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2026-01-12 - 11:30
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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 highest latencies:
System rackeslot6.osadl.org (updated Mon Jan 12, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21709939910695,9cyclictest2264821-40mandb00:00:011
21709939910093,6cyclictest2265822-21kworker/u8:0+events_unbound00:05:011
2170991999885,10cyclictest2264821-40mandb00:00:010
2170991999791,4cyclictest2251859-21kworker/u8:0+events_unbound23:45:000
2170991998979,7cyclictest2206726-21latency_hist21:00:010
2170991998882,4cyclictest2188957-21kworker/u8:0+flush-179:020:05:260
2170991998780,4cyclictest2154674-21kworker/u8:0+flush-179:019:20:000
2170991998675,5cyclictest2188957-21kworker/u8:0+events_unbound20:15:230
2170993998479,4cyclictest2154674-21kworker/u8:0+flush-179:019:20:001
2170991998476,4cyclictest2174102-21kworker/u8:1+flush-179:019:30:010
2170991998373,8cyclictest2221318-21latency_hist21:45:010
2170991998372,9cyclictest2236128-21/usr/sbin/munin22:30:250
2170993998276,4cyclictest2158258-21kworker/u8:3+events_unbound19:15:001
2170993998074,5cyclictest2197763-21kworker/u8:0+flush-179:020:35:011
2170991998071,6cyclictest2239746-21kworker/u8:2+flush-179:023:20:200
2170991997973,5cyclictest2277002-21kworker/u8:2+events_unbound00:35:240
2170993997872,4cyclictest2239746-21kworker/u8:2+events_unbound22:55:001
2170991997874,3cyclictest2213903-21kworker/u8:1+flush-179:022:00:270
2170991997870,6cyclictest2213903-21kworker/u8:1+flush-179:022:25:000
2170991997868,8cyclictest2179136-21/usr/sbin/munin19:35:240
2170993997771,5cyclictest2263227-21kworker/u8:2+events_unbound00:15:231
2170993997771,4cyclictest2213903-21kworker/u8:1+flush-179:021:40:201
2170991997771,5cyclictest2213903-21kworker/u8:1+flush-179:023:15:010
2170993997668,6cyclictest2224724-21kworker/u8:3+flush-179:022:00:011
2170993997570,4cyclictest2174176-21kworker/u8:2+events_unbound19:20:241
2170993997569,4cyclictest2213903-21kworker/u8:1+flush-179:021:50:191
2170991997570,4cyclictest2263227-21kworker/u8:2+events_unbound00:20:010
2170993997467,6cyclictest2193978-21kworker/u8:1+events_unbound20:45:011
2170993997465,7cyclictest2214952-21latency_hist21:25:011
2170991997468,4cyclictest2192127-21kworker/u8:3+events_unbound20:20:210
2170993997367,4cyclictest2213903-21kworker/u8:1+events_unbound21:25:241
2170993997366,5cyclictest2213903-21kworker/u8:1+events_unbound22:40:231
2170991997368,4cyclictest2239746-21kworker/u8:2+flush-179:023:00:250
2170991997366,4cyclictest2234092-21kworker/u8:3+events_unbound22:35:240
2170993997266,4cyclictest2261844-21kworker/u8:1+flush-179:023:55:001
2170991997268,2cyclictest2263227-21kworker/u8:2+events_unbound00:00:090
2170991997265,5cyclictest2208364-21kworker/u8:2+events_unbound21:10:230
2170991997264,6cyclictest2214996-21kworker/u8:3+flush-179:021:30:210
2170991997264,6cyclictest2214996-21kworker/u8:3+flush-179:021:30:200
2170991997264,6cyclictest2213903-21kworker/u8:1+events_unbound21:50:170
2170993997166,4cyclictest2213903-21kworker/u8:1+events_unbound22:55:181
2170993997165,5cyclictest2188957-21kworker/u8:0+flush-179:020:20:001
2170993997165,4cyclictest2195644-21kworker/u8:2+flush-179:020:35:151
2170991997166,4cyclictest2274372-21kworker/u8:0+flush-179:000:30:240
2170991997163,5cyclictest2242254-21latency_hist22:50:010
2170993997061,6cyclictest2205112-21kworker/u8:0+flush-179:021:15:151
2170991997063,5cyclictest2174102-21kworker/u8:1+events_unbound19:30:190
2170993996963,5cyclictest2213903-21kworker/u8:1+events_unbound22:35:271
2170993996962,5cyclictest2213903-21kworker/u8:1+events_unbound21:45:131
2170993996863,4cyclictest2158258-21kworker/u8:3+events_unbound19:55:251
2170993996759,6cyclictest2158258-21kworker/u8:3+flush-179:020:00:151
2170991996760,5cyclictest2268052-21kworker/u8:1+events_unbound00:10:140
2170991996661,4cyclictest2195644-21kworker/u8:2+flush-179:020:30:260
2170991996660,5cyclictest2205112-21kworker/u8:0+events_unbound21:15:240
2170991996659,4cyclictest2251859-21kworker/u8:0+events_unbound23:25:150
217099899650,63cyclictest0-21swapper/320:51:593
217099699650,1cyclictest0-21swapper/222:01:002
2170993996560,4cyclictest2251859-21kworker/u8:0+flush-179:023:35:001
2170993996560,3cyclictest2205112-21kworker/u8:0+events_unbound20:55:221
2170993996559,4cyclictest2232697-21kworker/u8:2+events_unbound22:25:231
2170993996559,4cyclictest2193978-21kworker/u8:1+events_unbound20:45:131
2170993996557,6cyclictest2188957-21kworker/u8:0+flush-179:020:05:271
2170993996556,7cyclictest2213903-21kworker/u8:1+events_unbound23:35:201
2170993996554,3cyclictest2200414-21kworker/u8:3+events_unbound21:00:221
2170991996558,4cyclictest2268052-21kworker/u8:1+flush-179:000:25:210
2170991996557,5cyclictest2213903-21kworker/u8:1+events_unbound22:40:190
2170993996459,3cyclictest2205112-21kworker/u8:0+flush-179:021:05:201
2170993996458,5cyclictest2227667-21kworker/u8:0+flush-179:022:10:001
2170993996359,3cyclictest2158258-21kworker/u8:3+flush-179:019:45:001
2170993996358,4cyclictest2174176-21kworker/u8:2+events_unbound19:25:251
2170993996357,5cyclictest2213903-21kworker/u8:1+events_unbound22:00:201
2170991996256,4cyclictest2174102-21kworker/u8:1+events_unbound19:50:030
2170991996256,4cyclictest2174102-21kworker/u8:1+events_unbound19:50:030
2170991996156,4cyclictest2195644-21kworker/u8:2+events_unbound20:45:230
2170991996153,6cyclictest2248618-21latency_hist23:10:010
2170993996055,4cyclictest2274372-21kworker/u8:0+flush-179:000:30:211
2170993996054,5cyclictest2188957-21kworker/u8:0+flush-179:020:10:281
2170993996053,5cyclictest2276540-21kworker/u8:1+events_unbound00:35:181
2170991996056,3cyclictest2158258-21kworker/u8:3+flush-179:019:10:230
2170991996054,5cyclictest2219967-21kworker/u8:2+flush-179:021:50:000
2170993995954,4cyclictest2271230-21kworker/u8:3+flush-179:000:20:221
2170991995953,4cyclictest2158258-21kworker/u8:3+flush-179:019:45:200
2170991995952,5cyclictest2235644-21apt-get22:29:590
2170991995950,7cyclictest2183030-21kworker/u8:2+events_unbound19:55:150
2170993995852,4cyclictest2213903-21kworker/u8:1+events_unbound22:20:201
2170993995751,5cyclictest2251859-21kworker/u8:0+flush-179:023:25:261
2170993995751,5cyclictest2192127-21kworker/u8:3+flush-179:020:25:251
2170993995750,5cyclictest2263227-21kworker/u8:2+flush-179:000:05:211
2170991995752,3cyclictest2190804-21kworker/u8:1+flush-179:020:10:160
2170991995751,5cyclictest2227667-21kworker/u8:0+events_unbound22:10:230
2170991995751,4cyclictest2208364-21kworker/u8:2+flush-179:021:20:210
2170991995749,6cyclictest2174176-21kworker/u8:2+flush-179:019:20:150
2170991995746,9cyclictest2228223-21diskstats22:05:140
2170993995652,3cyclictest2213903-21kworker/u8:1+events_unbound22:30:151
2170993995651,4cyclictest2174102-21kworker/u8:1+flush-179:019:50:161
2170993995651,4cyclictest2174102-21kworker/u8:1+flush-179:019:50:161
2170991995650,4cyclictest2251859-21kworker/u8:0+events_unbound23:30:200
2170998995548,5cyclictest2264790-21turbostat00:00:003
2170993995551,3cyclictest2239746-21kworker/u8:2+flush-179:023:00:201
2170991995549,3cyclictest2271230-21kworker/u8:3+flush-179:000:20:210
2170993995348,4cyclictest2239746-21kworker/u8:2+events_unbound23:15:201
2170991995348,4cyclictest2213903-21kworker/u8:1+events_unbound22:00:010
2170991995346,6cyclictest2195644-21kworker/u8:2+events_unbound20:51:000
2170993995250,1cyclictest2213903-21kworker/u8:1+events_unbound21:35:211
2170993995247,4cyclictest2158258-21kworker/u8:3+events_unbound19:45:221
2170993995245,6cyclictest2227667-21kworker/u8:0+flush-179:022:15:201
2170991995145,5cyclictest2174102-21kworker/u8:1+flush-179:019:40:210
2170991995138,5cyclictest2213903-21kworker/u8:1+events_unbound21:35:190
2170993995045,3cyclictest2239746-21kworker/u8:2+events_unbound23:05:201
2170991995044,5cyclictest2195644-21kworker/u8:2+events_unbound20:40:240
2170991995043,6cyclictest2266273-21kworker/u8:4+flush-179:000:10:000
2170993994944,4cyclictest2251859-21kworker/u8:0+events_unbound23:45:241
2170993994944,4cyclictest2174102-21kworker/u8:1+flush-179:019:35:011
4577091480,13ptp4l61490irq/134-eno1-TxRx-019:10:003
2170993994833,4cyclictest2268052-21kworker/u8:1+events_unbound00:25:171
2170991994742,4cyclictest2261615-21turbostat23:54:550
2170991994742,4cyclictest2239746-21kworker/u8:2+flush-179:022:55:160
2170991994742,4cyclictest2213903-21kworker/u8:1+flush-179:021:25:210
2170996994643,2cyclictest0-21swapper/219:10:592
2170991994637,7cyclictest266-21systemd-journal21:05:580
2170993994538,6cyclictest2258673-21kworker/u8:2+events_unbound23:40:211
2170996994436,6cyclictest0-21swapper/221:14:562
2170993994440,3cyclictest2213903-21kworker/u8:1+flush-179:022:45:231
2170998994340,2cyclictest0-21swapper/300:08:593
2170996994333,8cyclictest0-21swapper/200:35:002
2170993994331,11cyclictest2213903-21kworker/u8:1+flush-179:021:30:211
2170993994331,11cyclictest2213903-21kworker/u8:1+flush-179:021:30:201
2170991994237,4cyclictest2239746-21kworker/u8:2+events_unbound22:50:250
2170991994137,3cyclictest2213903-21kworker/u8:1+flush-179:023:15:260
2170991994136,4cyclictest2251859-21kworker/u8:0+events_unbound23:45:180
217099199410,40cyclictest211irq_work/020:02:590
2170993994036,3cyclictest2268052-21kworker/u8:1+flush-179:000:10:231
2170991994035,4cyclictest2195644-21kworker/u8:2+flush-179:020:35:210
2170993993936,2cyclictest0-21swapper/123:14:591
2170993993935,2cyclictest0-21swapper/120:20:121
2170993993934,4cyclictest2253435-21systemd-run23:25:001
2170993993934,4cyclictest2200414-21kworker/u8:3+events_unbound20:50:131
2170993993932,5cyclictest2230852-21latency_hist22:15:011
2170998993833,4cyclictest2206754-21turbostat21:00:003
217099899380,37cyclictest2183950-21turbostat19:50:003
2170996993835,2cyclictest0-21swapper/222:53:592
217099699380,35cyclictest0-21swapper/223:29:552
2170991993830,6cyclictest266-21systemd-journal22:17:000
2170998993735,1cyclictest0-21swapper/321:34:003
2170998993735,1cyclictest0-21swapper/321:33:593
2170998993735,1cyclictest0-21swapper/300:33:593
2170998993731,5cyclictest2240678-21turbostat22:45:003
217099899370,36cyclictest0-21swapper/323:01:593
217099899370,35cyclictest0-21swapper/320:15:593
2170996993734,2cyclictest0-21swapper/222:57:002
2170996993734,2cyclictest0-21swapper/221:59:552
2170996993734,2cyclictest0-21swapper/219:31:592
2170996993734,2cyclictest0-21swapper/200:08:592
217099699370,35cyclictest0-21swapper/200:24:592
2170998993634,1cyclictest0-21swapper/322:06:583
2170998993634,1cyclictest0-21swapper/320:13:593
2170998993634,1cyclictest0-21swapper/319:28:593
2170998993633,2cyclictest0-21swapper/323:05:583
2170998993633,2cyclictest0-21swapper/300:37:593
217099899360,35cyclictest0-21swapper/321:52:583
217099899360,35cyclictest0-21swapper/300:20:593
2170996993633,2cyclictest0-21swapper/220:24:562
2170996993633,2cyclictest0-21swapper/200:29:562
217099699360,1cyclictest0-21swapper/223:10:002
2170993993633,2cyclictest714-21Xorg19:39:591
2170993993631,4cyclictest2211366-21cut21:10:211
2170998993533,1cyclictest0-21swapper/322:29:593
217099899350,1cyclictest0-21swapper/320:50:003
217099899350,1cyclictest0-21swapper/320:07:593
2170996993532,2cyclictest0-21swapper/223:11:592
2170996993532,2cyclictest0-21swapper/220:55:592
2170996993531,2cyclictest0-21swapper/223:41:592
217099699350,1cyclictest0-21swapper/222:50:002
217099699350,1cyclictest0-21swapper/220:41:592
2170998993432,1cyclictest0-21swapper/323:44:593
2170996993432,1cyclictest0-21swapper/200:05:002
2170996993431,2cyclictest0-21swapper/222:39:552
2170991993430,3cyclictest2251859-21kworker/u8:0+events_unbound23:40:000
2170996993331,1cyclictest0-21swapper/219:30:002
2170996993330,2cyclictest0-21swapper/223:52:592
2170996993329,2cyclictest0-21swapper/200:40:002
2170991993329,2cyclictest714-21Xorg20:27:590
2170991993326,5cyclictest714-21Xorg21:02:590
2170998993231,1cyclictest0-21swapper/322:02:003
2170998993230,1cyclictest0-21swapper/320:35:003
2170996993230,1cyclictest0-21swapper/220:49:592
2170996993229,2cyclictest0-21swapper/223:39:562
2170996993229,2cyclictest0-21swapper/220:06:002
2170996993229,2cyclictest0-21swapper/220:01:592
217099699320,2cyclictest0-21swapper/220:15:592
2170998993129,1cyclictest0-21swapper/300:15:593
2170998993126,4cyclictest2234061-21turbostat22:25:013
217099899310,30cyclictest0-21swapper/319:57:593
217099899310,1cyclictest0-21swapper/321:58:003
2170996993129,1cyclictest0-21swapper/221:39:592
2170996993129,1cyclictest0-21swapper/220:30:002
2170998993028,1cyclictest0-21swapper/321:24:543
2170998993028,1cyclictest0-21swapper/321:00:583
2170998993028,1cyclictest0-21swapper/300:00:593
2170998993027,2cyclictest0-21swapper/322:30:013
2170998993027,2cyclictest0-21swapper/319:20:143
2170998992926,2cyclictest0-21swapper/321:44:003
2170998992926,2cyclictest0-21swapper/319:10:123
217099899290,28cyclictest0-21swapper/319:40:033
217099899290,1cyclictest0-21swapper/320:23:593
2170996992926,2cyclictest0-21swapper/222:40:132
2170996992926,2cyclictest0-21swapper/221:30:132
2170996992926,2cyclictest0-21swapper/221:30:132
2170996992926,2cyclictest0-21swapper/219:50:022
2170996992926,2cyclictest0-21swapper/219:50:022
2170996992926,2cyclictest0-21swapper/219:40:112
2170996992926,2cyclictest0-21swapper/200:10:122
217099699290,2cyclictest0-21swapper/220:12:582
217099699290,27cyclictest0-21swapper/222:30:012
217099699290,27cyclictest0-21swapper/221:29:592
4577091280,7ptp4l61490irq/134-eno1-TxRx-021:50:003
4577091280,6ptp4l441ktimers/319:40:003
2170998992825,2cyclictest0-21swapper/323:45:133
2170998992825,2cyclictest0-21swapper/322:50:133
2170998992825,2cyclictest0-21swapper/321:25:133
2170998992825,2cyclictest0-21swapper/320:35:153
217099899280,26cyclictest0-21swapper/323:25:133
217099899280,26cyclictest0-21swapper/300:25:133
2170996992826,1cyclictest0-21swapper/222:15:132
2170996992825,2cyclictest0-21swapper/222:10:122
2170996992825,2cyclictest0-21swapper/220:30:132
217099699280,26cyclictest0-21swapper/223:15:132
217099699280,26cyclictest0-21swapper/221:50:112
217099699280,26cyclictest0-21swapper/221:15:132
2170993992825,2cyclictest2171001-21latency_hist19:10:031
4577091270,7ptp4l61490irq/134-eno1-TxRx-022:55:013
4577091270,6ptp4l441ktimers/322:50:003
4577091270,6ptp4l441ktimers/320:05:003
4577091270,5ptp4l441ktimers/300:15:013
2170998992725,1cyclictest0-21swapper/323:51:003
2170998992725,1cyclictest0-21swapper/320:25:593
217099899270,26cyclictest0-21swapper/319:15:263
217099899270,1cyclictest0-21swapper/323:20:123
2170996992725,1cyclictest0-21swapper/221:49:592
2170996992725,1cyclictest0-21swapper/219:49:592
217099699270,25cyclictest0-21swapper/221:03:002
217099699270,1cyclictest0-21swapper/223:00:132
4577091260,7ptp4l61490irq/134-eno1-TxRx-023:15:013
4577091260,6ptp4l61490irq/134-eno1-TxRx-022:20:013
4577091260,6ptp4l441ktimers/323:20:003
4577091260,4ptp4l441ktimers/323:35:023
2170998992624,1cyclictest0-21swapper/323:36:593
2170998992624,1cyclictest0-21swapper/322:37:593
217099899260,2cyclictest0-21swapper/322:14:593
2170996992623,2cyclictest0-21swapper/219:21:122
2170996992623,2cyclictest0-21swapper/200:16:582
217099699260,24cyclictest0-21swapper/222:06:592
217099699260,24cyclictest0-21swapper/219:15:292
2170991992621,4cyclictest0-21swapper/019:10:020
4577091250,6ptp4l61490irq/134-eno1-TxRx-021:19:593
4577091250,5ptp4l61490irq/134-eno1-TxRx-021:15:013
4577091250,5ptp4l61490irq/134-eno1-TxRx-020:45:003
4577091250,4ptp4l441ktimers/319:55:003
4577091250,4ptp4l441ktimers/319:54:593
2170998992523,1cyclictest0-21swapper/321:05:593
2170998992523,1cyclictest0-21swapper/319:30:573
217099899250,24cyclictest0-21swapper/321:38:593
2170996992422,1cyclictest0-21swapper/222:30:002
2170996992320,2cyclictest0-21swapper/223:48:582
2170996992320,2cyclictest0-21swapper/223:30:592
2170996992219,2cyclictest0-21swapper/223:59:002
2170996992219,2cyclictest0-21swapper/221:05:112
2170996992219,2cyclictest0-21swapper/219:35:522
2170996992118,2cyclictest0-21swapper/219:55:592
2170996992018,1cyclictest0-21swapper/220:51:592
2170996991816,1cyclictest0-21swapper/221:41:582
2170996991816,1cyclictest0-21swapper/220:37:592
2170996991815,2cyclictest0-21swapper/222:23:592
217099699129,2cyclictest0-21swapper/221:21:582
217099699119,1cyclictest0-21swapper/223:24:552
21709969941,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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