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2026-09-04 - 07:14
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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 Fri Sep 04, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
284291899149135,10cyclictest2933514-21latency_hist23:50:000
284292199147121,23cyclictest2950014-21latency_hist00:40:011
284292199146134,8cyclictest2842758-21latency_hist19:10:021
284291899141128,9cyclictest1213033-21systemd-journal23:55:010
284292199139133,4cyclictest2889230-21kworker/u8:1+events_unbound21:50:001
284292199139132,4cyclictest2924968-21kworker/u8:0+flush-179:023:50:271
284292199139126,11cyclictest2892956-21kworker/u8:2+events_unbound22:00:001
284292199136126,8cyclictest1213033-21systemd-journal23:20:001
284291899136125,8cyclictest2927148-21latency_hist23:30:010
284291899133115,13cyclictest2849152-21latency_hist19:30:010
284291899131117,10cyclictest2865875-21kworker/u8:1+flush-179:020:35:220
284292199129121,6cyclictest2889230-21kworker/u8:1+events_unbound22:55:021
284292199129115,5cyclictest2865875-21kworker/u8:1+flush-179:021:05:001
284292199128122,4cyclictest2847602-21kworker/u8:0+flush-179:020:05:251
284292199127122,4cyclictest2938551-21kworker/u8:2+events_unbound00:04:031
284292199127122,4cyclictest2938551-21kworker/u8:2+events_unbound00:04:021
284291899127115,8cyclictest2874911-21kworker/u8:3+flush-179:021:05:240
284292199125112,10cyclictest193509-21cups-browsed00:00:001
284292199125112,10cyclictest193509-21cups-browsed00:00:001
284291899125116,6cyclictest2865875-21kworker/u8:1+flush-179:020:30:010
284292199122117,4cyclictest2889230-21kworker/u8:1+events_unbound21:35:251
284292199122114,5cyclictest2922368-21latency_hist23:15:011
284292199122114,5cyclictest2845933-21kworker/u8:3+flush-179:019:40:261
284292199121115,4cyclictest2924968-21kworker/u8:0+flush-179:000:20:151
284292199121107,11cyclictest1213033-21systemd-journal23:05:001
284291899121110,8cyclictest2889230-21kworker/u8:1+flush-179:022:05:190
284291899121110,8cyclictest2889230-21kworker/u8:1+flush-179:022:05:190
284292199120114,4cyclictest2900942-21kworker/u8:3+events_unbound22:30:181
284292199120112,5cyclictest2919175-21kworker/u8:0+flush-179:023:05:231
284291899119107,8cyclictest2924968-21kworker/u8:0+events_unbound00:10:250
284292199118112,4cyclictest2886051-21kworker/u8:0+flush-179:021:25:281
284292199117109,5cyclictest2845933-21kworker/u8:3+flush-179:019:25:231
284292199117106,8cyclictest2892698-21latency_hist21:45:011
284291899117106,7cyclictest2900942-21kworker/u8:3+flush-179:022:35:000
284292199115106,6cyclictest2857352-21kworker/u8:1+flush-179:019:55:231
284292199115104,7cyclictest2910700-21kworker/u8:0+events_unbound22:40:221
284292199114105,6cyclictest2938551-21kworker/u8:2+events_unbound00:05:201
284291899114104,6cyclictest2865875-21kworker/u8:1+events_unbound20:59:590
284292199112105,5cyclictest2847602-21kworker/u8:0+flush-179:020:10:201
284292199112103,6cyclictest2879942-21kworker/u8:0+events_unbound21:10:211
284291899112104,5cyclictest2847602-21kworker/u8:0+events_unbound19:55:150
28429219911198,11cyclictest2924968-21kworker/u8:0+flush-179:023:45:161
28429219911093,11cyclictest2845933-21kworker/u8:3+events_unbound19:20:251
28429189911099,7cyclictest2889230-21kworker/u8:1+flush-179:022:25:200
284291899110106,3cyclictest2891081-21kworker/u8:0+flush-179:021:50:240
284291899110101,6cyclictest2919175-21kworker/u8:0+flush-179:023:05:120
284292199108101,5cyclictest2865875-21kworker/u8:1+events_unbound20:25:261
28429189910897,8cyclictest2846237-21apt-get19:20:120
28429219910799,5cyclictest2889230-21kworker/u8:1+events_unbound22:15:251
28429219910798,6cyclictest2924968-21kworker/u8:0+events_unbound00:15:251
284292199107100,5cyclictest2889230-21kworker/u8:1+flush-179:023:35:181
28429219910695,8cyclictest1213033-21systemd-journal21:20:011
28429219910694,10cyclictest1213033-21systemd-journal20:25:001
284292199106101,4cyclictest2847602-21kworker/u8:0+events_unbound20:45:231
284292199106100,4cyclictest2889230-21kworker/u8:1+flush-179:022:35:271
28429189910699,4cyclictest2920762-21kworker/u8:2+flush-179:023:20:210
28429219910596,6cyclictest2889230-21kworker/u8:1+events_unbound22:05:181
28429219910596,6cyclictest2889230-21kworker/u8:1+events_unbound22:05:171
28429219910497,5cyclictest2847602-21kworker/u8:0+events_unbound19:50:251
28429219910395,6cyclictest2900942-21kworker/u8:3+flush-179:022:30:001
28429219910395,5cyclictest2889247-21latency_hist21:35:011
28429219910394,6cyclictest2889230-21kworker/u8:1+events_unbound22:55:131
28429219910391,9cyclictest1213033-21systemd-journal20:40:001
28429189910396,4cyclictest2948676-21apt-get00:35:130
28429189910391,9cyclictest2889254-21apt-get21:35:030
28429219910297,4cyclictest2857352-21kworker/u8:1+events_unbound20:00:241
28429219910296,4cyclictest2863983-21apt-get20:15:121
28429219910195,4cyclictest2900942-21kworker/u8:3+flush-179:022:10:251
28429219910190,8cyclictest2879962-21apt-get21:05:101
28429189910188,9cyclictest2900942-21kworker/u8:3+events_unbound22:50:000
28429189910092,5cyclictest2935394-21kworker/u8:3+flush-179:023:55:250
28429189910092,5cyclictest2935394-21kworker/u8:3+flush-179:023:55:250
28429189910089,6cyclictest2886107-21kworker/u8:2+events_unbound21:30:310
2842921999995,3cyclictest2865875-21kworker/u8:1+flush-179:020:55:211
2842921999885,4cyclictest2889230-21kworker/u8:1+events_unbound23:45:011
2842921999885,4cyclictest2889230-21kworker/u8:1+events_unbound23:45:011
2842921999788,7cyclictest2836960-21kworker/u8:0+flush-179:019:10:211
2842918999688,5cyclictest2889230-21kworker/u8:1+flush-179:023:35:180
2842918999679,13cyclictest1213033-21systemd-journal00:35:000
2842921999587,6cyclictest2865875-21kworker/u8:1+flush-179:021:24:591
2842921999587,5cyclictest2900942-21kworker/u8:3+events_unbound22:45:151
2842918999581,8cyclictest2924968-21kworker/u8:0+flush-179:000:15:230
2842921999487,4cyclictest2904074-21kworker/u8:2+events_unbound22:20:141
2842921999484,7cyclictest2845978-21latency_hist19:20:011
2842918999478,5cyclictest2902728-21kworker/u8:0+flush-179:022:15:220
2842921999386,5cyclictest2889230-21kworker/u8:1+events_unbound22:00:211
2842918999382,7cyclictest2886051-21kworker/u8:0+flush-179:021:25:230
2842918999381,8cyclictest2847602-21kworker/u8:0+flush-179:019:35:200
2842918999379,10cyclictest2938614-21latency_hist00:05:020
2842918999379,10cyclictest2938614-21latency_hist00:05:010
2842918999278,9cyclictest1213033-21systemd-journal22:05:000
2842921999182,6cyclictest2942801-21kworker/u8:1+events_unbound00:25:201
2842918999184,5cyclictest2865875-21kworker/u8:1+flush-179:021:20:170
2842918999182,6cyclictest2938551-21kworker/u8:2+flush-179:000:05:220
2842918999086,2cyclictest2873291-21latency_hist20:45:010
2842921998982,5cyclictest2924968-21kworker/u8:0+flush-179:023:25:201
2842921998882,5cyclictest2847602-21kworker/u8:0+flush-179:019:30:201
2842918998881,4cyclictest2847602-21kworker/u8:0+flush-179:019:45:170
2842918998879,6cyclictest2851000-21latency_hist19:35:010
2842921998781,4cyclictest2891081-21kworker/u8:0+flush-179:021:50:221
2842921998779,5cyclictest2847602-21kworker/u8:0+flush-179:019:35:191
2842918998673,10cyclictest2904358-21apt-get22:20:120
2842921998580,4cyclictest2865875-21kworker/u8:1+events_unbound20:50:181
2842921998378,4cyclictest2924968-21kworker/u8:0+events_unbound00:10:241
2842918998379,3cyclictest2900942-21kworker/u8:3+flush-179:022:10:230
2842918998374,6cyclictest2900942-21kworker/u8:3+flush-179:022:35:220
2842921998274,5cyclictest2946805-21kworker/u8:0+flush-179:000:30:221
2842918998273,5cyclictest2857352-21kworker/u8:1+flush-179:019:55:000
2842918998071,6cyclictest2866923-21latency_hist20:25:010
2842918997972,5cyclictest2924968-21kworker/u8:0+flush-179:000:20:160
2842918997970,6cyclictest2879942-21kworker/u8:0+flush-179:021:10:170
2842918997867,7cyclictest2917865-21apt-get23:00:120
2842918997769,6cyclictest2889230-21kworker/u8:1+events_unbound21:45:190
2842918997670,4cyclictest2889230-21kworker/u8:1+flush-179:023:00:010
2842921997571,3cyclictest2865875-21kworker/u8:1+flush-179:020:30:251
2842918997567,5cyclictest2874911-21kworker/u8:3+events_unbound21:15:240
2842918997467,5cyclictest2924968-21kworker/u8:0+flush-179:023:30:280
2842918997265,5cyclictest2857352-21kworker/u8:1+events_unbound20:00:140
2842918997263,6cyclictest2924968-21kworker/u8:0+events_unbound23:40:150
2842918997263,6cyclictest2924968-21kworker/u8:0+events_unbound23:40:140
2842918997161,6cyclictest2874876-21latency_hist20:50:010
2842918997158,10cyclictest1213033-21systemd-journal20:20:000
2842918997063,5cyclictest2854102-21kworker/u8:1+flush-179:019:40:270
2842921996965,3cyclictest2889230-21kworker/u8:1+flush-179:023:20:271
2842918996962,5cyclictest2924008-21true23:20:000
2842918996958,7cyclictest2836960-21kworker/u8:0+flush-179:019:10:230
2842918996862,4cyclictest2844627-21apt-get19:15:110
2842918996760,5cyclictest2874911-21kworker/u8:3+flush-179:021:00:150
2842921996661,4cyclictest2865875-21kworker/u8:1+flush-179:020:40:261
2842918996558,5cyclictest2865875-21kworker/u8:1+flush-179:020:30:150
2842918996457,4cyclictest2889230-21kworker/u8:1+events_unbound21:55:150
2842918996455,6cyclictest2900942-21kworker/u8:3+events_unbound22:50:290
2842918996451,10cyclictest1213033-21systemd-journal22:45:010
2842921996352,8cyclictest2928736-21latency_hist23:35:011
2842918996356,5cyclictest2847602-21kworker/u8:0+events_unbound20:10:210
2842918996054,5cyclictest2865875-21kworker/u8:1+flush-179:020:50:210
2842918996053,4cyclictest2891081-21kworker/u8:0+flush-179:021:40:260
2842918995954,4cyclictest2889230-21kworker/u8:1+events_unbound23:15:010
2842918995953,5cyclictest2942801-21kworker/u8:1+flush-179:000:25:210
2842921995753,3cyclictest2847602-21kworker/u8:0+flush-179:019:45:271
4577091500,14ptp4l441ktimers/319:10:003
2842918994840,6cyclictest2847602-21kworker/u8:0+events_unbound20:05:220
284292299460,35cyclictest0-21swapper/223:30:002
2842922994542,2cyclictest0-21swapper/221:05:592
2842925994240,1cyclictest0-21swapper/320:23:593
2842922994032,7cyclictest0-21swapper/223:05:582
284292299390,36cyclictest0-21swapper/222:24:542
284292299390,36cyclictest0-21swapper/219:19:552
2842925993836,1cyclictest0-21swapper/300:18:003
284292299380,35cyclictest0-21swapper/221:40:012
2842925993734,2cyclictest0-21swapper/319:59:593
2842925993731,5cyclictest2874881-21turbostat20:50:003
284292599370,36cyclictest0-21swapper/320:10:593
284292599370,36cyclictest0-21swapper/300:32:593
284292299370,35cyclictest0-21swapper/221:50:582
284292299370,2cyclictest0-21swapper/223:51:592
284292299370,1cyclictest0-21swapper/221:47:592
2842925993631,4cyclictest2902509-21turbostat22:14:593
284292599360,35cyclictest0-21swapper/321:03:593
284292299360,1cyclictest0-21swapper/221:25:002
4577091350,3ptp4l441ktimers/323:30:173
2842925993534,1cyclictest0-21swapper/300:12:593
2842925993532,1cyclictest0-21swapper/320:06:593
2842925993529,4cyclictest2917595-21turbostat23:04:543
284292599350,1cyclictest0-21swapper/319:17:003
2842922993532,2cyclictest0-21swapper/220:40:002
284292299350,1cyclictest0-21swapper/222:30:012
2842922993431,2cyclictest0-21swapper/219:56:592
2842922993431,2cyclictest0-21swapper/219:43:592
284292299340,2cyclictest0-21swapper/223:20:132
2842925993327,5cyclictest2868524-21turbostat20:30:013
2842922993330,2cyclictest0-21swapper/222:03:002
2842922993330,2cyclictest0-21swapper/219:49:552
284292299330,26cyclictest0-21swapper/222:05:162
284292299330,26cyclictest0-21swapper/222:05:152
2842925993230,1cyclictest0-21swapper/320:39:593
2842925993223,7cyclictest2892713-21turbostat21:45:013
2842922993229,2cyclictest0-21swapper/219:25:592
2842922993225,6cyclictest0-21swapper/223:14:592
4577091310,6ptp4l61490irq/134-eno1-TxRx-019:54:553
2842925993129,1cyclictest0-21swapper/322:34:583
2842925993129,1cyclictest0-21swapper/322:15:593
2842925993129,1cyclictest0-21swapper/321:14:543
2842925993128,2cyclictest0-21swapper/322:59:003
2842925993125,5cyclictest2852605-21turbostat19:40:003
2842922993128,2cyclictest0-21swapper/220:44:002
2842922993125,5cyclictest0-21swapper/220:45:132
2842922993125,5cyclictest0-21swapper/200:05:022
284292299310,30cyclictest0-21swapper/220:50:132
4577091300,7ptp4l441ktimers/319:25:003
4577091300,7ptp4l441ktimers/300:25:003
2842925993027,2cyclictest0-21swapper/320:00:133
2842925993024,5cyclictest2920799-21turbostat23:10:003
284292599300,28cyclictest0-21swapper/322:50:033
284292599300,28cyclictest0-21swapper/319:30:033
2842922993027,2cyclictest0-21swapper/221:01:582
2842922993027,2cyclictest0-21swapper/219:30:022
2842922993027,2cyclictest0-21swapper/200:25:122
284292299300,29cyclictest0-21swapper/220:00:132
284292299300,28cyclictest0-21swapper/222:50:172
284292299300,28cyclictest0-21swapper/200:15:132
231999300,9rtkit-daemon495-21gpm19:08:430
4577091290,7ptp4l61490irq/134-eno1-TxRx-020:45:013
4577091290,7ptp4l441ktimers/323:25:003
4577091290,7ptp4l441ktimers/321:35:013
4577091290,6ptp4l441ktimers/323:30:013
4577091290,6ptp4l441ktimers/322:30:003
4577091290,6ptp4l441ktimers/322:05:003
4577091290,6ptp4l441ktimers/321:49:593
4577091290,6ptp4l441ktimers/300:40:003
2842925992927,1cyclictest0-21swapper/323:14:003
2842925992927,1cyclictest0-21swapper/321:09:593
2842925992927,1cyclictest0-21swapper/319:29:593
2842925992927,1cyclictest0-21swapper/300:05:023
2842925992926,2cyclictest0-21swapper/320:31:593
2842925992925,2cyclictest0-21swapper/323:35:143
2842925992922,5cyclictest2938629-21turbostat00:05:013
2842925992922,5cyclictest2938629-21turbostat00:05:003
284292599290,28cyclictest0-21swapper/320:15:593
284292599290,28cyclictest0-21swapper/300:25:123
284292599290,27cyclictest0-21swapper/322:05:163
284292599290,27cyclictest0-21swapper/322:05:163
284292599290,27cyclictest0-21swapper/321:15:133
2842922992926,2cyclictest0-21swapper/223:35:142
2842922992926,2cyclictest0-21swapper/223:04:002
2842922992926,2cyclictest0-21swapper/200:05:012
2842922992926,2cyclictest0-21swapper/200:05:012
2842922992925,3cyclictest0-21swapper/221:10:142
2842922992922,6cyclictest0-21swapper/221:43:002
284292299290,27cyclictest0-21swapper/220:20:132
4577091280,7ptp4l441ktimers/321:40:013
4577091280,6ptp4l441ktimers/322:50:003
4577091280,6ptp4l441ktimers/321:25:003
4577091280,6ptp4l441ktimers/300:00:003
4577091280,6ptp4l441ktimers/300:00:003
284292599280,26cyclictest0-21swapper/323:15:133
284292599280,26cyclictest0-21swapper/322:20:143
2842922992825,2cyclictest0-21swapper/223:15:142
2842922992825,2cyclictest0-21swapper/222:57:002
2842922992825,2cyclictest0-21swapper/222:45:132
2842922992825,2cyclictest0-21swapper/221:30:592
2842922992825,2cyclictest0-21swapper/219:52:592
2842922992825,2cyclictest0-21swapper/219:23:002
284292299280,2cyclictest0-21swapper/222:30:162
284292299280,2cyclictest0-21swapper/221:15:122
284292299280,26cyclictest0-21swapper/222:35:132
284292299280,26cyclictest0-21swapper/200:30:152
284292299280,26cyclictest0-21swapper/200:20:122
4577091270,5ptp4l441ktimers/321:29:543
4577091270,5ptp4l441ktimers/319:15:013
2842925992725,1cyclictest0-21swapper/322:42:003
2842925992725,1cyclictest0-21swapper/320:55:123
2842925992721,4cyclictest2855795-21turbostat19:50:003
284292599270,26cyclictest0-21swapper/319:40:133
284292599270,1cyclictest0-21swapper/323:50:163
2842922992720,6cyclictest0-21swapper/221:29:002
284292299270,1cyclictest0-21swapper/222:40:032
4577091260,5ptp4l61490irq/134-eno1-TxRx-021:59:553
4577091260,5ptp4l441ktimers/323:49:563
2842922992623,2cyclictest0-21swapper/200:12:592
4577091250,4ptp4l441ktimers/320:54:563
284292599250,24cyclictest0-21swapper/323:42:003
284292599250,24cyclictest0-21swapper/323:41:593
284292599250,1cyclictest0-21swapper/321:54:553
2842922992522,2cyclictest0-21swapper/219:10:592
284292299250,2cyclictest0-21swapper/220:05:152
284292299250,24cyclictest0-21swapper/200:37:592
284292299250,18cyclictest0-21swapper/223:55:142
284292299250,18cyclictest0-21swapper/223:55:142
2842922992422,1cyclictest0-21swapper/222:13:002
2842922992422,1cyclictest0-21swapper/219:35:592
4577091230,2ptp4l441ktimers/322:39:553
2842922992320,2cyclictest0-21swapper/220:10:592
2842922992219,2cyclictest0-21swapper/223:45:592
2842922992118,2cyclictest0-21swapper/222:15:592
2842922991714,2cyclictest0-21swapper/220:55:132
2842922991512,2cyclictest0-21swapper/220:31:592
2842922991311,1cyclictest0-21swapper/220:15:592
2842922991310,2cyclictest0-21swapper/223:44:002
2842922991310,2cyclictest0-21swapper/223:43:592
284292299119,1cyclictest0-21swapper/223:35:002
284292299119,1cyclictest0-21swapper/221:56:592
284292299107,2cyclictest0-21swapper/220:30:012
28429229930,2cyclictest0-21swapper/219:10:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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