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2026-09-10 - 18:27
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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 Thu Sep 10, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
383893299153143,7cyclictest3934667-21latency_hist12:05:010
383893499151140,8cyclictest3862781-21latency_hist08:25:001
383893499141131,7cyclictest3883983-21latency_hist09:30:011
383893499134117,12cyclictest1213033-21systemd-journal07:40:001
383893499133122,7cyclictest3888851-21kworker/u8:3+flush-179:010:00:001
383893499128109,14cyclictest3913735-21apt-get11:00:011
383893499128109,14cyclictest3913735-21apt-get11:00:011
383893299126116,7cyclictest3875773-21latency_hist09:05:020
383893299125113,9cyclictest3939437-21latency_hist12:20:010
383893499124107,13cyclictest3895438-21latency_hist10:05:011
383893299121114,5cyclictest3870982-21kworker/u8:3+flush-179:008:55:150
383893299120114,5cyclictest3905472-21kworker/u8:1+flush-179:010:55:010
383893499119108,8cyclictest3897796-21apt-get10:10:101
383893299119106,10cyclictest3859845-21apt-get08:15:110
383893299119106,10cyclictest3859845-21apt-get08:15:110
383893299116110,4cyclictest3899171-21kworker/u8:3+flush-179:011:50:160
383893499115101,11cyclictest1213033-21systemd-journal07:45:011
383893499112100,8cyclictest3859588-21latency_hist08:15:021
38389329911193,16cyclictest3908926-21/usr/sbin/munin10:45:230
383893299111105,5cyclictest3862816-21kworker/u8:1+flush-179:008:35:010
38389349911092,15cyclictest3867520-21kworker/u8:2+flush-179:008:55:001
38389349910999,7cyclictest3861193-21latency_hist08:20:021
38389349910999,7cyclictest3861193-21latency_hist08:20:011
38389329910899,6cyclictest3882397-21latency_hist09:25:010
38389329910797,7cyclictest3864368-21latency_hist08:30:000
38389349910688,15cyclictest3878990-21kworker/u8:1+flush-179:009:20:201
38389329910688,15cyclictest3923520-21latency_hist11:30:010
38389349910394,7cyclictest3888851-21kworker/u8:3+flush-179:009:55:001
38389349910394,7cyclictest3888851-21kworker/u8:3+flush-179:009:55:001
38389349910393,7cyclictest3945814-21latency_hist12:40:011
38389349910392,9cyclictest3869274-21gpgv08:45:021
38389349910269,21cyclictest510-21rs:main1
38389329910296,4cyclictest3848403-21kworker/u8:0+flush-179:007:45:260
38389329910190,8cyclictest3892245-21latency_hist09:55:000
38389329910190,8cyclictest3892245-21latency_hist09:55:000
38389349910093,5cyclictest3854786-21kworker/u8:1+flush-179:008:05:211
38389329910094,5cyclictest3870982-21kworker/u8:3+flush-179:009:05:250
38389329910093,5cyclictest3942605-21kworker/u8:0+events_unbound12:30:230
38389329910093,5cyclictest3820941-21kworker/u8:3+flush-179:007:15:210
38389329910090,8cyclictest3897292-21apt-get10:10:000
3838932999992,5cyclictest3899171-21kworker/u8:3+flush-179:012:10:150
3838934999884,10cyclictest1213033-21systemd-journal08:30:171
3838934999790,5cyclictest3878990-21kworker/u8:1+events_unbound10:20:241
3838932999789,6cyclictest3843702-21kworker/u8:1+flush-179:007:30:160
3838934999682,10cyclictest3936914-21kworker/u8:4+flush-179:012:20:201
3838932999690,4cyclictest3936914-21kworker/u8:4+flush-179:012:35:170
3838932999484,7cyclictest3931726-21apt-get11:55:110
3838934999381,9cyclictest3870993-21latency_hist08:50:001
3838934999381,9cyclictest1213033-21systemd-journal12:20:001
3838934999281,7cyclictest3820941-21kworker/u8:3+flush-179:007:10:221
3838932999282,8cyclictest3843667-21latency_hist07:25:010
3838932999280,8cyclictest1213033-21systemd-journal09:15:000
3838934999179,8cyclictest3878990-21kworker/u8:1+flush-179:009:35:131
3838932999179,10cyclictest3920604-21apt-get11:20:100
3838932999084,4cyclictest3878990-21kworker/u8:1+flush-179:009:40:160
3838932998981,5cyclictest3921912-21kworker/u8:0+flush-179:011:35:200
3838932998880,6cyclictest1213033-21systemd-journal12:30:000
3838934998779,5cyclictest3870982-21kworker/u8:3+flush-179:009:05:161
3838932998780,5cyclictest510-21rs:main0
3838932998661,6cyclictest3850054-21latency_hist07:45:000
3838934998576,6cyclictest3897283-21latency_hist10:10:011
3838934998553,21cyclictest3866209-21apt-get08:35:111
3838932998580,4cyclictest3899171-21kworker/u8:3+flush-179:011:05:210
3838932998575,7cyclictest3820941-21kworker/u8:3+flush-179:007:50:150
3838934998476,5cyclictest3936252-21latency_hist12:10:001
3838934998475,6cyclictest3837388-21kworker/u8:2+flush-179:007:15:241
3838932998476,5cyclictest3899171-21kworker/u8:3+flush-179:011:05:010
3838932998473,8cyclictest3820941-21kworker/u8:3+events_unbound08:10:190
3838934998267,12cyclictest1213033-21systemd-journal11:22:171
3838932998276,4cyclictest3820941-21kworker/u8:3+flush-179:008:00:270
3838932998271,8cyclictest3894107-21apt-get10:00:110
3838934998174,5cyclictest3926748-21kworker/u8:1+flush-179:011:40:151
3838932998176,4cyclictest3820941-21kworker/u8:3+events_unbound07:35:230
3838932998174,4cyclictest3878990-21kworker/u8:1+flush-179:009:35:180
3838934998072,6cyclictest3942855-21/usr/sbin/munin12:30:231
3838932998069,9cyclictest3918996-21apt-get11:15:120
3838934997868,7cyclictest3907646-21diskstats10:40:141
3838934997866,9cyclictest1213033-21systemd-journal11:25:171
3838934997767,7cyclictest1213033-21systemd-journal10:30:001
3838934997766,9cyclictest3917410-21apt-get11:10:141
3838932997770,5cyclictest3899171-21kworker/u8:3+flush-179:010:35:230
3838934997664,9cyclictest3937837-21latency_hist12:15:021
3838934997663,10cyclictest3837388-21kworker/u8:2+flush-179:007:25:191
3838932997665,7cyclictest3869147-21latency_hist08:45:010
3838932997569,4cyclictest3899171-21kworker/u8:3+flush-179:011:45:210
3838932997569,4cyclictest3837388-21kworker/u8:2+events_unbound07:10:200
3838932997568,5cyclictest3895933-21kworker/u8:0+flush-179:010:10:150
3838934997465,7cyclictest3885623-21latency_hist09:35:001
3838934997463,7cyclictest3848403-21kworker/u8:0+flush-179:007:45:151
3838934997462,9cyclictest1213033-21systemd-journal11:10:001
3838932997469,4cyclictest3936914-21kworker/u8:4+events_unbound12:20:150
3838932997468,4cyclictest3878990-21kworker/u8:1+flush-179:009:55:220
3838932997467,4cyclictest3905472-21kworker/u8:1+flush-179:010:40:150
3838932997365,7cyclictest3878990-21kworker/u8:1+events_unbound10:15:230
3838934997262,7cyclictest3842337-21apt-get07:20:121
3838932997266,4cyclictest3878990-21kworker/u8:1+flush-179:010:20:210
3838932997264,6cyclictest3870982-21kworker/u8:3+flush-179:008:50:140
3838934997164,5cyclictest3933063-21latency_hist12:00:011
3838934997162,7cyclictest3933334-21apt-get12:00:121
3838934997150,18cyclictest3880544-21apt-get09:20:001
3838932997163,5cyclictest3926748-21kworker/u8:1+flush-179:011:40:200
3838938997064,4cyclictest3877367-21turbostat09:10:003
3838934996960,7cyclictest3928557-21apt-get11:45:111
3838932996959,8cyclictest3912354-21/usr/sbin/munin10:55:230
3838932996959,8cyclictest3912354-21/usr/sbin/munin10:55:230
3838934996863,4cyclictest3878990-21kworker/u8:1+flush-179:009:40:201
3838934996754,10cyclictest1213033-21systemd-journal10:45:181
3838932996757,7cyclictest3854813-21latency_hist08:00:000
3838934996659,5cyclictest3890528-21gpgv09:50:021
3838932996659,4cyclictest3907139-21kworker/u8:0+flush-179:011:10:170
3838932996658,6cyclictest3837388-21kworker/u8:2+flush-179:007:25:200
3838932996559,4cyclictest3921912-21kworker/u8:0+flush-179:012:05:220
3838932996558,5cyclictest3899171-21kworker/u8:3+flush-179:010:30:140
3838932996555,5cyclictest3862816-21kworker/u8:1+flush-179:008:35:230
3838934996354,7cyclictest1213033-21systemd-journal10:40:011
3838934996352,9cyclictest3874440-21apt-get09:00:111
3838937996258,3cyclictest0-21swapper/211:56:592
3838932996255,5cyclictest3870982-21kworker/u8:3+flush-179:009:30:230
3838932996253,6cyclictest3865181-21kworker/u8:0+flush-179:008:45:210
3838938996058,1cyclictest0-21swapper/311:56:583
3838938996058,1cyclictest0-21swapper/310:32:593
3838937996057,2cyclictest0-21swapper/210:32:592
3838932996051,5cyclictest3895933-21kworker/u8:0+events_unbound10:25:240
3838934995846,11cyclictest3848403-21kworker/u8:0+flush-179:007:55:001
3838932995849,7cyclictest3820941-21kworker/u8:3+events_unbound08:20:140
3838934995750,5cyclictest3905472-21kworker/u8:1+flush-179:010:50:261
3838932995751,5cyclictest3899171-21kworker/u8:3+flush-179:011:30:280
3838932995750,6cyclictest3870982-21kworker/u8:3+flush-179:009:25:230
3838934995649,5cyclictest3838842-21latency_hist07:10:021
3838934995545,8cyclictest3878990-21kworker/u8:1+flush-179:010:15:211
3838934995447,5cyclictest3870982-21kworker/u8:3+events_unbound08:55:181
3838934995447,5cyclictest3856421-21latency_hist08:05:001
3838934995446,5cyclictest3899171-21kworker/u8:3+events_unbound11:30:181
3838934995446,5cyclictest1213033-21systemd-journal08:26:171
3838934995346,6cyclictest3820941-21kworker/u8:3+flush-179:007:55:161
3838934995249,2cyclictest714-21Xorg10:32:591
3838934995245,5cyclictest3865181-21kworker/u8:0+events_unbound09:10:181
3838934995142,7cyclictest3941288-21apt-get12:25:121
4577091480,13ptp4l441ktimers/307:09:563
3838937994541,2cyclictest0-21swapper/211:00:592
3838932994539,4cyclictest3888851-21kworker/u8:3+events_unbound09:50:010
3838938994341,1cyclictest0-21swapper/311:00:593
383893899420,41cyclictest0-21swapper/309:40:003
3838937994237,2cyclictest0-21swapper/210:28:592
383893799410,39cyclictest0-21swapper/209:39:592
3838934994121,18cyclictest3919839-21phc2sys-jitter11:15:221
3838934994022,17cyclictest3926751-21sh11:40:011
3838938993937,1cyclictest0-21swapper/310:29:003
3838938993936,2cyclictest0-21swapper/311:00:003
3838938993936,2cyclictest0-21swapper/311:00:003
383893799390,36cyclictest0-21swapper/212:30:592
383893799390,36cyclictest0-21swapper/209:49:592
383893799390,36cyclictest0-21swapper/208:11:582
3838934993934,2cyclictest0-21swapper/111:00:591
383893299390,2cyclictest714-21Xorg08:09:580
383893899380,37cyclictest0-21swapper/309:28:593
3838937993834,2cyclictest0-21swapper/212:14:562
3838937993834,2cyclictest0-21swapper/210:01:592
383893799380,35cyclictest0-21swapper/209:28:592
3838934993832,4cyclictest3899171-21kworker/u8:3+flush-179:011:50:251
3838938993734,2cyclictest0-21swapper/310:01:593
3838938993732,3cyclictest0-21swapper/308:31:003
383893899370,1cyclictest0-21swapper/309:49:593
3838937993735,1cyclictest0-21swapper/211:00:002
3838937993735,1cyclictest0-21swapper/211:00:002
3838937993734,2cyclictest0-21swapper/207:42:582
3838937993730,6cyclictest0-21swapper/209:30:592
383893799370,34cyclictest0-21swapper/207:13:582
383893799370,1cyclictest0-21swapper/209:04:552
3838938993634,1cyclictest0-21swapper/307:42:583
3838938993633,2cyclictest0-21swapper/312:14:553
3838938993633,2cyclictest0-21swapper/310:17:593
3838938993630,4cyclictest0-21swapper/309:30:593
383893899360,35cyclictest0-21swapper/312:30:593
383893899360,1cyclictest0-21swapper/308:11:583
3838937993632,3cyclictest0-21swapper/208:58:582
3838937993632,2cyclictest0-21swapper/210:51:592
3838937993632,2cyclictest0-21swapper/210:17:592
3838937993632,2cyclictest0-21swapper/208:30:592
3838937993632,2cyclictest0-21swapper/208:08:002
3838937993631,3cyclictest0-21swapper/211:14:542
3838938993533,1cyclictest0-21swapper/308:29:543
3838938993532,2cyclictest0-21swapper/310:51:593
3838938993532,2cyclictest0-21swapper/308:58:583
3838938993529,4cyclictest3867573-21turbostat08:40:003
3838938993526,7cyclictest3853232-21turbostat07:55:003
383893899350,1cyclictest0-21swapper/309:04:563
3838937993532,2cyclictest0-21swapper/208:29:542
3838937993531,2cyclictest0-21swapper/209:13:582
383893799350,1cyclictest0-21swapper/210:09:592
3838938993432,1cyclictest0-21swapper/309:13:583
3838938993432,1cyclictest0-21swapper/308:07:593
3838938993431,2cyclictest0-21swapper/311:38:583
3838938993431,2cyclictest0-21swapper/311:14:553
383893899340,33cyclictest0-21swapper/307:13:593
3838937993430,3cyclictest0-21swapper/211:38:592
3838937993430,2cyclictest0-21swapper/210:23:592
383893799340,31cyclictest0-21swapper/212:39:552
3838938993329,2cyclictest0-21swapper/310:23:583
3838937993330,2cyclictest0-21swapper/208:40:012
3838938993228,3cyclictest3845268-21turbostat07:30:013
3838938993225,5cyclictest3843674-21turbostat07:25:003
3838937993227,2cyclictest0-21swapper/211:46:592
3838937993221,7cyclictest0-21swapper/207:39:552
3838938993128,2cyclictest0-21swapper/311:46:593
3838938993128,2cyclictest0-21swapper/311:34:593
3838938993128,2cyclictest0-21swapper/307:39:583
383893899310,1cyclictest0-21swapper/312:39:563
3838937993128,2cyclictest0-21swapper/212:08:592
3838937993127,2cyclictest0-21swapper/211:34:592
3838937993126,2cyclictest0-21swapper/208:24:002
3838938993028,1cyclictest0-21swapper/312:08:593
3838938993028,1cyclictest0-21swapper/309:15:133
3838937993027,2cyclictest0-21swapper/209:15:132
3838937993027,2cyclictest0-21swapper/207:30:002
3838937993026,2cyclictest0-21swapper/207:23:002
383893799300,2cyclictest0-21swapper/211:05:122
383893799300,28cyclictest0-21swapper/209:20:122
383893799300,28cyclictest0-21swapper/208:45:022
4577091290,6ptp4l441ktimers/307:20:013
3838938992927,1cyclictest0-21swapper/308:23:593
3838938992926,2cyclictest0-21swapper/312:15:113
383893899290,27cyclictest0-21swapper/309:42:583
383893899290,27cyclictest0-21swapper/309:20:123
383893899290,1cyclictest0-21swapper/308:45:033
3838937992926,2cyclictest0-21swapper/209:50:122
3838937992926,2cyclictest0-21swapper/209:50:122
383893799290,28cyclictest0-21swapper/210:10:022
383893799290,27cyclictest0-21swapper/212:15:102
383893799290,27cyclictest0-21swapper/212:00:122
383893799290,27cyclictest0-21swapper/211:50:132
383893799290,27cyclictest0-21swapper/211:20:122
383893799290,27cyclictest0-21swapper/207:58:582
4577091280,7ptp4l61490irq/134-eno1-TxRx-010:45:003
4577091280,6ptp4l441ktimers/312:30:003
4577091280,6ptp4l441ktimers/310:50:003
4577091280,6ptp4l441ktimers/310:10:003
4577091280,6ptp4l441ktimers/308:45:003
3838938992826,1cyclictest0-21swapper/309:50:123
3838938992826,1cyclictest0-21swapper/309:50:123
383893899280,26cyclictest0-21swapper/312:00:133
383893899280,26cyclictest0-21swapper/311:50:133
383893899280,26cyclictest0-21swapper/311:20:113
383893899280,26cyclictest0-21swapper/310:10:023
383893899280,1cyclictest0-21swapper/311:25:123
383893899280,1cyclictest0-21swapper/311:05:113
383893799280,2cyclictest0-21swapper/211:25:112
383893799280,26cyclictest0-21swapper/209:57:592
383893799280,25cyclictest0-21swapper/209:42:592
4577091270,6ptp4l441ktimers/307:50:013
3838938992724,2cyclictest0-21swapper/307:55:583
3838938992723,2cyclictest0-21swapper/309:57:593
3838937992724,2cyclictest0-21swapper/210:44:002
3838937992722,2cyclictest0-21swapper/211:18:592
383893799270,25cyclictest0-21swapper/212:22:592
383893799270,25cyclictest0-21swapper/210:46:592
383893799270,25cyclictest0-21swapper/207:34:002
4577091260,6ptp4l441ktimers/310:40:013
4577091260,5ptp4l441ktimers/308:54:543
3838938992624,1cyclictest0-21swapper/308:01:003
3838938992623,2cyclictest0-21swapper/311:18:593
3838937992623,2cyclictest0-21swapper/208:18:592
3838937992623,2cyclictest0-21swapper/208:18:592
3838937992623,2cyclictest0-21swapper/208:00:592
4577091250,5ptp4l441ktimers/311:44:563
3838938992523,1cyclictest0-21swapper/308:19:003
3838938992523,1cyclictest0-21swapper/308:18:593
3838938992521,2cyclictest0-21swapper/312:21:593
383893899250,24cyclictest0-21swapper/307:34:003
3838937992522,2cyclictest0-21swapper/212:25:142
383893799250,2cyclictest0-21swapper/209:06:592
3838937992220,1cyclictest0-21swapper/211:45:002
3838932992117,3cyclictest3838974-21latency_hist07:10:000
3838937992018,1cyclictest0-21swapper/207:49:592
3838937991916,2cyclictest0-21swapper/208:42:582
3838937991814,2cyclictest0-21swapper/210:38:592
3838937991715,1cyclictest0-21swapper/207:20:012
3838937991411,2cyclictest0-21swapper/207:51:002
3838937991410,2cyclictest0-21swapper/208:52:002
38389379930,2cyclictest0-21swapper/207:10:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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