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2026-08-10 - 19:05
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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 Mon Aug 10, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
350087299142133,7cyclictest3592843-21latency_hist11:55:020
350087299136118,15cyclictest3600814-21latency_hist12:20:020
350087299136118,15cyclictest3600814-21latency_hist12:20:010
350087299134123,8cyclictest3549611-21latency_hist09:40:020
350087299122115,4cyclictest3551180-21kworker/u8:0+events_unbound09:55:010
350087999119112,5cyclictest3579860-21turbostat11:14:593
350087699118107,8cyclictest3508721-21latency_hist07:35:001
350087299115105,8cyclictest3586232-21apt-get11:35:010
35008769911097,9cyclictest1213033-21systemd-journal10:20:001
35008729910897,9cyclictest1213033-21systemd-journal10:10:010
35008769910788,18cyclictest3516678-21kworker/u8:0+events_unbound09:05:001
35008729910695,8cyclictest3567109-21latency_hist10:35:010
35008769910392,8cyclictest3493381-21kworker/u8:0+flush-179:007:15:001
35008769910192,7cyclictest3525192-21apt-get08:25:121
35008729910184,15cyclictest3557566-21latency_hist10:05:010
3500872999990,7cyclictest3500736-21latency_hist07:10:020
3500872999988,9cyclictest1213033-21systemd-journal07:25:010
3500872999987,9cyclictest3602951-21diskstats12:25:150
3500876999893,3cyclictest3585292-21kworker/u8:0+flush-179:011:55:251
3500876999683,12cyclictest3560781-21kworker/u8:3+flush-179:010:40:011
3500872999689,5cyclictest3571926-21kworker/u8:2+flush-179:011:15:160
3500872999688,6cyclictest3507739-21kworker/u8:1+events_unbound08:25:240
3500872999687,6cyclictest3507739-21kworker/u8:1+flush-179:007:30:210
3500876999588,4cyclictest3551180-21kworker/u8:0+flush-179:010:40:251
3500872999487,5cyclictest3605564-21kworker/u8:1+events_unbound12:35:230
3500872999483,9cyclictest3516678-21kworker/u8:0+flush-179:008:05:170
3500872999483,8cyclictest1213033-21systemd-journal09:10:270
3500872999382,8cyclictest3560781-21kworker/u8:3+flush-179:010:50:220
3500872999285,5cyclictest3551180-21kworker/u8:0+flush-179:010:35:220
3500872999284,5cyclictest3515112-21latency_hist07:55:000
3500872999283,6cyclictest3532892-21latency_hist08:50:020
3500872999084,5cyclictest3544545-21kworker/u8:2+flush-179:009:34:560
3500872999084,5cyclictest3507739-21kworker/u8:1+flush-179:008:10:260
3500872999077,10cyclictest1213033-21systemd-journal10:50:000
3500876998981,6cyclictest3573512-21kworker/u8:1+flush-179:011:30:011
3500876998780,4cyclictest3583277-21kworker/u8:2+events_unbound11:40:011
3500876998775,9cyclictest1213033-21systemd-journal11:30:151
3500872998781,4cyclictest3592879-21kworker/u8:1+flush-179:012:00:230
3500872998778,6cyclictest3528111-21latency_hist08:35:020
3500876998680,5cyclictest3516678-21kworker/u8:0+flush-179:009:15:281
3500872998675,8cyclictest3560781-21kworker/u8:3+events_unbound10:40:120
3500876998576,6cyclictest3516678-21kworker/u8:0+flush-179:009:10:161
3500876998563,19cyclictest3513525-21latency_hist07:50:011
3500872998579,5cyclictest3583277-21kworker/u8:2+events_unbound12:15:010
3500872998476,6cyclictest3573512-21kworker/u8:1+flush-179:011:00:010
3500872998471,4cyclictest3544545-21kworker/u8:2+events_unbound09:30:000
3500872998470,11cyclictest1213033-21systemd-journal09:25:000
3500876998376,3cyclictest3537652-21kworker/u8:2+flush-179:009:05:221
3500876998362,18cyclictest1213033-21systemd-journal07:59:591
3500872998376,4cyclictest3516678-21kworker/u8:0+flush-179:008:55:230
3500876998276,4cyclictest3552813-21kworker/u8:1+flush-179:010:05:271
3500876998173,6cyclictest3583277-21kworker/u8:2+flush-179:012:05:221
3500872998172,7cyclictest3538190-21apt-get09:05:100
3500872998073,5cyclictest3588339-21apt-get11:40:120
3500876997970,5cyclictest3559141-21kworker/u8:2+flush-179:010:10:151
3500876997970,5cyclictest3559141-21kworker/u8:2+flush-179:010:10:151
3500876997969,8cyclictest3507132-21latency_hist07:30:001
3500872997972,5cyclictest3541362-21apt-get09:15:130
3500876997868,8cyclictest3597881-21apt-get12:10:111
3500876997774,2cyclictest3552780-21latency_hist09:50:021
3500876997770,5cyclictest3551180-21kworker/u8:0+flush-179:010:00:271
3500872997771,4cyclictest3497785-21kworker/u8:2+flush-179:008:00:220
3500872997768,4cyclictest3551180-21kworker/u8:0+flush-179:009:55:150
3500876997666,7cyclictest3533434-21diskstats08:50:161
3500872997670,4cyclictest3583297-21apt-get11:25:110
3500876997565,8cyclictest3504218-21apt-get07:20:121
3500876997564,8cyclictest3507739-21kworker/u8:1+flush-179:007:40:211
3500876997555,17cyclictest3517237-21apt-get08:00:121
3500872997569,4cyclictest3497785-21kworker/u8:2+flush-179:007:20:000
3500872997566,8cyclictest3544545-21kworker/u8:2+flush-179:009:45:010
3500872997565,8cyclictest3501021-21apt-get07:10:110
3500876997467,4cyclictest3516678-21kworker/u8:0+events_unbound08:10:011
3500872997466,6cyclictest3593100-21apt-get11:55:130
3500876997363,8cyclictest3513559-21kworker/u8:3+events_unbound07:50:241
3500876997264,6cyclictest3592879-21kworker/u8:1+flush-179:012:15:151
3500876997264,6cyclictest3592879-21kworker/u8:1+flush-179:012:15:151
3500876997264,6cyclictest3573512-21kworker/u8:1+flush-179:011:20:251
3500876997260,9cyclictest3602443-21kworker/u8:2+events_unbound12:30:251
3500876997161,8cyclictest510-21rs:main1
3500876997059,9cyclictest3562603-21apt-get10:20:111
3500876997059,8cyclictest3507739-21kworker/u8:1+flush-179:008:10:261
3500876997050,17cyclictest3564189-21apt-get10:25:121
3500872997064,4cyclictest3579893-21kworker/u8:0+events_unbound11:20:230
3500876996963,4cyclictest3544545-21kworker/u8:2+events_unbound09:25:241
3500876996959,8cyclictest3560781-21kworker/u8:3+flush-179:010:50:001
3500872996961,6cyclictest3516678-21kworker/u8:0+flush-179:009:00:290
3500872996957,9cyclictest3576672-21latency_hist11:05:010
3500876996862,4cyclictest3560781-21kworker/u8:3+flush-179:010:50:261
3500872996860,5cyclictest3516678-21kworker/u8:0+events_unbound08:40:210
3500876996761,4cyclictest3551180-21kworker/u8:0+flush-179:009:50:161
3500876996759,6cyclictest3573512-21kworker/u8:1+events_unbound11:00:141
350087799660,59cyclictest0-21swapper/209:11:582
3500876996663,2cyclictest3516678-21kworker/u8:0+flush-179:008:46:351
3500872996660,4cyclictest3508702-21kworker/u8:3+flush-179:007:35:240
3500872996658,6cyclictest3507739-21kworker/u8:1+flush-179:008:20:190
3500876996558,5cyclictest3551180-21kworker/u8:0+flush-179:010:30:271
3500876996557,6cyclictest3516678-21kworker/u8:0+flush-179:008:35:001
3500872996560,4cyclictest3551180-21kworker/u8:0+flush-179:010:25:190
3500872996558,5cyclictest1213033-21systemd-journal12:34:590
3500879996459,4cyclictest0-21swapper/308:17:003
3500876996458,4cyclictest3585292-21kworker/u8:0+flush-179:011:40:221
3500876996458,4cyclictest3516678-21kworker/u8:0+events_unbound08:35:241
3500872996458,5cyclictest3516678-21kworker/u8:0+flush-179:008:35:150
3500872996454,7cyclictest3507739-21kworker/u8:1+flush-179:008:15:150
3500877996360,2cyclictest0-21swapper/209:46:592
3500876996352,9cyclictest3601077-21apt-get12:20:121
3500879996259,1cyclictest0-21swapper/307:47:593
3500876996256,4cyclictest3573512-21kworker/u8:1+events_unbound11:15:251
3500879996159,1cyclictest0-21swapper/308:24:583
3500872996154,5cyclictest3497785-21kworker/u8:2+flush-179:007:40:160
3500872996153,7cyclictest3601485-21kworker/u8:0+events_unbound12:25:000
3500879996058,1cyclictest0-21swapper/307:24:593
3500872996054,5cyclictest3583277-21kworker/u8:2+flush-179:012:05:260
3500872996054,4cyclictest3544545-21kworker/u8:2+flush-179:009:45:140
3500876995952,5cyclictest3521994-21apt-get08:15:111
3500876995950,6cyclictest3583277-21kworker/u8:2+flush-179:011:45:201
3500872995955,3cyclictest3531289-21kworker/u8:1+flush-179:008:53:350
3500872995954,4cyclictest3573512-21kworker/u8:1+flush-179:011:05:210
3500872995952,5cyclictest3497785-21kworker/u8:2+flush-179:007:25:130
3500872995949,8cyclictest3585292-21kworker/u8:0+flush-179:011:50:000
3500879995855,2cyclictest0-21swapper/310:20:593
3500876995850,5cyclictest3516678-21kworker/u8:0+flush-179:008:40:151
3500872995851,5cyclictest3551180-21kworker/u8:0+events_unbound10:20:220
3500876995750,5cyclictest3573512-21kworker/u8:1+flush-179:011:10:201
3500876995749,5cyclictest3544545-21kworker/u8:2+flush-179:009:40:151
3500876995748,7cyclictest1213033-21systemd-journal12:40:001
3500876995745,9cyclictest1213033-21systemd-journal10:00:001
3500876995649,5cyclictest3585292-21kworker/u8:0+events_unbound11:50:141
3500872995650,5cyclictest3559141-21kworker/u8:2+flush-179:010:10:250
3500872995650,5cyclictest3559141-21kworker/u8:2+flush-179:010:10:250
3500872995648,7cyclictest3497785-21kworker/u8:2+flush-179:007:55:220
3500877995452,1cyclictest0-21swapper/210:09:592
3500876995346,5cyclictest3544545-21kworker/u8:2+events_unbound09:35:131
3500872995348,4cyclictest3573512-21kworker/u8:1+flush-179:011:10:200
3500879995249,2cyclictest0-21swapper/309:33:593
3500876995245,6cyclictest3516678-21kworker/u8:0+events_unbound08:55:291
3500876995244,6cyclictest3601485-21kworker/u8:0+events_unbound12:25:251
3500876995242,7cyclictest3524938-21latency_hist08:25:011
3500872995244,6cyclictest3507739-21kworker/u8:1+flush-179:007:45:180
3500872995143,6cyclictest3551180-21kworker/u8:0+flush-179:010:15:250
3500879995043,5cyclictest3508733-21turbostat07:34:593
3500876995044,5cyclictest3571926-21kworker/u8:2+flush-179:010:55:231
3500872995046,3cyclictest3585292-21kworker/u8:0+flush-179:011:36:360
4577091470,13ptp4l61490irq/134-eno1-TxRx-007:09:563
3500877994744,2cyclictest0-21swapper/208:55:592
3500876994740,5cyclictest3485187-21kworker/u8:1+flush-179:007:15:261
3500876994628,2cyclictest321-21hwrng09:34:561
3500876994539,4cyclictest3508702-21kworker/u8:3+flush-179:007:35:221
3500877994440,2cyclictest0-21swapper/212:17:002
3500877994440,2cyclictest0-21swapper/212:16:592
3500879994336,5cyclictest3531319-21turbostat08:45:003
3500877994340,2cyclictest0-21swapper/207:13:592
3500876994236,5cyclictest3592879-21kworker/u8:1+flush-179:012:05:011
350087799410,2cyclictest0-21swapper/209:23:592
350087799402,36cyclictest0-21swapper/207:33:002
3500876994035,4cyclictest3573512-21kworker/u8:1+events_unbound11:05:211
3500879993937,1cyclictest0-21swapper/312:23:593
3500879993937,1cyclictest0-21swapper/311:44:003
350087799390,36cyclictest0-21swapper/211:26:592
350087999380,30cyclictest0-21swapper/312:30:593
3500877993835,2cyclictest0-21swapper/211:20:592
3500877993834,2cyclictest0-21swapper/210:59:002
3500877993834,2cyclictest0-21swapper/207:58:582
350087799380,35cyclictest0-21swapper/211:10:002
350087799380,35cyclictest0-21swapper/209:19:552
350087799380,35cyclictest0-21swapper/207:36:592
3500879993734,2cyclictest0-21swapper/310:49:553
3500879993734,2cyclictest0-21swapper/309:11:583
3500877993734,2cyclictest0-21swapper/211:33:592
3500877993734,2cyclictest0-21swapper/210:32:592
350087799370,35cyclictest0-21swapper/209:09:592
3500879993634,1cyclictest0-21swapper/312:01:593
3500879993634,1cyclictest0-21swapper/308:53:593
3500879993633,2cyclictest0-21swapper/308:39:553
350087999360,35cyclictest0-21swapper/309:45:593
3500877993633,2cyclictest0-21swapper/212:03:002
3500877993633,2cyclictest0-21swapper/208:03:002
3500877993632,2cyclictest0-21swapper/209:42:002
350087799360,1cyclictest0-21swapper/212:14:552
3500879993533,1cyclictest0-21swapper/310:54:593
3500879993533,1cyclictest0-21swapper/310:40:593
3500879993533,1cyclictest0-21swapper/308:12:593
3500879993532,2cyclictest0-21swapper/311:36:593
3500877993532,2cyclictest0-21swapper/210:10:592
3500877993532,2cyclictest0-21swapper/210:10:592
350087799350,1cyclictest0-21swapper/211:03:582
350087799350,1cyclictest0-21swapper/210:25:002
350087799350,1cyclictest0-21swapper/209:54:552
3500879993432,1cyclictest0-21swapper/311:32:593
3500877993431,2cyclictest0-21swapper/212:23:582
3500879993331,1cyclictest0-21swapper/307:26:593
3500877993331,1cyclictest0-21swapper/208:24:592
3500877993330,2cyclictest0-21swapper/209:31:592
3500879993230,1cyclictest0-21swapper/308:58:583
3500879993230,1cyclictest0-21swapper/308:25:583
3500877993128,2cyclictest0-21swapper/208:47:592
3500877993128,2cyclictest0-21swapper/208:05:592
3500879993027,2cyclictest0-21swapper/309:35:133
350087999300,28cyclictest0-21swapper/308:00:133
3500877993027,2cyclictest0-21swapper/208:40:582
3500877993027,2cyclictest0-21swapper/208:10:582
3500877993027,2cyclictest0-21swapper/207:42:582
350087799300,28cyclictest0-21swapper/211:35:142
3500879992926,2cyclictest0-21swapper/307:35:133
350087999290,28cyclictest0-21swapper/309:05:023
350087999290,27cyclictest0-21swapper/309:20:143
350087999290,26cyclictest0-21swapper/311:20:163
350087999290,26cyclictest0-21swapper/309:50:143
350087999290,1cyclictest0-21swapper/311:55:143
350087999290,1cyclictest0-21swapper/311:15:123
3500877992927,1cyclictest0-21swapper/212:40:002
3500877992926,2cyclictest0-21swapper/210:50:142
3500877992926,2cyclictest0-21swapper/210:15:122
3500877992926,2cyclictest0-21swapper/207:15:132
350087799290,28cyclictest0-21swapper/208:25:122
350087799290,27cyclictest0-21swapper/212:29:002
350087799290,27cyclictest0-21swapper/211:50:122
350087799290,27cyclictest0-21swapper/211:15:122
350087799290,27cyclictest0-21swapper/209:30:022
4577091280,6ptp4l441ktimers/311:55:013
4577091280,6ptp4l441ktimers/311:30:013
4577091280,6ptp4l441ktimers/310:00:003
3500879992826,1cyclictest0-21swapper/312:15:113
3500879992826,1cyclictest0-21swapper/312:15:103
3500879992826,1cyclictest0-21swapper/308:30:143
350087999280,2cyclictest0-21swapper/309:25:133
350087999280,27cyclictest0-21swapper/310:35:133
350087999280,26cyclictest0-21swapper/310:10:133
350087999280,26cyclictest0-21swapper/310:10:133
350087799280,26cyclictest0-21swapper/211:55:142
350087799280,26cyclictest0-21swapper/209:55:142
4577091270,7ptp4l441ktimers/308:00:013
4577091270,6ptp4l441ktimers/312:15:013
4577091270,6ptp4l441ktimers/310:20:013
3500879992725,1cyclictest0-21swapper/308:46:003
3500879992724,2cyclictest0-21swapper/312:06:593
3500879992724,2cyclictest0-21swapper/310:02:593
350087999270,26cyclictest0-21swapper/310:25:143
350087999270,26cyclictest0-21swapper/309:15:593
350087999270,1cyclictest0-21swapper/307:10:123
350087799270,1cyclictest0-21swapper/211:48:592
350087799270,1cyclictest0-21swapper/210:36:592
4577091260,6ptp4l441ktimers/311:50:003
4577091260,5ptp4l441ktimers/311:09:563
4577091260,5ptp4l441ktimers/311:04:563
4577091260,5ptp4l441ktimers/310:10:003
4577091260,5ptp4l441ktimers/309:05:013
4577091260,4ptp4l441ktimers/308:09:563
3500879992624,1cyclictest0-21swapper/309:40:123
3500879992623,2cyclictest0-21swapper/307:54:583
3500877992623,2cyclictest0-21swapper/210:41:592
3500877992623,2cyclictest0-21swapper/210:26:592
3500877992623,2cyclictest0-21swapper/207:53:582
350087799260,2cyclictest0-21swapper/210:46:592
350087799260,24cyclictest0-21swapper/212:07:582
4577091250,6ptp4l61490irq/134-eno1-TxRx-010:35:013
4577091250,5ptp4l61490irq/134-eno1-TxRx-012:29:553
4577091250,4ptp4l441ktimers/307:45:013
350087999250,24cyclictest0-21swapper/307:19:543
3500877992523,1cyclictest0-21swapper/210:05:002
3500877992522,2cyclictest0-21swapper/207:48:002
350087999240,1cyclictest0-21swapper/310:57:583
3500877992422,1cyclictest0-21swapper/212:35:012
3500877992422,1cyclictest0-21swapper/209:04:592
3500877992421,2cyclictest0-21swapper/211:43:002
3500877992421,2cyclictest0-21swapper/208:50:152
4577091230,4ptp4l61490irq/134-eno1-TxRx-012:39:563
3500877992219,2cyclictest0-21swapper/208:33:592
3500877992219,2cyclictest0-21swapper/208:17:002
3500877992119,1cyclictest0-21swapper/207:24:582
3500877992018,1cyclictest0-21swapper/211:15:002
3500877991815,2cyclictest0-21swapper/207:25:152
3500877991311,1cyclictest0-21swapper/208:35:142
350087699139,3cyclictest3488329-1kworker/1:0H+mmc_complete07:10:021
35008779996,2cyclictest0-21swapper/209:37:592
35008779930,2cyclictest0-21swapper/207:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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