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2026-08-16 - 01:13
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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 Sat Aug 15, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33023299145135,7cyclictest393323-21latency_hist10:25:001
33023099142136,4cyclictest359882-21kworker/u8:2+flush-179:008:45:220
33023099142132,7cyclictest417454-21latency_hist11:40:010
33023099140134,4cyclictest367632-21kworker/u8:2+events_unbound09:20:010
33023099137131,4cyclictest388524-21kworker/u8:1+flush-179:010:20:250
33023099133122,8cyclictest437064-21latency_hist12:40:020
33023099126121,3cyclictest334954-21kworker/u8:0+events_unbound07:40:230
33023099125118,5cyclictest328637-21kworker/u8:2+flush-179:007:15:270
33023099125116,7cyclictest398065-21kworker/u8:2+events_unbound10:55:200
33023299124116,5cyclictest420671-21kworker/u8:3+flush-179:012:10:001
3302329912399,21cyclictest412678-21latency_hist11:25:011
33023299121108,10cyclictest395162-21apt-get10:30:111
33023099119110,4cyclictest349860-21kworker/u8:0+events_unbound08:25:000
33023099118108,4cyclictest377117-21kworker/u8:0+events_unbound10:05:240
33023099117112,4cyclictest344191-21kworker/u8:1+flush-179:007:50:270
33023299116106,6cyclictest409482-21latency_hist11:15:011
33023099116111,4cyclictest349860-21kworker/u8:0+events_unbound08:25:250
33023099116110,4cyclictest420671-21kworker/u8:3+flush-179:012:15:200
33023099116110,4cyclictest420671-21kworker/u8:3+flush-179:012:15:190
33023099115105,8cyclictest398096-21latency_hist10:40:010
33023099114109,3cyclictest398065-21kworker/u8:2+events_unbound11:25:140
33023099114108,4cyclictest344191-21kworker/u8:1+events_unbound07:55:200
33023099114103,4cyclictest328637-21kworker/u8:2+events_unbound07:20:250
33023099113108,4cyclictest415830-21kworker/u8:1+flush-179:011:40:150
33023099113108,3cyclictest420004-21kworker/u8:2+events_unbound11:45:260
33023099112107,4cyclictest377117-21kworker/u8:0+flush-179:009:55:240
33023099112103,6cyclictest374841-21kworker/u8:1+flush-179:009:40:150
33023099111106,4cyclictest388524-21kworker/u8:1+events_unbound10:25:240
33023099111106,3cyclictest359882-21kworker/u8:2+flush-179:008:50:130
33023099111105,4cyclictest401564-21kworker/u8:0+flush-179:011:05:260
33023099108102,4cyclictest344820-21kworker/u8:2+events_unbound08:05:160
3302309910795,8cyclictest351411-21latency_hist08:15:020
33023099107101,4cyclictest377117-21kworker/u8:0+events_unbound10:10:180
33023099107100,4cyclictest324091-21kworker/u8:3+events_unbound07:10:190
3302329910697,6cyclictest341618-21latency_hist07:45:001
3302329910598,5cyclictest390361-21kworker/u8:2+flush-179:010:15:251
3302309910599,4cyclictest361211-21kworker/u8:3+flush-179:009:00:210
33023099105100,4cyclictest398065-21kworker/u8:2+flush-179:010:50:270
3302309910495,6cyclictest386954-21latency_hist10:05:000
3302329910394,6cyclictest344820-21kworker/u8:2+flush-179:008:10:211
3302309910398,4cyclictest420671-21kworker/u8:3+flush-179:012:30:260
3302309910397,4cyclictest359882-21kworker/u8:2+events_unbound08:40:150
3302309910297,4cyclictest398065-21kworker/u8:2+flush-179:011:20:250
3302309910297,4cyclictest349860-21kworker/u8:0+events_unbound08:35:140
3302309910296,4cyclictest408354-21kworker/u8:1+events_unbound11:15:210
3302309910295,5cyclictest361211-21kworker/u8:3+events_unbound09:05:260
3302309910293,3cyclictest388524-21kworker/u8:1+events_unbound10:40:150
3302309910293,3cyclictest388524-21kworker/u8:1+events_unbound10:40:140
3302309910292,3cyclictest398065-21kworker/u8:2+events_unbound10:45:150
3302309910195,4cyclictest374841-21kworker/u8:1+flush-179:009:35:200
3302309910093,5cyclictest401564-21kworker/u8:0+events_unbound11:00:140
330230999989,8cyclictest1213033-21systemd-journal12:25:000
330230999892,4cyclictest324091-21kworker/u8:3+events_unbound07:25:280
330230999892,4cyclictest324091-21kworker/u8:3+events_unbound07:25:280
330232999786,9cyclictest1213033-21systemd-journal07:40:011
330230999791,4cyclictest334954-21kworker/u8:0+events_unbound07:35:170
330230999590,3cyclictest398065-21kworker/u8:2+flush-179:011:10:210
330232999483,9cyclictest354862-21apt-get08:25:131
330232999384,6cyclictest377117-21kworker/u8:0+events_unbound09:45:031
330232999285,5cyclictest377117-21kworker/u8:0+flush-179:009:55:001
330232999279,11cyclictest1213033-21systemd-journal10:05:001
33023099921,85cyclictest2304-21lightdm-gtk-gre11:30:220
330232999184,4cyclictest361211-21kworker/u8:3+flush-179:009:10:001
330230999187,3cyclictest324091-21kworker/u8:3+flush-179:007:45:250
330230999186,3cyclictest420004-21kworker/u8:2+events_unbound11:50:220
330232999083,5cyclictest432545-21apt-get12:25:121
330230999086,3cyclictest344820-21kworker/u8:2+events_unbound08:15:160
330230999079,8cyclictest396494-21latency_hist10:35:010
330230998984,4cyclictest370226-21kworker/u8:0+flush-179:009:10:260
330232998878,6cyclictest398065-21kworker/u8:2+flush-179:011:05:201
330232998780,4cyclictest414263-21latency_hist11:30:011
330232998777,8cyclictest1213033-21systemd-journal10:55:001
330230998782,4cyclictest377117-21kworker/u8:0+events_unbound09:50:210
330230998776,4cyclictest420004-21kworker/u8:2+events_unbound12:10:260
330230998674,9cyclictest1213033-21systemd-journal09:30:000
330232998575,7cyclictest398114-21apt-get10:40:011
330232998573,9cyclictest432046-21apt-get12:25:001
330230998473,4cyclictest420004-21kworker/u8:2+events_unbound11:55:200
330232998369,12cyclictest344191-21kworker/u8:1+flush-179:007:55:011
330230998378,3cyclictest367632-21kworker/u8:2+events_unbound09:30:150
330230998373,8cyclictest380844-21apt-get09:45:110
330230998069,4cyclictest420671-21kworker/u8:3+events_unbound12:03:380
330232997871,5cyclictest324091-21kworker/u8:3+flush-179:007:15:161
330230997873,4cyclictest430481-21kworker/u8:1+flush-179:012:25:250
330230997867,4cyclictest344191-21kworker/u8:1+events_unbound08:00:190
330232997769,5cyclictest398065-21kworker/u8:2+flush-179:010:55:211
330232997762,13cyclictest324091-21kworker/u8:3+flush-179:007:45:151
330230997772,4cyclictest324091-21kworker/u8:3+flush-179:007:30:170
330230997767,7cyclictest357779-21latency_hist08:35:020
330232997668,6cyclictest367632-21kworker/u8:2+events_unbound09:20:241
330230997671,4cyclictest364637-21kworker/u8:0+events_unbound09:00:000
330232997571,3cyclictest415830-21kworker/u8:1+flush-179:011:37:301
330232997565,7cyclictest349860-21kworker/u8:0+flush-179:008:15:221
330232997466,6cyclictest361211-21kworker/u8:3+events_unbound09:05:011
330230997470,3cyclictest367632-21kworker/u8:2+flush-179:009:20:260
330232997361,9cyclictest1213033-21systemd-journal08:00:261
330232997265,5cyclictest430481-21kworker/u8:1+flush-179:012:35:241
330232997265,5cyclictest393300-21kworker/u8:0+flush-179:010:25:151
330232997264,6cyclictest408354-21kworker/u8:1+flush-179:011:15:141
330232997264,5cyclictest358292-21apt-get08:35:131
330230997267,4cyclictest390361-21kworker/u8:2+events_unbound10:17:310
330232997164,5cyclictest420004-21kworker/u8:2+events_unbound11:55:221
330232997162,6cyclictest359882-21kworker/u8:2+flush-179:008:45:161
330232997161,7cyclictest415830-21kworker/u8:1+events_unbound11:40:211
330230997066,3cyclictest420004-21kworker/u8:2+events_unbound12:05:390
330232996965,2cyclictest420004-21kworker/u8:2+events_unbound12:10:191
330232996963,4cyclictest344191-21kworker/u8:1+events_unbound07:55:231
330232996961,5cyclictest415850-21latency_hist11:35:011
330232996961,5cyclictest372366-21latency_hist09:20:011
330232996760,5cyclictest420671-21kworker/u8:3+events_unbound12:15:221
330232996760,5cyclictest420671-21kworker/u8:3+events_unbound12:15:221
330232996759,5cyclictest359882-21kworker/u8:2+flush-179:008:40:171
330232996756,9cyclictest380348-21apt-get09:45:001
330232996558,3cyclictest420004-21kworker/u8:2+flush-179:011:45:231
330232996535,27cyclictest483-21cron09:40:001
330232996354,6cyclictest367632-21kworker/u8:2+flush-179:009:30:231
330232996255,5cyclictest344820-21kworker/u8:2+flush-179:008:20:271
330232996154,5cyclictest324091-21kworker/u8:3+flush-179:007:10:201
330236996056,2cyclictest0-21swapper/309:23:593
330232996052,5cyclictest328637-21kworker/u8:2+flush-179:007:20:151
330232996051,7cyclictest425701-21gpgv12:05:011
330232995953,4cyclictest364637-21kworker/u8:0+flush-179:008:55:251
330232995952,5cyclictest361211-21kworker/u8:3+flush-179:009:10:181
330232995952,5cyclictest324091-21kworker/u8:3+flush-179:007:25:251
330232995952,5cyclictest324091-21kworker/u8:3+flush-179:007:25:241
330232995943,13cyclictest1213033-21systemd-journal09:55:331
330232995834,21cyclictest338335-21latency_hist07:35:011
330236995755,1cyclictest0-21swapper/309:35:593
330232995752,4cyclictest344820-21kworker/u8:2+flush-179:008:30:251
330232995248,2cyclictest359882-21kworker/u8:2+flush-179:008:50:211
330232995245,5cyclictest377117-21kworker/u8:0+events_unbound10:15:001
330232995143,6cyclictest374841-21kworker/u8:1+flush-179:009:25:241
4577091500,13ptp4l441ktimers/307:10:003
330232995044,4cyclictest420671-21kworker/u8:3+flush-179:011:54:311
330232995032,16cyclictest349863-21systemd-run08:10:011
330232994843,3cyclictest406349-21systemd-run11:05:011
330232994842,4cyclictest1213033-21systemd-journal10:07:301
330232994838,8cyclictest434132-21apt-get12:30:121
330232994636,7cyclictest388524-21kworker/u8:1+flush-179:010:40:161
330232994636,7cyclictest388524-21kworker/u8:1+flush-179:010:40:161
330236994139,1cyclictest0-21swapper/307:44:003
330235994038,1cyclictest0-21swapper/212:15:002
330235994037,2cyclictest0-21swapper/211:15:592
330235994037,2cyclictest0-21swapper/210:58:592
330235993836,1cyclictest0-21swapper/207:24:592
330235993835,2cyclictest0-21swapper/212:04:552
33023599380,35cyclictest0-21swapper/211:27:592
33023599380,35cyclictest0-21swapper/210:45:012
33023599380,35cyclictest0-21swapper/210:45:012
33023599380,35cyclictest0-21swapper/209:10:002
33023599380,2cyclictest0-21swapper/212:33:592
330235993734,2cyclictest0-21swapper/211:22:592
33023599370,35cyclictest0-21swapper/207:27:002
33023599370,35cyclictest0-21swapper/207:26:592
330236993634,1cyclictest0-21swapper/309:07:593
330236993634,1cyclictest0-21swapper/308:01:593
330236993634,1cyclictest0-21swapper/307:50:593
33023699360,35cyclictest0-21swapper/310:54:593
33023699360,2cyclictest415855-21turbostat11:35:003
330235993633,2cyclictest0-21swapper/210:51:592
33023599360,1cyclictest0-21swapper/210:30:002
330232993613,21cyclictest401393-21unixbench-2d10:45:251
330236993533,1cyclictest0-21swapper/312:29:553
330236993533,1cyclictest0-21swapper/311:05:593
33023699350,1cyclictest0-21swapper/312:24:003
33023699350,1cyclictest0-21swapper/311:40:003
330235993532,2cyclictest0-21swapper/208:53:592
330236993432,1cyclictest0-21swapper/312:11:593
330236993432,1cyclictest0-21swapper/309:34:593
33023699340,2cyclictest0-21swapper/312:15:133
33023699340,2cyclictest0-21swapper/312:15:133
33023699340,1cyclictest0-21swapper/309:59:593
330235993431,2cyclictest0-21swapper/210:19:592
330235993431,2cyclictest0-21swapper/208:56:592
330235993431,2cyclictest0-21swapper/208:25:592
330235993431,2cyclictest0-21swapper/207:34:562
330235993430,2cyclictest0-21swapper/208:07:592
4577091330,2ptp4l441ktimers/308:25:143
330236993327,5cyclictest0-21swapper/310:05:593
33023699330,31cyclictest0-21swapper/307:35:593
330235993330,2cyclictest0-21swapper/210:35:592
330235993330,2cyclictest0-21swapper/208:40:592
330235993330,2cyclictest0-21swapper/207:43:002
330235993329,2cyclictest0-21swapper/210:20:592
330236993230,1cyclictest0-21swapper/309:47:593
330236993230,1cyclictest0-21swapper/309:41:593
330236993229,2cyclictest0-21swapper/312:07:593
330235993230,1cyclictest0-21swapper/207:14:582
330235993229,2cyclictest0-21swapper/211:37:592
330235993229,2cyclictest0-21swapper/208:36:592
330235993228,2cyclictest0-21swapper/209:32:592
330236993130,1cyclictest0-21swapper/311:47:593
330236993129,1cyclictest0-21swapper/309:04:593
33023699310,30cyclictest0-21swapper/309:25:143
33023699310,30cyclictest0-21swapper/308:43:593
330235993129,1cyclictest0-21swapper/211:14:592
330235993127,2cyclictest0-21swapper/211:57:592
231999310,20rtkit-daemon329833-21grep07:05:301
330236993028,1cyclictest0-21swapper/310:26:003
33023699300,28cyclictest0-21swapper/310:10:133
33023699300,1cyclictest0-21swapper/309:55:003
33023699300,1cyclictest0-21swapper/308:35:023
330235993027,2cyclictest0-21swapper/210:06:582
330235993027,2cyclictest0-21swapper/209:00:122
330235993027,2cyclictest0-21swapper/208:45:132
330235993027,2cyclictest0-21swapper/207:35:132
33023599300,28cyclictest0-21swapper/211:50:142
33023599300,28cyclictest0-21swapper/211:00:122
4577091290,7ptp4l441ktimers/311:50:013
4577091290,7ptp4l441ktimers/310:25:003
4577091290,6ptp4l441ktimers/310:50:003
4577091290,6ptp4l441ktimers/308:15:023
330236992928,1cyclictest0-21swapper/310:19:593
330236992927,1cyclictest0-21swapper/308:15:003
330236992926,2cyclictest0-21swapper/310:40:133
330236992926,2cyclictest0-21swapper/310:40:133
330236992925,3cyclictest0-21swapper/308:35:013
33023699290,28cyclictest0-21swapper/308:55:133
330235992927,1cyclictest0-21swapper/209:39:592
330235992926,2cyclictest0-21swapper/212:05:012
330235992926,2cyclictest0-21swapper/210:12:592
330235992926,2cyclictest0-21swapper/210:03:592
330235992926,2cyclictest0-21swapper/207:55:122
33023599290,2cyclictest0-21swapper/209:45:022
33023599290,27cyclictest0-21swapper/212:35:132
33023599290,27cyclictest0-21swapper/209:55:142
33023599290,27cyclictest0-21swapper/209:40:152
33023599290,27cyclictest0-21swapper/208:30:142
4577091280,7ptp4l441ktimers/311:45:003
4577091280,7ptp4l441ktimers/307:20:013
4577091280,6ptp4l441ktimers/310:30:013
4577091280,6ptp4l441ktimers/308:55:003
330236992826,1cyclictest0-21swapper/310:35:133
330236992826,1cyclictest0-21swapper/309:10:593
330236992825,2cyclictest0-21swapper/309:15:133
330236992825,2cyclictest0-21swapper/307:32:583
330236992822,5cyclictest0-21swapper/311:56:593
33023699280,26cyclictest0-21swapper/307:45:123
330235992825,2cyclictest0-21swapper/210:47:592
330235992825,2cyclictest0-21swapper/210:34:002
330235992825,2cyclictest0-21swapper/209:27:002
330235992824,2cyclictest0-21swapper/211:46:592
33023599280,27cyclictest0-21swapper/207:15:142
33023599280,25cyclictest0-21swapper/211:31:592
33023599280,21cyclictest0-21swapper/208:15:142
4577091270,6ptp4l441ktimers/310:04:553
4577091270,4ptp4l441ktimers/312:35:003
330236992725,1cyclictest0-21swapper/307:20:133
330236992724,2cyclictest0-21swapper/311:17:593
330236992723,2cyclictest0-21swapper/311:04:553
33023699270,2cyclictest409496-21turbostat11:15:003
33023699270,26cyclictest0-21swapper/312:35:593
33023699270,26cyclictest0-21swapper/308:20:133
33023699270,1cyclictest0-21swapper/307:14:003
4577091260,6ptp4l61490irq/134-eno1-TxRx-011:30:013
4577091260,6ptp4l441ktimers/308:10:003
4577091260,5ptp4l441ktimers/312:04:593
4577091260,5ptp4l441ktimers/311:24:553
4577091260,5ptp4l441ktimers/307:29:563
4577091260,5ptp4l441ktimers/307:29:563
4577091260,4ptp4l441ktimers/310:55:013
330235992623,2cyclictest0-21swapper/208:10:592
33023599260,24cyclictest0-21swapper/212:20:592
33023699250,24cyclictest0-21swapper/307:58:003
330235992523,1cyclictest0-21swapper/208:01:002
33023599250,24cyclictest0-21swapper/209:20:132
330235992422,1cyclictest0-21swapper/212:29:592
330235992422,1cyclictest0-21swapper/209:15:592
330235992421,2cyclictest0-21swapper/209:50:582
330235992421,2cyclictest0-21swapper/208:22:592
33023599240,1cyclictest0-21swapper/207:49:592
4577091230,4ptp4l61490irq/134-eno1-TxRx-008:50:003
330230992315,2cyclictest171rcu_preempt07:10:020
330235992219,1cyclictest0-21swapper/211:06:592
330235991815,2cyclictest0-21swapper/212:17:592
330235991815,2cyclictest0-21swapper/212:17:592
330235991613,2cyclictest0-21swapper/209:12:002
330235991512,2cyclictest0-21swapper/207:52:582
3302359985,2cyclictest0-21swapper/211:44:312
3302359931,1cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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