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2026-07-11 - 11:39
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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 Sat Jul 11, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
45082899134119,11cyclictest1213033-21systemd-journal21:20:001
45082599134123,8cyclictest484654-21latency_hist20:55:000
45082899121111,7cyclictest500579-21latency_hist21:45:021
45082599121112,6cyclictest534338-21kworker/u8:2+flush-179:023:50:000
45082599119111,5cyclictest524694-21apt-get22:57:210
45082899118109,7cyclictest1213033-21systemd-journal20:10:011
45082599116107,7cyclictest450691-21latency_hist19:10:020
4508289911589,8cyclictest489688-21apt-get21:10:111
45082899115110,4cyclictest480135-21kworker/u8:0+events_unbound21:05:001
45082599113104,6cyclictest481532-21kworker/u8:3+flush-179:021:29:590
45082899112106,4cyclictest517790-21kworker/u8:3+flush-179:023:35:231
45082899112105,5cyclictest533821-21kworker/u8:1+events_unbound23:45:001
4508259911299,9cyclictest1213033-21systemd-journal23:15:250
4508259911097,10cyclictest1213033-21systemd-journal00:00:000
4508289910898,8cyclictest453928-21latency_hist19:20:011
4508289910696,7cyclictest449232-21kworker/u8:3+flush-179:019:40:001
4508259910692,11cyclictest1213033-21systemd-journal23:30:010
4508259910692,11cyclictest1213033-21systemd-journal23:30:010
4508289910498,4cyclictest466087-21kworker/u8:2+events_unbound20:40:011
4508289910496,5cyclictest500623-21kworker/u8:0+flush-179:022:10:161
4508289910194,5cyclictest519968-21kworker/u8:0+events_unbound22:55:001
4508289910092,6cyclictest478269-21kworker/u8:1+flush-179:021:00:011
450828999891,6cyclictest551213-21kworker/u8:2+flush-179:000:30:001
450828999690,5cyclictest481532-21kworker/u8:3+flush-179:021:50:011
450828999690,4cyclictest519968-21kworker/u8:0+events_unbound23:15:241
450828999689,4cyclictest471518-21cp20:14:591
450825999690,4cyclictest513599-21kworker/u8:1+flush-179:022:25:220
450825999685,7cyclictest466087-21kworker/u8:2+flush-179:020:00:010
450828999487,5cyclictest461353-21kworker/u8:0+events_unbound20:00:241
450828999386,5cyclictest500623-21kworker/u8:0+flush-179:021:50:191
450828999386,5cyclictest500623-21kworker/u8:0+flush-179:021:50:191
450828999382,9cyclictest543887-40mandb00:00:001
450825999384,6cyclictest461353-21kworker/u8:0+flush-179:020:00:230
450828999287,4cyclictest517790-21kworker/u8:3+flush-179:023:10:001
450828999286,5cyclictest519968-21kworker/u8:0+events_unbound22:50:011
450828999285,5cyclictest519968-21kworker/u8:0+events_unbound23:00:011
450828999283,6cyclictest516976-21kworker/u8:0+flush-179:022:35:211
450828999184,5cyclictest461353-21kworker/u8:0+flush-179:020:25:261
450828999183,6cyclictest533821-21kworker/u8:1+flush-179:000:04:001
450828999083,5cyclictest508766-21kworker/u8:3+flush-179:022:20:161
450825998981,5cyclictest449232-21kworker/u8:3+flush-179:019:35:160
450828998882,4cyclictest461353-21kworker/u8:0+events_unbound19:50:011
450828998874,11cyclictest443517-21kworker/u8:2+events_unbound19:25:211
450828998680,4cyclictest461353-21kworker/u8:0+flush-179:020:20:211
450828998578,5cyclictest480135-21kworker/u8:0+flush-179:021:05:261
450825998576,6cyclictest550291-21latency_hist00:20:020
450825998473,8cyclictest483070-21latency_hist20:50:010
450825998375,6cyclictest547348-21apt-get00:10:090
450825998373,7cyclictest545508-21latency_hist00:05:010
450828998275,6cyclictest533821-21kworker/u8:1+flush-179:000:25:001
450825998276,4cyclictest507182-21/usr/sbin/munin22:05:230
450828998178,2cyclictest539745-21kworker/u8:0+events_unbound00:15:011
450828998174,5cyclictest490095-21kworker/u8:1+flush-179:022:15:191
450828998074,4cyclictest449232-21kworker/u8:3+flush-179:019:55:201
450825997971,6cyclictest455501-21latency_hist19:25:020
450825997971,6cyclictest455501-21latency_hist19:25:020
450828997872,4cyclictest478269-21kworker/u8:1+events_unbound20:45:241
450825997870,5cyclictest492626-21latency_hist21:20:020
450828997770,4cyclictest543824-21kworker/u8:2+events_unbound00:05:141
450825997771,4cyclictest466087-21kworker/u8:2+flush-179:020:05:210
450832997643,30cyclictest0-21swapper/323:45:593
450825997664,8cyclictest478269-21kworker/u8:1+flush-179:020:35:240
450828997467,4cyclictest533821-21kworker/u8:1+flush-179:000:15:211
450825997462,9cyclictest1213033-21systemd-journal22:10:130
450828997369,3cyclictest449232-21kworker/u8:3+events_unbound19:40:231
450828997359,11cyclictest1213033-21systemd-journal23:00:261
450828997359,11cyclictest1213033-21systemd-journal23:00:251
450825997364,6cyclictest519968-21kworker/u8:0+flush-179:022:50:220
450828997266,5cyclictest502195-21kworker/u8:4+events_unbound21:55:251
450828997265,5cyclictest534338-21kworker/u8:2+flush-179:023:50:211
450828997265,5cyclictest461353-21kworker/u8:0+flush-179:019:50:251
450828997166,4cyclictest513599-21kworker/u8:1+events_unbound22:30:011
450828997162,7cyclictest461353-21kworker/u8:0+events_unbound20:30:011
450828997063,5cyclictest513602-21kworker/u8:2+flush-179:022:30:151
450828997063,5cyclictest443517-21kworker/u8:2+events_unbound19:20:171
450828997063,5cyclictest443517-21kworker/u8:2+events_unbound19:20:171
450828997062,5cyclictest491055-21kworker/u8:2+flush-179:021:30:201
450828997058,6cyclictest519968-21kworker/u8:0+events_unbound23:10:141
450825997060,7cyclictest556898-21latency_hist00:40:020
450825997060,7cyclictest556898-21latency_hist00:40:020
450828996959,8cyclictest1213033-21systemd-journal20:40:231
450825996952,15cyclictest471405-21latency_hist20:15:010
450825996949,17cyclictest481483-21latency_hist20:45:010
450832996738,1cyclictest0-21swapper/320:53:583
450828996760,5cyclictest517790-21kworker/u8:3+flush-179:022:45:001
450825996759,5cyclictest443517-21kworker/u8:2+flush-179:019:25:170
45082899660,64cyclictest1-21systemd23:30:011
45082899660,64cyclictest1-21systemd23:30:011
450825996560,4cyclictest449232-21kworker/u8:3+flush-179:019:40:310
450825996559,4cyclictest443517-21kworker/u8:2+flush-179:019:10:240
450825996554,8cyclictest517790-21kworker/u8:3+flush-179:023:10:210
450828996458,4cyclictest466087-21kworker/u8:2+flush-179:020:15:151
450825996459,4cyclictest478269-21kworker/u8:1+events_unbound20:55:240
450825996457,5cyclictest508766-21kworker/u8:3+flush-179:022:20:200
450825996456,5cyclictest534338-21kworker/u8:2+events_unbound23:50:230
450825996356,5cyclictest517790-21kworker/u8:3+flush-179:023:20:240
450825996352,8cyclictest533821-21kworker/u8:1+flush-179:023:40:220
450828996256,4cyclictest539745-21kworker/u8:0+flush-179:023:45:201
450828996254,6cyclictest535889-21latency_hist23:35:001
450825996255,5cyclictest461353-21kworker/u8:0+events_unbound20:30:240
450825996250,9cyclictest449232-21kworker/u8:3+flush-179:019:30:230
450832996158,2cyclictest0-21swapper/320:00:003
450825996158,2cyclictest481532-21kworker/u8:3+events_unbound21:00:270
450825996154,5cyclictest481532-21kworker/u8:3+flush-179:021:40:200
450825996151,8cyclictest481532-21kworker/u8:3+flush-179:021:20:150
450825996051,7cyclictest525001-21kworker/u8:2+flush-179:023:00:150
450825996051,7cyclictest525001-21kworker/u8:2+flush-179:023:00:140
450828995953,4cyclictest481532-21kworker/u8:3+flush-179:021:29:561
450825995954,3cyclictest490095-21kworker/u8:1+flush-179:022:00:120
450825995953,4cyclictest517790-21kworker/u8:3+events_unbound23:05:150
450825995853,1cyclictest533821-21kworker/u8:1+flush-179:000:20:210
450832995748,6cyclictest489449-21turbostat21:09:593
450825995748,6cyclictest513602-21kworker/u8:2+flush-179:022:30:210
450825995648,6cyclictest543824-21kworker/u8:2+flush-179:000:05:160
450825995647,7cyclictest481532-21kworker/u8:3+events_unbound21:45:220
450825995541,11cyclictest1213033-21systemd-journal21:35:010
450825995449,4cyclictest449232-21kworker/u8:3+flush-179:019:15:260
450825995447,6cyclictest517790-21kworker/u8:3+flush-179:022:45:240
450825995443,8cyclictest510-21rs:main0
450825995350,2cyclictest480135-21kworker/u8:0+events_unbound21:10:220
450825995347,4cyclictest490095-21kworker/u8:1+flush-179:021:36:250
450825995346,5cyclictest513602-21kworker/u8:2+events_unbound22:35:230
450825995246,4cyclictest533821-21kworker/u8:1+flush-179:023:30:240
450825995242,8cyclictest504291-21diskstats21:55:140
450828995145,4cyclictest539745-21kworker/u8:0+flush-179:000:30:261
450828995142,6cyclictest517790-21kworker/u8:3+flush-179:023:20:161
450825995042,6cyclictest513602-21kworker/u8:2+flush-179:022:40:210
450832994947,1cyclictest0-21swapper/321:56:593
450828994945,3cyclictest500623-21kworker/u8:0+flush-179:022:05:241
450828994942,5cyclictest481532-21kworker/u8:3+events_unbound21:35:181
450825994944,3cyclictest512019-21systemd-run22:20:010
4577091480,13ptp4l61490irq/134-eno1-TxRx-019:10:003
450825994843,4cyclictest554741-21kworker/u8:1+flush-179:000:33:350
450825994841,5cyclictest553719-21latency_hist00:30:010
450828994738,5cyclictest481532-21kworker/u8:3+events_unbound21:20:151
450825994740,5cyclictest502420-21apt-get21:50:090
450825994740,5cyclictest502420-21apt-get21:50:080
450825994738,6cyclictest1213033-21systemd-journal19:46:240
450825994636,8cyclictest1213033-21systemd-journal20:30:010
450832994342,1cyclictest0-21swapper/321:02:593
450825994335,6cyclictest517790-21kworker/u8:3+flush-179:023:35:210
45082999420,39cyclictest0-21swapper/221:12:592
450828994237,4cyclictest478269-21kworker/u8:1+flush-179:020:50:171
450828994237,3cyclictest449232-21kworker/u8:3+flush-179:019:30:231
450828994236,4cyclictest551213-21kworker/u8:2+events_unbound00:35:161
450828994236,4cyclictest551213-21kworker/u8:2+events_unbound00:35:161
450825994121,4cyclictest464854-21timerwakeupswit19:50:250
45082999400,38cyclictest0-21swapper/222:28:592
450825994032,6cyclictest1213033-21systemd-journal20:25:010
450829993936,2cyclictest0-21swapper/223:25:002
45082999390,36cyclictest0-21swapper/219:50:002
450832993734,2cyclictest0-21swapper/319:44:003
450829993734,2cyclictest0-21swapper/219:45:012
450829993734,2cyclictest0-21swapper/219:25:012
450829993734,2cyclictest0-21swapper/219:25:012
45082999370,35cyclictest0-21swapper/220:51:592
45082999370,35cyclictest0-21swapper/219:18:592
45083299360,35cyclictest0-21swapper/323:55:593
45083299360,35cyclictest0-21swapper/322:36:003
45083299360,35cyclictest0-21swapper/322:29:593
45083299360,35cyclictest0-21swapper/322:07:583
450829993633,2cyclictest0-21swapper/222:33:592
45082999360,1cyclictest0-21swapper/221:27:592
45082999360,1cyclictest0-21swapper/200:13:592
450828993626,7cyclictest500623-21kworker/u8:0+flush-179:022:05:001
450825993634,1cyclictest0-21swapper/021:09:540
450832993533,1cyclictest0-21swapper/321:54:563
450832993533,1cyclictest0-21swapper/321:54:553
450832993532,2cyclictest0-21swapper/300:26:593
450829993533,1cyclictest0-21swapper/223:44:592
450829993533,1cyclictest0-21swapper/222:50:002
450829993533,1cyclictest0-21swapper/200:29:592
450829993532,2cyclictest0-21swapper/219:36:582
450829993531,2cyclictest0-21swapper/222:04:542
45082999350,1cyclictest0-21swapper/223:53:592
45082999350,1cyclictest0-21swapper/222:45:002
45082999350,1cyclictest0-21swapper/221:02:002
45082999350,1cyclictest0-21swapper/219:29:562
4577091340,6ptp4l61490irq/134-eno1-TxRx-023:10:003
450832993433,1cyclictest0-21swapper/323:54:553
450832993431,2cyclictest0-21swapper/322:02:003
450832993431,2cyclictest0-21swapper/321:14:593
45083299330,31cyclictest0-21swapper/319:35:593
450829993330,2cyclictest0-21swapper/223:37:592
450829993330,2cyclictest0-21swapper/223:16:592
450829993330,2cyclictest0-21swapper/222:56:002
450829993330,2cyclictest0-21swapper/220:25:002
450832993230,1cyclictest0-21swapper/323:05:003
450832993230,1cyclictest0-21swapper/323:04:593
450832993230,1cyclictest0-21swapper/320:15:003
450829993229,2cyclictest0-21swapper/200:04:552
450829993228,2cyclictest0-21swapper/221:49:552
45082899320,2cyclictest0-21swapper/119:14:551
450832993129,1cyclictest0-21swapper/300:12:593
450832993128,2cyclictest0-21swapper/322:51:003
450832993128,2cyclictest0-21swapper/320:45:143
45083299310,29cyclictest0-21swapper/300:35:123
45083299310,29cyclictest0-21swapper/300:35:123
450829993129,1cyclictest0-21swapper/223:50:002
450829993128,2cyclictest0-21swapper/222:09:562
450829993128,2cyclictest0-21swapper/200:30:592
45082999310,29cyclictest0-21swapper/220:12:002
4577091300,7ptp4l441ktimers/323:40:003
4577091300,7ptp4l441ktimers/320:45:013
4577091300,7ptp4l441ktimers/319:15:013
450832993028,1cyclictest0-21swapper/320:35:583
450832993028,1cyclictest0-21swapper/319:15:133
45083299300,23cyclictest0-21swapper/320:30:133
450829993027,2cyclictest0-21swapper/223:13:592
450829993027,2cyclictest0-21swapper/221:15:592
450829993026,2cyclictest0-21swapper/221:59:592
45082999300,27cyclictest0-21swapper/200:00:012
4577091290,6ptp4l441ktimers/323:20:003
4577091290,6ptp4l441ktimers/320:30:013
4577091290,6ptp4l441ktimers/320:05:003
4577091290,6ptp4l441ktimers/319:35:003
450832992927,1cyclictest0-21swapper/300:05:133
450832992925,2cyclictest0-21swapper/323:30:123
45083299290,28cyclictest0-21swapper/321:15:143
45083299290,28cyclictest0-21swapper/320:15:023
45083299290,21cyclictest0-21swapper/319:20:133
45083299290,21cyclictest0-21swapper/319:20:133
450829992926,2cyclictest0-21swapper/222:50:132
450829992926,2cyclictest0-21swapper/221:38:592
450829992926,2cyclictest0-21swapper/221:20:122
450829992926,2cyclictest0-21swapper/219:30:142
45082999290,28cyclictest0-21swapper/200:20:132
45082999290,27cyclictest0-21swapper/222:20:132
45082999290,27cyclictest0-21swapper/222:15:132
45082999290,27cyclictest0-21swapper/221:40:122
45082999290,27cyclictest0-21swapper/221:05:132
4577091280,6ptp4l61490irq/134-eno1-TxRx-000:05:003
4577091280,6ptp4l441ktimers/323:15:003
4577091280,5ptp4l61490irq/134-eno1-TxRx-019:49:593
4577091280,5ptp4l441ktimers/321:29:553
4577091280,4ptp4l441ktimers/300:35:013
45083299280,26cyclictest0-21swapper/321:35:133
45083299280,26cyclictest0-21swapper/319:50:133
45083299280,26cyclictest0-21swapper/300:20:033
45083299280,21cyclictest0-21swapper/322:15:033
450829992826,1cyclictest0-21swapper/223:10:002
450829992825,2cyclictest0-21swapper/222:37:582
450829992825,2cyclictest0-21swapper/222:15:012
450829992825,2cyclictest0-21swapper/220:42:592
450829992825,2cyclictest0-21swapper/220:29:592
450829992825,2cyclictest0-21swapper/220:15:122
45082999280,2cyclictest0-21swapper/221:50:112
45082999280,2cyclictest0-21swapper/221:50:112
45082999280,2cyclictest0-21swapper/220:30:032
45082999280,26cyclictest0-21swapper/223:25:112
45082999280,26cyclictest0-21swapper/223:25:112
45082999280,1cyclictest0-21swapper/220:55:112
4577091270,5ptp4l61490irq/134-eno1-TxRx-023:30:013
4577091270,5ptp4l61490irq/134-eno1-TxRx-023:30:013
4577091270,5ptp4l61490irq/134-eno1-TxRx-022:34:553
4577091270,5ptp4l61490irq/134-eno1-TxRx-021:24:553
4577091270,5ptp4l441ktimers/322:24:553
4577091270,5ptp4l441ktimers/322:15:013
4577091270,5ptp4l441ktimers/320:24:553
4577091270,5ptp4l441ktimers/320:09:563
450832992725,1cyclictest0-21swapper/319:29:593
450829992725,1cyclictest0-21swapper/220:00:002
450829992724,2cyclictest0-21swapper/220:35:122
45082999270,24cyclictest0-21swapper/200:39:002
45082999270,24cyclictest0-21swapper/200:39:002
4577091260,5ptp4l61490irq/134-eno1-TxRx-022:50:003
4577091260,5ptp4l61490irq/134-eno1-TxRx-022:45:003
4577091260,5ptp4l61490irq/134-eno1-TxRx-021:44:553
450829992622,2cyclictest0-21swapper/200:20:022
45082999260,24cyclictest0-21swapper/220:47:002
45082999260,24cyclictest0-21swapper/200:05:142
4577091250,5ptp4l61490irq/134-eno1-TxRx-021:49:563
4577091250,4ptp4l61490irq/134-eno1-TxRx-023:44:553
4577091250,4ptp4l61490irq/134-eno1-TxRx-000:20:013
450832992522,2cyclictest532725-21turbostat23:25:003
450832992522,2cyclictest0-21swapper/322:59:593
450829992522,2cyclictest0-21swapper/220:00:592
4577091230,3ptp4l441ktimers/321:34:553
450829992320,2cyclictest0-21swapper/220:06:582
450829992219,2cyclictest0-21swapper/221:32:592
450828992117,3cyclictest0-21swapper/119:10:011
450829992016,2cyclictest0-21swapper/219:13:592
450829991917,1cyclictest0-21swapper/223:03:592
450829991917,1cyclictest0-21swapper/223:03:592
450829991815,2cyclictest0-21swapper/219:53:582
4577091160,3ptp4l441ktimers/320:55:233
45082999118,2cyclictest0-21swapper/223:30:592
4508299930,2cyclictest0-21swapper/219:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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