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2026-03-19 - 17:01
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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 Mar 19, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
348108499119108,7cyclictest3497174-21latency_hist08:00:010
34810869911590,22cyclictest3498781-21latency_hist08:05:011
34810849911394,16cyclictest3514940-21latency_hist08:55:010
348108499110100,7cyclictest3506858-21gpgv08:30:010
3481086999081,6cyclictest3562944-21latency_hist11:25:011
3481084998778,5cyclictest3484146-21kworker/u8:0+flush-179:007:40:220
3481086998678,6cyclictest3548612-21latency_hist10:40:021
3481086998559,23cyclictest3566117-21latency_hist11:35:021
3481086998169,10cyclictest266-21systemd-journal07:20:001
3481084998172,7cyclictest3500602-21/usr/sbin/munin08:10:230
3481084998171,7cyclictest3567985-21latency_hist11:40:020
3481084998171,7cyclictest3567985-21latency_hist11:40:010
3481086997970,6cyclictest3513389-21kworker/u8:2+flush-179:009:00:231
3481086997968,9cyclictest266-21systemd-journal09:50:011
3481084997968,8cyclictest3521543-21/usr/sbin/munin09:15:230
3481084997871,5cyclictest3532692-21kworker/u8:0+flush-179:010:10:010
3481084997868,7cyclictest3524499-21latency_hist09:25:000
3481084997668,5cyclictest3548667-21kworker/u8:1+flush-179:010:55:210
3481084997667,7cyclictest3527977-21kworker/u8:3+flush-179:009:50:240
3481086997264,6cyclictest3497430-21kworker/u8:1+flush-179:008:25:201
3481086997263,7cyclictest3524535-21kworker/u8:2+events_unbound09:30:021
3481084997265,5cyclictest3510152-21kworker/u8:2+flush-179:008:40:230
3481084997238,32cyclictest0-21swapper/008:21:000
3481084997238,32cyclictest0-21swapper/008:21:000
3481086997138,32cyclictest714-21Xorg08:21:001
3481086997138,32cyclictest714-21Xorg08:21:001
3481086996957,10cyclictest266-21systemd-journal12:05:011
3481086996957,10cyclictest266-21systemd-journal12:05:001
3481084996963,5cyclictest3567938-21kworker/u8:1+flush-179:011:45:000
3481086996857,5cyclictest3497430-21kworker/u8:1+events_unbound08:30:021
348108499681,64cyclictest1-21systemd09:50:010
3481086996761,4cyclictest3531124-21latency_hist09:45:011
3481086996761,4cyclictest3492400-21kworker/u8:2+flush-179:007:50:231
3481084996759,6cyclictest3553385-21latency_hist10:55:010
3481086996657,7cyclictest3577549-21kworker/u8:0+events_unbound12:30:001
3481086996555,8cyclictest3518391-21apt-get09:05:131
3481086996554,9cyclictest3580950-21/usr/sbin/munin12:20:211
3481086996445,18cyclictest3556014-21kworker/u8:2+flush-179:011:14:551
3481084996355,6cyclictest3560004-21apt-get11:15:110
3481084996355,5cyclictest3499359-21kworker/u8:0+flush-179:008:05:230
3481086996257,3cyclictest3532744-21kworker/u8:2+flush-179:010:15:141
3481086996254,5cyclictest3497430-21kworker/u8:1+flush-179:008:35:221
3481086996155,5cyclictest3527391-21kworker/u8:1+flush-179:009:35:221
3481084996150,9cyclictest3571410-21apt-get11:50:100
3481086996053,5cyclictest3537533-21kworker/u8:3+flush-179:010:45:231
3481092995956,2cyclictest0-21swapper/307:25:003
3481084995953,5cyclictest3558147-21kworker/u8:1+events_unbound11:10:220
3481084995953,5cyclictest3537533-21kworker/u8:3+flush-179:010:29:560
3481084995953,5cyclictest3537533-21kworker/u8:3+flush-179:010:20:230
3481084995953,4cyclictest3567938-21kworker/u8:1+flush-179:012:15:200
3481084995952,5cyclictest3537533-21kworker/u8:3+flush-179:010:45:210
3481086995850,6cyclictest266-21systemd-journal10:24:371
3481084995850,6cyclictest3562237-21kworker/u8:0+events_unbound11:25:230
3481086995749,6cyclictest3532744-21kworker/u8:2+flush-179:009:55:001
3481084995750,6cyclictest266-21systemd-journal11:09:370
3481084995749,6cyclictest3577549-21kworker/u8:0+flush-179:012:35:240
3481086995645,8cyclictest3485768-21latency_hist07:25:011
3481084995650,5cyclictest3497430-21kworker/u8:1+flush-179:008:30:220
3481084995649,5cyclictest3527391-21kworker/u8:1+flush-179:009:30:240
3481086995546,7cyclictest3537533-21kworker/u8:3+flush-179:010:40:231
3481084995447,5cyclictest3524738-21/usr/sbin/munin09:25:230
3481086995346,5cyclictest3558163-21latency_hist11:10:011
3481086995345,6cyclictest3574328-21latency_hist12:00:011
3481086995246,5cyclictest3521346-21kworker/u8:3+flush-179:009:20:221
3481086995245,5cyclictest3534550-21apt-get09:55:091
3481086995241,9cyclictest266-21systemd-journal09:19:591
3481084995246,5cyclictest3513389-21kworker/u8:2+events_unbound09:00:210
3481086995146,4cyclictest3571198-21kworker/u8:2+flush-179:012:05:211
3481086995143,5cyclictest3466704-21kworker/u8:1+flush-179:007:10:231
3481084995146,4cyclictest3532744-21kworker/u8:2+flush-179:010:00:260
3481084995146,4cyclictest3489178-21kworker/u8:1+flush-179:007:35:210
3481084995145,5cyclictest3537533-21kworker/u8:3+flush-179:010:15:230
3481084995145,5cyclictest3478007-21kworker/u8:2+events_unbound07:25:250
3481084995142,6cyclictest3482574-21latency_hist07:15:010
3481086995045,4cyclictest3532692-21kworker/u8:0+flush-179:010:10:211
3481086995045,4cyclictest3492454-21kworker/u8:3+flush-179:007:55:231
3481084995044,5cyclictest3567938-21kworker/u8:1+flush-179:011:45:240
3481086994941,6cyclictest3579340-21/usr/sbin/munin12:15:211
3481084994944,4cyclictest3527391-21kworker/u8:1+events_unbound09:40:150
3481084994944,4cyclictest3478007-21kworker/u8:2+flush-179:007:20:000
3481084994943,5cyclictest3478007-21kworker/u8:2+flush-179:007:30:230
3481084994943,5cyclictest3478007-21kworker/u8:2+flush-179:007:30:230
4577091480,13ptp4l441ktimers/307:10:013
3481086994843,4cyclictest3567938-21kworker/u8:1+events_unbound12:30:221
3481086994740,5cyclictest3532744-21kworker/u8:2+flush-179:010:25:231
3481086994739,6cyclictest3555229-21/usr/sbin/munin11:00:211
3481084994738,7cyclictest3532744-21kworker/u8:2+events_unbound10:30:190
3481092994639,5cyclictest3522913-21turbostat09:20:003
3481086994640,4cyclictest3489178-21kworker/u8:1+events_unbound07:39:591
3481084994640,5cyclictest3497430-21kworker/u8:1+flush-179:008:45:220
3481084994640,5cyclictest3497430-21kworker/u8:1+flush-179:008:45:220
3481086994540,4cyclictest3484146-21kworker/u8:0+flush-179:007:40:261
3481086994540,4cyclictest3478007-21kworker/u8:2+flush-179:007:25:221
3481084994540,4cyclictest3520359-21kworker/u8:0+events_unbound09:10:230
3481084994437,5cyclictest3497430-21kworker/u8:1+flush-179:008:15:180
3481086994337,5cyclictest3562237-21kworker/u8:0+flush-179:011:25:211
3481086994337,4cyclictest3501934-21kworker/u8:2+flush-179:008:20:011
3481086994335,6cyclictest266-21systemd-journal11:19:591
3481084994338,4cyclictest3567938-21kworker/u8:1+events_unbound12:10:220
3481086994237,4cyclictest484-21dbus-daemon10:10:001
3481086994237,4cyclictest3567938-21kworker/u8:1+events_unbound11:50:231
3481086994236,4cyclictest266-21systemd-journal11:45:551
3481086994232,8cyclictest266-21systemd-journal08:49:561
3481086994232,8cyclictest266-21systemd-journal08:49:561
3481084994238,3cyclictest3577554-21systemd-run12:10:000
3481084994235,6cyclictest3532744-21kworker/u8:2+events_unbound10:00:000
348108499421,38cyclictest714-21Xorg12:30:590
3481090994138,2cyclictest0-21swapper/207:43:592
3481086994131,8cyclictest3547022-21latency_hist10:35:001
348108699410,4cyclictest3513365-21turbostat08:54:561
3481084994135,5cyclictest3492400-21kworker/u8:2+flush-179:008:00:130
348109299400,39cyclictest3554981-21turbostat10:59:593
3481090994038,1cyclictest0-21swapper/207:50:002
3481086994036,3cyclictest3532692-21kworker/u8:0+flush-179:010:05:011
3481084994034,4cyclictest3532744-21kworker/u8:2+flush-179:010:35:240
3481084994030,5cyclictest484-21dbus-daemon10:15:000
348109299390,37cyclictest3518150-21turbostat09:09:553
3481086993933,5cyclictest3524535-21kworker/u8:2+flush-179:009:30:001
3481086993932,5cyclictest3513389-21kworker/u8:2+events_unbound08:59:591
3481086993931,6cyclictest3480962-21latency_hist07:10:021
348108699390,30cyclictest0-21swapper/107:34:591
348108699390,30cyclictest0-21swapper/107:34:591
3481084993934,4cyclictest3567938-21kworker/u8:1+flush-179:012:25:190
3481084993933,5cyclictest3567938-21kworker/u8:1+flush-179:012:20:200
3481084993933,5cyclictest3508592-21turbostat08:39:550
3481084993932,6cyclictest3527391-21kworker/u8:1+events_unbound09:35:180
348108499390,37cyclictest714-21Xorg08:57:590
3481092993831,5cyclictest3572757-21turbostat11:55:003
3481090993835,2cyclictest0-21swapper/212:13:592
348109099380,36cyclictest0-21swapper/211:59:002
348109099380,36cyclictest0-21swapper/210:46:592
3481086993834,2cyclictest714-21Xorg10:58:001
3481086993833,4cyclictest3492400-21kworker/u8:2+flush-179:008:05:131
3481084993835,2cyclictest3562237-21kworker/u8:0+events_unbound11:20:180
3481092993734,2cyclictest0-21swapper/309:43:593
3481092993734,2cyclictest0-21swapper/307:39:003
3481092993734,2cyclictest0-21swapper/307:13:583
3481092993732,4cyclictest3558169-21turbostat11:14:553
3481090993735,1cyclictest0-21swapper/210:09:592
3481090993734,2cyclictest0-21swapper/208:50:592
3481090993734,2cyclictest0-21swapper/208:48:002
3481090993734,2cyclictest0-21swapper/208:48:002
348109099370,35cyclictest0-21swapper/211:01:592
348109099370,35cyclictest0-21swapper/210:24:592
348109099370,35cyclictest0-21swapper/209:54:592
348109099370,35cyclictest0-21swapper/208:17:592
348109099370,35cyclictest0-21swapper/208:09:592
348109099370,35cyclictest0-21swapper/207:54:592
348108499370,2cyclictest0-21swapper/011:31:580
3481092993634,1cyclictest0-21swapper/310:27:003
3481092993634,1cyclictest0-21swapper/308:40:593
348109299360,35cyclictest0-21swapper/310:43:003
348109299360,35cyclictest0-21swapper/308:16:593
348109299360,1cyclictest0-21swapper/310:05:593
348109299360,1cyclictest0-21swapper/307:33:593
348109299360,1cyclictest0-21swapper/307:33:593
3481090993634,1cyclictest0-21swapper/212:05:002
3481090993634,1cyclictest0-21swapper/212:05:002
3481090993634,1cyclictest0-21swapper/207:19:592
3481090993633,2cyclictest0-21swapper/209:59:562
3481086993633,2cyclictest0-21swapper/112:39:551
3481086993631,4cyclictest3553367-21kworker/u8:2+flush-179:010:55:011
3481092993533,1cyclictest0-21swapper/307:59:593
3481090993533,1cyclictest0-21swapper/211:35:002
3481090993533,1cyclictest0-21swapper/211:25:002
3481090993533,1cyclictest0-21swapper/207:15:002
3481090993532,2cyclictest0-21swapper/207:25:002
348109099350,1cyclictest0-21swapper/212:31:592
348109099350,1cyclictest0-21swapper/211:45:002
3481086993530,4cyclictest3497430-21kworker/u8:1+flush-179:008:10:221
3481086993527,6cyclictest3566917-21diskstats11:35:141
3481086993527,6cyclictest3566917-21diskstats11:35:141
3481084993532,2cyclictest3486058-21apt-key07:25:010
3481092993432,1cyclictest0-21swapper/312:36:593
3481092993432,1cyclictest0-21swapper/308:50:003
3481092993432,1cyclictest0-21swapper/308:49:593
3481090993432,1cyclictest0-21swapper/211:30:002
3481086993428,5cyclictest3567938-21kworker/u8:1+flush-179:012:10:211
3481086993423,9cyclictest714-21Xorg11:40:591
3481084993428,4cyclictest3575933-21latency_hist12:05:000
3481084993428,4cyclictest3575933-21latency_hist12:05:000
3481092993331,1cyclictest0-21swapper/312:34:553
3481092993331,1cyclictest0-21swapper/311:48:593
3481092993331,1cyclictest0-21swapper/310:31:593
3481092993331,1cyclictest0-21swapper/310:00:593
3481092993331,1cyclictest0-21swapper/308:09:593
3481090993331,1cyclictest0-21swapper/212:40:002
3481090993331,1cyclictest0-21swapper/208:35:002
3481084993325,5cyclictest0-21swapper/011:00:120
3481090993230,1cyclictest0-21swapper/207:35:002
3481090993230,1cyclictest0-21swapper/207:35:002
3481090993229,2cyclictest0-21swapper/212:15:592
3481090993229,2cyclictest0-21swapper/209:02:002
348108699321,29cyclictest0-21swapper/109:10:121
3481084993228,3cyclictest3494620-21fschecks_time07:50:150
3481084993227,4cyclictest3573700-21needreboot11:55:190
3481092993129,1cyclictest0-21swapper/307:15:593
3481090993129,1cyclictest0-21swapper/210:20:012
3481090993129,1cyclictest0-21swapper/208:25:002
3481090993129,1cyclictest0-21swapper/208:24:592
3481092993028,1cyclictest0-21swapper/309:53:593
3481092993028,1cyclictest0-21swapper/308:22:003
3481092993028,1cyclictest0-21swapper/308:22:003
3481092993028,1cyclictest0-21swapper/307:29:593
3481092993027,2cyclictest0-21swapper/310:10:113
348109299300,29cyclictest0-21swapper/311:58:593
3481090993027,2cyclictest0-21swapper/211:07:002
3481090993026,2cyclictest0-21swapper/207:39:552
348109099300,28cyclictest0-21swapper/211:35:032
348109099300,28cyclictest0-21swapper/211:35:032
348109099300,28cyclictest0-21swapper/210:50:152
3481086993026,2cyclictest714-21Xorg07:47:591
348108499300,29cyclictest0-21swapper/010:40:120
3481092992927,1cyclictest0-21swapper/312:20:113
3481092992927,1cyclictest0-21swapper/310:45:133
3481092992927,1cyclictest0-21swapper/308:56:593
3481092992927,1cyclictest0-21swapper/308:01:583
348109299290,27cyclictest0-21swapper/308:10:133
348109299290,21cyclictest0-21swapper/311:00:123
3481090992926,2cyclictest0-21swapper/209:25:122
3481090992926,2cyclictest0-21swapper/209:15:132
3481090992926,2cyclictest0-21swapper/208:40:132
348109099290,27cyclictest0-21swapper/210:25:122
348109099290,27cyclictest0-21swapper/208:35:132
348109099290,27cyclictest0-21swapper/207:25:032
3481084992925,3cyclictest0-21swapper/009:05:140
4577091280,6ptp4l441ktimers/311:25:003
4577091280,6ptp4l441ktimers/310:40:003
348109299280,2cyclictest0-21swapper/309:20:133
348109299280,27cyclictest0-21swapper/309:35:113
348109299280,26cyclictest0-21swapper/311:35:033
348109299280,26cyclictest0-21swapper/311:35:023
348109299280,26cyclictest0-21swapper/310:50:133
348109299280,26cyclictest0-21swapper/308:35:133
348109299280,26cyclictest0-21swapper/308:30:023
348109299280,26cyclictest0-21swapper/308:25:133
348109299280,26cyclictest0-21swapper/307:40:123
348109299280,1cyclictest0-21swapper/309:30:033
3481090992825,2cyclictest0-21swapper/211:15:132
3481090992825,2cyclictest0-21swapper/209:30:112
3481090992825,2cyclictest0-21swapper/208:00:122
348109099280,2cyclictest0-21swapper/211:50:122
348109099280,27cyclictest0-21swapper/208:10:132
348109099280,1cyclictest0-21swapper/212:21:592
3481086992824,3cyclictest3511773-21/usr/sbin/munin08:45:001
3481084992826,1cyclictest0-21swapper/007:47:590
4577091270,7ptp4l61490irq/134-eno1-TxRx-011:45:003
4577091270,6ptp4l441ktimers/311:35:003
4577091270,6ptp4l441ktimers/310:25:003
4577091270,6ptp4l441ktimers/310:20:003
3481092992725,1cyclictest0-21swapper/311:07:593
3481092992725,1cyclictest0-21swapper/309:25:133
3481092992725,1cyclictest0-21swapper/307:47:593
348109299270,26cyclictest0-21swapper/312:29:593
348109099270,25cyclictest0-21swapper/209:43:002
4577091260,6ptp4l61490irq/134-eno1-TxRx-012:05:003
4577091260,6ptp4l61490irq/134-eno1-TxRx-012:05:003
4577091260,6ptp4l441ktimers/310:00:003
4577091260,6ptp4l441ktimers/309:05:003
4577091260,6ptp4l441ktimers/308:54:573
4577091260,5ptp4l61490irq/134-eno1-TxRx-012:10:003
4577091260,5ptp4l61490irq/134-eno1-TxRx-009:50:013
4577091260,5ptp4l441ktimers/312:14:563
4577091260,5ptp4l441ktimers/307:54:563
3481092992624,1cyclictest0-21swapper/312:17:593
3481092992624,1cyclictest0-21swapper/311:16:593
3481092992624,1cyclictest0-21swapper/309:10:593
3481090992623,2cyclictest0-21swapper/210:13:002
348109099260,2cyclictest0-21swapper/211:45:592
348109099260,24cyclictest0-21swapper/212:27:592
348109099260,24cyclictest0-21swapper/209:37:592
4577091250,5ptp4l61490irq/134-eno1-TxRx-011:30:003
3481090992523,1cyclictest0-21swapper/210:34:592
3481090992523,1cyclictest0-21swapper/208:30:002
348109099250,1cyclictest0-21swapper/208:59:592
3481090992422,1cyclictest0-21swapper/209:25:002
3481090992321,1cyclictest0-21swapper/211:10:122
3481090992319,2cyclictest0-21swapper/212:09:552
3481090992219,2cyclictest0-21swapper/210:00:132
3481090992119,1cyclictest0-21swapper/207:58:592
3481090992018,1cyclictest0-21swapper/210:55:122
3481090992018,1cyclictest0-21swapper/209:10:112
3481090992017,2cyclictest0-21swapper/210:44:552
3481090992017,2cyclictest0-21swapper/210:35:112
3481084991916,2cyclictest0-21swapper/007:10:020
3481090991411,2cyclictest0-21swapper/209:47:592
34810909980,7cyclictest0-21swapper/209:07:342
34810909930,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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