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2026-07-26 - 04:04
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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 376 highest latencies:
System rackeslot6.osadl.org (updated Sun Jul 26, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
334061799137127,8cyclictest1213033-21systemd-journal22:30:000
334062299136110,23cyclictest3406730-21latency_hist22:35:011
334062299133117,13cyclictest3444195-21latency_hist00:30:011
334062299131121,7cyclictest3390823-21latency_hist21:45:011
334061799131111,6cyclictest3413345-21kworker/u8:0+events_unbound22:55:150
334061799128113,12cyclictest1213033-21systemd-journal19:55:010
334061799125119,4cyclictest3434588-21kworker/u8:0+events_unbound00:05:280
334061799125118,6cyclictest3338958-21kworker/u8:3+events_unbound19:10:030
334061799124119,4cyclictest3444452-21kworker/u8:2+flush-179:000:35:250
334061799123109,11cyclictest1213033-21systemd-journal22:55:000
334061799119114,4cyclictest3376279-21kworker/u8:3+events_unbound21:05:240
334061799119113,4cyclictest3428980-21kworker/u8:3+events_unbound00:00:250
334061799118113,4cyclictest3360555-21kworker/u8:0+events_unbound20:15:000
334061799117110,5cyclictest3392397-21kworker/u8:2+flush-179:021:50:260
334061799117110,5cyclictest3335711-21kworker/u8:1+flush-179:019:15:230
334061799116109,5cyclictest3361948-21kworker/u8:3+events_unbound20:30:240
334061799115109,4cyclictest3410219-21kworker/u8:1+flush-179:023:10:240
334061799115109,4cyclictest3410219-21kworker/u8:1+flush-179:023:10:230
334062299114106,6cyclictest1213033-21systemd-journal22:10:001
334061799114108,4cyclictest3431107-21kworker/u8:1+flush-179:000:30:270
334062299113102,9cyclictest705801-21cups-browsed00:00:011
334061799113108,4cyclictest3392402-21kworker/u8:3+flush-179:022:00:240
334061799113108,4cyclictest3392402-21kworker/u8:3+flush-179:022:00:230
33406179911298,10cyclictest510-21rs:main0
334062299110101,5cyclictest3360555-21kworker/u8:0+flush-179:020:35:181
33406179911098,8cyclictest3408599-21latency_hist22:40:010
334061799110103,5cyclictest3385445-21kworker/u8:2+flush-179:021:30:210
334061799110102,4cyclictest3324555-21kworker/u8:2+events_unbound19:20:240
33406179910899,3cyclictest3416018-21kworker/u8:2+events_unbound23:05:260
33406179910898,7cyclictest3358734-21latency_hist20:05:000
33406229910798,6cyclictest3434588-21kworker/u8:0+flush-179:000:05:001
33406179910796,8cyclictest3411768-21latency_hist22:50:010
334061799107102,4cyclictest3360555-21kworker/u8:0+events_unbound20:15:240
33406179910698,5cyclictest3431107-21kworker/u8:1+events_unbound23:55:220
334061799106101,4cyclictest3349840-21kworker/u8:1+events_unbound20:05:260
334061799106100,4cyclictest3380441-21kworker/u8:0+events_unbound21:15:190
33406229910594,8cyclictest3374635-21latency_hist20:55:001
33406229910486,15cyclictest3442374-21http00:25:011
33406229910392,8cyclictest3400614-21apt-get22:15:131
33406229910296,4cyclictest3324555-21kworker/u8:2+flush-179:019:50:261
33406229910288,11cyclictest1213033-21systemd-journal21:30:251
33406179910293,7cyclictest3426541-21kworker/u8:2+events_unbound23:40:020
33406179910291,9cyclictest3368526-21apt-get20:35:130
33406229910193,5cyclictest3324555-21kworker/u8:2+flush-179:019:45:241
3340617999991,5cyclictest3366676-21kworker/u8:1+events_unbound20:40:220
3340617999989,4cyclictest3376215-21kworker/u8:2+events_unbound21:10:170
3340622999889,6cyclictest3352369-21latency_hist19:45:011
3340617999892,5cyclictest3347634-21wc19:30:010
3340622999793,3cyclictest3366676-21kworker/u8:1+flush-179:020:40:261
3340622999786,8cyclictest3392397-21kworker/u8:2+flush-179:022:45:241
3340617999790,5cyclictest3346048-21kworker/u8:3+events_unbound19:30:230
3340617999786,4cyclictest3387450-21kworker/u8:0+events_unbound21:35:190
3340617999786,4cyclictest3387450-21kworker/u8:0+events_unbound21:35:190
3340622999689,4cyclictest3360318-21latency_hist20:10:011
3340617999685,8cyclictest3365352-21apt-get20:25:120
3340617999685,7cyclictest3419696-21kworker/u8:0+events_unbound23:30:150
3340622999578,13cyclictest1213033-21systemd-journal21:15:231
3340617999590,4cyclictest3324555-21kworker/u8:2+flush-179:019:40:410
3340617999489,4cyclictest3324555-21kworker/u8:2+flush-179:020:20:290
3340617999488,3cyclictest3387450-21kworker/u8:0+flush-179:021:40:120
3340617999486,6cyclictest3382846-21kworker/u8:1+events_unbound21:45:220
3340617999485,7cyclictest3419696-21kworker/u8:0+flush-179:023:20:270
3340622999382,8cyclictest3416018-21kworker/u8:2+flush-179:023:20:221
3340617999380,6cyclictest3428980-21kworker/u8:3+events_unbound23:45:220
3340622999285,5cyclictest3399011-21kworker/u8:1+flush-179:022:10:251
3340622999282,7cyclictest3324555-21kworker/u8:2+flush-179:020:00:231
3340622999282,6cyclictest3444452-21kworker/u8:2+flush-179:000:35:011
3340622999281,8cyclictest3395856-21apt-get22:00:121
3340622999281,8cyclictest3395856-21apt-get22:00:121
3340617999284,5cyclictest3415216-21apt-get23:00:100
3340622999183,6cyclictest3437560-21latency_hist00:10:021
3340622999182,7cyclictest3399011-21kworker/u8:1+flush-179:022:20:261
3340622999180,8cyclictest3431383-21apt-get23:50:131
3340622999180,7cyclictest3419696-21kworker/u8:0+flush-179:023:15:001
3340622999180,7cyclictest3419696-21kworker/u8:0+flush-179:023:15:001
3340617999086,3cyclictest3371455-21kworker/u8:0+events_unbound20:55:250
3340617999084,4cyclictest3382846-21kworker/u8:1+flush-179:021:25:270
3340617998882,4cyclictest3371453-21kworker/u8:3+flush-179:020:45:160
3340617998781,4cyclictest3382846-21kworker/u8:1+flush-179:021:20:210
3340617998777,8cyclictest3395602-21latency_hist22:00:020
3340622998676,7cyclictest3380441-21kworker/u8:0+flush-179:021:10:221
3340617998680,4cyclictest3440789-21kworker/u8:0+flush-179:000:20:260
3340617998680,4cyclictest3419696-21kworker/u8:0+flush-179:023:15:240
3340622998572,10cyclictest3427678-21apt-get23:39:591
3340622998570,10cyclictest1213033-21systemd-journal00:20:001
3340617998580,4cyclictest3324555-21kworker/u8:2+flush-179:019:45:240
3340622998475,7cyclictest3380441-21kworker/u8:0+flush-179:021:25:001
3340617998478,5cyclictest3406773-21true22:35:000
3340617998378,4cyclictest3438221-21kworker/u8:2+flush-179:000:15:280
3340617998276,4cyclictest3428980-21kworker/u8:3+flush-179:023:50:150
3340622998174,5cyclictest3324555-21kworker/u8:2+flush-179:019:55:181
3340622998173,5cyclictest3376230-21latency_hist21:00:011
3340622998169,8cyclictest3324555-21kworker/u8:2+events_unbound20:20:231
3340617998177,3cyclictest3397446-21kworker/u8:0+flush-179:022:05:230
3340617998170,4cyclictest3419696-21kworker/u8:0+events_unbound23:35:180
3340622997972,4cyclictest3338958-21kworker/u8:3+events_unbound19:10:261
3340617997974,4cyclictest3392397-21kworker/u8:2+flush-179:022:15:210
3340617997974,3cyclictest3376279-21kworker/u8:3+flush-179:021:00:210
3340622997870,6cyclictest3386041-21latency_hist21:30:001
3340622997869,6cyclictest3431107-21kworker/u8:1+events_unbound00:40:001
3340622997867,8cyclictest3405179-21kworker/u8:0+flush-179:022:40:221
3340622997864,11cyclictest3434588-21kworker/u8:0+events_unbound00:10:141
3340617997870,6cyclictest3424479-21kworker/u8:1+flush-179:023:30:000
3340617997870,6cyclictest3371455-21kworker/u8:0+events_unbound20:50:210
3340622997766,9cyclictest3360860-21diskstats20:10:171
3340622997668,5cyclictest3416550-21latency_hist23:05:021
3340622997664,8cyclictest3324555-21kworker/u8:2+flush-179:019:15:031
3340622997563,9cyclictest3419696-21kworker/u8:0+flush-179:023:15:241
3340622997363,7cyclictest3371455-21kworker/u8:0+events_unbound20:50:011
3340617997363,3cyclictest3399011-21kworker/u8:1+events_unbound22:20:200
3340622997262,7cyclictest3416018-21kworker/u8:2+flush-179:023:10:011
3340622997062,6cyclictest3426541-21kworker/u8:2+flush-179:023:40:151
3340622997053,14cyclictest1213033-21systemd-journal22:00:001
3340622996964,3cyclictest3376279-21kworker/u8:3+flush-179:021:05:271
3340617996762,4cyclictest3438221-21kworker/u8:2+events_unbound00:10:230
3340622996656,7cyclictest3346048-21kworker/u8:3+events_unbound19:30:251
3340622996652,10cyclictest3416018-21kworker/u8:2+flush-179:023:25:201
3340617996660,4cyclictest3349840-21kworker/u8:1+flush-179:019:55:240
3340622996556,6cyclictest3419696-21kworker/u8:0+events_unbound23:45:141
3340622996453,8cyclictest3344606-21cat19:20:011
3340622996356,5cyclictest3405179-21kworker/u8:0+flush-179:022:35:241
3340627996260,1cyclictest0-21swapper/323:37:003
3340622996257,4cyclictest3346048-21kworker/u8:3+events_unbound19:30:011
3340622996256,4cyclictest3360555-21kworker/u8:0+events_unbound20:25:251
3340622996153,6cyclictest3376279-21kworker/u8:3+flush-179:021:00:261
3340622996153,5cyclictest3389236-21latency_hist21:40:021
3340622996153,5cyclictest3389236-21latency_hist21:40:011
3340622996152,7cyclictest3361948-21kworker/u8:3+flush-179:020:30:231
3340622996149,9cyclictest3392397-21kworker/u8:2+flush-179:021:55:011
3340622996053,5cyclictest3413345-21kworker/u8:0+flush-179:022:55:261
3340622995852,5cyclictest3399011-21kworker/u8:1+flush-179:022:25:181
3340622995845,10cyclictest3360555-21kworker/u8:0+events_unbound20:15:221
3340622995835,5cyclictest3391078-21apt-get21:45:131
3340622995647,7cyclictest3349431-21apt-get19:35:121
3340622995547,5cyclictest3340418-21latency_hist19:10:021
3340622995547,5cyclictest3340418-21latency_hist19:10:021
3340622995341,8cyclictest3424479-21kworker/u8:1+flush-179:023:30:201
3340617995046,3cyclictest3392397-21kworker/u8:2+events_unbound22:44:550
4577091490,13ptp4l61490irq/134-eno1-TxRx-019:10:023
4577091490,13ptp4l61490irq/134-eno1-TxRx-019:10:013
3340627994942,5cyclictest3424517-21turbostat23:30:003
3340617994942,5cyclictest3399011-21kworker/u8:1+flush-179:022:10:200
3340622994738,6cyclictest3410219-21kworker/u8:1+events_unbound22:50:251
3340625994541,2cyclictest0-21swapper/222:38:592
3340625994339,3cyclictest0-21swapper/220:46:582
3340617994338,4cyclictest3349840-21kworker/u8:1+flush-179:019:37:240
3340627994235,1cyclictest0-21swapper/321:05:593
334062799420,41cyclictest0-21swapper/300:19:583
3340625994239,2cyclictest0-21swapper/200:19:562
3340625993936,2cyclictest0-21swapper/200:39:592
3340625993935,2cyclictest0-21swapper/200:11:592
231999390,29rtkit-daemon2304-21lightdm-gtk-gre19:08:590
231999390,29rtkit-daemon2304-21lightdm-gtk-gre19:08:580
334062799380,2cyclictest0-21swapper/321:32:583
3340625993835,2cyclictest0-21swapper/222:48:592
334062599380,36cyclictest0-21swapper/200:06:592
334062599380,35cyclictest0-21swapper/221:04:552
4577091370,28ptp4l441ktimers/300:20:133
3340625993733,2cyclictest0-21swapper/221:38:002
3340625993733,2cyclictest0-21swapper/221:37:592
334062599370,35cyclictest0-21swapper/220:15:592
334062599370,1cyclictest0-21swapper/223:27:002
3340627993634,1cyclictest0-21swapper/322:27:593
3340627993634,1cyclictest0-21swapper/321:40:593
3340627993634,1cyclictest0-21swapper/320:44:583
3340627993630,4cyclictest3344146-21turbostat19:20:003
334062799360,35cyclictest0-21swapper/323:32:583
334062799360,1cyclictest0-21swapper/322:59:593
3340625993634,1cyclictest0-21swapper/220:34:592
3340625993633,2cyclictest0-21swapper/222:59:002
3340625993633,2cyclictest0-21swapper/222:43:002
3340625993633,2cyclictest0-21swapper/220:57:592
3340625993632,2cyclictest0-21swapper/219:59:552
334062599360,1cyclictest0-21swapper/222:27:002
334062599360,1cyclictest0-21swapper/221:26:592
4577091350,27ptp4l441ktimers/320:35:153
3340627993534,1cyclictest0-21swapper/321:00:593
3340627993533,1cyclictest0-21swapper/323:21:003
3340627993533,1cyclictest0-21swapper/319:44:593
3340627993532,2cyclictest0-21swapper/323:58:003
334062799350,1cyclictest0-21swapper/320:03:593
334062599358,1cyclictest0-21swapper/221:48:592
3340625993532,2cyclictest0-21swapper/220:21:592
3340625993531,2cyclictest0-21swapper/222:24:562
334062599350,1cyclictest0-21swapper/221:44:592
3340627993432,1cyclictest0-21swapper/322:39:553
3340627993432,1cyclictest0-21swapper/322:09:553
3340627993427,5cyclictest3411781-21turbostat22:50:003
3340627993331,1cyclictest0-21swapper/322:42:003
3340625993330,2cyclictest0-21swapper/222:11:002
3340625993329,2cyclictest0-21swapper/220:00:592
3340625993229,2cyclictest0-21swapper/200:32:002
3340625993228,2cyclictest0-21swapper/223:16:582
3340625993228,2cyclictest0-21swapper/222:17:582
3340627993129,1cyclictest0-21swapper/320:32:593
3340627993128,2cyclictest0-21swapper/319:20:593
334062799310,28cyclictest0-21swapper/323:45:583
3340625993128,2cyclictest0-21swapper/219:15:592
4577091300,7ptp4l441ktimers/321:19:593
4577091300,7ptp4l441ktimers/319:50:003
4577091300,7ptp4l441ktimers/319:30:003
3340627993028,1cyclictest0-21swapper/322:15:593
334062799300,29cyclictest0-21swapper/321:29:593
334062799300,29cyclictest0-21swapper/320:16:593
3340625993028,1cyclictest0-21swapper/200:24:592
3340625993027,2cyclictest0-21swapper/223:35:142
334062599300,28cyclictest0-21swapper/219:35:142
4577091290,6ptp4l441ktimers/321:54:563
4577091290,6ptp4l441ktimers/320:50:013
4577091290,2ptp4l431rcuc/300:40:003
3340627992927,1cyclictest0-21swapper/300:09:593
3340627992926,2cyclictest0-21swapper/320:55:143
334062799290,28cyclictest0-21swapper/323:40:043
334062799290,28cyclictest0-21swapper/320:26:593
334062799290,28cyclictest0-21swapper/319:35:133
334062799290,27cyclictest0-21swapper/322:20:143
3340625992926,2cyclictest0-21swapper/221:54:542
3340625992926,2cyclictest0-21swapper/219:45:152
334062599290,27cyclictest0-21swapper/223:40:032
334062599290,27cyclictest0-21swapper/223:20:132
334062599290,27cyclictest0-21swapper/222:00:142
334062599290,27cyclictest0-21swapper/222:00:132
334062599290,27cyclictest0-21swapper/221:15:592
334062599290,27cyclictest0-21swapper/219:40:282
334062599290,27cyclictest0-21swapper/200:00:152
4577091280,6ptp4l441ktimers/300:14:563
4577091280,5ptp4l441ktimers/321:40:013
4577091280,5ptp4l441ktimers/321:40:013
4577091280,5ptp4l441ktimers/319:34:553
3340627992826,1cyclictest0-21swapper/300:33:583
3340627992825,2cyclictest0-21swapper/320:20:593
334062799280,27cyclictest0-21swapper/322:00:143
334062799280,27cyclictest0-21swapper/322:00:133
334062799280,27cyclictest0-21swapper/300:00:143
334062799280,25cyclictest0-21swapper/320:07:593
3340625992825,2cyclictest0-21swapper/223:55:132
3340625992825,2cyclictest0-21swapper/219:23:592
334062599280,26cyclictest0-21swapper/221:58:592
334062599280,26cyclictest0-21swapper/220:25:142
334062599280,26cyclictest0-21swapper/200:29:592
4577091270,6ptp4l61490irq/134-eno1-TxRx-000:30:013
4577091270,6ptp4l441ktimers/320:15:003
4577091270,6ptp4l441ktimers/319:15:013
4577091270,5ptp4l61490irq/134-eno1-TxRx-022:55:003
4577091270,5ptp4l441ktimers/323:54:553
4577091270,5ptp4l441ktimers/323:04:553
4577091270,5ptp4l441ktimers/322:34:543
4577091270,5ptp4l441ktimers/321:24:553
4577091270,5ptp4l441ktimers/319:54:563
4577091270,4ptp4l441ktimers/322:15:003
3340627992725,1cyclictest0-21swapper/323:13:003
3340627992725,1cyclictest0-21swapper/323:12:593
3340625992724,2cyclictest0-21swapper/221:20:582
3340625992724,2cyclictest0-21swapper/219:50:132
334062599270,25cyclictest0-21swapper/219:26:592
334062599270,1cyclictest0-21swapper/220:54:002
4577091260,4ptp4l61490irq/134-eno1-TxRx-021:14:563
3340627992624,1cyclictest0-21swapper/321:57:593
3340627992624,1cyclictest0-21swapper/321:48:593
334062799260,1cyclictest0-21swapper/320:53:003
3340625992623,2cyclictest0-21swapper/223:30:132
3340625992623,2cyclictest0-21swapper/222:31:582
334062599260,2cyclictest0-21swapper/223:12:002
334062599260,2cyclictest0-21swapper/223:11:592
334062599260,2cyclictest0-21swapper/223:00:592
334062599260,2cyclictest0-21swapper/221:08:002
4577091250,5ptp4l61490irq/134-eno1-TxRx-023:09:563
4577091250,4ptp4l61490irq/134-eno1-TxRx-023:19:553
4577091250,4ptp4l441ktimers/319:59:553
3340625992522,2cyclictest0-21swapper/221:33:592
3340625992522,2cyclictest0-21swapper/220:39:592
3340625992422,1cyclictest0-21swapper/222:05:162
3340625992421,2cyclictest0-21swapper/221:14:552
3340625992320,2cyclictest0-21swapper/220:41:592
3340625992118,2cyclictest0-21swapper/223:07:592
3340625992117,2cyclictest0-21swapper/220:10:592
3340625992018,1cyclictest0-21swapper/219:34:592
3340625991815,2cyclictest0-21swapper/223:47:592
3340625991714,2cyclictest0-21swapper/223:50:592
3340625991310,2cyclictest0-21swapper/222:52:592
33406259970,6cyclictest0-21swapper/220:09:512
33406259964,1cyclictest0-21swapper/219:13:232
33406259930,2cyclictest0-21swapper/219:10:032
33406259930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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