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2026-08-25 - 06:27
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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 Tue Aug 25, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
84471099149135,9cyclictest1213033-21systemd-journal22:50:021
84471099144134,7cyclictest897889-21latency_hist21:55:011
84470699139131,6cyclictest920676-21kworker/u8:0+events_unbound23:05:000
84470699139129,7cyclictest864217-21latency_hist20:10:010
84470699135128,5cyclictest898038-21kworker/u8:2+events_unbound22:29:590
84471099132123,7cyclictest861077-21kworker/u8:0+flush-179:020:20:011
84470699132122,8cyclictest844567-21latency_hist19:10:020
84470699132122,7cyclictest1213033-21systemd-journal19:15:020
84470699132122,7cyclictest1213033-21systemd-journal19:15:010
84471099131121,7cyclictest899766-21latency_hist22:00:021
84471099131121,7cyclictest899766-21latency_hist22:00:021
84470699125114,6cyclictest920676-21kworker/u8:0+events_unbound23:10:020
84470699124114,6cyclictest909330-21kworker/u8:0+events_unbound22:40:010
84470699121110,8cyclictest843107-21kworker/u8:1+events_unbound19:30:020
84470699120105,6cyclictest923913-21kworker/u8:3+flush-179:023:20:240
844706991200,118cyclictest1-21systemd23:00:000
844706991200,118cyclictest1-21systemd21:40:000
84471099118107,7cyclictest854683-21latency_hist19:40:011
84471099116104,4cyclictest934238-21kworker/u8:0+events_unbound00:00:011
84471099115103,9cyclictest944663-21latency_hist00:30:011
84470699115108,5cyclictest947555-21kworker/u8:0+flush-179:000:40:000
84470699113101,8cyclictest873747-21kworker/u8:0+events_unbound21:05:200
8447069911099,7cyclictest898038-21kworker/u8:2+events_unbound22:50:200
84470699109100,6cyclictest847827-21kworker/u8:3+flush-179:019:20:150
8447069910897,7cyclictest923852-21kworker/u8:2+events_unbound23:25:190
84470699108103,4cyclictest935907-21kworker/u8:2+events_unbound00:04:000
8447069910798,6cyclictest923913-21kworker/u8:3+events_unbound23:35:040
8447069910798,6cyclictest923913-21kworker/u8:3+events_unbound23:35:030
8447069910793,11cyclictest851236-21apt-get19:30:000
8447069910699,5cyclictest873747-21kworker/u8:0+events_unbound21:20:010
8447109910591,11cyclictest1213033-21systemd-journal21:25:001
8447069910595,8cyclictest854938-21apt-get19:40:130
8447069910592,5cyclictest923913-21kworker/u8:3+events_unbound23:57:150
8447069910498,4cyclictest942860-21kworker/u8:1+flush-179:000:30:200
8447069910497,4cyclictest867369-21kworker/u8:1+events_unbound20:45:200
8447069910393,8cyclictest937750-21/usr/sbin/munin00:05:260
8447069910393,8cyclictest873747-21kworker/u8:0+flush-179:020:50:260
8447109910193,5cyclictest924833-21apt-get23:15:201
8447109910093,5cyclictest843107-21kworker/u8:1+flush-179:019:25:171
8447069910095,4cyclictest884887-21kworker/u8:3+flush-179:021:55:250
8447069910095,4cyclictest884887-21kworker/u8:3+flush-179:021:55:240
844706999995,3cyclictest843107-21kworker/u8:1+flush-179:019:35:240
844706999992,4cyclictest942860-21kworker/u8:1+flush-179:000:25:250
844706999893,4cyclictest922267-21kworker/u8:1+flush-179:023:15:250
844706999889,6cyclictest881711-21kworker/u8:1+events_unbound21:10:180
844706999889,6cyclictest881711-21kworker/u8:1+events_unbound21:10:170
844706999783,7cyclictest884887-21kworker/u8:3+events_unbound21:20:190
844706999690,4cyclictest873747-21kworker/u8:0+events_unbound21:25:100
844706999687,7cyclictest923913-21kworker/u8:3+flush-179:000:20:160
844706999687,6cyclictest909330-21kworker/u8:0+flush-179:022:40:150
844706999686,7cyclictest873767-21latency_hist20:40:010
844706999685,8cyclictest884887-21kworker/u8:3+events_unbound22:00:160
844710999586,7cyclictest930806-21apt-get23:35:231
844710999586,7cyclictest930806-21apt-get23:35:221
844710999586,7cyclictest918810-21kworker/u8:3+events_unbound23:00:001
844706999589,4cyclictest873747-21kworker/u8:0+events_unbound20:55:230
844710999484,8cyclictest1213033-21systemd-journal00:15:001
844706999481,10cyclictest1213033-21systemd-journal23:35:010
844710999384,6cyclictest857831-21kworker/u8:3+flush-179:019:55:001
844710999379,12cyclictest939111-21apt-get00:10:001
844710999281,9cyclictest894977-21apt-get21:45:151
844706999285,4cyclictest894755-21kworker/u8:1+events_unbound22:15:150
844706999280,9cyclictest894755-21kworker/u8:1+flush-179:021:50:230
844710999074,14cyclictest884887-21kworker/u8:3+events_unbound21:39:591
844706999086,3cyclictest867369-21kworker/u8:1+events_unbound20:40:240
844706999085,4cyclictest898038-21kworker/u8:2+flush-179:022:30:200
844706999083,5cyclictest912456-21kworker/u8:1+flush-179:022:45:120
844706998984,4cyclictest923913-21kworker/u8:3+events_unbound23:40:150
844706998980,4cyclictest888828-21kworker/u8:1+events_unbound21:30:260
844710998881,5cyclictest909552-21apt-get22:30:121
844710998781,4cyclictest906380-21apt-get22:20:121
844710998777,7cyclictest867952-21journal-offline20:20:151
844710998777,7cyclictest867952-21journal-offline20:20:141
844710998776,8cyclictest898038-21kworker/u8:2+events_unbound22:10:001
844710998773,12cyclictest893091-21kworker/u8:0+flush-179:021:45:001
844710998770,13cyclictest942816-21apt-get00:25:011
844710998677,7cyclictest1213033-21systemd-journal21:08:091
844710998662,22cyclictest1213033-21systemd-journal22:19:561
844706998579,4cyclictest867369-21kworker/u8:1+flush-179:020:25:210
844706998574,4cyclictest898038-21kworker/u8:2+events_unbound22:10:140
844706998478,4cyclictest861077-21kworker/u8:0+flush-179:020:00:200
844710998369,11cyclictest1213033-21systemd-journal00:20:011
844706998373,7cyclictest865802-21latency_hist20:15:010
844710998272,8cyclictest872427-21apt-get20:35:121
844710998267,11cyclictest946260-21apt-get00:35:001
844706998273,5cyclictest867369-21kworker/u8:1+flush-179:020:30:230
844710998168,10cyclictest1213033-21systemd-journal19:20:001
844710998066,11cyclictest1213033-21systemd-journal19:49:091
844706998074,4cyclictest898038-21kworker/u8:2+flush-179:022:20:230
844710997961,14cyclictest510-21rs:main1
844706997973,5cyclictest842509-21kworker/u8:0+flush-179:019:15:270
844706997873,4cyclictest923913-21kworker/u8:3+flush-179:000:10:160
844710997764,10cyclictest922542-21apt-get23:10:111
844706997769,7cyclictest923913-21kworker/u8:3+events_unbound23:55:000
844706997769,6cyclictest884887-21kworker/u8:3+events_unbound21:40:180
844710997666,6cyclictest876937-21kworker/u8:2+flush-179:021:00:151
844710997659,13cyclictest891272-21apt-get21:35:011
844706997469,3cyclictest857258-21kworker/u8:0+flush-179:019:45:210
844710997363,6cyclictest935907-21kworker/u8:2+events_unbound00:00:231
844706997368,4cyclictest861077-21kworker/u8:0+events_unbound20:20:240
844706997368,4cyclictest861077-21kworker/u8:0+events_unbound20:20:240
844706997267,4cyclictest898038-21kworker/u8:2+flush-179:022:05:280
844706997163,6cyclictest859459-21kworker/u8:1+events_unbound19:55:220
844710997057,9cyclictest510-21rs:main1
844706997066,3cyclictest857831-21kworker/u8:3+flush-179:019:50:200
844710996961,5cyclictest912456-21kworker/u8:1+events_unbound22:54:591
844710996948,18cyclictest854919-21kworker/u8:2+events_unbound19:40:171
844710996856,8cyclictest923913-21kworker/u8:3+events_unbound23:50:011
844710996761,4cyclictest880146-21latency_hist21:00:011
844710996756,8cyclictest1213033-21systemd-journal22:10:221
844706996761,5cyclictest884887-21kworker/u8:3+events_unbound21:45:250
844710996658,5cyclictest947555-21kworker/u8:0+events_unbound00:35:231
844710996559,5cyclictest900013-21apt-get22:00:121
844706996560,4cyclictest922267-21kworker/u8:1+flush-179:023:12:420
844710996452,9cyclictest1213033-21systemd-journal20:55:001
844710996237,22cyclictest934258-21latency_hist23:55:011
844710996155,4cyclictest867369-21kworker/u8:1+events_unbound20:25:251
844710996146,11cyclictest867369-21kworker/u8:1+flush-179:020:40:211
844706996152,7cyclictest881732-21latency_hist21:05:010
844710995954,4cyclictest898038-21kworker/u8:2+flush-179:022:25:261
844710995951,6cyclictest867369-21kworker/u8:1+events_unbound20:30:231
844710995945,8cyclictest843107-21kworker/u8:1+events_unbound19:30:101
844706995848,7cyclictest866081-21journal-offline20:15:150
844710995746,8cyclictest861077-21kworker/u8:0+events_unbound20:00:211
844706995752,4cyclictest941189-21kworker/u8:0+flush-179:000:19:590
844710995650,4cyclictest843107-21kworker/u8:1+flush-179:019:20:251
844710995349,2cyclictest888828-21kworker/u8:1+flush-179:021:25:191
844710995345,6cyclictest932394-21/usr/sbin/munin23:40:181
844710995142,7cyclictest862888-21apt-get20:05:121
844712995047,2cyclictest0-21swapper/221:11:592
844712995047,2cyclictest0-21swapper/221:11:592
844715994946,2cyclictest0-21swapper/323:55:593
844710994943,4cyclictest923852-21kworker/u8:2+events_unbound23:25:011
4577091490,13ptp4l441ktimers/319:09:553
844710994843,4cyclictest912506-21perf22:40:001
84471099482,43cyclictest930291-21latency_hist23:35:011
844710994738,7cyclictest928688-21kworker/u8:0+flush-179:023:30:001
844715994641,2cyclictest0-21swapper/320:30:593
844710994639,5cyclictest510-21rs:main1
84471299450,42cyclictest0-21swapper/223:45:002
844712994442,1cyclictest0-21swapper/219:44:592
844710994439,4cyclictest881711-21kworker/u8:1+events_unbound21:10:241
844710994439,4cyclictest881711-21kworker/u8:1+events_unbound21:10:231
84471299430,34cyclictest0-21swapper/220:36:592
844715994233,7cyclictest901356-21turbostat22:05:003
844715994139,1cyclictest0-21swapper/300:23:583
84471099410,37cyclictest0-21swapper/122:40:121
844715994034,4cyclictest904526-21turbostat22:15:003
844715994031,7cyclictest902941-21turbostat22:10:003
84471299400,38cyclictest0-21swapper/221:16:592
844710993933,5cyclictest859459-21kworker/u8:1+flush-179:020:10:251
844715993835,2cyclictest0-21swapper/320:54:553
84471299380,36cyclictest0-21swapper/223:23:582
84471299380,36cyclictest0-21swapper/222:58:002
84471299380,35cyclictest0-21swapper/221:30:592
84471299380,35cyclictest0-21swapper/219:26:592
844710993832,4cyclictest886518-21latency_hist21:20:011
844715993735,1cyclictest0-21swapper/323:14:563
84471599370,36cyclictest0-21swapper/323:32:593
84471599370,36cyclictest0-21swapper/300:03:593
84471599370,1cyclictest0-21swapper/320:59:553
844712993734,2cyclictest0-21swapper/221:01:002
844712993734,2cyclictest0-21swapper/219:18:592
844712993733,2cyclictest0-21swapper/220:32:582
84471299370,34cyclictest0-21swapper/222:45:012
84471299370,2cyclictest0-21swapper/222:22:592
844710993734,2cyclictest0-21swapper/119:14:591
844710993734,2cyclictest0-21swapper/119:14:591
844706993732,4cyclictest923913-21kworker/u8:3+events_unbound23:47:290
844715993634,1cyclictest0-21swapper/319:19:593
844715993633,2cyclictest0-21swapper/322:45:593
84471599360,35cyclictest0-21swapper/321:10:593
84471599360,35cyclictest0-21swapper/321:10:583
84471599360,35cyclictest0-21swapper/319:14:593
84471599360,35cyclictest0-21swapper/319:14:593
84471599360,1cyclictest0-21swapper/322:44:553
844712993633,2cyclictest0-21swapper/222:11:592
844712993633,2cyclictest0-21swapper/220:44:002
84471299360,1cyclictest0-21swapper/220:26:592
4577091360,7ptp4l61490irq/134-eno1-TxRx-019:55:013
844715993533,1cyclictest0-21swapper/323:38:593
844715993533,1cyclictest0-21swapper/323:38:583
844712993532,2cyclictest0-21swapper/222:32:592
844712993532,2cyclictest0-21swapper/221:45:592
844712993532,2cyclictest0-21swapper/220:18:592
844712993532,2cyclictest0-21swapper/219:32:592
84471299350,33cyclictest0-21swapper/200:25:012
84471299350,1cyclictest0-21swapper/200:24:582
844710993514,19cyclictest920957-21apt-get23:05:141
4577091350,12ptp4l441ktimers/322:29:593
844715993432,1cyclictest0-21swapper/321:24:553
844715993431,2cyclictest0-21swapper/321:51:593
844715993431,2cyclictest0-21swapper/319:44:003
844712993432,1cyclictest0-21swapper/220:54:592
84471299340,31cyclictest0-21swapper/223:35:012
844715993330,2cyclictest0-21swapper/322:35:593
844712993330,2cyclictest0-21swapper/219:20:592
84471299330,32cyclictest0-21swapper/219:10:132
84471299330,32cyclictest0-21swapper/219:10:132
844715993229,1cyclictest0-21swapper/322:19:563
84471599320,1cyclictest0-21swapper/322:50:133
844712993229,2cyclictest0-21swapper/223:52:582
844712993229,2cyclictest0-21swapper/223:02:002
844715993129,1cyclictest0-21swapper/300:09:583
84471599310,20cyclictest0-21swapper/319:25:143
844712993128,2cyclictest0-21swapper/222:28:002
844712993128,2cyclictest0-21swapper/220:02:592
84471299310,6cyclictest0-21swapper/200:05:592
844715993028,1cyclictest0-21swapper/321:02:583
844715993028,1cyclictest0-21swapper/319:35:593
844715993027,2cyclictest0-21swapper/300:10:153
84471599300,29cyclictest0-21swapper/321:33:593
84471599300,29cyclictest0-21swapper/300:25:033
84471599300,28cyclictest0-21swapper/321:35:033
84471599300,28cyclictest0-21swapper/300:35:023
84471599300,26cyclictest0-21swapper/321:40:133
844712993027,2cyclictest0-21swapper/223:58:592
844712993027,2cyclictest0-21swapper/222:50:122
844712993027,2cyclictest0-21swapper/222:49:552
844712993027,2cyclictest0-21swapper/220:20:132
844712993027,2cyclictest0-21swapper/220:20:132
84471299300,28cyclictest0-21swapper/223:35:592
84471299300,28cyclictest0-21swapper/223:35:592
84471299300,28cyclictest0-21swapper/219:55:152
4577091300,7ptp4l441ktimers/323:20:003
4577091300,7ptp4l441ktimers/321:50:013
844715992926,2cyclictest0-21swapper/320:20:133
844715992926,2cyclictest0-21swapper/320:20:133
84471599290,28cyclictest0-21swapper/319:55:153
84471599290,27cyclictest0-21swapper/320:40:143
84471599290,27cyclictest0-21swapper/319:30:023
844712992927,1cyclictest0-21swapper/200:14:592
844712992926,2cyclictest0-21swapper/222:00:592
844712992926,2cyclictest0-21swapper/220:45:142
84471299290,27cyclictest0-21swapper/221:55:032
84471299290,27cyclictest0-21swapper/221:55:022
84471299290,27cyclictest0-21swapper/221:35:032
84471299290,27cyclictest0-21swapper/219:51:592
4577091290,6ptp4l441ktimers/322:00:003
4577091290,6ptp4l441ktimers/322:00:003
4577091290,6ptp4l441ktimers/321:10:013
4577091290,6ptp4l441ktimers/320:40:013
4577091290,6ptp4l441ktimers/319:50:003
4577091290,6ptp4l441ktimers/300:35:003
844712992826,1cyclictest0-21swapper/223:14:592
844712992825,2cyclictest0-21swapper/222:36:582
84471299280,26cyclictest0-21swapper/221:20:592
84471299280,26cyclictest0-21swapper/200:35:022
4577091280,6ptp4l61490irq/134-eno1-TxRx-020:50:003
4577091280,6ptp4l441ktimers/320:10:003
4577091280,5ptp4l441ktimers/323:50:003
84471599270,26cyclictest0-21swapper/323:28:003
84471599270,1cyclictest0-21swapper/323:20:593
84471599270,1cyclictest0-21swapper/320:15:143
844712992725,1cyclictest0-21swapper/223:10:002
844712992724,2cyclictest0-21swapper/221:44:552
844712992724,2cyclictest0-21swapper/200:03:592
84471299270,25cyclictest0-21swapper/223:45:592
84471299270,25cyclictest0-21swapper/200:20:012
4577091270,6ptp4l441ktimers/323:00:013
4577091270,6ptp4l441ktimers/320:05:003
4577091270,5ptp4l441ktimers/323:55:003
4577091270,5ptp4l441ktimers/322:34:593
844715992624,1cyclictest0-21swapper/321:28:593
84471599260,24cyclictest0-21swapper/322:20:143
844712992619,6cyclictest0-21swapper/223:28:592
4577091260,5ptp4l441ktimers/323:44:563
4577091260,5ptp4l441ktimers/323:04:553
4577091260,5ptp4l441ktimers/320:15:003
4577091260,5ptp4l441ktimers/300:19:553
844712992523,1cyclictest0-21swapper/223:18:002
844712992523,1cyclictest0-21swapper/220:10:142
84471299250,24cyclictest0-21swapper/222:05:592
4577091250,5ptp4l61490irq/134-eno1-TxRx-021:19:553
844712992422,1cyclictest0-21swapper/221:50:122
844712992422,1cyclictest0-21swapper/221:25:592
844712992421,2cyclictest0-21swapper/220:59:552
84471299240,1cyclictest0-21swapper/219:40:002
4577091240,4ptp4l441ktimers/319:24:553
4577091240,3ptp4l61490irq/134-eno1-TxRx-020:29:593
844712992320,2cyclictest0-21swapper/220:09:552
844712992320,2cyclictest0-21swapper/200:31:002
844712992220,1cyclictest0-21swapper/219:50:002
844712992119,1cyclictest0-21swapper/221:08:582
844712992114,6cyclictest0-21swapper/222:18:592
844710991812,4cyclictest844567-21latency_hist19:10:031
4577091180,3ptp4l441ktimers/323:05:243
8447129980,7cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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