-179:000:30:160
3794152995551,3cyclictest3791092-21kworker/u8:2+flush-179:019:40:011
3794152995550,4cyclictest3837043-21kworker/u8:3+flush-179:021:24:551
3794150995550,4cyclictest3834418-21kworker/u8:0+flush-179:021:40:010
3794152995450,3cyclictest3826471-21kworker/u8:2+flush-179:020:59:561
3794150995445,7cyclictest266-21systemd-journal00:40:000
3794152995345,6cyclictest3850662-21kworker/u8:3+flush-179:022:20:211
3794152995345,6cyclictest3810499-21latency_hist20:00:011
3794150995346,5cyclictest3831262-21latency_hist21:05:010
3794152995247,4cyclictest3878184-21kworker/u8:0+flush-179:023:55:001
3794152995247,4cyclictest3874819-21kworker/u8:3+flush-179:023:24:561
3794152995246,4cyclictest3802003-21kworker/u8:3+flush-179:020:00:201
379415299511,15cyclictest3831522-21sshd21:05:131
3794150995146,4cyclictest3805534-21kworker/u8:0+flush-179:019:50:180
3794150995145,5cyclictest266-21systemd-journal00:20:140
3794150995145,4cyclictest3857249-21apt-get22:25:100
3794150995145,4cyclictest3834418-21kworker/u8:0+events_unbound22:00:020
3794152994937,11cyclictest3855359-21kworker/u8:0+flush-179:022:20:001
3794150994941,6cyclictest266-21systemd-journal19:20:000
231999490,17rtkit-daemon3870781-21ntp_states23:05:221
3794152994843,4cyclictest3797928-21kworker/u8:0+flush-179:019:20:201
3794152994842,4cyclictest3878184-21kworker/u8:0+flush-179:023:35:191
3794150994838,8cyclictest266-21systemd-journal20:20:010
3794150994739,6cyclictest3799087-21/usr/sbin/munin19:25:170
3794152994642,3cyclictest3857252-21kworker/u8:1+events_unbound23:00:201
3794150994642,3cyclictest3791092-21kworker/u8:2+flush-179:019:45:010
231999460,4rtkit-daemon2318-21rtkit-daemon20:20:190
3794152994539,4cyclictest3808944-21kworker/u8:2+flush-179:020:05:111
3794150994540,4cyclictest3811571-21kworker/u8:0+flush-179:020:10:220
3794150994539,4cyclictest3885903-21latency_hist23:55:010
3794150994535,8cyclictest3834418-21kworker/u8:0+events_unbound21:55:000
3794150994441,2cyclictest211irq_work/021:44:590
3794150994439,4cyclictest3823217-21kworker/u8:1+flush-179:020:45:180
3794150994438,4cyclictest3857252-21kworker/u8:1+flush-179:023:50:000
3794152994329,4cyclictest3881189-21kworker/u8:3+events_unbound23:40:151
3794152994329,4cyclictest3881189-21kworker/u8:3+events_unbound23:40:151
3794150994338,4cyclictest3832769-21kworker/u8:1+flush-179:021:15:150
3794150994337,4cyclictest3857252-21kworker/u8:1+flush-179:023:30:000
3794150994336,5cyclictest3802003-21kworker/u8:3+flush-179:019:35:160
3794155994238,2cyclictest0-21swapper/200:19:552
379415599420,40cyclictest0-21swapper/220:22:592
3794152994236,4cyclictest3837043-21kworker/u8:3+flush-179:021:25:101
3794152994234,5cyclictest0-21swapper/119:17:591
3794150994235,5cyclictest3832848-21latency_hist21:10:010
3794150994234,7cyclictest3866537-21munin-run22:55:000
3794155994137,2cyclictest0-21swapper/221:27:002
3794152994135,5cyclictest3893659-21kworker/u8:2+flush-179:000:20:211
3794150994137,3cyclictest0-21swapper/020:35:000
3794150994136,4cyclictest3857042-21latency_hist22:25:000
3794150994135,4cyclictest3834435-21latency_hist21:15:010
379415099410,39cyclictest714-21Xorg20:39:000
231999410,4rtkit-daemon2318-21rtkit-daemon19:10:331
3794157994037,2cyclictest0-21swapper/300:19:553
3794152994036,3cyclictest3834479-21kworker/u8:2+flush-179:021:19:561
3794152994034,5cyclictest3811571-21kworker/u8:0+events_unbound20:15:141
3794157993935,3cyclictest0-21swapper/321:27:003
3794157993933,5cyclictest3850641-21turbostat22:05:003
379415799390,37cyclictest0-21swapper/320:25:593
3794155993935,2cyclictest0-21swapper/219:26:592
3794155993934,3cyclictest0-21swapper/219:46:002
379415599390,36cyclictest0-21swapper/220:25:592
3794152993931,6cyclictest3881189-21kworker/u8:3+events_unbound00:15:131
3794152993931,6cyclictest3823301-21kworker/u8:3+events_unbound20:40:191
379415299391,2cyclictest714-21Xorg22:56:581
379415299390,3cyclictest3820074-21turbostat20:34:561
3794150993936,2cyclictest0-21swapper/023:03:590
3794150993934,4cyclictest3857252-21kworker/u8:1+events_unbound22:35:140
379415799380,1cyclictest0-21swapper/320:31:593
3794155993834,2cyclictest0-21swapper/220:58:002
379415599380,36cyclictest0-21swapper/220:18:592
379415599380,35cyclictest0-21swapper/222:39:592
3794152993835,2cyclictest0-21swapper/122:54:591
3794152993835,2cyclictest0-21swapper/122:11:581
3794152993835,2cyclictest0-21swapper/120:15:001
3794152993832,4cyclictest0-21swapper/123:18:591
3794150993833,4cyclictest3808375-21kworker/u8:1+events_unbound19:55:200
379415099381,34cyclictest3800697-21sshd19:30:130
3794157993735,1cyclictest0-21swapper/323:25:593
3794157993734,2cyclictest0-21swapper/319:12:593
3794157993731,5cyclictest3869740-21turbostat23:05:003
379415799370,36cyclictest0-21swapper/320:18:593
379415799370,1cyclictest0-21swapper/321:46:583
3794155993734,2cyclictest0-21swapper/222:45:592
3794155993734,2cyclictest0-21swapper/221:36:592
3794155993734,2cyclictest0-21swapper/219:12:592
3794155993734,2cyclictest0-21swapper/200:30:582
3794155993733,2cyclictest0-21swapper/223:06:592
3794155993733,2cyclictest0-21swapper/222:24:552
3794155993732,2cyclictest0-21swapper/200:24:552
3794152993732,4cyclictest3881189-21kworker/u8:3+events_unbound23:45:211
3794152993732,4cyclictest3855359-21kworker/u8:0+events_unbound22:25:211
3794150993732,4cyclictest3824873-21systemd-run20:45:000
3794150993731,5cyclictest3811712-21mailstats20:00:230
3794150993730,6cyclictest3862667-21missed_timers22:40:170
379415099370,36cyclictest0-21swapper/021:28:000
3794157993634,1cyclictest0-21swapper/322:28:593
3794155993633,2cyclictest0-21swapper/222:12:582
379415599360,1cyclictest0-21swapper/221:46:592
379415599360,1cyclictest0-21swapper/219:45:002
4577091350,7ptp4l441ktimers/320:45:003
3794157993533,1cyclictest0-21swapper/322:45:593
3794157993533,1cyclictest0-21swapper/320:57:593
3794157993533,1cyclictest0-21swapper/319:26:593
3794157993532,2cyclictest0-21swapper/323:06:593
3794157993532,2cyclictest0-21swapper/322:12:593
3794157993532,2cyclictest0-21swapper/319:46:003
3794155993533,1cyclictest0-21swapper/222:05:012
3794155993532,2cyclictest0-21swapper/223:05:012
3794155993531,2cyclictest0-21swapper/200:00:592
3794150993530,4cyclictest3842459-21kworker/u8:1+flush-179:022:05:210
3794150993530,4cyclictest3842459-21kworker/u8:1+flush-179:022:05:200
3794157993432,1cyclictest0-21swapper/321:36:593
3794157993432,1cyclictest0-21swapper/300:30:593
3794157993431,2cyclictest0-21swapper/322:24:553
3794157993430,2cyclictest0-21swapper/300:00:593
3794157993331,1cyclictest0-21swapper/300:24:553
3794155993330,2cyclictest0-21swapper/223:31:592
3794155993228,2cyclictest0-21swapper/200:38:592
379415799310,28cyclictest0-21swapper/322:15:133
379415599310,2cyclictest0-21swapper/219:40:022
379415599310,29cyclictest0-21swapper/200:25:122
3794152993128,2cyclictest714-21Xorg23:26:591
3794152993126,4cyclictest3855359-21kworker/u8:0+events_unbound22:30:181
3794152993126,4cyclictest3855359-21kworker/u8:0+events_unbound22:30:171
3794157993028,1cyclictest0-21swapper/323:31:593
3794157993027,2cyclictest0-21swapper/322:35:123
3794157993027,2cyclictest0-21swapper/300:38:593
3794157993023,5cyclictest3874773-21turbostat23:20:013
379415799300,29cyclictest0-21swapper/323:20:133
3794155993027,2cyclictest0-21swapper/219:22:582
379415599300,28cyclictest0-21swapper/222:15:142
379415599300,28cyclictest0-21swapper/200:00:022
379415599300,27cyclictest0-21swapper/223:20:132
379415599300,1cyclictest0-21swapper/220:31:582
3794157992926,2cyclictest0-21swapper/319:40:133
379415799290,28cyclictest0-21swapper/322:50:113
379415799290,28cyclictest0-21swapper/322:05:123
379415799290,28cyclictest0-21swapper/322:05:123
3794155992926,2cyclictest0-21swapper/222:29:592
3794155992926,2cyclictest0-21swapper/222:05:122
3794155992926,2cyclictest0-21swapper/222:05:122
3794155992925,2cyclictest0-21swapper/220:08:592
379415599290,27cyclictest0-21swapper/222:50:112
379415599290,27cyclictest0-21swapper/220:01:592
4577091280,6ptp4l441ktimers/320:40:013
4577091280,5ptp4l441ktimers/323:54:553
3794157992826,1cyclictest0-21swapper/319:22:593
3794157992826,1cyclictest0-21swapper/319:15:113
3794157992825,2cyclictest0-21swapper/300:10:123
379415799280,27cyclictest0-21swapper/320:01:593
379415799280,27cyclictest0-21swapper/300:00:023
379415799280,26cyclictest0-21swapper/300:25:113
379415799280,1cyclictest0-21swapper/319:40:023
3794155992825,2cyclictest0-21swapper/221:11:002
3794155992825,2cyclictest0-21swapper/219:58:592
3794155992825,2cyclictest0-21swapper/219:50:122
3794155992825,2cyclictest0-21swapper/200:10:122
379415599280,27cyclictest0-21swapper/223:28:592
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:35:013
4577091270,6ptp4l441ktimers/321:15:003
4577091270,6ptp4l441ktimers/320:24:553
4577091270,6ptp4l441ktimers/300:09:563
4577091270,5ptp4l441ktimers/321:05:013
3794157992724,2cyclictest0-21swapper/320:08:583
3794157992724,2cyclictest0-21swapper/319:59:003
379415799270,26cyclictest0-21swapper/321:59:593
379415799270,25cyclictest0-21swapper/321:40:123
379415799270,25cyclictest0-21swapper/321:05:143
379415799270,19cyclictest0-21swapper/323:15:003
379415799270,19cyclictest0-21swapper/323:14:593
3794155992724,2cyclictest0-21swapper/221:09:542
3794155992723,2cyclictest0-21swapper/220:39:552
379415599270,25cyclictest0-21swapper/221:59:582
379415599270,19cyclictest0-21swapper/223:15:032
4577091260,7ptp4l441ktimers/323:45:003
4577091260,7ptp4l441ktimers/323:45:003
4577091260,6ptp4l61490irq/134-eno1-TxRx-023:40:013
4577091260,6ptp4l61490irq/134-eno1-TxRx-021:25:013
4577091260,6ptp4l441ktimers/320:49:563
4577091260,6ptp4l441ktimers/319:54:543
4577091260,5ptp4l441ktimers/323:49:553
4577091260,5ptp4l441ktimers/322:34:553
4577091260,5ptp4l441ktimers/322:34:553
379415799260,1cyclictest0-21swapper/320:51:593
3794155992623,2cyclictest0-21swapper/222:57:592
3794155992623,2cyclictest0-21swapper/220:47:582
379415599260,2cyclictest0-21swapper/221:40:112
379415599260,2cyclictest0-21swapper/220:51:592
379415599260,24cyclictest0-21swapper/221:24:592
379415599260,24cyclictest0-21swapper/221:02:582
3794150992621,3cyclictest3794230-21latency_hist19:10:020
4577091250,6ptp4l441ktimers/322:45:003
3794157992523,1cyclictest0-21swapper/322:58:003
3794155992522,2cyclictest0-21swapper/223:45:002
3794155992522,2cyclictest0-21swapper/223:44:592
3794155992522,2cyclictest0-21swapper/222:34:002
3794155992522,2cyclictest0-21swapper/222:33:592
4577091240,5ptp4l61490irq/134-eno1-TxRx-021:54:553
4577091240,5ptp4l441ktimers/321:19:553
3794155992422,1cyclictest0-21swapper/223:55:002
3794155992421,2cyclictest0-21swapper/223:46:592
3794155992421,2cyclictest0-21swapper/223:39:552
379415599240,1cyclictest0-21swapper/223:15:002
379415599240,1cyclictest0-21swapper/223:14:592
3794152992420,3cyclictest0-21swapper/119:10:021
4577091230,4ptp4l61490irq/134-eno1-TxRx-020:14:553
379415799230,22cyclictest3840815-21turbostat21:35:003
3794155992218,2cyclictest0-21swapper/220:11:592
3794155992218,2cyclictest0-21swapper/200:07:592
3794155992118,2cyclictest0-21swapper/220:43:002
3794155991814,2cyclictest0-21swapper/221:30:592
3794155991512,2cyclictest0-21swapper/221:50:022
3794155991512,2cyclictest0-21swapper/219:16:002
3794155991310,2cyclictest0-21swapper/222:42:582
37941559996,2cyclictest0-21swapper/221:18:582
37941559996,2cyclictest0-21swapper/219:30:132
37941559930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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