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2026-05-18 - 03:42
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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 Mon May 18, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25176599138125,10cyclictest345091-40logrotate00:00:010
25176599114105,6cyclictest327086-21apt-get23:05:030
2517689910395,6cyclictest290434-21kworker/u8:2+events_unbound21:10:241
2517659910394,7cyclictest332120-21latency_hist23:20:010
2517659910394,7cyclictest332120-21latency_hist23:20:010
251768999988,8cyclictest298357-21latency_hist21:35:011
251768999984,12cyclictest1213033-21systemd-journal22:00:001
251765999783,12cyclictest348618-21apt-get00:10:000
251768999484,8cyclictest298593-21/usr/sbin/munin21:35:251
251768999386,5cyclictest306367-21kworker/u8:2+events_unbound22:35:121
251768999179,9cyclictest1213033-21systemd-journal22:10:011
251768999179,9cyclictest1213033-21systemd-journal22:10:001
251768999175,14cyclictest301529-21kworker/u8:1+flush-179:022:00:251
251768998984,4cyclictest332073-21kworker/u8:0+events_unbound23:20:261
251768998877,9cyclictest295437-21apt-get21:25:101
251768998781,4cyclictest324546-21kworker/u8:0+events_unbound22:55:191
251768998682,3cyclictest353679-21kworker/u8:2+flush-179:000:30:241
251768998679,5cyclictest248688-21kworker/u8:2+events_unbound19:15:261
251768998573,4cyclictest283753-21kworker/u8:1+events_unbound21:00:241
251765998567,16cyclictest333940-21/usr/sbin/munin23:25:230
251768998375,6cyclictest262857-21kworker/u8:3+flush-179:020:10:201
251768998373,7cyclictest311092-21latency_hist22:15:001
251768998273,6cyclictest282166-21kworker/u8:0+events_unbound20:45:231
251765998271,9cyclictest335835-21diskstats23:30:140
251765998170,8cyclictest262857-21kworker/u8:3+flush-179:019:55:220
251768998073,4cyclictest248688-21kworker/u8:2+events_unbound19:35:191
251768998073,4cyclictest248688-21kworker/u8:2+events_unbound19:35:191
251768997974,4cyclictest352025-21kworker/u8:1+flush-179:000:25:011
251768997971,7cyclictest314265-21kworker/u8:0+events_unbound22:25:211
251768997967,9cyclictest338474-21apt-get23:40:001
251768997967,9cyclictest338474-21apt-get23:40:001
251768997873,4cyclictest277643-21kworker/u8:3+flush-179:020:30:141
251765997872,5cyclictest335327-21kworker/u8:3+events_unbound00:04:010
251765997868,6cyclictest301529-21kworker/u8:1+flush-179:022:00:230
251768997769,5cyclictest353899-21apt-get00:25:111
251768997671,4cyclictest274468-21kworker/u8:1+flush-179:020:20:281
251768997671,4cyclictest262857-21kworker/u8:3+events_unbound20:05:241
251768997668,6cyclictest322251-21apt-get22:48:561
251765997666,6cyclictest272597-21kworker/u8:0+flush-179:020:20:010
251768997571,3cyclictest272597-21kworker/u8:0+events_unbound20:15:231
251768997570,4cyclictest282166-21kworker/u8:0+events_unbound20:55:131
251768997569,4cyclictest282166-21kworker/u8:0+events_unbound21:05:211
251768997469,4cyclictest248688-21kworker/u8:2+events_unbound19:40:231
251768997369,3cyclictest256690-21kworker/u8:1+events_unbound19:30:251
251768997368,4cyclictest324546-21kworker/u8:0+flush-179:023:00:251
251768997367,5cyclictest309551-21kworker/u8:3+events_unbound22:15:171
251768997367,4cyclictest340312-21kworker/u8:0+events_unbound00:05:141
251765997366,4cyclictest274468-21kworker/u8:1+flush-179:020:20:250
251768997267,4cyclictest322219-21kworker/u8:1+events_unbound23:15:181
251768997267,4cyclictest322219-21kworker/u8:1+events_unbound23:15:181
251768997265,6cyclictest348580-21kworker/u8:2+events_unbound00:10:021
251768997164,5cyclictest245631-21kworker/u8:0+events_unbound19:45:221
251768997066,3cyclictest296804-21kworker/u8:0+events_unbound21:45:001
251768997065,4cyclictest248688-21kworker/u8:2+flush-179:019:20:201
251768997062,5cyclictest282166-21kworker/u8:0+events_unbound21:15:231
251768997061,6cyclictest358419-21latency_hist00:40:011
251768997061,6cyclictest269191-21latency_hist20:05:021
251765997063,5cyclictest263079-21apt-get19:45:120
251768996964,3cyclictest277643-21kworker/u8:3+events_unbound20:35:151
251765996959,8cyclictest278993-21latency_hist20:35:010
251765996955,10cyclictest1213033-21systemd-journal20:30:010
251765996854,11cyclictest1213033-21systemd-journal21:00:000
251768996763,3cyclictest348580-21kworker/u8:2+flush-179:000:15:151
251768996763,2cyclictest714-21Xorg22:33:581
251768996760,5cyclictest335327-21kworker/u8:3+flush-179:023:55:201
251768996661,4cyclictest335327-21kworker/u8:3+flush-179:000:00:211
251768996660,4cyclictest1213033-21systemd-journal22:21:481
251768996658,6cyclictest340312-21kworker/u8:0+flush-179:023:50:151
251768996657,7cyclictest248688-21kworker/u8:2+events_unbound20:25:171
251765996644,20cyclictest1-21systemd00:13:280
251765996554,6cyclictest301529-21kworker/u8:1+flush-179:021:50:220
251765996455,6cyclictest301552-21latency_hist21:45:020
251765996454,8cyclictest290655-21apt-get21:10:120
251768996359,3cyclictest262857-21kworker/u8:3+flush-179:019:55:151
251768996258,3cyclictest335327-21kworker/u8:3+flush-179:023:45:281
251768996256,4cyclictest328701-21kworker/u8:3+events_unbound23:13:571
251765996251,7cyclictest283753-21kworker/u8:1+flush-179:020:50:220
251770996158,2cyclictest0-21swapper/222:33:582
251768996157,3cyclictest283753-21kworker/u8:1+events_unbound20:50:221
251768996055,4cyclictest306367-21kworker/u8:2+events_unbound22:40:161
251768996054,3cyclictest322219-21kworker/u8:1+events_unbound23:30:131
251770995956,2cyclictest0-21swapper/200:24:592
251768995954,4cyclictest277643-21kworker/u8:3+events_unbound20:40:261
251768995952,5cyclictest245631-21kworker/u8:0+flush-179:019:29:541
251765995949,7cyclictest282166-21kworker/u8:0+flush-179:021:04:590
251765995839,17cyclictest1213033-21systemd-journal23:52:570
251765995747,8cyclictest274468-21kworker/u8:1+flush-179:020:39:590
251765995740,12cyclictest1213033-21systemd-journal00:38:560
251765995651,3cyclictest335327-21kworker/u8:3+flush-179:023:45:250
251765995651,3cyclictest277643-21kworker/u8:3+events_unbound20:40:230
251768995550,4cyclictest262857-21kworker/u8:3+flush-179:019:54:551
251768995543,9cyclictest301807-21apt-get21:45:121
251765995549,4cyclictest248688-21kworker/u8:2+flush-179:019:55:000
251765995545,7cyclictest328701-21kworker/u8:3+flush-179:023:10:240
251765995541,12cyclictest269225-21http20:05:000
251768995449,4cyclictest324546-21kworker/u8:0+events_unbound23:05:231
251768995447,6cyclictest332073-21kworker/u8:0+events_unbound23:25:241
251765995445,7cyclictest306367-21kworker/u8:2+flush-179:022:30:240
251765995443,9cyclictest256709-21apt-get19:25:120
251765995442,9cyclictest252215-21diskstats19:10:150
251768995349,3cyclictest293035-21kworker/u8:1+events_unbound21:20:191
251765995347,5cyclictest290434-21kworker/u8:2+flush-179:021:15:250
251765995342,9cyclictest271290-21apt-get20:10:110
251765995246,5cyclictest332073-21kworker/u8:0+flush-179:023:20:170
251765995143,5cyclictest255123-21apt-get19:20:130
251768995040,8cyclictest322837-21diskstats22:50:151
251768995040,8cyclictest322837-21diskstats22:50:151
251765995040,7cyclictest295183-21latency_hist21:25:010
251765995029,19cyclictest322295-21latency_hist22:50:020
251765994937,9cyclictest269173-21kworker/u8:0+events_unbound20:05:030
251765994933,14cyclictest714-21Xorg22:56:590
4577091480,13ptp4l61490irq/134-eno1-TxRx-019:10:013
251765994741,4cyclictest353679-21kworker/u8:2+flush-179:000:30:230
251765994741,4cyclictest324546-21kworker/u8:0+flush-179:023:00:180
251765994740,5cyclictest1213033-21systemd-journal23:40:030
251765994740,5cyclictest1213033-21systemd-journal23:40:030
251765994736,9cyclictest340312-21kworker/u8:0+flush-179:000:20:000
251765994736,8cyclictest306367-21kworker/u8:2+events_unbound22:50:220
251765994736,8cyclictest306367-21kworker/u8:2+events_unbound22:50:220
251765994728,3cyclictest299942-21cron21:40:000
251765994640,4cyclictest308174-21apt-get22:05:110
251765994640,4cyclictest308174-21apt-get22:05:110
251765994639,5cyclictest293035-21kworker/u8:1+events_unbound21:25:140
251765994637,6cyclictest1213033-21systemd-journal19:31:560
251765994624,3cyclictest0-21swapper/000:25:130
251765994540,4cyclictest309551-21kworker/u8:3+flush-179:022:20:220
251765994536,7cyclictest294994-21kworker/u8:3+events_unbound21:30:230
251765994524,6cyclictest283774-21latency_hist20:50:020
251774994441,2cyclictest0-21swapper/322:31:003
251765994439,4cyclictest248688-21kworker/u8:2+flush-179:019:15:240
251765994439,3cyclictest262818-21cron19:45:000
251768994339,3cyclictest335327-21kworker/u8:3+events_unbound23:43:571
251768994339,3cyclictest335327-21kworker/u8:3+events_unbound23:43:571
251768994337,5cyclictest245631-21kworker/u8:0+events_unbound19:11:581
25176599430,42cyclictest0-21swapper/022:19:580
25176599430,42cyclictest0-21swapper/021:05:590
251770994239,2cyclictest0-21swapper/220:29:552
251765994134,6cyclictest315871-21cron22:29:590
251765994133,6cyclictest251645-21latency_hist19:10:020
251774994038,1cyclictest0-21swapper/319:40:593
251774994038,1cyclictest0-21swapper/319:19:563
251765994035,4cyclictest248688-21kworker/u8:2+flush-179:019:35:220
251765994035,4cyclictest248688-21kworker/u8:2+flush-179:019:35:220
251774993937,1cyclictest0-21swapper/321:44:003
251774993934,4cyclictest306342-21turbostat22:00:013
25177099390,36cyclictest0-21swapper/221:14:562
25177099380,35cyclictest0-21swapper/221:30:002
25177099380,35cyclictest0-21swapper/220:24:562
251768993834,2cyclictest714-21Xorg21:50:591
251765993833,3cyclictest306363-21systemd-run22:00:010
251774993735,1cyclictest0-21swapper/300:01:003
251774993734,2cyclictest0-21swapper/322:54:593
251774993734,2cyclictest0-21swapper/322:54:593
251770993734,2cyclictest0-21swapper/221:47:002
25177099370,35cyclictest0-21swapper/200:33:592
251774993634,1cyclictest0-21swapper/323:39:553
251774993634,1cyclictest0-21swapper/323:39:553
251774993634,1cyclictest0-21swapper/323:34:593
25177499360,35cyclictest0-21swapper/321:21:593
25177499360,1cyclictest0-21swapper/319:49:593
251770993633,2cyclictest0-21swapper/223:44:552
251770993633,2cyclictest0-21swapper/223:44:552
251770993633,2cyclictest0-21swapper/223:40:002
251770993633,2cyclictest0-21swapper/223:40:002
251765993627,7cyclictest306367-21kworker/u8:2+flush-179:022:10:230
251774993533,1cyclictest0-21swapper/322:58:593
251774993533,1cyclictest0-21swapper/322:04:563
251774993533,1cyclictest0-21swapper/321:28:003
251774993533,1cyclictest0-21swapper/300:26:593
251770993533,1cyclictest0-21swapper/222:29:592
251770993532,2cyclictest0-21swapper/219:15:592
251770993531,2cyclictest0-21swapper/222:37:002
251765993533,1cyclictest301529-21kworker/u8:1+flush-179:021:45:260
251765993527,5cyclictest352312-21apt00:20:130
251774993432,1cyclictest0-21swapper/323:26:593
251770993432,1cyclictest0-21swapper/221:34:592
251770993431,2cyclictest0-21swapper/223:11:592
251770993431,2cyclictest0-21swapper/219:56:592
251770993431,2cyclictest0-21swapper/200:40:002
251770993430,2cyclictest0-21swapper/220:45:012
25177099340,2cyclictest0-21swapper/222:07:592
25177099340,2cyclictest0-21swapper/222:07:582
251765993429,4cyclictest319086-21turbostat22:44:550
251774993331,1cyclictest0-21swapper/323:09:553
251774993331,1cyclictest0-21swapper/320:17:003
251774993331,1cyclictest0-21swapper/319:11:593
251770993330,2cyclictest0-21swapper/221:38:582
251765993324,7cyclictest335327-21kworker/u8:3+events_unbound23:35:230
251765993324,7cyclictest335327-21kworker/u8:3+events_unbound23:35:230
251774993230,1cyclictest0-21swapper/320:26:593
251774993230,1cyclictest0-21swapper/320:04:553
251770993229,2cyclictest0-21swapper/221:50:582
251770993128,2cyclictest0-21swapper/222:47:592
251770993128,2cyclictest0-21swapper/221:55:592
251770993128,2cyclictest0-21swapper/219:31:592
25177099310,29cyclictest0-21swapper/200:10:132
251774993026,3cyclictest0-21swapper/321:50:143
25177499300,2cyclictest0-21swapper/300:05:133
25177499300,1cyclictest0-21swapper/322:48:583
251770993027,2cyclictest0-21swapper/222:54:002
251770993027,2cyclictest0-21swapper/222:53:592
251770993027,2cyclictest0-21swapper/221:45:002
251770993027,2cyclictest0-21swapper/200:08:582
25177099300,2cyclictest0-21swapper/223:55:122
25177099300,2cyclictest0-21swapper/219:25:132
25177099300,28cyclictest0-21swapper/219:38:592
25177099300,28cyclictest0-21swapper/219:38:582
4577091290,7ptp4l441ktimers/323:15:013
4577091290,7ptp4l441ktimers/322:10:003
4577091290,7ptp4l441ktimers/322:10:003
251774992927,1cyclictest0-21swapper/322:44:593
251774992927,1cyclictest0-21swapper/320:12:593
251774992927,1cyclictest0-21swapper/319:23:593
251774992927,1cyclictest0-21swapper/300:34:593
251774992926,2cyclictest0-21swapper/300:00:023
25177499290,27cyclictest0-21swapper/321:45:133
251770992926,2cyclictest0-21swapper/220:03:002
251770992926,2cyclictest0-21swapper/219:20:132
25177099290,27cyclictest0-21swapper/223:21:002
25177099290,27cyclictest0-21swapper/220:35:142
25177099290,27cyclictest0-21swapper/220:30:592
25177099290,26cyclictest0-21swapper/200:00:032
25177099290,25cyclictest0-21swapper/223:00:002
4577091280,6ptp4l61490irq/134-eno1-TxRx-021:15:003
4577091280,6ptp4l441ktimers/321:40:003
251774992825,2cyclictest0-21swapper/300:10:013
25177499280,27cyclictest0-21swapper/322:15:143
25177499280,27cyclictest0-21swapper/321:05:153
25177499280,26cyclictest0-21swapper/323:40:123
25177499280,26cyclictest0-21swapper/323:40:123
25177499280,26cyclictest0-21swapper/321:00:023
25177499280,26cyclictest0-21swapper/320:30:143
251770992825,2cyclictest0-21swapper/223:29:592
251770992825,2cyclictest0-21swapper/221:00:592
25177099280,2cyclictest0-21swapper/221:20:582
25177099280,27cyclictest0-21swapper/223:05:012
25177099280,24cyclictest0-21swapper/219:52:582
25176599280,21cyclictest211irq_work/022:37:590
4577091270,6ptp4l61490irq/134-eno1-TxRx-021:20:003
4577091270,6ptp4l441ktimers/320:50:013
4577091270,6ptp4l441ktimers/320:40:013
4577091270,4ptp4l441ktimers/319:35:003
251774992725,1cyclictest0-21swapper/322:39:553
251774992725,1cyclictest0-21swapper/320:20:143
251774992725,1cyclictest0-21swapper/319:27:593
25177499270,26cyclictest0-21swapper/321:32:593
25177499270,1cyclictest0-21swapper/320:05:033
251770992724,2cyclictest0-21swapper/223:02:582
251770992724,2cyclictest0-21swapper/200:16:592
4577091260,6ptp4l61490irq/134-eno1-TxRx-023:05:013
4577091260,6ptp4l61490irq/134-eno1-TxRx-000:39:553
4577091260,5ptp4l61490irq/134-eno1-TxRx-023:25:003
4577091260,5ptp4l441ktimers/323:49:553
4577091260,5ptp4l441ktimers/320:45:003
4577091260,5ptp4l441ktimers/320:00:023
4577091260,5ptp4l441ktimers/319:39:563
4577091260,5ptp4l441ktimers/319:39:563
4577091260,4ptp4l441ktimers/300:24:563
251774992624,1cyclictest0-21swapper/320:54:563
25177499260,25cyclictest0-21swapper/322:10:143
251770992623,2cyclictest0-21swapper/223:53:592
251770992623,2cyclictest0-21swapper/222:24:592
25177099260,24cyclictest0-21swapper/219:13:592
4577091250,5ptp4l61490irq/134-eno1-TxRx-022:30:003
4577091250,5ptp4l441ktimers/323:54:553
251774992523,1cyclictest0-21swapper/323:16:003
251774992523,1cyclictest0-21swapper/323:15:593
251774992523,1cyclictest0-21swapper/320:56:583
251770992522,2cyclictest0-21swapper/222:40:592
25177099250,2cyclictest0-21swapper/220:05:042
4577091240,4ptp4l441ktimers/300:19:553
251770992421,2cyclictest0-21swapper/223:18:592
251770992421,2cyclictest0-21swapper/223:18:592
251770992421,2cyclictest0-21swapper/220:19:002
251770992220,1cyclictest0-21swapper/219:44:592
251770992219,2cyclictest0-21swapper/222:12:592
251770992219,2cyclictest0-21swapper/219:45:142
251774992119,1cyclictest0-21swapper/319:54:593
251770992118,2cyclictest0-21swapper/222:00:592
251770992117,2cyclictest0-21swapper/223:34:552
251770992017,2cyclictest0-21swapper/220:14:582
251768992016,3cyclictest0-21swapper/119:10:011
251770991815,2cyclictest0-21swapper/222:17:002
251770991714,2cyclictest0-21swapper/223:47:592
251770991714,2cyclictest0-21swapper/200:26:582
4577091140,3ptp4l441ktimers/322:20:153
251770991411,2cyclictest0-21swapper/220:45:592
251770991311,1cyclictest0-21swapper/221:19:592
25177099118,2cyclictest0-21swapper/220:59:002
2517709985,2cyclictest0-21swapper/220:51:592
2517709970,6cyclictest0-21swapper/221:07:052
2517709930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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