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2026-07-27 - 18:56
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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 Jul 27, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
323393799181146,25cyclictest3318964-21latency_hist11:35:011
323393499148140,5cyclictest3320825-21latency_hist11:40:010
323393499136130,4cyclictest3228030-21kworker/u8:3+flush-179:007:30:000
323393499136128,6cyclictest3266177-21kworker/u8:0+flush-179:009:05:000
323393499135126,7cyclictest3314163-21kworker/u8:0+flush-179:011:55:000
323393499129121,5cyclictest3312573-21kworker/u8:1+events_unbound11:15:010
323393499129120,7cyclictest3248460-21kworker/u8:0+flush-179:008:10:010
323393499126116,7cyclictest3237013-21latency_hist07:20:020
323393499126116,7cyclictest3237013-21latency_hist07:20:010
323393499125118,5cyclictest3245237-21kworker/u8:1+events_unbound08:00:250
323393499122115,5cyclictest3293271-21kworker/u8:3+events_unbound10:30:010
323393499122114,6cyclictest3245237-21kworker/u8:1+events_unbound09:00:010
323393799116103,10cyclictest1213033-21systemd-journal09:35:001
323393499114108,5cyclictest3312573-21kworker/u8:1+flush-179:011:25:000
32339379911299,10cyclictest1213033-21systemd-journal11:30:001
32339379911297,11cyclictest1213033-21systemd-journal07:35:011
323393499112105,5cyclictest3304627-21kworker/u8:2+flush-179:011:05:230
323393499112105,5cyclictest3220053-21kworker/u8:0+flush-179:007:10:230
323393499111104,5cyclictest3304627-21kworker/u8:2+flush-179:011:05:000
323393499111102,7cyclictest3339090-21apt-get12:35:120
32339349911098,9cyclictest3277593-21apt-get09:25:120
323393799109102,5cyclictest3326100-21apt-get11:55:151
32339349910998,9cyclictest510-21rs:main0
323393499109102,5cyclictest3283726-21kworker/u8:2+events_unbound10:15:140
323393499108101,3cyclictest3298056-21kworker/u8:1+flush-179:010:30:250
323393799107100,4cyclictest3228030-21kworker/u8:3+events_unbound07:25:011
323393499107101,4cyclictest3302981-21kworker/u8:0+flush-179:010:45:160
323393499107100,5cyclictest3293271-21kworker/u8:3+flush-179:010:40:260
323393499107100,5cyclictest3293271-21kworker/u8:3+events_unbound10:25:010
32339349910699,5cyclictest3275785-21kworker/u8:0+events_unbound09:35:150
32339349910698,6cyclictest3283726-21kworker/u8:2+flush-179:010:05:210
32339349910497,5cyclictest3283726-21kworker/u8:2+events_unbound10:10:160
32339379910389,11cyclictest1213033-21systemd-journal09:40:001
32339349910395,6cyclictest3239909-21kworker/u8:2+flush-179:007:45:280
32339349910294,6cyclictest3272556-21latency_hist09:10:010
32339349910195,4cyclictest3324293-21kworker/u8:2+flush-179:012:15:230
32339379910094,4cyclictest3266177-21kworker/u8:0+flush-179:009:00:261
32339349910094,5cyclictest3275785-21kworker/u8:0+flush-179:009:20:010
32339349910092,6cyclictest3256352-21kworker/u8:3+flush-179:008:25:210
3233937999988,9cyclictest3337505-21apt-get12:30:111
3233937999985,11cyclictest1213033-21systemd-journal07:24:591
3233937999984,11cyclictest3302981-21kworker/u8:0+flush-179:011:10:211
3233934999991,6cyclictest3283700-21kworker/u8:0+flush-179:009:45:210
3233934999991,6cyclictest3259551-21kworker/u8:0+events_unbound08:35:020
3233934999988,9cyclictest3334332-21apt-get12:20:110
3233937999890,6cyclictest1213033-21systemd-journal11:00:001
3233934999792,4cyclictest3314163-21kworker/u8:0+events_unbound11:45:010
3233937999690,4cyclictest3287129-21apt-get09:55:111
3233937999583,9cyclictest3261154-21latency_hist08:35:011
3233937999487,5cyclictest3331138-21apt-get12:10:131
3233937999484,7cyclictest3324259-21latency_hist11:50:001
3233937999473,18cyclictest3296974-21diskstats10:25:171
3233937999379,11cyclictest510-21rs:main1
3233937999379,10cyclictest1213033-21systemd-journal07:50:001
3233934999388,3cyclictest3314163-21kworker/u8:0+flush-179:012:00:160
3233934999383,8cyclictest3238606-21latency_hist07:25:010
3233934999383,7cyclictest3250030-21latency_hist08:00:010
3233934999286,4cyclictest3304627-21kworker/u8:2+flush-179:010:50:220
3233934999285,5cyclictest3314163-21kworker/u8:0+flush-179:012:10:270
3233934999285,5cyclictest3259551-21kworker/u8:0+flush-179:008:30:200
3233934999186,4cyclictest3261141-21kworker/u8:2+flush-179:008:40:260
3233934999084,4cyclictest3220053-21kworker/u8:0+flush-179:007:40:200
3233934998981,6cyclictest3248460-21kworker/u8:0+flush-179:008:15:190
3233937998879,6cyclictest3298056-21kworker/u8:1+events_unbound10:35:011
3233937998876,8cyclictest3286909-21kworker/u8:1+flush-179:010:05:011
3233937998876,6cyclictest3293271-21kworker/u8:3+events_unbound10:35:181
3233934998884,3cyclictest3293271-21kworker/u8:3+flush-179:010:35:270
3233937998779,6cyclictest3245237-21kworker/u8:1+flush-179:008:45:001
3233937998761,23cyclictest3259551-21kworker/u8:0+flush-179:008:35:161
3233934998782,3cyclictest3314163-21kworker/u8:0+events_unbound12:25:140
3233934998780,5cyclictest3277338-21latency_hist09:25:010
3233934998780,5cyclictest3277338-21latency_hist09:25:010
3233934998778,7cyclictest3314163-21kworker/u8:0+events_unbound12:10:000
3233934998681,4cyclictest3280502-21kworker/u8:3+flush-179:009:40:250
3233937998376,5cyclictest3239909-21kworker/u8:2+flush-179:007:50:141
3233937998375,6cyclictest3235410-21latency_hist07:15:011
3233934998377,4cyclictest3278905-21kworker/u8:1+events_unbound09:30:220
3233934998275,4cyclictest3302981-21kworker/u8:0+flush-179:010:55:130
3233937998175,4cyclictest3245237-21kworker/u8:1+events_unbound08:00:201
3233934998176,4cyclictest3314163-21kworker/u8:0+events_unbound11:25:280
3233934998172,6cyclictest3283726-21kworker/u8:2+events_unbound09:55:190
3233934998074,5cyclictest3239909-21kworker/u8:2+events_unbound07:50:180
3233937997972,4cyclictest3270958-21kworker/u8:2+flush-179:009:05:181
3233937997965,11cyclictest1213033-21systemd-journal08:30:001
3233937997873,3cyclictest3293271-21kworker/u8:3+flush-179:010:40:141
3233934997773,3cyclictest3220053-21kworker/u8:0+flush-179:007:30:260
3233934997772,4cyclictest3270958-21kworker/u8:2+flush-179:009:10:240
3233934997668,4cyclictest3304627-21kworker/u8:2+flush-179:011:15:150
3233934997564,8cyclictest3317616-21/usr/sbin/munin11:30:250
3233937997464,8cyclictest3220053-21kworker/u8:0+flush-179:007:15:231
3233937997464,8cyclictest3220053-21kworker/u8:0+flush-179:007:15:231
3233937997366,5cyclictest3245237-21kworker/u8:1+flush-179:008:54:561
3233934997363,6cyclictest3286909-21kworker/u8:1+flush-179:010:00:150
3233937997264,5cyclictest3324293-21kworker/u8:2+flush-179:012:15:181
3233937997163,5cyclictest3282091-21kworker/u8:1+flush-179:009:40:141
3233937997160,8cyclictest3320821-21apt-get11:40:011
3233934997162,6cyclictest3248460-21kworker/u8:0+flush-179:008:10:140
3233937997064,4cyclictest3270958-21kworker/u8:2+events_unbound09:10:171
3233937997063,5cyclictest3314163-21kworker/u8:0+flush-179:012:00:231
3233934997064,4cyclictest3256352-21kworker/u8:3+events_unbound08:20:160
3233937996963,5cyclictest3283726-21kworker/u8:2+flush-179:010:05:241
3233937996957,10cyclictest1213033-21systemd-journal09:55:011
3233934996963,4cyclictest3283726-21kworker/u8:2+events_unbound09:50:160
3233934996962,4cyclictest3322652-21kworker/u8:1+flush-179:011:45:210
3233937996859,6cyclictest3314163-21kworker/u8:0+flush-179:012:25:171
3233937996859,6cyclictest3245237-21kworker/u8:1+events_unbound08:45:271
3233937996858,7cyclictest3304627-21kworker/u8:2+events_unbound11:10:001
3233937996758,7cyclictest3253457-21apt-get08:10:131
3233937996751,9cyclictest3324293-21kworker/u8:2+flush-179:012:05:241
3233937996659,5cyclictest3312573-21kworker/u8:1+events_unbound11:20:011
3233937996655,9cyclictest3322652-21kworker/u8:1+events_unbound11:50:241
3233937996558,5cyclictest3239909-21kworker/u8:2+events_unbound07:55:231
3233937996558,4cyclictest3314163-21kworker/u8:0+flush-179:011:20:151
3233937996557,6cyclictest3283726-21kworker/u8:2+events_unbound10:15:181
3233934996559,4cyclictest3245237-21kworker/u8:1+events_unbound08:45:230
323393999640,61cyclictest0-21swapper/212:04:002
3233939996360,2cyclictest0-21swapper/210:03:002
3233937996356,5cyclictest3337223-21kworker/u8:2+flush-179:012:40:001
3233937996256,4cyclictest3330674-21kworker/u8:1+flush-179:012:20:151
3233937996253,6cyclictest3220053-21kworker/u8:0+flush-179:007:40:221
3233934996155,4cyclictest3261141-21kworker/u8:2+flush-179:008:50:150
3233937996055,4cyclictest3270958-21kworker/u8:2+flush-179:009:25:241
3233937996052,6cyclictest3275785-21kworker/u8:0+flush-179:009:20:241
3233937996052,6cyclictest3275785-21kworker/u8:0+flush-179:009:20:241
3233937996052,5cyclictest3304627-21kworker/u8:2+flush-179:011:00:011
3233937996050,7cyclictest3296434-21latency_hist10:25:011
3233937996039,3cyclictest3256403-21munin-plugin-st08:20:011
3233934996056,3cyclictest3322652-21kworker/u8:1+events_unbound11:55:280
3233941995957,1cyclictest0-21swapper/312:04:003
3233937995953,4cyclictest3256351-21kworker/u8:2+events_unbound08:20:241
3233941995653,2cyclictest0-21swapper/310:02:593
3233934995652,3cyclictest3330674-21kworker/u8:1+flush-179:012:30:250
3233937995547,6cyclictest3314163-21kworker/u8:0+flush-179:011:40:231
3233937995343,8cyclictest1213033-21systemd-journal09:48:451
4577091520,14ptp4l441ktimers/307:10:013
3233937995148,2cyclictest1213033-21systemd-journal08:05:441
3233939995046,2cyclictest0-21swapper/210:20:592
3233937994843,4cyclictest3242019-21kworker/u8:1+flush-179:007:35:171
3233937994536,7cyclictest3304627-21kworker/u8:2+flush-179:010:55:011
3233937994438,4cyclictest3268014-21kworker/u8:3+flush-179:008:55:171
3233937994237,4cyclictest3272591-21kworker/u8:1+flush-179:009:15:201
3233939994138,2cyclictest0-21swapper/210:14:592
3233941994037,2cyclictest0-21swapper/310:20:593
3233939993834,2cyclictest0-21swapper/207:42:002
323393999380,36cyclictest0-21swapper/208:17:582
323393999380,35cyclictest0-21swapper/208:49:592
3233941993734,2cyclictest0-21swapper/311:19:543
323394199370,35cyclictest0-21swapper/307:40:593
3233939993733,2cyclictest0-21swapper/207:16:592
3233939993733,2cyclictest0-21swapper/207:16:582
323393999370,35cyclictest0-21swapper/208:32:002
323393999370,2cyclictest0-21swapper/212:19:552
3233941993634,1cyclictest0-21swapper/311:07:593
3233941993634,1cyclictest0-21swapper/310:06:593
323394199360,35cyclictest0-21swapper/312:15:593
323394199360,35cyclictest0-21swapper/309:31:593
323394199360,35cyclictest0-21swapper/308:13:593
323394199360,1cyclictest0-21swapper/309:37:593
3233941993533,1cyclictest0-21swapper/309:14:593
323394199350,1cyclictest0-21swapper/310:17:593
3233939993533,1cyclictest0-21swapper/212:09:592
3233939993532,2cyclictest0-21swapper/209:41:592
3233941993432,1cyclictest0-21swapper/308:34:583
3233941993431,2cyclictest0-21swapper/310:14:593
3233941993431,2cyclictest0-21swapper/308:17:583
3233939993430,2cyclictest0-21swapper/208:04:552
323394199330,25cyclictest3307837-21turbostat11:00:003
3233939993330,2cyclictest0-21swapper/211:57:582
3233939993330,2cyclictest0-21swapper/209:51:592
3233937993329,3cyclictest3283726-21kworker/u8:2+flush-179:010:10:161
3233941993229,2cyclictest0-21swapper/309:29:593
3233939993228,2cyclictest0-21swapper/211:02:592
3233939993228,2cyclictest0-21swapper/207:31:582
323393999320,30cyclictest0-21swapper/208:41:592
323393999320,30cyclictest0-21swapper/208:13:002
3233941993130,1cyclictest0-21swapper/308:49:583
3233941993129,1cyclictest0-21swapper/311:14:593
323394199310,29cyclictest0-21swapper/310:35:033
3233939993128,2cyclictest0-21swapper/210:51:592
323393999310,2cyclictest0-21swapper/210:28:592
4577091300,7ptp4l441ktimers/310:55:013
3233941993028,1cyclictest0-21swapper/310:28:593
3233939993027,2cyclictest0-21swapper/211:35:022
3233939993027,2cyclictest0-21swapper/209:09:592
3233939993027,2cyclictest0-21swapper/209:00:162
3233939993027,2cyclictest0-21swapper/208:35:132
3233939993027,2cyclictest0-21swapper/207:49:582
3233939993027,1cyclictest0-21swapper/210:45:002
323393999300,28cyclictest0-21swapper/210:35:032
3233934993022,6cyclictest3233798-21latency_hist07:10:020
3233941992926,2cyclictest0-21swapper/312:09:583
3233941992926,2cyclictest0-21swapper/311:35:013
3233941992926,2cyclictest0-21swapper/310:40:133
3233941992926,2cyclictest0-21swapper/309:55:143
3233941992926,2cyclictest0-21swapper/307:16:593
3233941992926,2cyclictest0-21swapper/307:16:583
323394199290,28cyclictest0-21swapper/311:35:023
323394199290,27cyclictest0-21swapper/312:30:133
3233939992926,2cyclictest0-21swapper/209:20:132
3233939992926,2cyclictest0-21swapper/209:20:132
3233939992925,2cyclictest0-21swapper/211:45:132
323393999290,2cyclictest0-21swapper/210:30:132
323393999290,2cyclictest0-21swapper/209:15:132
323393999290,27cyclictest0-21swapper/212:30:122
323393999290,27cyclictest0-21swapper/211:35:012
323393999290,27cyclictest0-21swapper/211:15:152
323393999290,27cyclictest0-21swapper/211:05:122
323393999290,27cyclictest0-21swapper/209:55:132
323393999290,27cyclictest0-21swapper/209:10:142
323393999290,27cyclictest0-21swapper/207:35:592
4577091280,5ptp4l441ktimers/311:50:003
3233941992826,1cyclictest0-21swapper/309:20:133
3233941992826,1cyclictest0-21swapper/309:20:133
3233941992826,1cyclictest0-21swapper/308:42:003
323394199280,27cyclictest0-21swapper/310:30:133
323394199280,27cyclictest0-21swapper/309:51:593
323394199280,27cyclictest0-21swapper/309:00:153
323394199280,27cyclictest0-21swapper/308:35:133
323394199280,27cyclictest0-21swapper/307:25:023
323394199280,26cyclictest0-21swapper/311:55:163
323394199280,26cyclictest0-21swapper/309:15:133
3233939992825,2cyclictest0-21swapper/211:54:552
3233939992825,2cyclictest0-21swapper/208:00:002
323393999280,26cyclictest0-21swapper/210:55:142
4577091270,4ptp4l61490irq/134-eno1-TxRx-007:34:563
4577091270,4ptp4l441ktimers/312:40:003
4577091270,3ptp4l441ktimers/309:00:013
4577091270,3ptp4l441ktimers/307:49:593
3233941992725,1cyclictest0-21swapper/309:40:143
3233939992725,1cyclictest0-21swapper/207:25:002
3233939992724,2cyclictest0-21swapper/207:11:002
323393999270,25cyclictest0-21swapper/212:10:142
323393999270,25cyclictest0-21swapper/208:09:592
323393999270,24cyclictest0-21swapper/212:23:592
323393999270,19cyclictest0-21swapper/211:23:582
323393999270,19cyclictest0-21swapper/208:52:592
4577091260,4ptp4l441ktimers/311:54:543
4577091260,3ptp4l61490irq/134-eno1-TxRx-012:14:563
4577091260,3ptp4l61490irq/134-eno1-TxRx-008:55:003
4577091260,3ptp4l441ktimers/311:45:013
4577091260,3ptp4l441ktimers/310:50:013
4577091260,3ptp4l441ktimers/309:10:003
4577091260,3ptp4l441ktimers/307:24:563
4577091260,3ptp4l441ktimers/307:15:003
3233941992623,2cyclictest0-21swapper/308:04:553
3233941992623,2cyclictest0-21swapper/307:59:593
323394199260,25cyclictest3309444-21turbostat11:04:593
3233939992623,2cyclictest0-21swapper/212:28:582
3233939992622,2cyclictest0-21swapper/209:34:552
3233939992622,2cyclictest0-21swapper/207:52:592
323393999260,2cyclictest0-21swapper/211:29:592
323393999260,2cyclictest0-21swapper/209:39:552
323393999260,24cyclictest0-21swapper/212:36:002
323393999260,24cyclictest0-21swapper/209:48:002
3233937992621,4cyclictest3233950-21latency_hist07:10:011
4577091250,4ptp4l61490irq/134-eno1-TxRx-012:25:003
4577091250,3ptp4l61490irq/134-eno1-TxRx-009:49:563
4577091250,3ptp4l61490irq/134-eno1-TxRx-008:25:013
4577091250,3ptp4l61490irq/134-eno1-TxRx-007:55:013
4577091250,3ptp4l61490irq/134-eno1-TxRx-007:39:563
4577091250,3ptp4l441ktimers/311:29:563
4577091250,3ptp4l441ktimers/308:10:003
323394199250,24cyclictest0-21swapper/308:26:003
3233939992521,2cyclictest0-21swapper/208:23:592
323394199240,1cyclictest0-21swapper/311:24:563
3233939992421,2cyclictest0-21swapper/210:09:592
3233939992320,2cyclictest0-21swapper/211:10:592
3233939992118,2cyclictest0-21swapper/210:45:592
3233939992017,2cyclictest0-21swapper/211:40:022
3233939992017,2cyclictest0-21swapper/208:27:592
3233941991917,1cyclictest0-21swapper/312:25:593
3233939991916,2cyclictest0-21swapper/207:26:002
3233939991411,2cyclictest0-21swapper/210:19:552
323393999118,2cyclictest351rcuc/209:27:232
323393999118,2cyclictest351rcuc/208:55:432
32339399930,2cyclictest0-21swapper/207:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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