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2026-09-17 - 10:42
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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 Thu Sep 17, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
51451499156148,5cyclictest511587-21kworker/u8:0+flush-179:020:10:001
51451399156140,13cyclictest548399-21apt-get20:55:000
51451399152139,9cyclictest582590-21latency_hist22:40:010
51451399145133,9cyclictest564833-21latency_hist21:45:020
51451499144132,8cyclictest577820-21latency_hist22:25:001
51451399140126,10cyclictest590937-21gpgv23:05:010
51451499133125,6cyclictest563282-21kworker/u8:0+flush-179:022:30:001
51451499132124,5cyclictest582646-21kworker/u8:2+events_unbound23:00:241
51451499131123,6cyclictest601111-21kworker/u8:3+flush-179:023:45:011
51451499126113,10cyclictest587615-21latency_hist22:55:021
51451499126111,11cyclictest1213033-21systemd-journal00:04:001
51451399123108,11cyclictest508054-21kworker/u8:1+flush-179:019:10:020
51451399121113,5cyclictest511587-21kworker/u8:0+events_unbound19:15:010
51451499119111,5cyclictest590785-21kworker/u8:1+flush-179:023:25:011
51451499116109,5cyclictest612470-21kworker/u8:2+flush-179:000:10:251
51451499113106,5cyclictest514417-21kworker/u8:3+flush-179:019:25:211
51451399113104,6cyclictest574865-21/usr/sbin/munin22:15:270
51451399113104,6cyclictest574865-21/usr/sbin/munin22:15:270
5145139911098,8cyclictest580995-21latency_hist22:35:010
51451499109102,5cyclictest525647-21kworker/u8:2+flush-179:019:45:161
5145139910992,14cyclictest616050-21apt-get00:20:120
51451499107101,4cyclictest511587-21kworker/u8:0+flush-179:021:15:251
51451499107100,5cyclictest518642-21kworker/u8:1+flush-179:019:20:241
5145139910798,6cyclictest601111-21kworker/u8:3+flush-179:023:45:220
51451399107102,4cyclictest590785-21kworker/u8:1+flush-179:023:35:260
51451399107101,4cyclictest604354-21kworker/u8:0+flush-179:000:03:590
5145149910699,5cyclictest518642-21kworker/u8:1+events_unbound19:30:201
5145149910699,5cyclictest518642-21kworker/u8:1+events_unbound19:30:191
5145139910697,6cyclictest615830-21kworker/u8:3+flush-179:000:35:220
5145149910598,5cyclictest601111-21kworker/u8:3+flush-179:023:55:151
5145149910397,4cyclictest604354-21kworker/u8:0+events_unbound00:15:201
5145149910396,4cyclictest556925-21kworker/u8:2+flush-179:022:00:181
5145149910293,7cyclictest612470-21kworker/u8:2+events_unbound00:35:011
5145139910291,8cyclictest600081-21diskstats23:30:140
5145139910093,4cyclictest585780-21kworker/u8:0+flush-179:022:50:140
5145139910089,8cyclictest535138-21latency_hist20:15:000
514514999988,8cyclictest544962-21latency_hist20:45:021
514513999991,6cyclictest574661-21kworker/u8:1+flush-179:022:45:250
514513999991,6cyclictest534215-21kworker/u8:1+flush-179:020:20:250
514513999987,9cyclictest607747-21apt-get23:55:110
514513999888,7cyclictest525647-21kworker/u8:2+flush-179:019:45:220
514514999790,5cyclictest601111-21kworker/u8:3+flush-179:023:50:211
514514999784,10cyclictest553943-21apt-get21:10:121
514513999788,6cyclictest563282-21kworker/u8:0+flush-179:021:55:160
514514999690,5cyclictest615830-21kworker/u8:3+flush-179:000:25:141
514514999689,5cyclictest590785-21kworker/u8:1+flush-179:023:25:211
514514999590,4cyclictest511587-21kworker/u8:0+flush-179:021:05:271
514514999589,4cyclictest563282-21kworker/u8:0+flush-179:021:55:211
514514999585,7cyclictest590785-21kworker/u8:1+flush-179:023:30:201
514514999581,7cyclictest543411-21kworker/u8:2+events_unbound20:45:161
514513999582,10cyclictest1213033-21systemd-journal22:25:170
514514999487,4cyclictest551302-21kworker/u8:1+events_unbound21:30:241
514514999486,5cyclictest563282-21kworker/u8:0+flush-179:022:05:141
514514999484,7cyclictest550251-21latency_hist21:00:001
514514999387,4cyclictest551302-21kworker/u8:1+flush-179:021:00:221
514513999381,9cyclictest571711-21apt-get22:05:110
514513999278,11cyclictest1213033-21systemd-journal20:29:590
514514999185,4cyclictest551302-21kworker/u8:1+flush-179:021:20:161
514514999080,8cyclictest604576-21apt-get23:45:121
514513999076,11cyclictest566961-21diskstats21:50:140
514513998980,7cyclictest553554-21gpgv21:10:010
514514998882,4cyclictest556925-21kworker/u8:2+events_unbound22:20:001
514514998882,4cyclictest556925-21kworker/u8:2+events_unbound22:20:001
514513998882,4cyclictest551302-21kworker/u8:1+flush-179:021:25:120
514513998879,6cyclictest571456-21latency_hist22:05:000
514514998679,5cyclictest563282-21kworker/u8:0+events_unbound21:45:141
514514998677,6cyclictest525647-21kworker/u8:2+flush-179:019:50:211
514514998675,8cyclictest581231-21/usr/sbin/munin22:35:251
514513998679,5cyclictest604354-21kworker/u8:0+flush-179:000:15:210
514513998679,5cyclictest560096-21kworker/u8:3+flush-179:021:35:000
514513998679,5cyclictest511587-21kworker/u8:0+events_unbound20:05:010
514514998579,4cyclictest612470-21kworker/u8:2+events_unbound00:20:241
514514998474,7cyclictest514417-21kworker/u8:3+events_unbound19:40:191
514514998473,7cyclictest511587-21kworker/u8:0+flush-179:020:10:211
514513998477,5cyclictest511587-21kworker/u8:0+flush-179:021:15:170
514513998476,6cyclictest545475-21apt-get20:45:130
514513998474,8cyclictest536729-21latency_hist20:20:020
514513998472,9cyclictest591324-21apt-get23:05:120
514513998471,10cyclictest1213033-21systemd-journal23:00:010
514514998375,6cyclictest534215-21kworker/u8:1+flush-179:020:20:201
514514998374,6cyclictest590785-21kworker/u8:1+events_unbound23:35:201
514514998373,7cyclictest534215-21kworker/u8:1+events_unbound20:30:151
514513998372,8cyclictest528774-21latency_hist19:55:000
514514998276,4cyclictest514417-21kworker/u8:3+flush-179:020:00:111
514514998275,5cyclictest577855-21kworker/u8:3+flush-179:022:30:191
514514998275,5cyclictest543411-21kworker/u8:2+flush-179:020:50:241
514514998272,7cyclictest560096-21kworker/u8:3+events_unbound21:40:211
514514998272,7cyclictest511587-21kworker/u8:0+events_unbound19:15:231
514513998277,3cyclictest601111-21kworker/u8:3+events_unbound00:05:290
514513998277,3cyclictest601111-21kworker/u8:3+events_unbound00:05:290
514513998275,5cyclictest601111-21kworker/u8:3+flush-179:023:40:220
514513998272,7cyclictest517578-21latency_hist19:20:010
514514998175,4cyclictest585780-21kworker/u8:0+flush-179:022:50:001
514513998174,5cyclictest1213033-21systemd-journal00:30:000
514514997972,5cyclictest551302-21kworker/u8:1+flush-179:021:25:191
514514997972,5cyclictest534215-21kworker/u8:1+flush-179:020:35:151
514514997872,5cyclictest585780-21kworker/u8:0+flush-179:022:55:271
514514997862,14cyclictest514417-21kworker/u8:3+flush-179:019:55:131
514513997873,4cyclictest543411-21kworker/u8:2+flush-179:020:44:550
514514997771,4cyclictest577855-21kworker/u8:3+events_unbound22:40:241
514513997770,6cyclictest577855-21kworker/u8:3+flush-179:022:40:200
514514997668,5cyclictest522341-21kworker/u8:2+flush-179:019:35:161
514514997668,5cyclictest508054-21kworker/u8:1+flush-179:019:10:191
514514997666,8cyclictest573296-21apt-get22:10:111
514513997667,6cyclictest582646-21kworker/u8:2+flush-179:023:10:170
514514997568,5cyclictest590785-21kworker/u8:1+flush-179:023:15:171
514513997569,4cyclictest514417-21kworker/u8:3+flush-179:019:35:180
514513997568,5cyclictest534215-21kworker/u8:1+events_unbound20:35:010
514513997567,5cyclictest614180-21latency_hist00:15:010
514514997469,4cyclictest556925-21kworker/u8:2+events_unbound21:50:251
514513997466,6cyclictest595977-21gpgv23:20:010
514514997361,9cyclictest1213033-21systemd-journal21:40:011
514513997363,5cyclictest560096-21kworker/u8:3+events_unbound21:35:260
514516997264,6cyclictest517595-21turbostat19:20:003
514513997166,4cyclictest563282-21kworker/u8:0+flush-179:021:45:190
514513997164,5cyclictest595820-21kworker/u8:0+flush-179:023:20:200
514513997161,8cyclictest1213033-21systemd-journal19:24:550
514514996960,6cyclictest582646-21kworker/u8:2+events_unbound23:10:201
514514996854,12cyclictest536741-21apt-get20:20:011
514514996662,3cyclictest582646-21kworker/u8:2+flush-179:023:05:211
51451599650,63cyclictest0-21swapper/223:47:592
514513996563,1cyclictest514417-21kworker/u8:3+events_unbound19:25:140
514513996559,4cyclictest601111-21kworker/u8:3+events_unbound23:55:000
514513996559,4cyclictest590785-21kworker/u8:1+flush-179:023:25:220
514513996558,5cyclictest551302-21kworker/u8:1+events_unbound21:00:220
514516996152,6cyclictest618974-21turbostat00:30:003
514513996157,3cyclictest514417-21kworker/u8:3+flush-179:019:55:160
514513996155,4cyclictest511587-21kworker/u8:0+flush-179:021:10:200
514513996152,6cyclictest522357-21latency_hist19:35:020
514513996152,6cyclictest522357-21latency_hist19:35:020
514513996054,5cyclictest556925-21kworker/u8:2+events_unbound22:10:190
514514995946,10cyclictest612459-21gpgv00:10:011
514514995946,10cyclictest612459-21gpgv00:10:011
514513995951,6cyclictest563282-21kworker/u8:0+flush-179:022:20:210
514513995950,7cyclictest612470-21kworker/u8:2+flush-179:000:30:230
514514995852,4cyclictest615830-21kworker/u8:3+events_unbound00:35:151
514514995347,4cyclictest534215-21kworker/u8:1+events_unbound20:25:141
514513995247,4cyclictest534215-21kworker/u8:1+flush-179:020:35:210
4577091520,25ptp4l61490irq/134-eno1-TxRx-019:05:313
514513995148,2cyclictest543411-21kworker/u8:2+events_unbound21:00:000
51451699440,43cyclictest0-21swapper/322:07:593
514513994436,6cyclictest514417-21kworker/u8:3+flush-179:019:40:200
4577091440,3ptp4l441ktimers/320:54:553
51451599410,39cyclictest0-21swapper/200:27:592
4577091410,32ptp4l61490irq/134-eno1-TxRx-022:55:143
514516994038,1cyclictest0-21swapper/320:27:583
51451699400,38cyclictest543393-21turbostat20:40:013
514515994037,2cyclictest0-21swapper/220:44:562
4577091400,3ptp4l441ktimers/323:35:133
514516993933,5cyclictest538598-21turbostat20:25:003
51451699390,4cyclictest550239-21turbostat21:00:003
51451699390,36cyclictest0-21swapper/319:56:593
514516993833,4cyclictest594256-21turbostat23:15:003
514516993832,5cyclictest579424-21turbostat22:30:013
51451699380,37cyclictest612343-21turbostat00:10:003
51451699380,37cyclictest612343-21turbostat00:10:003
514513993831,5cyclictest551302-21kworker/u8:1+flush-179:021:20:240
514516993731,5cyclictest553436-21turbostat21:10:003
51451699370,36cyclictest0-21swapper/323:33:593
514515993734,2cyclictest0-21swapper/223:30:592
51451599370,35cyclictest0-21swapper/219:15:592
51451599370,1cyclictest0-21swapper/221:14:592
51451399373,6cyclictest532222-21apt-get20:05:120
514516993634,1cyclictest0-21swapper/321:33:593
514516993629,5cyclictest592660-21turbostat23:10:003
51451699360,35cyclictest0-21swapper/323:47:593
514515993633,2cyclictest0-21swapper/223:23:592
514515993633,2cyclictest0-21swapper/220:17:582
514516993533,1cyclictest0-21swapper/322:18:593
514516993533,1cyclictest0-21swapper/322:18:593
514516993533,1cyclictest0-21swapper/320:31:593
514516993532,2cyclictest0-21swapper/319:32:593
514516993532,2cyclictest0-21swapper/319:32:593
51451699350,34cyclictest0-21swapper/321:36:593
51451699350,1cyclictest0-21swapper/321:27:593
514515993532,2cyclictest0-21swapper/220:54:542
51451599350,1cyclictest0-21swapper/222:56:592
51451599350,1cyclictest0-21swapper/219:11:592
514516993432,1cyclictest0-21swapper/323:19:553
514516993432,1cyclictest0-21swapper/300:39:593
514515993431,2cyclictest0-21swapper/222:50:592
514515993431,2cyclictest0-21swapper/222:06:592
514515993431,2cyclictest0-21swapper/220:05:002
514515993431,2cyclictest0-21swapper/200:20:592
51451599330,1cyclictest0-21swapper/220:55:142
514515993229,2cyclictest0-21swapper/221:28:592
514515993229,2cyclictest0-21swapper/220:13:592
514516993124,5cyclictest555285-21turbostat21:15:003
514515993129,1cyclictest0-21swapper/220:49:592
514515993129,1cyclictest0-21swapper/220:40:012
514515993128,2cyclictest0-21swapper/223:52:592
514515993128,2cyclictest0-21swapper/221:03:592
51451599310,2cyclictest0-21swapper/223:07:592
51451699300,28cyclictest0-21swapper/300:10:133
51451699300,1cyclictest0-21swapper/319:53:003
514515993027,2cyclictest0-21swapper/223:13:592
514515993027,2cyclictest0-21swapper/220:20:022
514515993027,2cyclictest0-21swapper/200:36:582
4577091300,5ptp4l61490irq/134-eno1-TxRx-022:04:553
514516992927,1cyclictest0-21swapper/322:30:123
514516992927,1cyclictest0-21swapper/320:41:583
514516992927,1cyclictest0-21swapper/319:40:593
514516992926,2cyclictest0-21swapper/321:45:103
51451699290,28cyclictest0-21swapper/320:45:033
51451699290,28cyclictest0-21swapper/320:00:133
51451699290,27cyclictest0-21swapper/320:05:123
51451699290,1cyclictest0-21swapper/322:39:553
514515992926,2cyclictest0-21swapper/222:15:182
514515992926,2cyclictest0-21swapper/222:15:172
514515992926,2cyclictest0-21swapper/221:45:112
514515992926,2cyclictest0-21swapper/221:05:142
514515992926,2cyclictest0-21swapper/219:40:582
514515992926,2cyclictest0-21swapper/219:24:552
51451599290,28cyclictest0-21swapper/220:30:122
51451599290,27cyclictest0-21swapper/219:35:132
51451599290,1cyclictest0-21swapper/220:27:592
51451599290,1cyclictest0-21swapper/200:10:022
4577091290,6ptp4l441ktimers/319:25:013
4577091290,6ptp4l441ktimers/300:05:013
514516992826,1cyclictest0-21swapper/321:15:143
514516992826,1cyclictest0-21swapper/319:35:123
514516992826,1cyclictest0-21swapper/300:15:123
514516992825,2cyclictest0-21swapper/322:00:023
514516992825,1cyclictest0-21swapper/323:54:553
514516992823,4cyclictest535151-21turbostat20:15:003
51451699280,27cyclictest0-21swapper/300:30:143
51451699280,26cyclictest0-21swapper/323:25:133
51451699280,26cyclictest0-21swapper/323:20:023
51451699280,26cyclictest0-21swapper/322:40:123
51451699280,1cyclictest0-21swapper/322:12:003
51451699280,1cyclictest0-21swapper/300:20:133
514515992826,1cyclictest0-21swapper/200:30:142
514515992825,2cyclictest0-21swapper/223:25:132
514515992825,2cyclictest0-21swapper/221:35:122
51451599280,2cyclictest0-21swapper/223:55:122
51451599280,2cyclictest0-21swapper/220:05:122
51451599280,2cyclictest0-21swapper/200:10:022
51451599280,27cyclictest0-21swapper/223:05:012
51451599280,27cyclictest0-21swapper/222:40:112
51451599280,27cyclictest0-21swapper/219:55:132
51451499280,26cyclictest514376-21latency_hist19:10:021
4577091280,7ptp4l441ktimers/322:50:003
4577091280,6ptp4l441ktimers/321:05:003
4577091280,6ptp4l441ktimers/320:20:013
4577091280,6ptp4l441ktimers/300:00:013
514516992724,2cyclictest0-21swapper/322:21:593
51451599270,24cyclictest0-21swapper/222:37:592
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:49:553
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:15:003
4577091270,5ptp4l61490irq/134-eno1-TxRx-021:55:013
4577091270,5ptp4l61490irq/134-eno1-TxRx-019:30:013
514516992623,2cyclictest0-21swapper/323:00:123
51451699260,24cyclictest0-21swapper/322:50:133
51451699260,24cyclictest0-21swapper/321:40:153
514515992624,1cyclictest0-21swapper/200:10:002
514515992623,2cyclictest0-21swapper/219:55:012
51451599260,2cyclictest0-21swapper/222:13:582
51451599260,24cyclictest0-21swapper/223:40:592
51451599260,24cyclictest0-21swapper/222:05:002
51451599260,24cyclictest0-21swapper/221:42:582
51451599260,24cyclictest0-21swapper/221:16:592
4577091260,5ptp4l441ktimers/321:24:563
514515992523,1cyclictest0-21swapper/223:36:002
514515992522,2cyclictest0-21swapper/222:49:002
4577091250,4ptp4l441ktimers/323:44:553
514515992419,2cyclictest0-21swapper/219:32:592
514515992419,2cyclictest0-21swapper/219:32:592
514515992321,1cyclictest0-21swapper/222:31:592
514515992320,2cyclictest0-21swapper/223:16:582
514515992320,2cyclictest0-21swapper/221:34:002
514515992320,2cyclictest0-21swapper/219:25:592
514515992220,1cyclictest0-21swapper/221:23:592
514515992220,1cyclictest0-21swapper/200:15:122
514515992219,2cyclictest0-21swapper/200:02:002
514515992118,2cyclictest0-21swapper/222:30:002
514515991512,2cyclictest0-21swapper/222:00:012
514515991512,2cyclictest0-21swapper/221:51:592
514515991310,2cyclictest0-21swapper/222:21:592
5145159995,2cyclictest0-21swapper/219:46:592
5145159920,1cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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