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2026-09-22 - 14:39
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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 Tue Sep 22, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
146334099154142,8cyclictest1213033-21systemd-journal00:04:001
146333799142124,12cyclictest1496909-21true20:54:590
146334099141124,14cyclictest510-21rs:main1
146333799135127,5cyclictest1485479-21latency_hist20:20:010
146333799135123,9cyclictest1213033-21systemd-journal19:50:010
146334099134119,12cyclictest1539032-21kworker/u8:2+events_unbound23:05:271
146333799132121,8cyclictest1513356-21kworker/u8:2+flush-179:022:00:230
146333799132121,8cyclictest1513356-21kworker/u8:2+flush-179:022:00:230
146334099130118,9cyclictest1466391-21latency_hist19:20:011
146333799128121,5cyclictest1487118-21kworker/u8:2+flush-179:020:30:240
146334099126113,10cyclictest1554931-21kworker/u8:0+flush-179:000:15:231
146334099123113,7cyclictest1479166-21kworker/u8:3+flush-179:020:10:151
146333799123114,7cyclictest1540866-21kworker/u8:0+flush-179:023:15:250
146334099121115,4cyclictest1534311-21kworker/u8:1+flush-179:023:05:001
146334099121113,6cyclictest1490246-21kworker/u8:0+flush-179:022:30:271
146333799120113,5cyclictest1524761-21kworker/u8:3+events_unbound22:30:000
146334099118111,4cyclictest1490246-21kworker/u8:0+flush-179:022:45:171
146334099118103,12cyclictest1213033-21systemd-journal20:05:001
146333799117103,9cyclictest1480751-21true20:04:590
146333799116109,5cyclictest1496925-21kworker/u8:3+flush-179:021:05:230
146334099112106,4cyclictest1516472-21kworker/u8:3+flush-179:021:55:231
146334099112106,4cyclictest1490246-21kworker/u8:0+flush-179:021:35:221
146334099112105,5cyclictest1475971-21kworker/u8:2+events_unbound19:55:221
146334099111104,5cyclictest1464840-21kworker/u8:0+flush-179:019:20:201
146334099111104,4cyclictest1487118-21kworker/u8:2+events_unbound20:35:261
14633379910999,7cyclictest1213033-21systemd-journal23:50:210
14633409910799,6cyclictest1554931-21kworker/u8:0+flush-179:000:30:181
14633409910780,23cyclictest1487083-21latency_hist20:25:021
146334099107102,4cyclictest1513356-21kworker/u8:2+events_unbound22:10:001
14633379910799,6cyclictest1474354-21latency_hist19:45:000
14633379910696,8cyclictest1500332-21latency_hist21:05:010
146333799106100,4cyclictest1540866-21kworker/u8:0+flush-179:023:20:170
14633379910598,5cyclictest1547235-21kworker/u8:3+flush-179:023:45:210
14633379910496,6cyclictest1518083-21latency_hist22:00:020
14633379910396,5cyclictest1554931-21kworker/u8:0+flush-179:000:15:250
14633409910296,4cyclictest1507619-21kworker/u8:1+flush-179:021:50:221
14633409910296,4cyclictest1468018-21kworker/u8:1+flush-179:019:25:181
14633409910093,5cyclictest1563203-21kworker/u8:1+flush-179:000:20:271
14633409910092,5cyclictest1547235-21kworker/u8:3+flush-179:023:45:211
14633409910088,9cyclictest1492120-21apt-get20:40:121
14633379910093,5cyclictest1468018-21kworker/u8:1+flush-179:019:25:210
14633379910090,7cyclictest1213033-21systemd-journal20:15:010
1463340999989,8cyclictest510-21rs:main1
1463337999992,5cyclictest1539032-21kworker/u8:2+flush-179:023:05:250
1463337999991,6cyclictest1496925-21kworker/u8:3+flush-179:021:20:220
1463337999991,5cyclictest1490246-21kworker/u8:0+events_unbound22:35:180
1463337999989,7cyclictest1490246-21kworker/u8:0+flush-179:022:25:010
1463340999892,4cyclictest1554931-21kworker/u8:0+flush-179:000:10:241
1463337999891,5cyclictest1563203-21kworker/u8:1+flush-179:000:20:260
1463340999791,4cyclictest1527931-21kworker/u8:2+flush-179:022:40:211
1463337999690,4cyclictest1513356-21kworker/u8:2+flush-179:021:45:210
1463337999689,5cyclictest1569008-21kworker/u8:2+flush-179:000:40:000
1463340999590,4cyclictest1496925-21kworker/u8:3+flush-179:021:05:221
1463340999588,5cyclictest1513356-21kworker/u8:2+events_unbound21:45:001
1463340999588,5cyclictest1490246-21kworker/u8:0+flush-179:020:55:241
1463337999590,4cyclictest1471135-21kworker/u8:1+flush-179:019:35:270
1463337999588,4cyclictest1539032-21kworker/u8:2+flush-179:023:10:200
1463337999585,7cyclictest1534263-21latency_hist22:50:000
1463337999585,7cyclictest1491855-21latency_hist20:40:000
1463340999487,5cyclictest1524761-21kworker/u8:3+flush-179:022:25:211
1463337999486,6cyclictest1463162-21kworker/u8:2+flush-179:019:15:220
1463340999386,5cyclictest1474329-21kworker/u8:3+flush-179:019:45:221
1463337999183,5cyclictest1475971-21kworker/u8:2+events_unbound19:50:220
1463337999083,6cyclictest1547235-21kworker/u8:3+flush-179:023:40:000
1463340998981,5cyclictest1513356-21kworker/u8:2+events_unbound22:15:171
1463340998979,8cyclictest1487061-21kworker/u8:1+flush-179:020:25:261
1463337998984,3cyclictest1554931-21kworker/u8:0+flush-179:000:25:260
1463337998982,5cyclictest1475971-21kworker/u8:2+flush-179:020:05:180
1463337998981,5cyclictest1507619-21kworker/u8:1+flush-179:021:50:130
1463340998875,11cyclictest1556571-40mandb00:00:011
1463337998882,4cyclictest1496925-21kworker/u8:3+events_unbound21:15:240
1463337998879,7cyclictest1527931-21kworker/u8:2+flush-179:022:45:010
1463337998876,10cyclictest510-21rs:main0
1463340998781,4cyclictest1490246-21kworker/u8:0+flush-179:022:35:171
1463337998780,4cyclictest1487061-21kworker/u8:1+flush-179:020:45:250
1463340998677,7cyclictest1487061-21kworker/u8:1+events_unbound20:30:201
1463340998576,6cyclictest1519945-21latency_hist22:05:011
1463340998576,6cyclictest1519945-21latency_hist22:05:011
1463340998575,7cyclictest1540866-21kworker/u8:0+flush-179:023:15:231
1463340998377,4cyclictest1540866-21kworker/u8:0+events_unbound23:30:011
1463340998372,9cyclictest1213033-21systemd-journal00:40:011
1463337998377,4cyclictest1544353-21kworker/u8:1+flush-179:023:40:200
1463337998377,4cyclictest1490246-21kworker/u8:0+flush-179:022:05:160
1463344998274,6cyclictest1518084-21turbostat22:00:013
1463340998274,6cyclictest1475971-21kworker/u8:2+flush-179:020:15:211
1463337998276,4cyclictest1544353-21kworker/u8:1+flush-179:023:55:240
1463337998275,6cyclictest1524678-21kworker/u8:1+flush-179:022:20:000
1463337998275,5cyclictest1534311-21kworker/u8:1+flush-179:022:55:230
1463340998169,10cyclictest1534311-21kworker/u8:1+flush-179:022:50:231
1463340998168,11cyclictest1213033-21systemd-journal21:20:001
1463337998173,5cyclictest1556618-21kworker/u8:3+flush-179:000:05:230
1463337998172,7cyclictest1554931-21kworker/u8:0+flush-179:000:10:230
1463337998171,7cyclictest1508542-21latency_hist21:30:020
1463341998021,2cyclictest0-21swapper/223:21:592
1463340998074,5cyclictest1554931-21kworker/u8:0+flush-179:000:30:011
1463340998068,9cyclictest1493703-21apt-get20:45:121
1463337998072,6cyclictest1544353-21kworker/u8:1+events_unbound23:30:250
1463337998072,6cyclictest1534311-21kworker/u8:1+events_unbound23:00:140
1463337997970,7cyclictest1498467-21apt-get21:00:010
1463337997969,8cyclictest1534518-21apt-get22:50:110
1463340997873,3cyclictest1477522-21latency_hist19:55:001
146333799781,74cyclictest1-21systemd23:30:010
1463340997772,4cyclictest1463162-21kworker/u8:2+events_unbound19:35:011
1463337997761,6cyclictest1513356-21kworker/u8:2+events_unbound22:15:010
1463340997670,4cyclictest1479166-21kworker/u8:3+flush-179:020:05:281
1463340997565,8cyclictest1553618-21apt-get23:50:141
1463337997566,6cyclictest1507619-21kworker/u8:1+flush-179:021:40:220
1463337997468,4cyclictest1479166-21kworker/u8:3+flush-179:020:25:170
1463337997365,6cyclictest1496925-21kworker/u8:3+flush-179:021:10:180
1463337997365,6cyclictest1496925-21kworker/u8:3+flush-179:021:10:180
1463340997267,4cyclictest1487061-21kworker/u8:1+flush-179:021:00:261
1463340997266,4cyclictest1544353-21kworker/u8:1+flush-179:023:40:221
1463340997216,1cyclictest271rcuc/123:21:591
1463337997266,5cyclictest1463163-21kworker/u8:3+flush-179:019:15:000
1463337997264,6cyclictest1554931-21kworker/u8:0+flush-179:000:30:150
1463340997064,4cyclictest1471135-21kworker/u8:1+flush-179:019:35:211
1463337997065,2cyclictest1490246-21kworker/u8:0+flush-179:022:30:260
1463337997063,5cyclictest1556618-21kworker/u8:3+flush-179:000:03:590
1463337996962,5cyclictest1496925-21kworker/u8:3+flush-179:021:30:200
1463340996863,4cyclictest1496925-21kworker/u8:3+flush-179:021:14:551
1463340996863,4cyclictest1496925-21kworker/u8:3+flush-179:021:14:551
1463340996760,4cyclictest1554931-21kworker/u8:0+flush-179:000:05:151
146334499650,1cyclictest0-21swapper/323:54:593
1463340996559,5cyclictest1547235-21kworker/u8:3+events_unbound23:35:011
1463337996558,5cyclictest1487061-21kworker/u8:1+flush-179:020:40:240
1463337996556,6cyclictest1511720-21latency_hist21:40:010
1463340996457,6cyclictest1490246-21kworker/u8:0+flush-179:021:30:001
1463340996357,4cyclictest1534311-21kworker/u8:1+flush-179:022:55:171
1463340996256,5cyclictest1513356-21kworker/u8:2+flush-179:021:49:561
1463337996153,6cyclictest1483936-21kworker/u8:0+flush-179:020:20:210
1463340996051,7cyclictest1521785-21apt-get22:10:131
1463337996055,3cyclictest1475971-21kworker/u8:2+flush-179:019:55:170
1463340995950,6cyclictest1-21systemd23:40:001
1463337995951,6cyclictest1464840-21kworker/u8:0+flush-179:019:20:200
1463340995853,4cyclictest1490246-21kworker/u8:0+events_unbound22:20:191
1463340995852,5cyclictest1463163-21kworker/u8:3+flush-179:019:10:231
1463340995448,4cyclictest1539032-21kworker/u8:2+events_unbound23:10:131
1463341995248,2cyclictest0-21swapper/219:44:592
4577091490,9ptp4l441ktimers/319:05:503
1463340994836,11cyclictest1496925-21kworker/u8:3+events_unbound21:20:251
1463341994643,2cyclictest0-21swapper/220:53:592
1463340994641,4cyclictest1471135-21kworker/u8:1+flush-179:019:40:221
146334499440,42cyclictest1531092-21turbostat22:40:003
146334499430,35cyclictest1464792-21turbostat19:15:003
1463344994240,1cyclictest0-21swapper/320:56:003
1463344994240,1cyclictest0-21swapper/320:32:593
146334499410,39cyclictest0-21swapper/320:06:003
146334499410,2cyclictest0-21swapper/321:15:583
1463344994034,5cyclictest1480727-21turbostat20:04:593
146334499400,38cyclictest1526325-21turbostat22:25:003
1463344993934,4cyclictest1551792-21turbostat23:45:003
1463344993933,5cyclictest1568016-21turbostat00:35:003
1463344993933,5cyclictest1506969-21turbostat21:25:003
146334499390,38cyclictest1540638-21turbostat23:10:003
1463344993833,4cyclictest1479121-21turbostat20:00:003
1463344993832,5cyclictest1527906-21turbostat22:30:013
146334499380,3cyclictest1511740-21turbostat21:40:003
1463341993835,2cyclictest0-21swapper/221:52:592
1463344993735,1cyclictest0-21swapper/300:35:583
1463344993734,2cyclictest0-21swapper/323:59:593
146334499370,36cyclictest0-21swapper/321:42:003
1463341993734,2cyclictest0-21swapper/222:32:002
1463341993734,2cyclictest0-21swapper/220:13:592
1463341993734,2cyclictest0-21swapper/219:32:592
146334199370,35cyclictest0-21swapper/220:39:592
1463344993634,1cyclictest0-21swapper/322:16:593
1463344993634,1cyclictest0-21swapper/300:24:593
1463344993630,5cyclictest1560057-21turbostat00:10:003
1463344993630,5cyclictest1543816-21turbostat23:20:003
1463344993630,4cyclictest1483907-21turbostat20:15:013
1463344993629,5cyclictest1558473-21turbostat00:04:593
1463341993634,1cyclictest0-21swapper/221:50:002
1463341993633,2cyclictest0-21swapper/221:58:582
1463341993633,2cyclictest0-21swapper/200:24:552
1463341993632,2cyclictest0-21swapper/219:29:552
1463337993626,7cyclictest1463178-21latency_hist19:10:020
4577091350,15ptp4l61490irq/134-eno1-TxRx-020:50:003
1463344993529,4cyclictest1491852-21turbostat20:40:003
146334499350,1cyclictest0-21swapper/320:44:593
1463341993531,2cyclictest0-21swapper/222:16:592
1463344993432,1cyclictest0-21swapper/319:51:003
1463344993432,1cyclictest0-21swapper/319:19:003
1463341993432,1cyclictest0-21swapper/220:50:002
1463341993431,2cyclictest0-21swapper/223:41:592
1463344993331,1cyclictest0-21swapper/319:49:553
1463341993330,2cyclictest0-21swapper/221:04:002
1463341993330,2cyclictest0-21swapper/200:39:552
146334199330,31cyclictest0-21swapper/221:32:002
146334199330,31cyclictest0-21swapper/219:47:592
1463344993230,1cyclictest0-21swapper/320:19:593
1463344993227,4cyclictest1534269-21turbostat22:50:003
1463344993226,5cyclictest1519957-21turbostat22:05:003
1463344993226,5cyclictest1519957-21turbostat22:05:003
1463344993225,6cyclictest1563244-21turbostat00:20:003
1463341993228,2cyclictest0-21swapper/219:38:592
1463344993126,4cyclictest1471166-21turbostat19:35:013
1463341993128,2cyclictest0-21swapper/220:07:592
1463341993127,2cyclictest0-21swapper/200:03:002
1463341993027,2cyclictest0-21swapper/200:18:592
1463341993026,2cyclictest0-21swapper/222:25:132
1463341993025,3cyclictest0-21swapper/219:15:582
1463341993025,2cyclictest0-21swapper/220:55:132
1463344992926,2cyclictest0-21swapper/323:25:143
1463344992923,5cyclictest1548595-21turbostat23:35:003
146334499290,28cyclictest0-21swapper/320:50:123
1463341992926,2cyclictest0-21swapper/223:38:582
1463341992926,2cyclictest0-21swapper/223:29:552
1463341992926,2cyclictest0-21swapper/222:50:122
1463341992926,2cyclictest0-21swapper/222:20:592
1463341992926,2cyclictest0-21swapper/222:10:142
1463341992926,2cyclictest0-21swapper/222:08:592
1463341992926,2cyclictest0-21swapper/221:05:132
146334199290,27cyclictest0-21swapper/223:30:142
146334199290,27cyclictest0-21swapper/222:45:142
146334199290,27cyclictest0-21swapper/219:10:592
146334199290,27cyclictest0-21swapper/200:30:152
4577091280,6ptp4l441ktimers/323:14:563
4577091280,6ptp4l441ktimers/321:35:003
1463344992826,1cyclictest0-21swapper/322:30:163
1463344992825,2cyclictest0-21swapper/323:35:133
1463344992825,2cyclictest0-21swapper/319:25:133
1463344992823,4cyclictest1523130-21turbostat22:15:003
1463344992822,4cyclictest1502185-21turbostat21:14:563
1463344992822,4cyclictest1502185-21turbostat21:14:553
1463341992825,2cyclictest0-21swapper/223:15:142
1463341992825,2cyclictest0-21swapper/222:00:012
1463341992825,2cyclictest0-21swapper/222:00:012
1463341992824,2cyclictest0-21swapper/222:40:132
146334199280,2cyclictest0-21swapper/220:30:152
146334199280,2cyclictest0-21swapper/219:20:122
146334199280,26cyclictest0-21swapper/200:25:132
146334199280,21cyclictest0-21swapper/200:00:032
4577091270,6ptp4l61490irq/134-eno1-TxRx-023:05:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:44:593
4577091270,6ptp4l441ktimers/322:45:013
4577091270,5ptp4l441ktimers/322:10:003
4577091270,5ptp4l441ktimers/321:50:003
4577091270,5ptp4l441ktimers/321:30:013
1463344992725,1cyclictest0-21swapper/322:54:593
1463344992725,1cyclictest0-21swapper/319:35:143
1463344992725,1cyclictest0-21swapper/300:13:593
146334499270,26cyclictest0-21swapper/321:05:013
146334499270,1cyclictest0-21swapper/321:05:023
1463341992725,1cyclictest0-21swapper/221:35:122
146334199270,1cyclictest0-21swapper/222:56:592
4577091260,5ptp4l441ktimers/323:49:543
4577091260,5ptp4l441ktimers/319:25:003
4577091260,5ptp4l441ktimers/300:29:553
1463341992623,2cyclictest0-21swapper/221:20:132
1463341992623,2cyclictest0-21swapper/219:50:592
1463341992623,2cyclictest0-21swapper/200:05:122
4577091250,4ptp4l61490irq/134-eno1-TxRx-022:59:553
4577091250,4ptp4l441ktimers/320:30:013
1463344992523,1cyclictest0-21swapper/320:25:003
1463341992523,1cyclictest0-21swapper/221:20:002
146334199250,24cyclictest0-21swapper/220:20:132
4577091240,5ptp4l61490irq/134-eno1-TxRx-023:25:003
1463344992422,1cyclictest0-21swapper/321:54:593
1463341992421,2cyclictest0-21swapper/223:50:582
146334199240,1cyclictest0-21swapper/223:04:592
1463341992321,1cyclictest0-21swapper/221:14:582
1463341992321,1cyclictest0-21swapper/221:14:582
1463341992320,2cyclictest0-21swapper/223:10:122
1463341992220,1cyclictest0-21swapper/219:55:122
1463341992118,2cyclictest0-21swapper/221:42:592
1463341992017,2cyclictest0-21swapper/220:25:592
1463341992016,2cyclictest0-21swapper/200:11:592
1463341991917,1cyclictest0-21swapper/221:29:582
1463341991916,2cyclictest0-21swapper/220:41:582
1463341991815,2cyclictest0-21swapper/223:49:552
1463340991812,5cyclictest1463420-21date19:10:011
1463341991310,2cyclictest0-21swapper/222:37:592
146334199118,2cyclictest0-21swapper/223:09:592
146334199118,2cyclictest0-21swapper/220:15:592
14633419963,2cyclictest0-21swapper/220:01:232
14633419930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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