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2026-08-08 - 09:29
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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 Sat Aug 08, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
91647199153142,9cyclictest983764-21latency_hist22:40:011
91646899142132,7cyclictest961434-21latency_hist21:30:010
91647199138127,8cyclictest975751-21latency_hist22:15:011
91647199136122,11cyclictest980541-21apt-get22:28:551
91646899136124,9cyclictest510-21rs:main0
91646899131119,9cyclictest954809-21latency_hist21:10:010
91647199130105,22cyclictest1012734-21latency_hist00:10:021
91647199126116,8cyclictest1213033-21systemd-journal23:25:011
91646899120113,5cyclictest1011149-21latency_hist00:05:010
91646899117107,7cyclictest985360-21kworker/u8:2+flush-179:022:45:160
9164719911692,21cyclictest957984-21latency_hist21:20:021
91646899116110,4cyclictest969373-21kworker/u8:1+flush-179:022:00:200
91647199115105,8cyclictest967799-21latency_hist21:50:011
91646899113104,6cyclictest980584-21latency_hist22:30:010
91646899113103,7cyclictest959850-21latency_hist21:25:020
91647199111102,7cyclictest929122-21kworker/u8:2+flush-179:020:15:251
916468991111,104cyclictest1-21systemd23:25:010
91646899109100,7cyclictest951593-21kworker/u8:2+flush-179:021:10:230
9164719910698,5cyclictest935452-21latency_hist20:10:001
9164719910496,6cyclictest919808-21apt-get19:20:121
9164719910390,10cyclictest1213033-21systemd-journal20:45:001
9164719910194,5cyclictest1019109-21latency_hist00:30:011
916468999990,6cyclictest993296-21kworker/u8:2+flush-179:023:10:130
916468999990,6cyclictest993296-21kworker/u8:2+flush-179:023:10:120
916471999790,5cyclictest933333-21kworker/u8:1+events_unbound20:15:011
916471999788,6cyclictest924296-21kworker/u8:3+flush-179:019:45:171
916471999787,7cyclictest999945-21latency_hist23:30:011
916471999786,8cyclictest927740-21kworker/u8:0+flush-179:019:50:161
916471999689,5cyclictest922979-21apt-get19:30:101
916471999688,5cyclictest953258-21kworker/u8:3+flush-179:021:30:151
916471999688,5cyclictest953258-21kworker/u8:3+flush-179:021:30:151
916468999688,6cyclictest1020694-21latency_hist00:35:020
916471999581,6cyclictest914868-21kworker/u8:1+events_unbound19:40:001
916471999487,6cyclictest1020037-21kworker/u8:0+flush-179:000:30:271
916471999485,6cyclictest1213033-21systemd-journal21:05:111
916468999487,5cyclictest1016189-21apt-get00:20:110
916471999384,6cyclictest929122-21kworker/u8:2+flush-179:020:25:171
916468999387,4cyclictest933333-21kworker/u8:1+flush-179:020:05:260
916471999081,7cyclictest969373-21kworker/u8:1+flush-179:022:15:221
916471998984,4cyclictest994925-21kworker/u8:0+events_unbound23:20:011
916468998978,8cyclictest1009553-21cupsd00:00:010
916468998777,8cyclictest1000203-21kworker/u8:1+flush-179:000:05:130
916471998674,9cyclictest1213033-21systemd-journal23:40:001
916468998475,6cyclictest1015921-21latency_hist00:20:010
916471998370,10cyclictest955063-21apt-get21:10:111
916468998274,5cyclictest933333-21kworker/u8:1+events_unbound20:00:240
916468998272,8cyclictest925899-21latency_hist19:40:000
916471998173,5cyclictest929122-21kworker/u8:2+flush-179:020:45:171
916468998175,4cyclictest1004534-21kworker/u8:0+flush-179:023:45:160
916468998174,5cyclictest929122-21kworker/u8:2+events_unbound20:40:240
916471998073,5cyclictest983747-21kworker/u8:1+flush-179:022:45:221
916471998070,7cyclictest1012726-21kworker/u8:0+flush-179:000:20:181
916471998064,14cyclictest929122-21kworker/u8:2+flush-179:020:30:161
916471998059,19cyclictest902122-21kworker/u8:3+flush-179:019:10:021
916468998065,12cyclictest1213033-21systemd-journal20:30:000
916471997969,7cyclictest1022282-21latency_hist00:40:001
916471997966,11cyclictest988526-21kworker/u8:3+events_unbound23:40:251
916468997972,5cyclictest966876-21kworker/u8:0+events_unbound21:55:240
916468997968,8cyclictest988526-21kworker/u8:3+flush-179:023:30:190
916468997968,8cyclictest988526-21kworker/u8:3+flush-179:023:30:190
916471997869,7cyclictest917941-21latency_hist19:15:011
916471997869,7cyclictest917941-21latency_hist19:15:001
916471997869,6cyclictest969373-21kworker/u8:1+events_unbound22:25:001
916468997868,8cyclictest1213033-21systemd-journal22:55:100
916471997771,4cyclictest924296-21kworker/u8:3+flush-179:019:55:111
916468997770,5cyclictest982427-21apt-get22:35:100
916468997769,6cyclictest953258-21kworker/u8:3+flush-179:021:45:170
916468997767,8cyclictest929122-21kworker/u8:2+events_unbound20:30:200
91646899770,75cyclictest2304-21lightdm-gtk-gre20:20:010
916471997670,4cyclictest961470-21kworker/u8:2+events_unbound21:50:141
916468997666,6cyclictest1-21systemd23:39:590
916471997565,8cyclictest940245-21apt-get20:25:001
916468997572,2cyclictest1000203-21kworker/u8:1+events_unbound23:50:220
916468997566,7cyclictest953258-21kworker/u8:3+flush-179:021:35:220
916468997467,4cyclictest945231-21kworker/u8:0+flush-179:021:05:010
916468997466,5cyclictest945262-21latency_hist20:40:010
916468997465,6cyclictest966876-21kworker/u8:0+events_unbound21:50:200
916468997464,7cyclictest914868-21kworker/u8:1+flush-179:019:25:200
916475997345,26cyclictest0-21swapper/322:53:593
916468997367,4cyclictest963022-21latency_hist21:35:010
916468997367,4cyclictest963022-21latency_hist21:35:010
916468997366,4cyclictest992725-21kworker/u8:0+flush-179:023:05:200
916471997265,5cyclictest914868-21kworker/u8:1+flush-179:019:40:191
916468997266,5cyclictest914868-21kworker/u8:1+events_unbound19:15:240
916471997166,4cyclictest914868-21kworker/u8:1+flush-179:019:15:151
916471997165,5cyclictest983747-21kworker/u8:1+flush-179:022:50:201
916471997165,4cyclictest971228-21kworker/u8:2+events_unbound22:00:251
916471997161,8cyclictest1006565-21apt-get23:50:111
916468997168,2cyclictest951593-21kworker/u8:2+events_unbound21:15:230
916471997065,4cyclictest953258-21kworker/u8:3+events_unbound21:20:241
916471997064,4cyclictest1000203-21kworker/u8:1+flush-179:023:45:251
916471997063,5cyclictest1009527-40mandb00:00:011
916471997060,7cyclictest1213033-21systemd-journal22:35:001
916468997063,6cyclictest945231-21kworker/u8:0+flush-179:020:50:220
916468997063,5cyclictest1017556-21kworker/u8:1+flush-179:000:25:190
916468997062,5cyclictest927740-21kworker/u8:0+flush-179:019:50:200
916471996962,5cyclictest1000203-21kworker/u8:1+flush-179:023:35:011
916471996962,5cyclictest1000203-21kworker/u8:1+flush-179:023:35:001
916468996963,5cyclictest994925-21kworker/u8:0+flush-179:023:15:130
916468996960,7cyclictest985366-21latency_hist22:45:010
916468996960,7cyclictest933333-21kworker/u8:1+flush-179:020:20:210
916468996958,9cyclictest980841-21apt-get22:30:110
916471996761,5cyclictest1012726-21kworker/u8:0+events_unbound00:10:251
916471996657,6cyclictest964627-21latency_hist21:40:011
916468996652,7cyclictest914868-21kworker/u8:1+events_unbound19:40:120
916471996554,5cyclictest914868-21kworker/u8:1+events_unbound19:25:221
916471996457,5cyclictest993319-21latency_hist23:10:001
916468996455,6cyclictest1213033-21systemd-journal19:12:060
916468996455,6cyclictest1213033-21systemd-journal19:12:060
916468996357,5cyclictest969373-21kworker/u8:1+flush-179:022:10:210
916468996357,5cyclictest924296-21kworker/u8:3+flush-179:019:45:220
916471996251,9cyclictest1213033-21systemd-journal20:56:101
916468996257,4cyclictest983747-21kworker/u8:1+events_unbound22:50:230
916468996255,5cyclictest922700-21kworker/u8:0+flush-179:019:30:140
916473996158,2cyclictest0-21swapper/221:15:002
916471996052,6cyclictest1010065-21kworker/u8:2+events_unbound00:00:231
916471995953,5cyclictest981620-21kworker/u8:0+events_unbound22:40:221
916471995952,5cyclictest969373-21kworker/u8:1+flush-179:022:05:211
916471995952,5cyclictest953258-21kworker/u8:3+events_unbound21:40:191
916468995952,5cyclictest924296-21kworker/u8:3+flush-179:019:55:150
916468995851,5cyclictest966212-21latency_hist21:45:010
916468995851,5cyclictest945231-21kworker/u8:0+flush-179:020:55:160
916475995726,1cyclictest0-21swapper/321:03:593
916471995750,5cyclictest929122-21kworker/u8:2+events_unbound20:35:141
916468995750,5cyclictest1020037-21kworker/u8:0+flush-179:000:35:180
916471995548,4cyclictest945231-21kworker/u8:0+events_unbound20:50:151
916471995449,4cyclictest933333-21kworker/u8:1+flush-179:020:00:251
916471995449,4cyclictest1007927-21kworker/u8:3+flush-179:000:15:251
916471995446,6cyclictest951593-21kworker/u8:2+events_unbound21:00:171
916471995444,8cyclictest988526-21kworker/u8:3+flush-179:023:05:001
916468995336,7cyclictest1000203-21kworker/u8:1+events_unbound23:45:010
916468995147,3cyclictest969373-21kworker/u8:1+flush-179:022:05:250
916468995145,5cyclictest988526-21kworker/u8:3+flush-179:023:25:030
916468995145,5cyclictest933333-21kworker/u8:1+flush-179:020:10:190
916471995045,4cyclictest983747-21kworker/u8:1+flush-179:022:55:151
916468995044,4cyclictest914868-21kworker/u8:1+flush-179:019:20:150
916475994947,1cyclictest0-21swapper/321:25:593
916475994845,1cyclictest0-21swapper/319:34:003
916475994842,5cyclictest998108-21turbostat23:25:003
916471994742,4cyclictest988526-21kworker/u8:3+events_unbound23:10:221
916471994742,4cyclictest988526-21kworker/u8:3+events_unbound23:10:221
916471994741,5cyclictest966876-21kworker/u8:0+events_unbound21:55:181
916468994742,4cyclictest969373-21kworker/u8:1+flush-179:022:24:110
4577091470,13ptp4l441ktimers/319:10:003
916468994237,4cyclictest945231-21kworker/u8:0+flush-179:020:45:250
916468994232,8cyclictest977340-21latency_hist22:20:010
91647599410,39cyclictest919538-21turbostat19:19:593
916475994033,5cyclictest930689-21turbostat19:55:003
916471994038,1cyclictest0-21swapper/121:25:591
91647599390,37cyclictest969398-21turbostat21:55:003
91647399380,35cyclictest0-21swapper/223:54:562
91647399380,35cyclictest0-21swapper/221:29:552
91647399380,35cyclictest0-21swapper/220:44:552
91647399380,35cyclictest0-21swapper/220:15:002
91647399380,35cyclictest0-21swapper/200:33:582
91647399380,2cyclictest0-21swapper/222:05:592
916475993734,2cyclictest0-21swapper/320:05:003
916475993634,1cyclictest0-21swapper/322:06:583
916475993634,1cyclictest0-21swapper/320:59:593
916475993633,2cyclictest0-21swapper/322:43:003
91647599360,35cyclictest0-21swapper/320:30:593
916473993633,2cyclictest0-21swapper/220:01:592
916473993633,2cyclictest0-21swapper/219:51:002
916475993533,1cyclictest0-21swapper/321:41:593
916475993533,1cyclictest0-21swapper/300:27:593
91647599350,34cyclictest0-21swapper/300:20:593
91647599350,1cyclictest0-21swapper/323:13:003
91647599350,1cyclictest0-21swapper/323:13:003
91647599350,1cyclictest0-21swapper/323:08:593
916473993527,7cyclictest0-21swapper/219:13:592
916473993527,7cyclictest0-21swapper/219:13:592
4577091350,3ptp4l61490irq/134-eno1-TxRx-023:15:123
916475993432,1cyclictest0-21swapper/322:24:563
916475993432,1cyclictest0-21swapper/321:59:593
916475993431,2cyclictest0-21swapper/322:34:593
91647399340,32cyclictest0-21swapper/221:45:592
91647399340,32cyclictest0-21swapper/221:05:002
91647399340,25cyclictest0-21swapper/223:59:552
916468993428,5cyclictest983747-21kworker/u8:1+flush-179:023:00:240
4577091340,3ptp4l441ktimers/319:20:123
91647399330,1cyclictest0-21swapper/223:45:162
916475993230,1cyclictest0-21swapper/322:49:593
916475993230,1cyclictest0-21swapper/319:36:593
91647399320,24cyclictest0-21swapper/220:08:592
4577091320,5ptp4l61490irq/134-eno1-TxRx-022:19:563
916475993128,2cyclictest0-21swapper/322:56:593
916475993128,2cyclictest0-21swapper/320:48:593
916475993127,2cyclictest0-21swapper/323:44:003
91647399310,29cyclictest0-21swapper/223:29:002
916475993028,2cyclictest0-21swapper/319:58:593
916475993028,1cyclictest0-21swapper/323:46:593
916475993028,1cyclictest0-21swapper/321:24:553
916475993027,2cyclictest0-21swapper/320:40:583
916475993027,2cyclictest0-21swapper/300:09:583
916475993024,5cyclictest1020704-21turbostat00:35:013
91647599300,29cyclictest0-21swapper/320:50:133
916473993027,2cyclictest0-21swapper/219:45:592
916473993018,9cyclictest0-21swapper/223:40:002
91647399300,2cyclictest0-21swapper/220:55:592
91647399300,27cyclictest0-21swapper/221:44:592
916475992927,1cyclictest0-21swapper/320:25:033
916475992927,1cyclictest0-21swapper/320:19:003
916475992926,2cyclictest0-21swapper/322:35:123
916473992926,2cyclictest0-21swapper/222:55:122
916473992926,2cyclictest0-21swapper/221:20:012
916473992922,5cyclictest0-21swapper/223:14:002
916473992922,5cyclictest0-21swapper/223:14:002
91647399290,27cyclictest0-21swapper/222:40:132
91647399290,27cyclictest0-21swapper/222:20:142
91647399290,27cyclictest0-21swapper/222:00:132
91647399290,27cyclictest0-21swapper/221:30:122
91647399290,27cyclictest0-21swapper/221:30:122
91647399290,27cyclictest0-21swapper/220:45:132
91647399290,27cyclictest0-21swapper/220:25:022
91647399290,21cyclictest0-21swapper/220:38:592
91647399290,1cyclictest0-21swapper/221:20:012
4577091290,7ptp4l61490irq/134-eno1-TxRx-021:10:013
4577091290,7ptp4l441ktimers/300:40:013
916475992826,1cyclictest0-21swapper/320:10:123
91647599280,2cyclictest0-21swapper/323:25:013
91647599280,2cyclictest0-21swapper/319:40:113
91647599280,27cyclictest0-21swapper/319:10:133
91647599280,27cyclictest0-21swapper/319:10:123
91647599280,26cyclictest0-21swapper/321:45:143
916473992826,1cyclictest0-21swapper/220:20:142
916473992825,2cyclictest0-21swapper/222:50:592
916473992825,2cyclictest0-21swapper/222:10:122
91647399280,26cyclictest0-21swapper/223:15:122
91647399280,26cyclictest0-21swapper/222:30:122
4577091280,8ptp4l441ktimers/323:05:013
4577091280,7ptp4l441ktimers/322:29:553
4577091280,7ptp4l441ktimers/321:35:013
4577091280,7ptp4l441ktimers/321:35:013
4577091280,6ptp4l441ktimers/319:50:013
4577091280,6ptp4l441ktimers/300:20:013
4577091280,6ptp4l441ktimers/300:05:013
916475992724,2cyclictest0-21swapper/321:16:593
916473992725,1cyclictest0-21swapper/222:40:002
916473992724,2cyclictest0-21swapper/223:05:132
91647399270,24cyclictest0-21swapper/221:37:592
91647399270,1cyclictest0-21swapper/222:18:592
91647399270,19cyclictest0-21swapper/219:33:002
4577091270,6ptp4l441ktimers/320:10:003
916473992623,2cyclictest0-21swapper/223:42:592
916473992623,2cyclictest0-21swapper/223:32:592
916473992623,2cyclictest0-21swapper/223:32:582
916473992623,2cyclictest0-21swapper/221:06:592
916473992623,2cyclictest0-21swapper/219:28:592
91647399260,24cyclictest0-21swapper/223:20:132
91647399260,24cyclictest0-21swapper/223:04:592
91647399260,24cyclictest0-21swapper/222:28:002
91647399260,24cyclictest0-21swapper/220:52:592
91647399260,24cyclictest0-21swapper/200:21:592
4577091260,6ptp4l441ktimers/300:15:013
4577091260,5ptp4l441ktimers/319:30:013
4577091260,5ptp4l441ktimers/300:00:013
916475992523,1cyclictest0-21swapper/323:51:583
916475992523,1cyclictest0-21swapper/321:36:593
916475992522,2cyclictest0-21swapper/320:35:593
916473992523,1cyclictest0-21swapper/200:38:592
916473992522,2cyclictest0-21swapper/221:57:592
91647399250,2cyclictest0-21swapper/219:44:542
91647399250,2cyclictest0-21swapper/219:25:002
4577091250,5ptp4l61490irq/134-eno1-TxRx-021:15:003
4577091250,5ptp4l441ktimers/323:34:563
4577091250,5ptp4l441ktimers/323:34:563
4577091250,5ptp4l441ktimers/322:04:563
4577091250,5ptp4l441ktimers/320:24:553
916475992422,1cyclictest0-21swapper/322:12:593
916473992422,1cyclictest0-21swapper/200:19:582
4577091240,4ptp4l61490irq/134-eno1-TxRx-023:39:553
916473992321,1cyclictest0-21swapper/219:56:582
916473992320,2cyclictest0-21swapper/200:13:592
916473992219,2cyclictest0-21swapper/221:50:592
91647399198,8cyclictest0-21swapper/200:10:012
916473991916,2cyclictest0-21swapper/200:25:122
91646899182,12cyclictest916328-21latency_hist19:10:010
916473991512,2cyclictest0-21swapper/219:18:002
916473991512,2cyclictest0-21swapper/200:03:592
91647399130,1cyclictest0-21swapper/222:50:012
91647399130,1cyclictest0-21swapper/220:35:002
91647399129,2cyclictest0-21swapper/220:15:592
91647399110,1cyclictest0-21swapper/219:39:562
9164739980,1cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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