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2026-04-19 - 13:17
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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 Sun Apr 19, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
377617299121105,12cyclictest1082754-21cupsd00:00:000
37761769910696,8cyclictest1082758-21cups-browsed23:59:591
3776176999989,7cyclictest3842164-21latency_hist22:35:011
3776176999085,4cyclictest3827566-21kworker/u8:0+flush-179:022:04:561
3776176999082,6cyclictest3838730-21latency_hist22:25:011
3776176998980,7cyclictest510-21rs:main1
3776176998480,3cyclictest3789102-21kworker/u8:2+events_unbound20:09:561
3776176998379,3cyclictest3861567-21kworker/u8:4+events_unbound23:50:251
3776176998379,3cyclictest3774518-21kworker/u8:3+events_unbound19:25:241
3776176998278,3cyclictest3800251-21kworker/u8:2+events_unbound20:30:231
3776176998278,3cyclictest3779797-21kworker/u8:1+events_unbound19:31:561
3776172998274,6cyclictest3861567-21kworker/u8:4+flush-179:000:35:010
3776172998074,4cyclictest3784000-21kworker/u8:0+events_unbound20:05:010
3776172998074,4cyclictest3784000-21kworker/u8:0+events_unbound20:05:010
3776176997974,4cyclictest3827566-21kworker/u8:0+events_unbound21:50:241
3776176997872,5cyclictest3851965-21kworker/u8:0+events_unbound23:03:571
3776172997872,4cyclictest3858592-21kworker/u8:0+flush-179:023:34:560
3776172997772,3cyclictest3835568-21kworker/u8:1+events_unbound22:40:240
3776172997772,3cyclictest3835568-21kworker/u8:1+events_unbound22:40:230
3776172997770,5cyclictest3875400-21kworker/u8:1+flush-179:000:20:010
3776176997570,4cyclictest3803361-21kworker/u8:3+events_unbound20:35:281
3776172997568,4cyclictest3792287-21kworker/u8:1+flush-179:020:35:000
3776176997469,4cyclictest3789102-21kworker/u8:2+events_unbound20:14:561
3776172997467,4cyclictest3779797-21kworker/u8:1+events_unbound19:20:250
3776176997364,7cyclictest1213033-21systemd-journal21:35:001
3776176997364,6cyclictest3869554-21kworker/u8:0+flush-179:000:04:001
3776172997367,5cyclictest3849837-21kworker/u8:1+flush-179:023:09:560
3776176997167,3cyclictest3875400-21kworker/u8:1+events_unbound00:23:571
3776176997167,3cyclictest3858592-21kworker/u8:0+events_unbound23:33:571
3776176997167,3cyclictest3819084-21kworker/u8:2+events_unbound21:45:191
3776176997166,4cyclictest3784000-21kworker/u8:0+events_unbound19:57:561
3776172997157,4cyclictest3803369-21kworker/u8:4+flush-179:020:55:000
3776172997157,4cyclictest3803369-21kworker/u8:4+flush-179:020:55:000
3776179997039,1cyclictest0-21swapper/320:53:593
3776179997039,1cyclictest0-21swapper/320:53:593
3776176997066,3cyclictest3786673-21kworker/u8:4+events_unbound19:41:561
3776176997065,4cyclictest3855195-21kworker/u8:3+events_unbound23:17:561
3776172997064,5cyclictest3855195-21kworker/u8:3+flush-179:023:19:550
3776172997064,4cyclictest3816164-21kworker/u8:3+flush-179:021:29:550
3776172997063,5cyclictest3832599-21/usr/sbin/munin22:05:240
3776172997059,9cyclictest1213033-21systemd-journal20:25:000
3776176996965,3cyclictest3861567-21kworker/u8:4+events_unbound23:45:231
3776176996964,4cyclictest3819084-21kworker/u8:2+events_unbound21:22:541
3776172996961,6cyclictest3861534-21kworker/u8:3+events_unbound23:40:240
3776172996957,9cyclictest3879119-21latency_hist00:30:010
3776176996863,4cyclictest3875400-21kworker/u8:1+events_unbound00:26:571
3776176996863,4cyclictest3869554-21kworker/u8:0+events_unbound00:11:571
3776176996763,3cyclictest3776071-21kworker/u8:0+events_unbound19:15:261
3776176996760,5cyclictest3785609-21latency_hist19:40:021
3776172996762,4cyclictest3784000-21kworker/u8:0+flush-179:020:29:560
3776172996761,5cyclictest3812131-21kworker/u8:1+flush-179:021:19:550
3776172996761,5cyclictest3812131-21kworker/u8:1+flush-179:021:19:550
3776176996662,3cyclictest3849837-21kworker/u8:1+events_unbound23:25:191
3776176996662,3cyclictest3774518-21kworker/u8:3+events_unbound19:10:261
3776176996661,4cyclictest3847461-21kworker/u8:2+events_unbound22:52:561
3776176996661,4cyclictest3835568-21kworker/u8:1+events_unbound22:27:561
3776172996660,4cyclictest3869554-21kworker/u8:0+flush-179:000:10:220
3776172996660,4cyclictest3789102-21kworker/u8:2+flush-179:020:00:010
3776172996658,6cyclictest3795431-21latency_hist20:10:000
377617799650,63cyclictest0-21swapper/222:52:002
3776176996561,3cyclictest3816164-21kworker/u8:3+events_unbound21:18:561
3776176996561,3cyclictest3816164-21kworker/u8:3+events_unbound21:18:561
3776176996560,4cyclictest3840311-21kworker/u8:0+events_unbound22:36:551
3776176996560,4cyclictest3816164-21kworker/u8:3+events_unbound21:27:571
3776172996562,2cyclictest0-21swapper/023:48:590
3776172996562,2cyclictest0-21swapper/022:21:590
3776172996559,4cyclictest3813980-21kworker/u8:2+flush-179:021:09:550
3776176996460,3cyclictest3803369-21kworker/u8:4+events_unbound20:58:581
3776176996459,4cyclictest3861567-21kworker/u8:4+events_unbound00:32:541
3776176996459,4cyclictest3779797-21kworker/u8:1+events_unbound19:22:351
3776172996458,4cyclictest3861567-21kworker/u8:4+flush-179:023:54:560
3776172996454,8cyclictest1213033-21systemd-journal20:15:010
3776176996358,4cyclictest3849837-21kworker/u8:1+events_unbound23:22:551
3776176996357,4cyclictest3847204-21latency_hist22:50:021
3776176996357,4cyclictest3847204-21latency_hist22:50:011
3776172996351,9cyclictest1213033-21systemd-journal00:00:010
3776176996258,3cyclictest3847461-21kworker/u8:2+events_unbound22:58:181
3776176996253,3cyclictest3816164-21kworker/u8:3+events_unbound21:35:201
3776176996252,4cyclictest3854565-21kworker/u8:2+events_unbound23:10:261
3776176996250,10cyclictest1213033-21systemd-journal22:17:561
3776176996156,4cyclictest3869554-21kworker/u8:0+events_unbound00:05:141
3776177996056,2cyclictest0-21swapper/220:18:002
3776176996056,3cyclictest3804957-21kworker/u8:0+events_unbound21:00:561
3776176996050,8cyclictest3806830-21apt-get20:45:111
3776176995955,3cyclictest3872784-21kworker/u8:2+events_unbound00:18:361
3776176995955,3cyclictest3827566-21kworker/u8:0+events_unbound21:58:561
3776176995954,4cyclictest3784000-21kworker/u8:0+events_unbound20:18:561
3776176995946,9cyclictest510-21rs:main1
3776176995854,3cyclictest3792287-21kworker/u8:1+events_unbound20:22:571
3776172995752,4cyclictest3812131-21kworker/u8:1+flush-179:021:05:010
3776172995751,4cyclictest3858592-21kworker/u8:0+flush-179:023:28:250
3776177995651,2cyclictest0-21swapper/219:54:592
3776176995651,4cyclictest3859909-21kworker/u8:2+events_unbound23:35:261
3776176995651,4cyclictest3792287-21kworker/u8:1+events_unbound20:01:561
3776176995651,4cyclictest3792287-21kworker/u8:1+events_unbound20:01:561
3776172995650,4cyclictest3804957-21kworker/u8:0+events_unbound20:40:220
3776176995545,7cyclictest510-21rs:main1
3776172995548,5cyclictest3839271-21diskstats22:25:150
3776172995543,9cyclictest3787227-21apt-get19:45:000
3776172995448,4cyclictest3792287-21kworker/u8:1+flush-179:020:15:150
3776176995348,4cyclictest3819084-21kworker/u8:2+events_unbound21:43:561
3776176995346,5cyclictest3776033-21latency_hist19:10:011
3776176995248,3cyclictest3827566-21kworker/u8:0+events_unbound22:07:561
3776172995146,4cyclictest3774518-21kworker/u8:3+flush-179:019:25:200
3776172995146,3cyclictest3804957-21kworker/u8:0+flush-179:020:45:220
3776179994947,1cyclictest0-21swapper/322:51:593
3776176994944,4cyclictest3786673-21kworker/u8:4+events_unbound19:50:031
3776176994934,12cyclictest3845359-21latency_hist22:45:011
3776176994934,12cyclictest3845359-21latency_hist22:45:011
3776176994844,3cyclictest3812131-21kworker/u8:1+events_unbound21:05:561
3776172994846,1cyclictest0-21swapper/022:55:590
3776172994843,4cyclictest3847461-21kworker/u8:2+flush-179:023:00:230
3776172994843,3cyclictest3819084-21kworker/u8:2+flush-179:021:45:220
3776172994841,5cyclictest3774518-21kworker/u8:3+flush-179:019:15:160
3776172994838,8cyclictest3803638-21apt-get20:35:130
4577091470,13ptp4l441ktimers/319:09:573
3776176994743,3cyclictest3861567-21kworker/u8:4+events_unbound23:41:561
3776172994742,4cyclictest3835568-21kworker/u8:1+events_unbound22:15:260
3776172994740,5cyclictest3876200-21apt-get00:20:100
3776172994740,5cyclictest3816164-21kworker/u8:3+events_unbound21:45:010
3776176994642,3cyclictest3792287-21kworker/u8:1+events_unbound20:27:561
3776172994637,7cyclictest3814767-21/usr/sbin/munin21:10:230
3776176994540,4cyclictest3804957-21kworker/u8:0+events_unbound20:50:211
3776176994540,4cyclictest3804957-21kworker/u8:0+events_unbound20:50:211
3776172994539,4cyclictest3854565-21kworker/u8:2+flush-179:023:10:230
3776172994539,4cyclictest3816164-21kworker/u8:3+events_unbound21:35:240
3776172994438,5cyclictest3835568-21kworker/u8:1+events_unbound22:45:020
3776172994438,5cyclictest3835568-21kworker/u8:1+events_unbound22:45:020
3776176994339,3cyclictest3804957-21kworker/u8:0+events_unbound20:43:571
3776172994340,1cyclictest3777649-21latency_hist19:15:010
3776172994232,8cyclictest3882594-21awk00:40:000
3776179994139,1cyclictest0-21swapper/319:58:593
3776176994137,3cyclictest3827566-21kworker/u8:0+events_unbound22:13:081
3776172994137,3cyclictest3835568-21kworker/u8:1+flush-179:022:30:260
3776172994137,3cyclictest3827566-21kworker/u8:0+events_unbound22:00:240
3776172994131,7cyclictest3816092-21kworker/u8:0+events_unbound21:20:150
377617999400,38cyclictest3824405-21turbostat21:40:003
377617999400,38cyclictest3816125-21turbostat21:15:003
3776176994035,4cyclictest3851965-21kworker/u8:0+flush-179:023:06:211
3776172994035,4cyclictest3827566-21kworker/u8:0+events_unbound22:10:230
3776172994032,6cyclictest3835568-21kworker/u8:1+flush-179:022:40:000
3776179993937,1cyclictest0-21swapper/300:20:003
3776179993936,2cyclictest0-21swapper/322:44:593
3776179993936,2cyclictest0-21swapper/322:44:593
3776177993936,2cyclictest0-21swapper/221:03:592
3776179993836,1cyclictest0-21swapper/320:17:593
377617999380,3cyclictest3797016-21turbostat20:15:013
377617999380,36cyclictest0-21swapper/323:15:593
3776177993835,2cyclictest0-21swapper/219:46:592
3776177993835,2cyclictest0-21swapper/200:18:002
3776172993835,2cyclictest0-21swapper/022:50:590
3776172993833,4cyclictest3816164-21kworker/u8:3+flush-179:021:30:560
3776172993833,4cyclictest3784000-21kworker/u8:0+flush-179:019:50:210
3776172993833,4cyclictest3784000-21kworker/u8:0+events_unbound19:50:000
3776172993833,3cyclictest3830772-21cron22:00:000
3776172993826,10cyclictest1213033-21systemd-journal00:09:590
377617299380,37cyclictest0-21swapper/020:59:590
3776179993734,2cyclictest0-21swapper/322:12:593
3776179993734,1cyclictest0-21swapper/319:36:003
3776177993734,2cyclictest0-21swapper/223:47:002
3776177993734,2cyclictest0-21swapper/222:34:582
3776177993734,2cyclictest0-21swapper/219:42:592
3776177993733,2cyclictest0-21swapper/200:00:002
377617799370,35cyclictest0-21swapper/221:24:552
3776172993731,5cyclictest3859909-21kworker/u8:2+flush-179:023:35:210
3776179993634,1cyclictest0-21swapper/323:54:593
3776179993634,1cyclictest0-21swapper/323:42:593
3776179993634,1cyclictest0-21swapper/323:22:003
3776179993634,1cyclictest0-21swapper/322:59:593
3776179993634,1cyclictest0-21swapper/322:46:593
3776179993634,1cyclictest0-21swapper/322:46:593
3776179993634,1cyclictest0-21swapper/300:24:583
3776179993634,1cyclictest0-21swapper/300:13:593
3776179993633,2cyclictest0-21swapper/322:16:593
3776179993633,2cyclictest0-21swapper/319:11:593
377617999360,35cyclictest0-21swapper/323:08:593
377617999360,35cyclictest0-21swapper/321:47:593
377617999360,35cyclictest0-21swapper/321:19:553
377617999360,35cyclictest0-21swapper/321:19:553
3776177993633,2cyclictest0-21swapper/223:13:592
3776172993633,2cyclictest3785665-21systemd-run19:40:010
3776172993632,2cyclictest3829182-21awk21:55:000
3776172993630,4cyclictest3849837-21kworker/u8:1+flush-179:023:25:010
3776179993533,1cyclictest0-21swapper/322:33:593
3776179993533,1cyclictest0-21swapper/322:01:593
3776179993533,1cyclictest0-21swapper/320:38:593
3776179993533,1cyclictest0-21swapper/320:31:003
3776179993533,1cyclictest0-21swapper/319:31:583
3776179993532,2cyclictest0-21swapper/319:54:593
377617999350,34cyclictest0-21swapper/322:27:593
377617999350,1cyclictest0-21swapper/320:28:583
3776179993432,1cyclictest0-21swapper/320:55:593
3776179993431,2cyclictest0-21swapper/323:47:593
3776177993431,2cyclictest0-21swapper/223:03:592
3776177993431,2cyclictest0-21swapper/221:36:002
3776177993431,2cyclictest0-21swapper/220:58:582
3776179993331,1cyclictest0-21swapper/322:24:003
3776179993331,1cyclictest0-21swapper/321:31:003
3776177993330,2cyclictest0-21swapper/219:34:562
377617799330,30cyclictest0-21swapper/219:38:592
3776172993327,4cyclictest3782691-21apt-get19:30:130
3776179993230,1cyclictest0-21swapper/321:43:593
3776179993230,1cyclictest0-21swapper/319:45:583
3776179993230,1cyclictest0-21swapper/319:24:003
3776179993230,1cyclictest0-21swapper/300:02:593
3776179993129,1cyclictest0-21swapper/320:09:593
3776177993128,2cyclictest0-21swapper/222:39:592
3776177993027,2cyclictest0-21swapper/223:18:592
3776177993027,2cyclictest0-21swapper/220:30:582
3776177993027,2cyclictest0-21swapper/219:20:132
377617799300,28cyclictest0-21swapper/222:45:132
377617799300,28cyclictest0-21swapper/222:45:132
377617799300,28cyclictest0-21swapper/200:10:122
4577091290,6ptp4l441ktimers/323:30:003
3776179992923,4cyclictest3863129-21turbostat23:40:003
377617999290,28cyclictest3819636-21turbostat21:25:003
377617999290,28cyclictest0-21swapper/321:00:113
3776177992926,2cyclictest0-21swapper/223:50:132
3776177992926,2cyclictest0-21swapper/221:50:132
3776177992926,2cyclictest0-21swapper/220:25:122
377617799290,2cyclictest0-21swapper/221:15:022
377617799290,2cyclictest0-21swapper/221:15:022
377617799290,2cyclictest0-21swapper/200:00:142
377617799290,27cyclictest0-21swapper/223:20:142
377617799290,27cyclictest0-21swapper/222:45:022
377617799290,27cyclictest0-21swapper/222:45:022
377617799290,27cyclictest0-21swapper/222:30:012
377617799290,27cyclictest0-21swapper/220:00:152
377617799290,27cyclictest0-21swapper/220:00:152
377617799290,21cyclictest0-21swapper/222:20:132
377617799290,1cyclictest0-21swapper/200:30:012
3776179992825,2cyclictest0-21swapper/320:00:143
3776179992825,2cyclictest0-21swapper/320:00:143
3776179992825,2cyclictest0-21swapper/300:30:023
3776179992825,2cyclictest0-21swapper/300:05:123
377617999280,2cyclictest0-21swapper/321:05:143
377617999280,27cyclictest0-21swapper/320:50:003
377617999280,26cyclictest0-21swapper/322:35:143
377617999280,26cyclictest0-21swapper/300:35:123
377617999280,21cyclictest0-21swapper/300:30:013
3776177992825,2cyclictest0-21swapper/222:14:592
377617799280,26cyclictest0-21swapper/222:00:132
377617799280,26cyclictest0-21swapper/220:10:122
377617799280,26cyclictest0-21swapper/200:25:142
4577091270,6ptp4l61490irq/134-eno1-TxRx-023:04:563
4577091270,6ptp4l441ktimers/321:55:013
4577091270,6ptp4l441ktimers/321:30:003
4577091270,5ptp4l61490irq/134-eno1-TxRx-022:00:003
3776179992724,2cyclictest3833952-21turbostat22:09:593
3776177992725,1cyclictest0-21swapper/221:10:002
3776177992724,2cyclictest0-21swapper/223:40:132
3776177992724,2cyclictest0-21swapper/222:58:582
3776177992724,2cyclictest0-21swapper/222:05:592
3776177992724,2cyclictest0-21swapper/221:45:132
3776177992724,2cyclictest0-21swapper/220:43:582
3776177992724,2cyclictest0-21swapper/220:08:592
377617799270,25cyclictest0-21swapper/223:25:592
4577091260,6ptp4l61490irq/134-eno1-TxRx-019:44:573
4577091260,6ptp4l441ktimers/300:00:003
4577091260,5ptp4l441ktimers/323:35:013
4577091260,5ptp4l441ktimers/319:30:003
4577091260,4ptp4l441ktimers/319:20:013
3776177992623,2cyclictest0-21swapper/220:53:002
3776177992623,2cyclictest0-21swapper/220:52:592
377617799260,2cyclictest0-21swapper/220:20:112
377617799260,1cyclictest0-21swapper/223:31:582
4577091250,5ptp4l441ktimers/320:44:553
4577091250,4ptp4l441ktimers/320:24:553
3776177992523,1cyclictest0-21swapper/200:24:592
3776177992522,2cyclictest0-21swapper/223:06:002
3776177992522,2cyclictest0-21swapper/220:00:002
3776177992522,2cyclictest0-21swapper/219:16:582
3776177992422,1cyclictest0-21swapper/221:14:592
3776177992320,2cyclictest0-21swapper/221:56:592
3776177992320,2cyclictest0-21swapper/221:26:592
3776177992219,2cyclictest0-21swapper/221:33:592
3776177992219,2cyclictest0-21swapper/200:36:002
3776179992119,1cyclictest0-21swapper/323:13:583
3776177992117,2cyclictest0-21swapper/219:14:002
3776177992017,2cyclictest0-21swapper/223:36:592
3776172991914,3cyclictest0-21swapper/019:10:020
3776177991715,1cyclictest0-21swapper/222:19:592
3776177991713,2cyclictest0-21swapper/221:44:592
3776177991512,2cyclictest0-21swapper/220:38:002
3776177991310,2cyclictest0-21swapper/220:45:132
37761779974,2cyclictest0-21swapper/200:06:052
37761779970,6cyclictest0-21swapper/219:29:422
37761779930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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