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2026-09-18 - 16:42
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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 376 highest latencies:
System rackeslot6.osadl.org (updated Fri Sep 18, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40154699146134,9cyclictest444710-21latency_hist09:25:010
40154699144132,8cyclictest481011-21latency_hist11:15:020
40154999131120,8cyclictest412625-21latency_hist07:45:021
40154999131119,9cyclictest472667-21gpgv10:50:001
40154699131120,8cyclictest453181-21latency_hist09:50:010
40154699131119,9cyclictest441517-21latency_hist09:15:010
40154699129121,5cyclictest416028-21kworker/u8:0+events_unbound08:00:000
401546991281,125cyclictest1-21systemd10:10:010
40154999127118,7cyclictest420871-21kworker/u8:3+events_unbound08:20:001
40154699126118,5cyclictest451349-21kworker/u8:1+events_unbound10:00:240
40154699124118,4cyclictest420871-21kworker/u8:3+flush-179:008:30:150
40154699124114,8cyclictest490627-21latency_hist11:45:000
40154699122116,5cyclictest472515-21kworker/u8:2+flush-179:010:55:240
40154699119114,4cyclictest398389-21kworker/u8:2+events_unbound07:35:010
40154699118112,4cyclictest416028-21kworker/u8:0+events_unbound08:00:250
40154699116110,4cyclictest435125-21kworker/u8:1+flush-179:009:05:230
40154699116109,5cyclictest467734-21kworker/u8:0+events_unbound10:50:230
40154699116109,5cyclictest398389-21kworker/u8:2+events_unbound07:40:010
40154699116107,6cyclictest464327-21latency_hist10:25:010
40154999113106,5cyclictest416028-21kworker/u8:0+flush-179:007:55:141
40154999113102,8cyclictest451337-21latency_hist09:45:021
40154999113100,10cyclictest398389-21kworker/u8:2+flush-179:007:15:221
40154699113102,9cyclictest476655-21kworker/u8:0+flush-179:011:35:010
40154699112106,5cyclictest470219-21kworker/u8:1+flush-179:010:45:010
4015499910996,10cyclictest490579-21apt-get11:43:441
40154699109103,4cyclictest476655-21kworker/u8:0+flush-179:011:35:160
4015469910698,6cyclictest435125-21kworker/u8:1+flush-179:008:55:260
4015469910599,5cyclictest443161-21kworker/u8:2+flush-179:009:50:230
4015499910492,9cyclictest502279-21latency_hist12:20:011
4015469910498,4cyclictest465391-21kworker/u8:2+flush-179:010:30:200
4015469910397,5cyclictest435125-21kworker/u8:1+flush-179:009:05:010
4015469910393,8cyclictest446299-21apt-get09:30:000
4015499910292,7cyclictest482611-21latency_hist11:20:001
4015499910291,7cyclictest457962-21latency_hist10:05:011
4015499910290,9cyclictest502542-21apt-get12:20:101
4015469910296,4cyclictest460246-21kworker/u8:0+flush-179:010:15:200
4015469910294,5cyclictest470219-21kworker/u8:1+flush-179:010:45:140
4015469910292,8cyclictest398389-21kworker/u8:2+events_unbound07:30:000
4015469910196,3cyclictest443161-21kworker/u8:2+flush-179:010:00:000
4015469910193,5cyclictest398389-21kworker/u8:2+flush-179:007:15:250
4015499910086,13cyclictest435125-21kworker/u8:1+flush-179:009:10:241
4015469910094,4cyclictest498890-21kworker/u8:2+flush-179:012:25:210
4015469910094,4cyclictest498890-21kworker/u8:2+flush-179:012:25:200
401546999789,5cyclictest412599-21kworker/u8:1+flush-179:007:50:230
401546999788,7cyclictest416028-21kworker/u8:0+flush-179:008:10:010
401546999788,6cyclictest485838-21kworker/u8:3+flush-179:012:05:200
401546999690,4cyclictest395348-21kworker/u8:1+flush-179:007:10:200
401546999686,7cyclictest449730-21latency_hist09:40:010
401546999685,9cyclictest1213033-21systemd-journal10:40:010
401549999585,7cyclictest472515-21kworker/u8:2+flush-179:010:50:221
401546999587,5cyclictest416028-21kworker/u8:0+flush-179:008:25:220
401546999487,5cyclictest485838-21kworker/u8:3+flush-179:012:15:150
401546999452,40cyclictest395348-21kworker/u8:1+flush-179:007:25:000
401546999452,40cyclictest395348-21kworker/u8:1+flush-179:007:25:000
401546999386,6cyclictest428768-21kworker/u8:2+flush-179:008:55:000
401546999385,6cyclictest420258-21kworker/u8:1+events_unbound08:15:200
401546999385,5cyclictest409388-21kworker/u8:0+flush-179:007:40:200
401546999284,6cyclictest451349-21kworker/u8:1+flush-179:010:25:150
401546999270,14cyclictest485838-21kworker/u8:3+flush-179:012:30:240
401549999176,12cyclictest1213033-21systemd-journal08:49:591
401546999178,9cyclictest485838-21kworker/u8:3+events_unbound11:50:240
401546999078,9cyclictest1213033-21systemd-journal11:50:010
401555998886,1cyclictest0-21swapper/309:31:003
401549998865,20cyclictest435125-21kworker/u8:1+flush-179:009:00:161
401546998878,8cyclictest438324-21kworker/u8:3+flush-179:009:40:180
401546998877,8cyclictest485838-21kworker/u8:3+flush-179:011:55:200
401546998675,9cyclictest1213033-21systemd-journal08:25:000
401546998578,5cyclictest498812-21kworker/u8:1+flush-179:012:10:220
401546998578,5cyclictest476655-21kworker/u8:0+flush-179:011:20:150
401549998474,7cyclictest451349-21kworker/u8:1+events_unbound10:05:251
401546998471,7cyclictest474429-21kworker/u8:1+events_unbound11:00:140
401549998374,6cyclictest476655-21kworker/u8:0+flush-179:011:35:251
401546998377,4cyclictest485838-21kworker/u8:3+flush-179:012:00:240
401546998377,4cyclictest485838-21kworker/u8:3+flush-179:012:00:230
401549998169,9cyclictest435125-21kworker/u8:1+flush-179:008:55:011
401546998175,5cyclictest446362-21kworker/u8:1+events_unbound09:30:240
401546998172,6cyclictest485838-21kworker/u8:3+events_unbound12:35:130
401549998069,8cyclictest498890-21kworker/u8:2+flush-179:012:25:221
401549998069,8cyclictest498890-21kworker/u8:2+flush-179:012:25:221
401549998065,11cyclictest414245-21gpgv07:50:001
401546998068,8cyclictest398389-21kworker/u8:2+events_unbound07:45:190
401549997868,8cyclictest443161-21kworker/u8:2+flush-179:009:35:011
401546997867,8cyclictest430383-21latency_hist08:40:010
401549997771,4cyclictest485838-21kworker/u8:3+flush-179:011:55:221
401549997768,7cyclictest398389-21kworker/u8:2+flush-179:007:35:201
401549997766,9cyclictest477835-21apt-get11:05:121
401546997768,7cyclictest476655-21kworker/u8:0+flush-179:011:25:200
401549997668,5cyclictest451349-21kworker/u8:1+flush-179:010:10:231
401549997668,5cyclictest422422-21latency_hist08:15:011
401549997664,10cyclictest510-21rs:main1
401546997671,4cyclictest430430-21kworker/u8:3+flush-179:008:41:440
401549997563,8cyclictest1213033-21systemd-journal08:40:211
401549997561,11cyclictest443161-21kworker/u8:2+flush-179:009:45:211
401549997464,7cyclictest484207-21latency_hist11:25:011
401549997367,4cyclictest451349-21kworker/u8:1+flush-179:010:30:161
401549997365,6cyclictest485838-21kworker/u8:3+flush-179:012:00:201
401549997365,6cyclictest485838-21kworker/u8:3+flush-179:012:00:201
401549997359,11cyclictest489032-21kworker/u8:2+flush-179:011:45:191
401546997365,5cyclictest472515-21kworker/u8:2+flush-179:011:05:130
401549997263,7cyclictest508906-21latency_hist12:40:021
401549997261,7cyclictest395348-21kworker/u8:1+events_unbound07:20:231
401549997261,7cyclictest395348-21kworker/u8:1+events_unbound07:20:231
401549997161,7cyclictest412599-21kworker/u8:1+events_unbound07:50:201
401546997164,5cyclictest438324-21kworker/u8:3+events_unbound09:20:010
401546997162,6cyclictest485838-21kworker/u8:3+flush-179:012:20:200
401549997058,8cyclictest460246-21kworker/u8:0+events_unbound10:15:231
401546997065,4cyclictest451349-21kworker/u8:1+events_unbound10:10:230
401549996962,5cyclictest435125-21kworker/u8:1+flush-179:008:55:241
401546996560,4cyclictest430430-21kworker/u8:3+flush-179:008:45:270
401549996352,8cyclictest1213033-21systemd-journal12:30:211
401549996250,10cyclictest1213033-21systemd-journal09:38:421
401546996154,6cyclictest480989-21kworker/u8:3+flush-179:011:15:150
401549995845,10cyclictest472515-21kworker/u8:2+flush-179:010:55:191
401546995650,4cyclictest420258-21kworker/u8:1+flush-179:008:10:140
401549995548,5cyclictest1213033-21systemd-journal07:31:431
401549995546,6cyclictest438324-21kworker/u8:3+flush-179:009:20:211
401549995542,10cyclictest1213033-21systemd-journal10:30:001
401549995520,25cyclictest0-21swapper/108:30:121
401549995446,6cyclictest493794-21latency_hist11:55:011
401549995446,6cyclictest479660-21/usr/sbin/munin11:10:241
401549995445,5cyclictest467734-21kworker/u8:0+flush-179:010:40:181
401549995443,8cyclictest403039-21latency_hist07:15:011
40154999540,52cyclictest420834-21cron08:10:001
401549995345,6cyclictest467734-21kworker/u8:0+flush-179:010:40:011
401549995339,11cyclictest443161-21kworker/u8:2+flush-179:009:25:121
4577091500,13ptp4l441ktimers/307:09:563
401549994928,19cyclictest499348-21apt-get12:10:111
401549994840,6cyclictest427201-21latency_hist08:30:011
401551994643,2cyclictest0-21swapper/208:41:592
401549994640,5cyclictest438324-21kworker/u8:3+events_unbound09:15:231
401549994639,5cyclictest398389-21kworker/u8:2+events_unbound08:05:011
401549994635,7cyclictest435125-21kworker/u8:1+events_unbound09:05:181
401555994543,1cyclictest0-21swapper/311:49:003
401549994539,5cyclictest497226-21kworker/u8:0+flush-179:012:05:161
401549994538,5cyclictest454766-21latency_hist09:55:001
401549994538,5cyclictest395348-21kworker/u8:1+flush-179:007:25:151
401551994433,9cyclictest0-21swapper/210:59:592
40154999440,41cyclictest486050-21apt-get11:30:121
40155599430,42cyclictest0-21swapper/311:24:583
401549994225,16cyclictest0-21swapper/110:25:011
40155599410,40cyclictest0-21swapper/311:13:003
401555994038,1cyclictest0-21swapper/308:19:593
401549994035,4cyclictest428768-21kworker/u8:2+events_unbound08:35:251
40154999401,24cyclictest714-21Xorg09:56:591
401555993937,1cyclictest0-21swapper/308:52:593
40154999381,23cyclictest714-21Xorg11:29:001
401555993735,1cyclictest0-21swapper/308:55:593
401551993734,2cyclictest0-21swapper/212:33:002
401551993734,2cyclictest0-21swapper/211:57:592
401551993734,2cyclictest0-21swapper/210:24:582
401551993734,2cyclictest0-21swapper/210:16:002
401551993734,2cyclictest0-21swapper/207:28:582
401551993729,6cyclictest0-21swapper/208:16:592
40155199370,2cyclictest0-21swapper/209:25:592
40155599360,1cyclictest0-21swapper/312:28:003
40155599360,1cyclictest0-21swapper/312:27:593
40155599360,1cyclictest0-21swapper/312:19:593
401551993631,4cyclictest0-21swapper/209:08:592
40155199360,1cyclictest0-21swapper/212:04:562
40155199360,1cyclictest0-21swapper/212:04:552
40155199360,1cyclictest0-21swapper/209:38:592
401549993618,16cyclictest0-21swapper/108:20:261
401555993533,1cyclictest0-21swapper/312:14:003
401555993533,1cyclictest0-21swapper/312:06:593
401555993533,1cyclictest0-21swapper/308:38:593
401555993532,2cyclictest0-21swapper/308:14:593
401551993532,2cyclictest0-21swapper/209:22:592
40155199350,2cyclictest0-21swapper/207:34:552
4577091340,3ptp4l61490irq/134-eno1-TxRx-007:10:123
401555993432,1cyclictest0-21swapper/307:48:593
401555993431,2cyclictest0-21swapper/310:16:593
401551993431,2cyclictest0-21swapper/211:29:592
401551993431,2cyclictest0-21swapper/207:36:002
401555993331,1cyclictest0-21swapper/311:36:583
401555993331,1cyclictest0-21swapper/310:30:593
401555993331,1cyclictest0-21swapper/307:18:593
401551993331,1cyclictest0-21swapper/212:40:002
401551993330,2cyclictest0-21swapper/208:47:592
401555993230,1cyclictest0-21swapper/311:05:003
401551993229,2cyclictest0-21swapper/212:20:592
401551993229,2cyclictest0-21swapper/210:39:552
401551993229,2cyclictest0-21swapper/207:19:592
4577091310,7ptp4l441ktimers/307:55:003
4577091310,6ptp4l441ktimers/310:45:013
4577091310,4ptp4l441ktimers/308:24:553
40155199310,29cyclictest0-21swapper/209:45:022
40155199310,1cyclictest0-21swapper/211:45:122
40155199310,1cyclictest0-21swapper/211:30:122
40155199310,1cyclictest0-21swapper/211:15:142
4577091300,7ptp4l441ktimers/310:25:013
4577091300,7ptp4l441ktimers/307:35:013
4577091300,6ptp4l441ktimers/312:40:003
4577091300,6ptp4l441ktimers/309:15:003
4577091300,6ptp4l441ktimers/308:45:003
4577091300,5ptp4l441ktimers/307:30:003
4577091300,5ptp4l441ktimers/307:25:023
4577091300,5ptp4l441ktimers/307:25:013
401555993028,1cyclictest0-21swapper/310:08:593
401555993028,1cyclictest0-21swapper/307:43:593
401555993027,2cyclictest0-21swapper/310:50:013
40155599300,5cyclictest436754-21turbostat09:04:563
401551993027,2cyclictest0-21swapper/208:30:112
401551993027,2cyclictest0-21swapper/208:14:552
401551993027,2cyclictest0-21swapper/208:00:002
401551993026,2cyclictest0-21swapper/209:33:582
401551993025,3cyclictest0-21swapper/210:30:122
40155199300,28cyclictest0-21swapper/210:50:032
40155199300,28cyclictest0-21swapper/207:47:592
40155199300,27cyclictest0-21swapper/209:45:002
4577091290,7ptp4l61490irq/134-eno1-TxRx-011:44:593
4577091290,7ptp4l441ktimers/310:14:563
4577091290,6ptp4l441ktimers/312:35:003
4577091290,5ptp4l61490irq/134-eno1-TxRx-011:30:003
4577091290,5ptp4l441ktimers/312:05:013
4577091290,5ptp4l441ktimers/312:05:003
401555992927,1cyclictest0-21swapper/311:55:583
401555992927,1cyclictest0-21swapper/309:54:553
401555992927,1cyclictest0-21swapper/309:19:553
40155599290,28cyclictest0-21swapper/308:25:103
40155599290,27cyclictest0-21swapper/311:55:013
40155599290,27cyclictest0-21swapper/310:50:013
40155599290,27cyclictest0-21swapper/310:25:123
401551992926,2cyclictest0-21swapper/210:00:122
40155199290,2cyclictest0-21swapper/207:40:112
40155199290,28cyclictest0-21swapper/208:20:132
40155199290,27cyclictest0-21swapper/211:35:142
40155199290,27cyclictest0-21swapper/210:00:002
4577091280,6ptp4l61490irq/134-eno1-TxRx-012:25:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-011:35:013
4577091280,6ptp4l441ktimers/310:39:563
4577091280,5ptp4l441ktimers/311:20:003
4577091280,5ptp4l441ktimers/309:39:563
4577091280,5ptp4l441ktimers/308:05:013
401555992826,1cyclictest0-21swapper/311:05:133
401555992826,1cyclictest0-21swapper/310:55:123
40155599280,26cyclictest0-21swapper/309:45:133
40155599280,26cyclictest0-21swapper/309:20:133
401551992825,2cyclictest0-21swapper/211:12:592
401551992825,2cyclictest0-21swapper/209:01:002
401551992825,2cyclictest0-21swapper/207:10:112
401551992824,2cyclictest0-21swapper/208:06:592
40155199280,2cyclictest0-21swapper/212:25:112
40155199280,2cyclictest0-21swapper/212:25:112
40155199280,26cyclictest0-21swapper/210:40:102
40155199280,26cyclictest0-21swapper/209:15:122
4577091270,5ptp4l61490irq/134-eno1-TxRx-009:29:543
4577091270,5ptp4l441ktimers/309:09:553
4577091270,5ptp4l441ktimers/308:49:553
4577091270,5ptp4l441ktimers/308:09:563
4577091270,5ptp4l441ktimers/307:39:553
401555992725,1cyclictest0-21swapper/308:34:593
40155599270,26cyclictest0-21swapper/310:00:593
40155599270,26cyclictest0-21swapper/307:56:593
40155599270,1cyclictest0-21swapper/309:40:103
401551992724,2cyclictest0-21swapper/208:39:562
401551992724,2cyclictest0-21swapper/207:20:132
401551992724,2cyclictest0-21swapper/207:20:122
401551992723,2cyclictest0-21swapper/211:04:002
40155199270,2cyclictest0-21swapper/210:50:002
401551992623,2cyclictest0-21swapper/209:51:592
401551992623,2cyclictest0-21swapper/209:15:002
401551992623,2cyclictest0-21swapper/208:03:592
40155199260,2cyclictest0-21swapper/211:44:542
40155199260,24cyclictest0-21swapper/211:08:592
401551992522,2cyclictest0-21swapper/211:21:592
401551992522,2cyclictest0-21swapper/210:25:592
401551992522,2cyclictest0-21swapper/208:28:592
40155199250,2cyclictest0-21swapper/211:51:002
40154999250,22cyclictest401649-21cat07:10:011
401551992421,1cyclictest0-21swapper/208:55:152
401551992320,2cyclictest0-21swapper/210:10:592
401551992118,2cyclictest0-21swapper/210:08:582
401555992018,1cyclictest0-21swapper/309:59:553
401551991916,2cyclictest0-21swapper/208:52:592
401551991815,2cyclictest0-21swapper/212:15:112
401551991815,2cyclictest0-21swapper/212:10:022
231999180,9rtkit-daemon908065-21snmpd07:09:130
401551991612,2cyclictest0-21swapper/212:05:592
401551991513,1cyclictest0-21swapper/207:50:122
4015519930,2cyclictest0-21swapper/207:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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