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2026-08-03 - 05:18
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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 Mon Aug 03, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
417968499146135,9cyclictest93217-21apt-get00:40:010
417968799140133,5cyclictest50947-21kworker/u8:0+flush-179:022:35:011
417968499135124,8cyclictest65555-21latency_hist23:15:020
417968799129119,7cyclictest18093-21apt-get20:50:001
417968499124112,9cyclictest34531-21latency_hist21:40:010
417968499124111,10cyclictest1213033-21systemd-journal00:30:010
417968799122115,5cyclictest36155-21kworker/u8:2+flush-179:022:25:011
417968799121113,6cyclictest41138-21kworker/u8:1+flush-179:022:10:011
417968799121108,11cyclictest4184359-21latency_hist19:25:011
417968799121108,11cyclictest4184359-21latency_hist19:25:011
417968799120115,4cyclictest29725-21kworker/u8:0+flush-179:021:30:001
417968799119112,6cyclictest78588-21kworker/u8:3+flush-179:000:20:011
417968799119111,6cyclictest10356-21kworker/u8:0+flush-179:021:15:151
417968799119111,6cyclictest10356-21kworker/u8:0+flush-179:021:15:151
417968799116100,15cyclictest18059-21kworker/u8:1+flush-179:021:00:251
417968499115108,5cyclictest24944-21kworker/u8:2+flush-179:021:10:240
417968499115108,5cyclictest24944-21kworker/u8:2+flush-179:021:10:240
4179684991150,111cyclictest1-21systemd23:35:010
417968799114103,8cyclictest4187768-21kworker/u8:1+events_unbound20:20:001
417968799113105,5cyclictest4194201-21kworker/u8:2+events_unbound20:00:011
417968499113101,9cyclictest80178-40mandb00:00:020
417968499113101,9cyclictest1213033-21systemd-journal00:25:010
417968799112106,4cyclictest4190451-21kworker/u8:0+events_unbound19:50:001
41796879910997,8cyclictest4179536-21kworker/u8:1+flush-179:019:10:271
41796879910993,6cyclictest78588-21kworker/u8:3+events_unbound00:09:591
41796849910796,8cyclictest4186205-21latency_hist19:30:000
41796849910796,8cyclictest4186205-21latency_hist19:30:000
41796879910690,7cyclictest58312-21kworker/u8:0+flush-179:022:55:011
417968799106100,4cyclictest71959-21kworker/u8:0+flush-179:023:55:151
41796849910696,7cyclictest37707-21latency_hist21:50:010
41796849910496,6cyclictest62636-21apt-get23:05:110
41796879910395,5cyclictest71959-21kworker/u8:0+flush-179:023:35:231
41796849910297,3cyclictest36155-21kworker/u8:2+flush-179:021:50:240
41796849910293,6cyclictest42489-21latency_hist22:05:020
41796879910193,5cyclictest4187779-21kworker/u8:3+events_unbound19:35:231
41796879910191,6cyclictest66595-21kworker/u8:4+flush-179:023:15:261
4179687999989,8cyclictest36155-21kworker/u8:2+flush-179:022:40:001
4179687999988,8cyclictest13271-21kworker/u8:3+flush-179:020:40:261
4179687999789,5cyclictest78588-21kworker/u8:3+events_unbound00:25:251
4179684999788,6cyclictest82069-21latency_hist00:05:020
4179687999689,4cyclictest29725-21kworker/u8:0+events_unbound21:45:211
4179687999686,8cyclictest4190451-21kworker/u8:0+flush-179:019:40:221
4179687999686,7cyclictest55479-21kworker/u8:1+events_unbound22:55:261
4179687999589,5cyclictest55479-21kworker/u8:1+flush-179:022:44:551
4179684999581,11cyclictest1213033-21systemd-journal22:50:000
4179684999579,13cyclictest55493-21latency_hist22:45:010
4179687999486,5cyclictest24944-21kworker/u8:2+flush-179:021:20:141
4179687999485,7cyclictest12333-21kworker/u8:2+events_unbound20:30:251
4179687999485,6cyclictest86896-21kworker/u8:2+flush-179:000:30:271
4179687999383,7cyclictest36155-21kworker/u8:2+flush-179:021:50:191
4179684999385,5cyclictest4187794-21latency_hist19:35:020
4179687999284,5cyclictest4187768-21kworker/u8:1+flush-179:020:35:211
4179687999278,11cyclictest1213033-21systemd-journal23:10:011
4179687999185,4cyclictest65544-21kworker/u8:1+flush-179:023:40:201
4179687999085,3cyclictest71959-21kworker/u8:0+flush-179:023:50:211
4179687999079,7cyclictest4179624-21kworker/u8:2+flush-179:019:25:221
4179687999079,7cyclictest4179624-21kworker/u8:2+flush-179:019:25:211
4179684999084,4cyclictest4194201-21kworker/u8:2+flush-179:020:00:250
4179687998981,6cyclictest29725-21kworker/u8:0+events_unbound21:40:011
4179687998980,7cyclictest78588-21kworker/u8:3+flush-179:000:00:271
4179687998881,6cyclictest4187768-21kworker/u8:1+flush-179:019:55:001
4179687998781,4cyclictest10356-21kworker/u8:0+flush-179:020:25:181
4179687998675,9cyclictest39548-21apt-get21:55:131
4179684998681,3cyclictest10356-21kworker/u8:0+events_unbound20:45:000
4179684998676,7cyclictest4183027-21apt-get19:20:110
4179684998676,7cyclictest4183027-21apt-get19:20:110
4179687998581,3cyclictest36155-21kworker/u8:2+flush-179:022:05:011
4179687998479,4cyclictest4179624-21kworker/u8:2+flush-179:019:30:241
4179687998476,5cyclictest66595-21kworker/u8:4+events_unbound23:30:141
4179684998472,8cyclictest86896-21kworker/u8:2+flush-179:000:30:160
4179687998372,9cyclictest58979-21kworker/u8:2+events_unbound23:00:201
4179687998275,4cyclictest58312-21kworker/u8:0+flush-179:023:10:211
4179687998273,7cyclictest91078-21kworker/u8:0+events_unbound00:40:001
4179684998271,8cyclictest21529-21latency_hist21:00:010
4179687998176,3cyclictest10356-21kworker/u8:0+flush-179:021:05:201
4179687998174,5cyclictest78588-21kworker/u8:3+events_unbound00:20:221
4179687998171,8cyclictest55479-21kworker/u8:1+flush-179:022:45:211
4179684998168,9cyclictest71959-21kworker/u8:0+flush-179:000:10:230
4179684998072,6cyclictest13551-21apt-get20:35:120
4179684998065,8cyclictest27546-21kworker/u8:1+events_unbound21:20:010
4179684998065,8cyclictest27546-21kworker/u8:1+events_unbound21:20:000
4179687997973,4cyclictest65544-21kworker/u8:1+events_unbound23:50:001
4179687997972,5cyclictest18059-21kworker/u8:1+events_unbound20:55:151
4179687997969,8cyclictest49379-21apt-get22:25:121
4179684997972,5cyclictest4194201-21kworker/u8:2+events_unbound20:25:010
4179684997968,8cyclictest47776-21/usr/sbin/munin22:20:240
4179684997867,8cyclictest4181163-21latency_hist19:15:010
4179684997765,9cyclictest71959-21kworker/u8:0+events_unbound23:44:590
4179687997666,4cyclictest4194201-21kworker/u8:2+events_unbound20:00:231
4179687997570,4cyclictest66595-21kworker/u8:4+flush-179:023:20:251
4179684997563,10cyclictest4193086-21apt-get19:50:110
4179687997467,5cyclictest42537-21kworker/u8:3+events_unbound22:10:131
4179684997467,5cyclictest29725-21kworker/u8:0+flush-179:021:40:200
4179684997467,5cyclictest29725-21kworker/u8:0+flush-179:021:40:190
4179684997369,3cyclictest71959-21kworker/u8:0+flush-179:000:05:240
4179684997360,10cyclictest1213033-21systemd-journal21:59:590
4179687997264,6cyclictest36155-21kworker/u8:2+flush-179:022:20:011
4179687997166,4cyclictest4194201-21kworker/u8:2+flush-179:020:24:551
4179684997161,7cyclictest6924-21latency_hist20:15:010
4179684997161,7cyclictest6924-21latency_hist20:15:010
4179684996855,9cyclictest1213033-21systemd-journal20:50:000
4179684996758,7cyclictest29725-21kworker/u8:0+flush-179:021:35:010
4179684996757,7cyclictest47261-21latency_hist22:20:000
4179684996753,10cyclictest1213033-21systemd-journal20:35:000
4179684996653,10cyclictest76724-21apt-get23:50:000
4179687996557,6cyclictest83910-21apt-get00:10:101
4179684996555,7cyclictest51253-21diskstats22:30:150
4179684996554,9cyclictest44331-21apt-get22:10:110
4179687996357,4cyclictest29725-21kworker/u8:0+events_unbound21:40:251
4179687996357,4cyclictest29725-21kworker/u8:0+events_unbound21:40:241
4179684996348,8cyclictest10356-21kworker/u8:0+flush-179:020:25:150
4179687996257,4cyclictest66595-21kworker/u8:4+events_unbound23:25:251
4179687996257,4cyclictest29725-21kworker/u8:0+flush-179:021:30:251
4179687996257,4cyclictest10356-21kworker/u8:0+flush-179:020:50:211
4179684996252,7cyclictest10356-21kworker/u8:0+events_unbound20:50:030
4179688996158,2cyclictest0-21swapper/222:10:592
4179687996155,4cyclictest4179536-21kworker/u8:1+events_unbound19:15:241
4179691996058,1cyclictest0-21swapper/322:02:003
4179691996058,1cyclictest0-21swapper/320:14:593
4179691996058,1cyclictest0-21swapper/320:14:593
4179691996058,1cyclictest0-21swapper/320:02:593
4179687996053,5cyclictest24944-21kworker/u8:2+events_unbound21:15:011
4179687996053,5cyclictest24944-21kworker/u8:2+events_unbound21:15:001
4179684996054,4cyclictest712-21apt-get19:55:130
4179684996051,7cyclictest66595-21kworker/u8:4+flush-179:023:20:220
4179684996050,8cyclictest1213033-21systemd-journal23:54:540
4179684995949,8cyclictest66595-21kworker/u8:4+flush-179:023:25:220
4179691995856,1cyclictest0-21swapper/321:57:593
4179684995848,7cyclictest7179-21apt-get20:15:110
4179684995651,4cyclictest0-21swapper/022:07:590
4179684995647,6cyclictest71959-21kworker/u8:0+flush-179:000:15:150
4179691995553,1cyclictest0-21swapper/321:31:003
4179691995552,2cyclictest0-21swapper/300:02:593
4179688995552,2cyclictest0-21swapper/223:58:592
4179687995544,7cyclictest4194201-21kworker/u8:2+events_unbound20:05:131
4179691995452,1cyclictest0-21swapper/300:30:593
4179687995450,3cyclictest4187768-21kworker/u8:1+flush-179:020:10:211
4179687995450,3cyclictest4187768-21kworker/u8:1+flush-179:020:10:211
4179684995447,5cyclictest36155-21kworker/u8:2+flush-179:022:30:010
4179684995347,4cyclictest5321-21sh20:10:010
4179688995149,1cyclictest0-21swapper/220:34:592
4179688995148,2cyclictest0-21swapper/223:48:592
4179684995145,4cyclictest4187779-21kworker/u8:3+flush-179:019:40:130
4179684995144,6cyclictest52311-21turbostat22:39:550
4577091480,13ptp4l61490irq/134-eno1-TxRx-019:10:023
4179684994839,6cyclictest58979-21kworker/u8:2+flush-179:023:15:220
417968499482,44cyclictest24722-21perf21:10:000
4179691994745,1cyclictest0-21swapper/323:47:003
4179684994741,3cyclictest59328-21cat22:55:020
4179684994739,6cyclictest10356-21kworker/u8:0+flush-179:021:00:150
4179684994735,9cyclictest1213033-21systemd-journal23:40:000
4179684994638,6cyclictest4181418-21apt-get19:15:120
4179691994538,5cyclictest4191256-21turbostat19:45:003
4179684994538,6cyclictest0-21swapper/021:25:170
4179684994533,10cyclictest28418-21apt-get21:20:110
4179684994439,4cyclictest59373-21cat22:55:020
4179684994339,2cyclictest714-21Xorg19:37:590
4179684994332,8cyclictest1213033-21systemd-journal23:00:590
4179691994139,1cyclictest0-21swapper/321:25:593
4179688994037,2cyclictest0-21swapper/221:02:592
4179684994034,4cyclictest4187768-21kworker/u8:1+flush-179:019:45:160
417968899380,35cyclictest0-21swapper/222:08:592
417968899380,35cyclictest0-21swapper/200:00:592
4577091370,5ptp4l431rcuc/322:55:003
4179691993735,1cyclictest0-21swapper/323:16:003
4179691993735,1cyclictest0-21swapper/322:55:593
4179691993735,1cyclictest0-21swapper/321:06:583
4179688993734,2cyclictest0-21swapper/222:58:592
4179688993734,2cyclictest0-21swapper/220:25:592
4179688993734,2cyclictest0-21swapper/200:22:592
417968899370,35cyclictest0-21swapper/221:59:002
417968899370,35cyclictest0-21swapper/220:56:592
417968899370,2cyclictest0-21swapper/222:46:002
4179691993634,1cyclictest0-21swapper/322:09:563
417969199360,35cyclictest0-21swapper/319:35:003
417969199360,35cyclictest0-21swapper/300:12:593
417969199360,1cyclictest0-21swapper/323:56:583
4179688993633,2cyclictest0-21swapper/222:25:592
4179688993633,2cyclictest0-21swapper/222:21:582
4179688993633,2cyclictest0-21swapper/219:43:582
4179691993533,1cyclictest0-21swapper/322:44:003
417969199350,1cyclictest0-21swapper/323:42:593
4179688993533,1cyclictest0-21swapper/220:49:592
4179688993532,2cyclictest0-21swapper/223:04:002
417968899350,1cyclictest0-21swapper/223:14:592
417968899350,1cyclictest0-21swapper/221:40:592
417968899350,1cyclictest0-21swapper/221:40:592
417968899350,1cyclictest0-21swapper/220:18:592
4179691993427,5cyclictest70346-21turbostat23:34:563
4179688993431,2cyclictest0-21swapper/219:52:592
4179691993331,1cyclictest0-21swapper/320:09:553
4179688993330,2cyclictest0-21swapper/222:02:582
4179688993330,2cyclictest0-21swapper/221:47:582
4179688993330,2cyclictest0-21swapper/220:21:002
4179688993330,2cyclictest0-21swapper/200:17:592
4577091320,5ptp4l61490irq/134-eno1-TxRx-000:24:573
4179691993230,1cyclictest0-21swapper/319:58:593
4179691993230,1cyclictest0-21swapper/300:09:593
4179688993229,2cyclictest0-21swapper/222:18:592
4179691993129,1cyclictest0-21swapper/321:24:593
4179691993128,2cyclictest4191256-21turbostat19:49:563
4179688993129,1cyclictest0-21swapper/222:45:002
4179688993128,2cyclictest0-21swapper/200:31:592
4179688993128,2cyclictest0-21swapper/200:27:002
417969199300,29cyclictest0-21swapper/320:15:133
417969199300,28cyclictest0-21swapper/319:25:023
417969199300,28cyclictest0-21swapper/319:25:023
4179688993027,2cyclictest0-21swapper/223:25:132
4179688993027,2cyclictest0-21swapper/220:36:592
4577091290,6ptp4l441ktimers/323:55:013
4577091290,6ptp4l441ktimers/322:25:013
4179691992927,1cyclictest0-21swapper/322:45:023
4179691992927,1cyclictest0-21swapper/322:15:123
4179691992926,2cyclictest65561-21turbostat23:15:013
417969199290,28cyclictest0-21swapper/320:20:123
417969199290,27cyclictest0-21swapper/322:30:133
417969199290,27cyclictest0-21swapper/320:55:153
417969199290,27cyclictest0-21swapper/320:50:033
417969199290,27cyclictest0-21swapper/320:40:133
417969199290,1cyclictest0-21swapper/321:15:133
417969199290,1cyclictest0-21swapper/321:15:133
4179688992926,2cyclictest0-21swapper/223:30:592
4179688992926,2cyclictest0-21swapper/223:20:142
4179688992926,2cyclictest0-21swapper/221:15:032
4179688992926,2cyclictest0-21swapper/221:15:032
4179688992926,2cyclictest0-21swapper/219:55:142
4179688992926,2cyclictest0-21swapper/219:25:042
4179688992926,2cyclictest0-21swapper/219:25:032
4179688992925,2cyclictest0-21swapper/219:30:142
417968899290,27cyclictest0-21swapper/221:05:142
4577091280,7ptp4l61490irq/134-eno1-TxRx-021:55:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-023:40:003
4577091280,6ptp4l441ktimers/321:10:013
4577091280,6ptp4l441ktimers/321:10:013
4577091280,6ptp4l441ktimers/321:05:003
4577091280,6ptp4l441ktimers/320:34:553
4179691992825,2cyclictest0-21swapper/322:35:143
4179691992825,2cyclictest0-21swapper/322:10:123
417969199280,26cyclictest0-21swapper/320:45:143
417969199280,26cyclictest0-21swapper/319:35:113
417969199280,26cyclictest0-21swapper/319:25:023
417969199280,26cyclictest0-21swapper/319:25:013
417969199280,1cyclictest0-21swapper/300:40:023
4179688992825,2cyclictest0-21swapper/223:50:022
4179688992825,2cyclictest0-21swapper/223:05:132
4179688992825,2cyclictest0-21swapper/221:50:132
4179688992825,2cyclictest0-21swapper/220:00:142
417968899280,27cyclictest0-21swapper/222:35:582
417968899280,26cyclictest0-21swapper/223:15:142
417968899280,26cyclictest0-21swapper/200:10:132
4577091270,6ptp4l61490irq/134-eno1-TxRx-021:50:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:15:003
4577091270,6ptp4l441ktimers/323:04:553
4577091270,6ptp4l441ktimers/320:40:003
4577091270,5ptp4l61490irq/134-eno1-TxRx-000:30:003
417969199270,26cyclictest0-21swapper/323:20:583
417969199270,26cyclictest0-21swapper/320:29:593
417969199270,25cyclictest0-21swapper/323:05:583
417969199270,1cyclictest0-21swapper/321:35:143
417969199270,1cyclictest0-21swapper/319:50:133
4179688992724,2cyclictest0-21swapper/222:31:002
4179684992722,4cyclictest4179549-21latency_hist19:10:030
4577091260,5ptp4l441ktimers/323:29:543
4577091260,5ptp4l441ktimers/322:29:563
4577091260,5ptp4l441ktimers/300:19:553
4179688992624,1cyclictest0-21swapper/222:54:582
417968899260,2cyclictest0-21swapper/223:42:592
4577091250,5ptp4l61490irq/134-eno1-TxRx-019:20:003
4577091250,4ptp4l441ktimers/321:44:563
4577091250,4ptp4l441ktimers/321:44:553
417968899250,24cyclictest0-21swapper/220:52:592
4179688992421,2cyclictest0-21swapper/219:46:592
4179688992421,2cyclictest0-21swapper/200:36:592
4179688992320,2cyclictest0-21swapper/221:35:142
4179688992219,2cyclictest0-21swapper/200:05:152
4179688992119,1cyclictest0-21swapper/221:24:592
4179688992118,2cyclictest0-21swapper/220:14:552
4179688992118,2cyclictest0-21swapper/220:14:552
4179688992118,2cyclictest0-21swapper/219:25:002
4179688992118,2cyclictest0-21swapper/219:25:002
4179688992017,2cyclictest0-21swapper/223:39:562
4179688992017,2cyclictest0-21swapper/221:27:592
4179688991916,2cyclictest0-21swapper/219:13:592
4179688991714,2cyclictest0-21swapper/221:14:002
4179688991714,2cyclictest0-21swapper/221:13:592
4179687991513,1cyclictest4179759-21cat19:10:021
417968899129,2cyclictest0-21swapper/220:40:132
417968899118,2cyclictest0-21swapper/219:36:002
41796889985,2cyclictest0-21swapper/221:31:002
41796889985,2cyclictest0-21swapper/219:16:572
41796889963,2cyclictest0-21swapper/220:05:362
41796889930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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