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2026-04-02 - 17:52
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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 Thu Apr 02, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21364799111106,4cyclictest211977-21kworker/u8:1+events_unbound07:20:441
21364799110100,7cyclictest243327-21latency_hist09:05:021
21364799110100,7cyclictest243327-21latency_hist09:05:011
213647999989,7cyclictest300868-21latency_hist12:05:011
213647999283,7cyclictest266-21systemd-journal09:39:591
213643999083,5cyclictest241728-21latency_hist09:00:010
213643998878,8cyclictest211977-21kworker/u8:1+flush-179:009:25:010
213643998876,8cyclictest291310-21latency_hist11:35:000
213643998476,5cyclictest306519-21kworker/u8:3+events_unbound12:30:230
213647998277,4cyclictest259259-21kworker/u8:1+events_unbound10:20:201
213643998173,6cyclictest297671-21latency_hist11:55:000
213643998075,3cyclictest215415-21kworker/u8:2+flush-179:007:25:200
213643998074,4cyclictest275443-21kworker/u8:1+events_unbound12:15:210
213647997974,4cyclictest278616-21kworker/u8:3+events_unbound10:55:201
213643997968,9cyclictest270384-21apt-get10:30:000
213643997870,6cyclictest292904-21latency_hist11:40:010
213647997766,8cyclictest217329-21latency_hist07:30:011
213643997667,7cyclictest267189-21latency_hist10:20:000
213647997570,4cyclictest211977-21kworker/u8:1+events_unbound08:31:011
213647997469,4cyclictest259259-21kworker/u8:1+events_unbound10:25:231
213647997469,3cyclictest286596-21kworker/u8:3+events_unbound11:30:021
213647997467,6cyclictest297707-21kworker/u8:0+events_unbound12:20:241
213647997466,6cyclictest223712-21apt-get08:05:071
213643997468,4cyclictest211977-21kworker/u8:1+events_unbound07:15:190
213647997365,6cyclictest288138-21latency_hist11:25:021
213647997268,3cyclictest217311-21kworker/u8:0+events_unbound07:35:211
213647997267,4cyclictest231980-21kworker/u8:3+events_unbound09:28:011
213643997266,4cyclictest275443-21kworker/u8:1+flush-179:011:20:210
213643997264,6cyclictest304035-21latency_hist12:15:010
213647997160,9cyclictest265845-21apt-get10:15:121
213643997163,6cyclictest244912-21latency_hist09:10:010
213647997060,8cyclictest227141-21apt-get08:15:101
213643997059,9cyclictest219996-21apt-get07:45:080
213647996964,4cyclictest306519-21kworker/u8:3+events_unbound12:30:151
213647996960,7cyclictest229009-21apt-get08:20:111
213643996962,5cyclictest276992-21latency_hist10:50:000
21364399690,66cyclictest0-21swapper/009:27:590
213647996864,3cyclictest252849-21kworker/u8:2+events_unbound09:45:251
213647996863,4cyclictest294539-21kworker/u8:3+events_unbound11:46:001
213647996863,4cyclictest281809-21kworker/u8:0+events_unbound11:15:021
213643996862,5cyclictest259259-21kworker/u8:1+flush-179:010:20:150
213647996761,4cyclictest225297-21apt-get08:10:111
213647996757,8cyclictest296345-21apt-get11:50:111
213643996761,4cyclictest231980-21kworker/u8:3+flush-179:008:30:220
213643996755,9cyclictest266-21systemd-journal12:00:010
213647996661,4cyclictest297707-21kworker/u8:0+events_unbound12:05:191
213647996658,6cyclictest304070-21kworker/u8:2+flush-179:012:39:551
213647996657,6cyclictest252866-21latency_hist09:35:011
213643996658,6cyclictest223182-21latency_hist08:00:000
213647996561,3cyclictest281809-21kworker/u8:0+events_unbound11:10:011
213647996560,4cyclictest270348-21kworker/u8:3+events_unbound10:44:001
213643996558,5cyclictest275443-21kworker/u8:1+events_unbound11:25:150
213643996554,8cyclictest228493-21latency_hist08:20:010
213647996460,3cyclictest286596-21kworker/u8:3+events_unbound11:28:011
213647996460,3cyclictest211977-21kworker/u8:1+events_unbound07:15:491
213647996459,4cyclictest270348-21kworker/u8:3+events_unbound10:31:011
213647996459,4cyclictest231980-21kworker/u8:3+events_unbound09:14:001
213643996458,4cyclictest211977-21kworker/u8:1+flush-179:009:15:210
213643996456,6cyclictest217311-21kworker/u8:0+flush-179:007:35:140
213647996358,4cyclictest211977-21kworker/u8:1+events_unbound09:22:021
213647996354,6cyclictest297707-21kworker/u8:0+flush-179:011:55:261
213643996362,1cyclictest0-21swapper/009:58:590
213643996357,4cyclictest252849-21kworker/u8:2+flush-179:009:45:210
213647996258,3cyclictest277231-21kworker/u8:2+events_unbound11:02:041
213647996258,3cyclictest277231-21kworker/u8:2+events_unbound11:02:041
213647996258,3cyclictest215415-21kworker/u8:2+events_unbound07:49:501
213647996257,4cyclictest281809-21kworker/u8:0+events_unbound11:09:021
213647996254,7cyclictest275443-21kworker/u8:1+events_unbound12:20:001
213647996254,7cyclictest243581-21apt-get09:05:121
213643996257,3cyclictest1-21systemd08:30:000
213647996157,3cyclictest240384-21kworker/u8:0+events_unbound08:55:351
213647996156,4cyclictest231980-21kworker/u8:3+events_unbound09:18:021
213643996156,3cyclictest211977-21kworker/u8:1+flush-179:008:20:210
213643996153,6cyclictest284943-21latency_hist11:15:000
213643996153,6cyclictest221586-21latency_hist07:55:010
213647996056,3cyclictest259259-21kworker/u8:1+events_unbound10:01:031
213647996056,3cyclictest213559-21kworker/u8:0+events_unbound07:13:501
213647996056,3cyclictest211977-21kworker/u8:1+events_unbound07:42:511
213647995753,3cyclictest231980-21kworker/u8:3+events_unbound08:50:031
213643995651,4cyclictest211977-21kworker/u8:1+flush-179:008:05:170
213643995650,5cyclictest235615-21kworker/u8:2+flush-179:008:45:160
213647995545,6cyclictest908065-21snmpd08:42:591
213643995550,4cyclictest275443-21kworker/u8:1+events_unbound11:15:210
213647995446,6cyclictest232242-21gpgv08:30:011
213647995442,10cyclictest234312-21diskstats08:35:141
213643995445,7cyclictest275443-21kworker/u8:1+events_unbound11:40:120
213647995349,3cyclictest251254-21kworker/u8:0+events_unbound09:58:011
213643995344,7cyclictest266-21systemd-journal08:12:580
213643995248,3cyclictest252849-21kworker/u8:2+events_unbound09:35:140
213643995248,2cyclictest270348-21kworker/u8:3+events_unbound10:40:190
213643995247,4cyclictest297707-21kworker/u8:0+flush-179:012:25:140
213649995147,2cyclictest0-21swapper/208:59:592
213643995148,2cyclictest294539-21kworker/u8:3+events_unbound12:00:240
213643995146,4cyclictest231980-21kworker/u8:3+flush-179:009:00:160
213643995146,4cyclictest231980-21kworker/u8:3+flush-179:009:00:160
213643995145,4cyclictest278616-21kworker/u8:3+flush-179:010:55:160
4577091500,13ptp4l441ktimers/307:10:003
213647995046,3cyclictest291304-21kworker/u8:2+events_unbound11:41:221
213647995045,4cyclictest251254-21kworker/u8:0+events_unbound10:06:011
213643995045,4cyclictest281809-21kworker/u8:0+flush-179:011:09:550
213643995044,5cyclictest278616-21kworker/u8:3+events_unbound11:00:180
213643995044,5cyclictest278616-21kworker/u8:3+events_unbound11:00:180
213643995044,4cyclictest525-21gdbus07:20:430
213643995044,4cyclictest269388-21kworker/u8:2+flush-179:010:35:160
213643995044,4cyclictest269388-21kworker/u8:2+flush-179:010:35:150
213652994945,2cyclictest0-21swapper/308:59:583
213647994944,4cyclictest223161-21kworker/u8:3+events_unbound08:02:501
213647994844,3cyclictest251254-21kworker/u8:0+events_unbound10:46:021
213643994844,2cyclictest217851-21latency_hist07:35:000
213649994742,2cyclictest0-21swapper/207:21:592
213647994743,3cyclictest254516-21kworker/u8:3+events_unbound09:50:431
213647994742,4cyclictest223161-21kworker/u8:3+events_unbound07:59:511
213643994744,1cyclictest251254-21kworker/u8:0+events_unbound10:05:150
213643994743,3cyclictest259259-21kworker/u8:1+events_unbound10:00:180
213643994739,7cyclictest251254-21kworker/u8:0+flush-179:009:40:230
21364399471,42cyclictest213796-21systemd-user-ru07:12:130
213647994641,4cyclictest259259-21kworker/u8:1+events_unbound10:10:021
213647994641,4cyclictest211977-21kworker/u8:1+events_unbound07:50:021
213647994541,3cyclictest211977-21kworker/u8:1+events_unbound07:30:491
213643994540,4cyclictest277231-21kworker/u8:2+flush-179:010:50:160
213643994539,4cyclictest211977-21kworker/u8:1+flush-179:008:35:210
213643994537,7cyclictest231980-21kworker/u8:3+events_unbound08:40:140
213652994441,2cyclictest291317-21turbostat11:34:593
213647994440,3cyclictest251254-21kworker/u8:0+events_unbound09:40:431
213643994439,3cyclictest291304-21kworker/u8:2+flush-179:011:45:150
213652994340,2cyclictest0-21swapper/307:21:593
213649994238,2cyclictest0-21swapper/209:03:592
213649994238,2cyclictest0-21swapper/209:03:582
21364999420,2cyclictest0-21swapper/212:24:562
213647994237,4cyclictest275443-21kworker/u8:1+events_unbound10:52:011
213647994237,4cyclictest231980-21kworker/u8:3+events_unbound08:49:001
213647994235,5cyclictest308816-21latency_hist12:30:021
213643994238,3cyclictest270348-21kworker/u8:3+flush-179:010:30:180
213643994236,4cyclictest1-21systemd10:15:010
213647994137,3cyclictest297707-21kworker/u8:0+events_unbound12:13:201
213643994134,6cyclictest219760-21idleruntime-cro07:45:000
213643994134,5cyclictest211977-21kworker/u8:1+flush-179:009:10:150
213643994133,5cyclictest0-21swapper/009:53:590
21365299400,38cyclictest267182-21turbostat10:24:553
213643994037,3cyclictest297707-21kworker/u8:0+flush-179:012:05:180
231999390,13rtkit-daemon23940-21sendmail-mta07:07:310
213652993936,2cyclictest0-21swapper/309:03:593
213652993936,2cyclictest0-21swapper/309:03:593
21364799391,10cyclictest291568-21apt-get11:35:141
213652993835,2cyclictest0-21swapper/307:19:593
21365299380,36cyclictest0-21swapper/310:45:003
213649993835,2cyclictest0-21swapper/210:11:592
213649993834,2cyclictest0-21swapper/212:25:592
213649993834,2cyclictest0-21swapper/211:26:002
213649993834,2cyclictest0-21swapper/208:20:592
21364999380,35cyclictest0-21swapper/212:18:582
21365299370,35cyclictest0-21swapper/311:00:003
21365299370,35cyclictest0-21swapper/308:19:593
213649993733,2cyclictest0-21swapper/207:31:592
21364999370,35cyclictest0-21swapper/208:40:592
21365299360,29cyclictest0-21swapper/309:35:003
21365299360,1cyclictest0-21swapper/309:28:593
21364999360,1cyclictest0-21swapper/211:00:002
21364999360,1cyclictest0-21swapper/210:45:002
21364999360,1cyclictest0-21swapper/208:19:592
213643993635,1cyclictest0-21swapper/009:34:550
213643993631,4cyclictest275443-21kworker/u8:1+events_unbound12:20:140
213652993533,1cyclictest0-21swapper/312:09:553
213652993533,1cyclictest0-21swapper/311:26:003
213652993533,1cyclictest0-21swapper/308:20:593
213649993532,2cyclictest0-21swapper/211:01:002
213649993532,2cyclictest0-21swapper/211:00:592
213649993531,2cyclictest0-21swapper/209:30:582
213649993531,2cyclictest0-21swapper/207:15:592
21364399351,29cyclictest0-21swapper/008:50:130
4577091340,3ptp4l61490irq/134-eno1-TxRx-011:00:133
4577091340,3ptp4l61490irq/134-eno1-TxRx-011:00:133
213652993432,1cyclictest0-21swapper/312:25:593
213652993432,1cyclictest0-21swapper/311:45:003
213652993432,1cyclictest0-21swapper/310:11:593
213652993431,2cyclictest0-21swapper/307:32:003
213649993431,2cyclictest0-21swapper/210:07:582
213649993431,2cyclictest0-21swapper/209:45:582
213649993430,2cyclictest0-21swapper/211:43:592
213649993429,2cyclictest0-21swapper/207:58:592
21364999340,31cyclictest0-21swapper/212:08:002
21364999340,2cyclictest0-21swapper/209:13:592
213649993330,2cyclictest0-21swapper/209:55:592
213643993330,2cyclictest310419-21turbostat12:39:550
213652993229,2cyclictest0-21swapper/310:07:593
213652993229,2cyclictest0-21swapper/309:45:593
213649993229,2cyclictest0-21swapper/209:18:592
213649993229,2cyclictest0-21swapper/208:09:552
213652993129,1cyclictest0-21swapper/308:34:593
213652993129,1cyclictest0-21swapper/308:12:593
213652993128,2cyclictest0-21swapper/307:58:593
213652993126,4cyclictest249694-21turbostat09:25:013
21365299310,28cyclictest0-21swapper/310:30:113
213649993128,2cyclictest0-21swapper/208:38:592
213649993128,2cyclictest0-21swapper/207:27:582
213649993127,2cyclictest0-21swapper/211:05:582
213649993127,2cyclictest0-21swapper/210:36:582
213649993127,2cyclictest0-21swapper/210:36:582
21364999310,2cyclictest0-21swapper/207:37:002
21364999310,29cyclictest0-21swapper/212:35:122
213647993127,3cyclictest269388-21kworker/u8:2+events_unbound10:37:381
213647993127,3cyclictest269388-21kworker/u8:2+events_unbound10:37:371
213652993028,1cyclictest0-21swapper/309:55:593
213652993026,2cyclictest0-21swapper/308:45:133
213652993026,2cyclictest0-21swapper/308:38:593
21365299300,29cyclictest0-21swapper/311:35:133
213649993027,2cyclictest0-21swapper/208:45:132
21364999300,2cyclictest0-21swapper/211:35:132
21364999300,2cyclictest0-21swapper/210:30:122
21364999300,28cyclictest0-21swapper/209:28:592
213652992927,1cyclictest0-21swapper/309:05:133
213652992927,1cyclictest0-21swapper/307:27:583
213652992926,2cyclictest0-21swapper/308:05:083
21365299290,28cyclictest0-21swapper/311:15:003
21365299290,27cyclictest0-21swapper/312:20:123
21365299290,27cyclictest0-21swapper/310:47:593
21365299290,27cyclictest0-21swapper/310:15:133
21365299290,27cyclictest0-21swapper/308:25:133
21365299290,21cyclictest0-21swapper/312:30:123
213649992927,1cyclictest0-21swapper/207:49:592
213649992925,2cyclictest0-21swapper/207:43:592
21364999290,27cyclictest0-21swapper/211:55:592
21364999290,27cyclictest0-21swapper/210:20:112
21364999290,27cyclictest0-21swapper/210:15:142
21364999290,27cyclictest0-21swapper/210:00:122
21364999290,27cyclictest0-21swapper/209:20:122
21364999290,27cyclictest0-21swapper/209:05:132
21364999290,27cyclictest0-21swapper/208:30:032
21364999290,27cyclictest0-21swapper/208:25:132
21364999290,21cyclictest0-21swapper/211:53:592
4577091280,6ptp4l441ktimers/310:39:563
4577091280,6ptp4l441ktimers/310:39:553
4577091280,6ptp4l441ktimers/308:44:563
4577091280,4ptp4l441ktimers/309:15:003
213652992825,2cyclictest0-21swapper/312:19:593
213652992825,2cyclictest0-21swapper/311:05:593
21365299280,27cyclictest0-21swapper/310:00:123
21365299280,27cyclictest0-21swapper/309:15:123
21365299280,26cyclictest0-21swapper/309:40:113
21365299280,1cyclictest0-21swapper/312:35:133
213649992825,2cyclictest0-21swapper/207:14:592
21364999280,2cyclictest0-21swapper/211:12:002
21364999280,2cyclictest0-21swapper/210:48:002
21364999280,2cyclictest0-21swapper/209:40:122
21364999280,26cyclictest0-21swapper/212:30:122
21364999280,26cyclictest0-21swapper/210:52:582
21364999280,26cyclictest0-21swapper/208:54:592
213647992815,4cyclictest29-21ksoftirqd/107:10:031
4577091270,5ptp4l441ktimers/311:20:003
4577091270,3ptp4l441ktimers/312:15:013
4577091270,3ptp4l441ktimers/311:25:013
213652992725,1cyclictest0-21swapper/307:49:593
21365299270,26cyclictest0-21swapper/311:53:593
213649992724,2cyclictest0-21swapper/211:34:592
213649992723,2cyclictest0-21swapper/212:01:592
213643992722,4cyclictest0-21swapper/008:05:000
4577091260,6ptp4l61490irq/134-eno1-TxRx-010:30:013
4577091260,3ptp4l441ktimers/307:54:563
213652992623,2cyclictest0-21swapper/307:43:593
213652992623,2cyclictest0-21swapper/307:38:593
21365299260,24cyclictest0-21swapper/307:11:393
213649992622,2cyclictest0-21swapper/210:25:132
21364999260,1cyclictest0-21swapper/211:19:592
4577091250,3ptp4l61490irq/134-eno1-TxRx-011:49:553
4577091250,3ptp4l61490irq/134-eno1-TxRx-009:55:003
4577091250,3ptp4l441ktimers/310:55:013
4577091250,3ptp4l441ktimers/308:54:553
4577091250,2ptp4l441ktimers/309:39:553
213652992522,2cyclictest0-21swapper/311:58:003
213649992521,2cyclictest0-21swapper/211:21:582
213652992422,1cyclictest0-21swapper/312:02:593
213649992422,1cyclictest0-21swapper/212:14:592
4577091230,2ptp4l441ktimers/308:04:553
213649992319,2cyclictest0-21swapper/207:51:592
213649992118,2cyclictest0-21swapper/209:51:592
213649992117,2cyclictest0-21swapper/208:10:132
213649991815,2cyclictest0-21swapper/211:46:002
213649991815,2cyclictest0-21swapper/209:35:132
2136499974,2cyclictest351rcuc/208:03:152
2136499940,3cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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