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2026-03-15 - 05:59
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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 Sun Mar 15, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35547419910989,17cyclictest3578775-21latency_hist20:25:010
35547429910691,11cyclictest3617762-21latency_hist22:25:011
3554742999692,3cyclictest3635574-21kworker/u8:0+events_unbound00:04:011
3554742999581,11cyclictest3611134-21latency_hist22:05:011
3554742999085,4cyclictest3627595-21kworker/u8:1+events_unbound23:15:291
3554742998681,4cyclictest3656386-21kworker/u8:2+events_unbound00:35:221
3554742998681,4cyclictest3591816-21kworker/u8:0+events_unbound21:35:231
3554741998174,5cyclictest3590421-21/usr/sbin/munin21:00:240
3554742998071,7cyclictest266-21systemd-journal23:15:001
3554741998068,9cyclictest3557823-21apt-get19:20:010
3554741997968,8cyclictest266-21systemd-journal23:55:000
3554742997874,3cyclictest3656332-21kworker/u8:1+events_unbound00:25:211
3554742997770,5cyclictest3633917-21kworker/u8:2+flush-179:023:25:561
3554741997667,7cyclictest3648309-40logrotate00:00:020
3554742997566,6cyclictest3621196-21latency_hist22:35:011
3554742997463,9cyclictest266-21systemd-journal23:25:001
355474199721,69cyclictest211irq_work/000:14:000
3554742997166,4cyclictest3635574-21kworker/u8:0+flush-179:023:54:561
3554742996959,7cyclictest3564453-21latency_hist19:40:011
3554742996763,3cyclictest3567588-21kworker/u8:3+events_unbound19:46:211
3554741996761,4cyclictest3590153-21kworker/u8:2+flush-179:021:10:240
3554742996558,5cyclictest3578819-21kworker/u8:3+events_unbound20:25:141
3554741996550,13cyclictest266-21systemd-journal22:30:000
3554741996455,7cyclictest3566039-21latency_hist19:45:010
3554742996258,3cyclictest3638744-21kworker/u8:3+events_unbound23:30:221
3554742996254,6cyclictest3578819-21kworker/u8:3+flush-179:020:35:151
3554741996154,5cyclictest3643583-21systemd-run23:45:000
3554742996056,3cyclictest3591816-21kworker/u8:0+events_unbound21:25:261
3554742996055,4cyclictest3635574-21kworker/u8:0+events_unbound00:11:191
3554742996051,3cyclictest3591816-21kworker/u8:0+events_unbound21:57:201
3554742996044,14cyclictest3569243-21kworker/u8:1+flush-179:020:10:001
3554742995955,3cyclictest3645166-21kworker/u8:3+events_unbound00:07:541
3554742995950,7cyclictest3624388-21latency_hist22:45:021
3554742995854,3cyclictest3633917-21kworker/u8:2+events_unbound23:37:491
3554742995854,3cyclictest3578819-21kworker/u8:3+events_unbound21:05:171
3554742995854,3cyclictest3578819-21kworker/u8:3+events_unbound20:57:291
3554742995854,3cyclictest3556193-21kworker/u8:1+events_unbound19:17:171
3554742995853,4cyclictest3558318-21kworker/u8:0+events_unbound19:54:191
3554742995853,4cyclictest3558318-21kworker/u8:0+events_unbound19:43:191
3554742995849,7cyclictest3619608-21latency_hist22:30:001
3554741995852,4cyclictest3629424-21apt-get23:00:120
3554741995852,4cyclictest3591816-21kworker/u8:0+flush-179:021:44:560
3554741995848,8cyclictest3638710-21apt-get23:25:560
3554741995847,8cyclictest266-21systemd-journal20:10:010
3554741995846,9cyclictest3557823-21apt-get19:20:000
3554742995752,4cyclictest3614547-21kworker/u8:2+events_unbound22:15:241
3554742995752,4cyclictest3558318-21kworker/u8:0+events_unbound20:10:241
3554742995651,4cyclictest3591816-21kworker/u8:0+events_unbound21:50:171
3554742995550,4cyclictest3591816-21kworker/u8:0+events_unbound21:46:201
3554742995549,5cyclictest3635574-21kworker/u8:0+flush-179:023:45:261
3554742995449,4cyclictest3569243-21kworker/u8:1+events_unbound20:18:201
3554742995447,5cyclictest266-21systemd-journal19:25:001
3554742995443,9cyclictest3648385-40gzip00:00:011
3554741995446,6cyclictest3659790-21latency_hist00:35:020
3554741995444,7cyclictest3590153-21kworker/u8:2+flush-179:021:55:250
3554741995345,5cyclictest3633917-21kworker/u8:2+flush-179:023:20:000
3554741995344,6cyclictest3649982-21latency_hist00:05:000
3554745995248,2cyclictest0-21swapper/200:13:592
3554742995247,4cyclictest3558318-21kworker/u8:0+events_unbound20:30:181
3554742995245,4cyclictest3629149-21latency_hist23:00:011
3554741995248,2cyclictest3645166-21kworker/u8:3+events_unbound00:35:020
3554741995245,5cyclictest3621185-21kworker/u8:3+flush-179:022:55:190
3554741995243,7cyclictest3570800-21latency_hist20:00:000
3554749995149,1cyclictest0-21swapper/321:57:583
3554742995146,4cyclictest3590153-21kworker/u8:2+events_unbound21:11:201
3554741995145,3cyclictest3591816-21kworker/u8:0+events_unbound21:40:010
3554741995144,4cyclictest3614600-21kworker/u8:3+flush-179:022:20:200
3554741995128,19cyclictest3572407-21latency_hist20:05:010
3554742995046,3cyclictest3614547-21kworker/u8:2+events_unbound22:35:061
3554742995043,5cyclictest266-21systemd-journal21:43:191
3554742995042,5cyclictest3601314-21latency_hist21:35:001
3554741995044,4cyclictest3633929-21latency_hist23:15:000
3554742994945,3cyclictest3578819-21kworker/u8:3+events_unbound20:40:031
3554742994944,4cyclictest266-21systemd-journal22:49:191
3554741994938,8cyclictest266-21systemd-journal20:49:190
4577091480,13ptp4l441ktimers/319:09:553
3554742994844,3cyclictest3640386-21kworker/u8:1+events_unbound23:40:021
3554742994844,3cyclictest3614547-21kworker/u8:2+events_unbound22:52:201
3554741994844,3cyclictest3564498-21kworker/u8:2+events_unbound19:50:230
3554741994820,21cyclictest3562340-21phc2sys19:30:230
355474199480,2cyclictest0-21swapper/023:20:130
3554742994743,3cyclictest3635574-21kworker/u8:0+events_unbound00:20:031
3554741994739,6cyclictest3641960-21latency_hist23:40:010
3554741994738,7cyclictest3599726-21latency_hist21:30:010
3554742994642,3cyclictest3596590-21systemd-run21:19:591
3554741994639,5cyclictest3614547-21kworker/u8:2+flush-179:022:15:190
3554741994636,8cyclictest3622784-21latency_hist22:40:010
3554742994541,3cyclictest3656386-21kworker/u8:2+events_unbound00:30:061
3554745994441,2cyclictest0-21swapper/219:18:002
3554742994439,4cyclictest3627595-21kworker/u8:1+events_unbound23:00:011
3554741994432,9cyclictest266-21systemd-journal21:20:180
3554741994428,13cyclictest0-21swapper/022:10:000
3554741994418,20cyclictest3650237-21apt-get00:05:110
355474199441,5cyclictest266-21systemd-journal20:15:000
3554745994340,2cyclictest0-21swapper/223:37:582
3554745994340,2cyclictest0-21swapper/219:15:002
3554742994339,3cyclictest3558318-21kworker/u8:0+events_unbound19:26:191
3554742994337,4cyclictest3654743-21latency_hist00:20:011
355474299430,3cyclictest3561270-21turbostat19:34:551
3554741994337,4cyclictest3621185-21kworker/u8:3+flush-179:022:40:210
3554741994337,4cyclictest3591816-21kworker/u8:0+flush-179:021:50:210
3554741994327,13cyclictest0-21swapper/021:35:010
3554741994323,17cyclictest0-21swapper/020:55:260
3554741994323,17cyclictest0-21swapper/019:35:230
3554741994315,23cyclictest3580363-21latency_hist20:30:010
355474199430,40cyclictest3592028-21apt-get21:05:120
3554745994239,2cyclictest0-21swapper/222:03:582
3554742994238,3cyclictest3590153-21kworker/u8:2+events_unbound21:00:261
3554742994133,3cyclictest3578819-21kworker/u8:3+events_unbound20:45:211
3554742994132,7cyclictest266-21systemd-journal21:25:001
3554741994136,3cyclictest211irq_work/020:50:590
3554741994135,4cyclictest3578819-21kworker/u8:3+flush-179:020:35:000
3554741994135,4cyclictest266-21systemd-journal19:14:560
3554741994132,6cyclictest3656332-21kworker/u8:1+flush-179:000:30:000
3554741994122,17cyclictest482-21avahi-daemon20:15:240
3554741994119,19cyclictest3595180-21/usr/sbin/munin21:15:210
355474199410,39cyclictest3625980-21munin-run22:50:000
355474999400,39cyclictest3614574-21turbostat22:15:013
3554741994033,5cyclictest3558318-21kworker/u8:0+flush-179:020:40:160
355474199401,37cyclictest714-21Xorg21:49:590
355474199400,38cyclictest714-21Xorg20:36:590
3554742993935,3cyclictest3569243-21kworker/u8:1+events_unbound19:59:511
355474299390,3cyclictest714-21Xorg20:05:001
3554741993922,16cyclictest0-21swapper/000:20:580
3554741993918,19cyclictest0-21swapper/000:20:010
3554749993833,4cyclictest3585415-21turbostat20:49:553
3554745993835,2cyclictest0-21swapper/222:00:012
355474599380,35cyclictest0-21swapper/200:17:592
3554742993834,3cyclictest3556193-21kworker/u8:1+events_unbound19:13:571
3554742993833,4cyclictest3630801-21kworker/u8:0+events_unbound23:09:251
3554741993827,6cyclictest0-21swapper/023:45:590
3554741993818,17cyclictest0-21swapper/022:30:210
355474199380,37cyclictest0-21swapper/023:31:590
3554745993734,2cyclictest0-21swapper/220:52:582
3554745993734,2cyclictest0-21swapper/220:42:002
355474599370,35cyclictest0-21swapper/220:15:592
355474599370,1cyclictest0-21swapper/222:42:582
3554742993729,3cyclictest3591816-21kworker/u8:0+events_unbound22:10:151
3554741993728,6cyclictest3560707-21kworker/u8:1+flush-179:019:45:160
355474199372,7cyclictest714-21Xorg23:09:580
3554749993632,3cyclictest3649990-21turbostat00:09:553
355474999360,35cyclictest0-21swapper/320:13:593
355474999360,1cyclictest0-21swapper/321:00:593
3554742993632,3cyclictest3578819-21kworker/u8:3+events_unbound20:51:001
3554742993632,3cyclictest3558318-21kworker/u8:0+events_unbound20:22:201
355474199364,9cyclictest714-21Xorg22:12:590
3554741993626,6cyclictest0-21swapper/019:26:590
355474999350,1cyclictest0-21swapper/321:47:593
355474599354,29cyclictest0-21swapper/221:47:582
3554745993531,2cyclictest0-21swapper/220:45:592
4577091340,3ptp4l441ktimers/322:05:023
3554749993432,1cyclictest0-21swapper/322:52:583
3554749993432,1cyclictest0-21swapper/320:55:003
3554745993432,1cyclictest0-21swapper/220:34:592
3554745993431,2cyclictest0-21swapper/200:08:582
355474199343,12cyclictest2304-21lightdm-gtk-gre22:52:580
3554749993331,1cyclictest0-21swapper/323:08:583
3554749993331,1cyclictest0-21swapper/321:41:583
3554745993330,2cyclictest0-21swapper/222:25:132
3554745993330,2cyclictest0-21swapper/219:53:592
3554741993330,2cyclictest0-21swapper/022:05:000
4577091320,6ptp4l441ktimers/319:50:003
3554749993230,1cyclictest0-21swapper/322:24:593
3554749993230,1cyclictest0-21swapper/319:58:583
3554749993229,2cyclictest0-21swapper/319:12:003
3554745993229,2cyclictest0-21swapper/221:39:562
3554745993229,2cyclictest0-21swapper/220:56:592
3554745993229,2cyclictest0-21swapper/219:25:592
3554745993228,2cyclictest0-21swapper/222:39:582
3554749993129,1cyclictest0-21swapper/322:47:003
3554749993129,1cyclictest0-21swapper/321:51:003
3554749993129,1cyclictest0-21swapper/321:30:593
3554749993129,1cyclictest0-21swapper/320:29:593
3554749993129,1cyclictest0-21swapper/319:50:593
3554749993125,5cyclictest3654763-21turbostat00:24:553
355474599314,1cyclictest0-21swapper/223:34:592
3554745993129,1cyclictest0-21swapper/221:05:122
3554745993128,2cyclictest0-21swapper/219:41:592
3554745993127,2cyclictest0-21swapper/222:53:592
355474299310,30cyclictest0-21swapper/122:05:021
3554749993029,1cyclictest0-21swapper/323:57:003
355474999300,28cyclictest0-21swapper/300:35:023
3554745993027,2cyclictest0-21swapper/223:57:592
3554745993027,2cyclictest0-21swapper/222:55:582
3554745993027,2cyclictest0-21swapper/221:26:582
3554745993027,2cyclictest0-21swapper/220:22:592
3554745993027,2cyclictest0-21swapper/219:47:592
3554745993027,2cyclictest0-21swapper/219:37:002
355474599300,2cyclictest0-21swapper/221:41:592
355474599300,28cyclictest0-21swapper/223:15:162
355474599300,28cyclictest0-21swapper/200:30:022
4577091290,7ptp4l441ktimers/320:55:013
3554749992927,1cyclictest0-21swapper/323:28:593
3554749992927,1cyclictest0-21swapper/323:00:133
3554749992926,2cyclictest0-21swapper/321:35:133
3554749992926,2cyclictest0-21swapper/320:15:133
355474999290,28cyclictest0-21swapper/323:30:133
355474999290,28cyclictest0-21swapper/322:35:133
355474999290,27cyclictest0-21swapper/322:05:013
3554745992927,1cyclictest0-21swapper/219:20:022
3554745992926,2cyclictest0-21swapper/223:05:142
3554745992926,2cyclictest0-21swapper/221:32:592
355474599290,27cyclictest0-21swapper/222:30:122
355474599290,27cyclictest0-21swapper/220:25:132
355474599290,1cyclictest0-21swapper/223:10:152
3554749992826,1cyclictest0-21swapper/323:16:003
3554749992826,1cyclictest0-21swapper/322:56:583
3554749992826,1cyclictest0-21swapper/322:32:593
3554749992825,2cyclictest0-21swapper/323:50:133
355474999280,2cyclictest0-21swapper/323:40:143
355474999280,2cyclictest0-21swapper/319:35:123
355474999280,27cyclictest0-21swapper/321:25:143
355474999280,27cyclictest0-21swapper/320:20:113
355474999280,27cyclictest0-21swapper/319:20:123
355474999280,26cyclictest0-21swapper/320:35:023
355474999280,26cyclictest0-21swapper/320:05:113
355474999280,26cyclictest0-21swapper/319:15:143
355474999280,1cyclictest0-21swapper/322:15:143
3554745992825,2cyclictest0-21swapper/223:45:142
3554745992825,2cyclictest0-21swapper/221:52:002
3554745992825,2cyclictest0-21swapper/221:18:592
355474599280,2cyclictest0-21swapper/223:25:132
355474599280,26cyclictest0-21swapper/222:05:032
355474599280,26cyclictest0-21swapper/220:35:592
355474599280,26cyclictest0-21swapper/220:05:592
355474599280,26cyclictest0-21swapper/220:00:122
355474599280,26cyclictest0-21swapper/200:27:592
4577091270,7ptp4l61490irq/134-eno1-TxRx-019:35:013
4577091270,7ptp4l441ktimers/321:09:563
4577091270,6ptp4l441ktimers/323:40:013
4577091270,6ptp4l441ktimers/321:20:003
4577091270,6ptp4l441ktimers/320:45:013
4577091270,5ptp4l441ktimers/322:45:023
3554749992725,1cyclictest0-21swapper/300:03:593
3554749992724,2cyclictest0-21swapper/321:10:133
355474599270,26cyclictest0-21swapper/221:20:102
3554742992723,3cyclictest3554789-21cat19:10:031
4577091260,6ptp4l61490irq/134-eno1-TxRx-023:50:003
4577091260,6ptp4l61490irq/134-eno1-TxRx-020:34:553
4577091260,6ptp4l61490irq/134-eno1-TxRx-020:05:003
4577091260,6ptp4l61490irq/134-eno1-TxRx-000:15:003
4577091260,6ptp4l441ktimers/323:24:563
4577091260,5ptp4l441ktimers/300:29:553
355474599260,24cyclictest0-21swapper/220:13:592
4577091250,5ptp4l441ktimers/319:29:553
3554749992523,1cyclictest0-21swapper/323:12:583
3554749992523,1cyclictest0-21swapper/322:27:593
3554749992523,1cyclictest0-21swapper/300:16:003
3554745992522,2cyclictest0-21swapper/221:11:002
3554745992522,2cyclictest0-21swapper/221:02:592
3554745992522,2cyclictest0-21swapper/219:55:132
4577091240,4ptp4l441ktimers/321:24:543
3554749992421,2cyclictest0-21swapper/300:30:023
3554745992422,1cyclictest0-21swapper/222:24:582
3554745992421,2cyclictest0-21swapper/223:23:582
3554745992421,2cyclictest0-21swapper/222:47:002
3554745992421,2cyclictest0-21swapper/222:17:592
231999240,14rtkit-daemon501-21systemd-logind19:06:560
4577091230,4ptp4l61490irq/134-eno1-TxRx-019:44:553
3554745992320,2cyclictest0-21swapper/219:30:582
3554745992118,2cyclictest0-21swapper/223:00:592
3554745991916,2cyclictest0-21swapper/200:37:592
3554745991613,2cyclictest0-21swapper/200:04:002
3554745991612,2cyclictest0-21swapper/223:42:002
355474599139,2cyclictest0-21swapper/223:55:002
3554745991310,2cyclictest0-21swapper/222:13:592
355474599129,2cyclictest0-21swapper/200:25:002
35547459985,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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