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2026-05-10 - 15:15
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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 May 10, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32316059911599,12cyclictest3324868-40logrotate00:00:011
32316019910898,7cyclictest3274750-21latency_hist21:25:010
32316059910795,11cyclictest3311693-21kworker/u8:3+events_unbound23:25:251
3231605999989,8cyclictest3334476-21kworker/u8:1+flush-179:000:40:001
3231605999892,4cyclictest3324934-21kworker/u8:2+flush-179:000:03:591
3231605999683,5cyclictest3254009-21kworker/u8:1+events_unbound20:35:231
3231605999587,6cyclictest3309483-21kworker/u8:1+events_unbound23:10:241
3231605999486,7cyclictest3254009-21kworker/u8:1+events_unbound20:20:001
3231605999383,8cyclictest3249027-21apt-get20:05:041
3231605998980,7cyclictest3260384-21kworker/u8:2+events_unbound21:15:001
3231605998878,8cyclictest3231447-21kworker/u8:3+events_unbound19:50:001
3231605998778,6cyclictest3234642-21kworker/u8:0+events_unbound19:20:141
3231605998681,4cyclictest3262042-21kworker/u8:3+events_unbound20:45:241
3231605998680,4cyclictest3266795-21latency_hist21:00:011
3231605998580,4cyclictest3231447-21kworker/u8:3+events_unbound19:30:231
3231605998578,5cyclictest3297272-21kworker/u8:2+events_unbound23:00:011
3231601998576,7cyclictest3269968-21latency_hist21:10:020
3231605998478,4cyclictest3324934-21kworker/u8:2+events_unbound00:25:261
3231605998475,6cyclictest3311589-21kworker/u8:2+events_unbound23:20:021
3231605998376,5cyclictest3297272-21kworker/u8:2+events_unbound22:45:221
3231605998374,6cyclictest3297272-21kworker/u8:2+flush-179:023:00:201
3231605998373,7cyclictest3305315-21kworker/u8:0+events_unbound23:40:171
3231605998278,3cyclictest3260384-21kworker/u8:2+events_unbound20:40:251
3231605998275,5cyclictest3234642-21kworker/u8:0+flush-179:019:20:011
3231605997973,4cyclictest3292489-21kworker/u8:0+events_unbound22:20:141
3231605997973,4cyclictest3244279-21kworker/u8:0+flush-179:020:20:161
3231605997972,5cyclictest3274785-21kworker/u8:3+events_unbound21:40:171
3231605997968,9cyclictest3305315-21kworker/u8:0+flush-179:023:35:011
3231601997867,9cyclictest3260384-21kworker/u8:2+flush-179:020:55:000
3231605997773,3cyclictest3274719-21kworker/u8:2+flush-179:021:30:251
3231605997770,5cyclictest3274719-21kworker/u8:2+flush-179:021:25:191
3231605997768,7cyclictest3311589-21kworker/u8:2+events_unbound23:45:141
3231605997671,4cyclictest3321158-21kworker/u8:3+events_unbound00:10:231
3231605997669,4cyclictest3239437-21kworker/u8:4+events_unbound20:00:141
3231605997669,4cyclictest3239437-21kworker/u8:4+events_unbound20:00:131
3231605997567,7cyclictest3274785-21kworker/u8:3+events_unbound21:50:241
3231605997560,14cyclictest3260384-21kworker/u8:2+flush-179:020:50:261
3231605997469,4cyclictest3323946-21kworker/u8:0+flush-179:000:20:251
3231605997469,4cyclictest3289884-21kworker/u8:1+flush-179:022:10:251
3231605997469,4cyclictest3268914-21kworker/u8:1+flush-179:021:15:271
3231605997466,6cyclictest3292489-21kworker/u8:0+events_unbound22:30:001
3231605997466,5cyclictest3257214-21kworker/u8:0+flush-179:020:30:201
3231605997465,6cyclictest3309483-21kworker/u8:1+events_unbound23:15:181
3231601997465,7cyclictest3310260-21/usr/sbin/munin23:15:230
3231605997369,3cyclictest3274785-21kworker/u8:3+flush-179:021:35:241
3231605997263,6cyclictest3297272-21kworker/u8:2+events_unbound22:35:131
3231605997263,6cyclictest3231447-21kworker/u8:3+events_unbound19:50:191
3231601997263,6cyclictest3308437-21latency_hist23:10:010
3231605997066,3cyclictest3287469-21kworker/u8:3+events_unbound22:05:251
3231601997059,9cyclictest3252697-21apt-get20:15:120
3231605996965,3cyclictest3266827-21kworker/u8:0+flush-179:021:20:161
3231605996962,4cyclictest3334476-21kworker/u8:1+events_unbound00:30:141
3231605996962,4cyclictest3334476-21kworker/u8:1+events_unbound00:30:131
3231605996763,3cyclictest3305315-21kworker/u8:0+flush-179:023:35:261
3231605996661,4cyclictest3305315-21kworker/u8:0+flush-179:023:05:161
3231605996661,4cyclictest3247470-21kworker/u8:2+events_unbound20:25:221
3231605996555,7cyclictest3244279-21kworker/u8:0+events_unbound19:55:191
3231601996557,6cyclictest3305315-21kworker/u8:0+events_unbound23:00:150
3231605996459,4cyclictest3300529-21kworker/u8:3+events_unbound22:50:221
3231605996457,6cyclictest3268914-21kworker/u8:1+events_unbound21:05:261
3231601996449,11cyclictest1213033-21systemd-journal22:00:010
3231605996359,3cyclictest3274785-21kworker/u8:3+events_unbound21:55:141
3231610996260,1cyclictest0-21swapper/322:31:593
3231610996260,1cyclictest0-21swapper/300:27:593
3231610996158,2cyclictest0-21swapper/323:47:583
3231605996156,4cyclictest3282739-21kworker/u8:1+events_unbound22:00:201
3231605996154,6cyclictest3234642-21kworker/u8:0+flush-179:019:25:211
3231601996145,12cyclictest3300529-21kworker/u8:3+flush-179:022:50:010
3231605995955,3cyclictest3292489-21kworker/u8:0+flush-179:022:40:211
3231601995949,7cyclictest3244279-21kworker/u8:0+flush-179:020:10:160
3231605995853,4cyclictest3292489-21kworker/u8:0+flush-179:022:30:251
3231605995752,4cyclictest3231447-21kworker/u8:3+flush-179:019:35:251
3231601995750,4cyclictest3311589-21kworker/u8:2+flush-179:023:45:150
3231605995651,4cyclictest3247470-21kworker/u8:2+events_unbound20:15:001
3231605995645,9cyclictest1213033-21systemd-journal19:45:001
3231601995646,7cyclictest3311589-21kworker/u8:2+flush-179:023:25:150
3231605995550,4cyclictest3323946-21kworker/u8:0+events_unbound00:15:231
3231610995451,2cyclictest0-21swapper/321:17:583
3231601995445,8cyclictest3308691-21apt-get23:10:100
323160199541,2cyclictest714-21Xorg19:53:580
3231601995346,5cyclictest3294115-21latency_hist22:25:010
3231601995346,4cyclictest3258816-21latency_hist20:35:010
3231601995341,10cyclictest3239704-21apt-get19:35:120
3231601995336,14cyclictest3324913-40mandb00:00:010
3231605995246,5cyclictest714-21Xorg00:10:001
3231605995246,5cyclictest714-21Xorg00:10:001
3231601995246,5cyclictest3337682-21apt00:40:000
3231607995147,2cyclictest0-21swapper/220:50:592
323160199511,48cyclictest3326497-21systemd00:04:000
3231601995044,4cyclictest3231447-21kworker/u8:3+events_unbound19:10:370
3231601995042,6cyclictest1213033-21systemd-journal22:32:590
3231601995041,7cyclictest3321932-21/usr/sbin/munin23:50:220
3231601995041,7cyclictest1213033-21systemd-journal20:30:010
323160199501,45cyclictest3317077-21apt-key23:35:010
3231605994943,4cyclictest3321158-21kworker/u8:3+events_unbound23:50:231
3231605994941,6cyclictest3291173-21apt-get22:15:121
3231601994942,5cyclictest3300486-21latency_hist22:45:010
3231601994926,19cyclictest0-21swapper/020:55:140
3231601994844,3cyclictest3323946-21kworker/u8:0+flush-179:000:20:250
3231601994830,15cyclictest510-21rs:main0
4577091470,13ptp4l441ktimers/319:10:013
3231601994738,8cyclictest3323946-21kworker/u8:0+events_unbound00:30:240
3231601994738,8cyclictest3323946-21kworker/u8:0+events_unbound00:30:230
323160199470,31cyclictest3317093-21cmp23:35:010
323161099460,4cyclictest3245828-21turbostat19:54:593
3231601994637,7cyclictest3282694-21kworker/u8:0+events_unbound22:10:010
3231601994633,11cyclictest3295739-21systemd-run22:30:010
3231601994539,5cyclictest3300529-21kworker/u8:3+flush-179:022:50:190
3231601994535,7cyclictest3231447-21kworker/u8:3+events_unbound19:45:130
3231601994436,6cyclictest3333147-21/usr/sbin/munin00:25:180
3231601994435,7cyclictest3270222-21apt-get21:10:120
323161099430,42cyclictest3302084-21turbostat22:50:003
3231607994340,2cyclictest0-21swapper/219:41:592
323160799430,40cyclictest0-21swapper/221:29:002
3231610994241,1cyclictest0-21swapper/321:03:583
3231605994237,4cyclictest3231447-21kworker/u8:3+events_unbound19:10:401
3231601994238,3cyclictest3249066-21systemd-run20:05:010
3231601994238,3cyclictest3249066-21systemd-run20:05:000
3231601994234,6cyclictest3242645-21latency_hist19:45:020
3231601994233,7cyclictest3274719-21kworker/u8:2+flush-179:021:45:220
323161099410,39cyclictest3331321-21turbostat00:20:003
323161099410,39cyclictest3237868-21turbostat19:30:003
3231601994136,3cyclictest3268914-21kworker/u8:1+flush-179:021:15:260
3231601994136,3cyclictest3234678-21idleruntime-cro19:20:010
3231601994132,6cyclictest3231447-21kworker/u8:3+flush-179:019:30:200
323160199410,1cyclictest0-21swapper/020:05:040
3231610994034,5cyclictest3313487-21turbostat23:25:003
323161099400,38cyclictest3269976-21turbostat21:10:013
3231607994037,2cyclictest0-21swapper/222:05:592
3231601994024,13cyclictest1213033-21systemd-journal21:36:240
323160199401,38cyclictest1213033-21systemd-journal00:10:000
323160199401,38cyclictest1213033-21systemd-journal00:09:590
323160199400,38cyclictest3305257-21cut23:00:010
323161099390,4cyclictest3289086-21turbostat22:10:003
323161099390,38cyclictest3323283-21turbostat23:55:003
3231601993932,5cyclictest1213033-21systemd-journal00:20:000
3231601993926,10cyclictest1213033-21systemd-journal22:19:560
3231601993923,14cyclictest510-21rs:main0
3231610993833,4cyclictest3252448-21turbostat20:15:003
323161099380,1cyclictest0-21swapper/319:17:003
3231605993834,3cyclictest3274719-21kworker/u8:2+events_unbound21:45:251
323160199385,19cyclictest3262025-21turbostat20:49:560
3231601993835,2cyclictest0-21swapper/021:32:580
3231601993829,7cyclictest3244279-21kworker/u8:0+flush-179:019:55:250
323160199380,37cyclictest0-21swapper/020:20:580
3231610993735,1cyclictest0-21swapper/323:25:593
3231607993734,2cyclictest0-21swapper/219:47:002
323160799370,35cyclictest0-21swapper/219:11:592
3231601993732,4cyclictest3260412-21turbostat20:44:550
3231601993724,11cyclictest1213033-21systemd-journal21:52:240
4577091360,28ptp4l441ktimers/320:45:143
3231610993634,1cyclictest0-21swapper/321:29:593
3231610993630,4cyclictest3295710-21turbostat22:30:003
323161099360,35cyclictest0-21swapper/320:44:593
323161099360,35cyclictest0-21swapper/300:24:593
323161099360,1cyclictest0-21swapper/320:39:593
3231607993633,2cyclictest0-21swapper/220:08:582
323160799360,1cyclictest0-21swapper/222:23:592
3231605993632,3cyclictest3266827-21kworker/u8:0+events_unbound21:00:261
3231601993632,3cyclictest3236273-21cron19:25:000
3231601993621,13cyclictest3320113-21cron23:45:010
3231610993533,1cyclictest0-21swapper/322:39:003
3231610993533,1cyclictest0-21swapper/319:49:583
3231610993532,2cyclictest0-21swapper/320:00:003
3231607993532,2cyclictest0-21swapper/221:16:592
3231601993530,4cyclictest3297267-21kworker/u8:1+flush-179:022:35:240
3231601993527,7cyclictest3311642-21apt-get23:20:030
3231610993432,1cyclictest0-21swapper/323:13:003
3231610993432,1cyclictest0-21swapper/322:11:593
3231610993432,1cyclictest0-21swapper/320:33:593
3231610993429,4cyclictest3282712-21turbostat21:50:003
3231607993432,1cyclictest0-21swapper/200:19:592
3231607993431,2cyclictest0-21swapper/220:10:592
3231601993425,5cyclictest3274785-21kworker/u8:3+flush-179:021:40:160
3231610993331,1cyclictest0-21swapper/323:02:593
3231610993331,1cyclictest0-21swapper/321:38:593
3231607993330,2cyclictest0-21swapper/221:56:592
3231607993330,2cyclictest0-21swapper/220:19:592
323160799330,27cyclictest0-21swapper/223:10:122
3231601993315,16cyclictest3237327-21uname19:25:220
3231610993230,1cyclictest0-21swapper/321:59:553
3231607993229,2cyclictest0-21swapper/223:01:592
3231607993227,4cyclictest0-21swapper/223:25:132
323160799320,2cyclictest0-21swapper/223:35:002
323160199322,25cyclictest714-21Xorg20:35:580
3231601993215,15cyclictest1213033-21systemd-journal22:13:240
3231607993128,2cyclictest0-21swapper/222:47:592
323160799310,29cyclictest0-21swapper/223:40:112
3231601993123,6cyclictest3267031-21/usr/sbin/munin21:00:170
323160199310,2cyclictest714-21Xorg22:00:590
4577091300,7ptp4l441ktimers/300:05:023
4577091300,7ptp4l441ktimers/300:05:013
3231610993028,1cyclictest0-21swapper/321:14:593
3231607993027,2cyclictest0-21swapper/223:05:132
3231607993022,1cyclictest0-21swapper/220:49:552
3231607993021,2cyclictest0-21swapper/223:49:592
3231607993021,2cyclictest0-21swapper/220:21:592
3231607993021,2cyclictest0-21swapper/200:32:592
3231607993021,2cyclictest0-21swapper/200:32:592
4577091290,7ptp4l441ktimers/320:25:003
4577091290,7ptp4l441ktimers/320:20:003
3231610992927,1cyclictest0-21swapper/323:30:583
3231610992927,1cyclictest0-21swapper/322:52:593
3231610992927,1cyclictest0-21swapper/320:55:593
323161099290,28cyclictest0-21swapper/323:35:033
323161099290,28cyclictest0-21swapper/321:30:133
323161099290,27cyclictest0-21swapper/300:35:123
323161099290,27cyclictest0-21swapper/300:30:133
323161099290,27cyclictest0-21swapper/300:30:123
3231607992926,2cyclictest0-21swapper/223:18:592
3231607992926,2cyclictest0-21swapper/221:24:552
3231607992926,2cyclictest0-21swapper/220:55:152
3231607992926,2cyclictest0-21swapper/220:01:002
3231607992926,2cyclictest0-21swapper/220:01:002
3231607992926,2cyclictest0-21swapper/200:05:132
3231607992926,2cyclictest0-21swapper/200:05:122
323160799290,27cyclictest0-21swapper/221:40:142
323160799290,27cyclictest0-21swapper/221:10:142
323160799290,27cyclictest0-21swapper/220:40:132
323160799290,27cyclictest0-21swapper/200:35:122
4577091280,6ptp4l441ktimers/322:20:003
3231610992826,1cyclictest0-21swapper/319:10:263
3231610992825,2cyclictest0-21swapper/322:20:133
323161099280,27cyclictest0-21swapper/320:05:123
323161099280,26cyclictest0-21swapper/322:00:133
323161099280,26cyclictest0-21swapper/319:40:133
3231607992825,2cyclictest0-21swapper/222:59:002
3231607992825,2cyclictest0-21swapper/220:34:592
3231607992825,2cyclictest0-21swapper/219:15:132
3231607992825,2cyclictest0-21swapper/200:22:592
3231607992822,5cyclictest0-21swapper/221:39:552
323160799280,2cyclictest0-21swapper/221:50:112
323160799280,26cyclictest0-21swapper/223:31:592
323160799280,26cyclictest0-21swapper/220:25:132
323160799280,21cyclictest0-21swapper/219:50:122
323160199289,17cyclictest3231657-21wc19:10:020
4577091270,6ptp4l441ktimers/321:24:563
4577091270,6ptp4l441ktimers/320:55:003
4577091270,6ptp4l441ktimers/319:35:003
4577091270,6ptp4l441ktimers/319:25:013
4577091270,6ptp4l441ktimers/300:14:563
4577091270,5ptp4l441ktimers/323:44:553
3231610992725,1cyclictest0-21swapper/323:58:593
3231610992725,1cyclictest0-21swapper/323:19:593
3231610992725,1cyclictest0-21swapper/320:30:003
323161099270,26cyclictest0-21swapper/321:43:003
323161099270,26cyclictest0-21swapper/300:03:593
323161099270,1cyclictest0-21swapper/323:06:593
323161099270,1cyclictest0-21swapper/319:39:593
3231607992724,2cyclictest0-21swapper/221:02:582
3231607992724,2cyclictest0-21swapper/219:58:592
3231607992723,2cyclictest0-21swapper/222:31:592
323160799270,25cyclictest0-21swapper/219:25:592
323160799270,24cyclictest0-21swapper/222:28:592
4577091260,6ptp4l441ktimers/322:45:003
4577091260,5ptp4l441ktimers/321:54:553
4577091260,5ptp4l441ktimers/320:04:563
4577091260,5ptp4l441ktimers/320:04:553
3231607992623,2cyclictest0-21swapper/221:30:132
3231607992622,2cyclictest0-21swapper/200:27:582
323160799260,2cyclictest0-21swapper/222:18:592
323160799260,24cyclictest0-21swapper/220:36:592
323160799260,1cyclictest0-21swapper/222:35:592
3231607992523,1cyclictest0-21swapper/221:09:592
3231607992522,2cyclictest0-21swapper/223:53:592
3231607992522,2cyclictest0-21swapper/219:23:582
323160799250,2cyclictest0-21swapper/219:37:582
323160799250,2cyclictest0-21swapper/200:11:002
3231607992422,1cyclictest0-21swapper/222:54:592
3231607992422,1cyclictest0-21swapper/221:50:002
3231607992422,1cyclictest0-21swapper/200:04:592
3231607992421,2cyclictest0-21swapper/222:43:592
3231607992421,2cyclictest0-21swapper/219:34:592
3231610992310,12cyclictest67-21kworker/3:1+events23:00:013
3231607992119,1cyclictest0-21swapper/222:04:592
231999210,9rtkit-daemon688-21lldpd19:07:411
3231607991916,2cyclictest0-21swapper/223:20:592
3231607991513,1cyclictest0-21swapper/222:15:002
3231607991210,1cyclictest0-21swapper/223:56:002
32316079930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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