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2026-07-18 - 15:05
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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 Sat Jul 18, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
258433799142130,8cyclictest2610495-21latency_hist20:30:010
258433799138128,7cyclictest2679777-21latency_hist00:05:010
258433799128118,7cyclictest2605469-21apt-get20:15:000
258433799126115,8cyclictest2672850-21apt-get23:45:010
258434299121108,10cyclictest2595660-21latency_hist19:45:021
25843379911791,17cyclictest2618685-21/usr/sbin/munin20:55:240
258434299112103,7cyclictest2591120-21/usr/sbin/munin19:30:231
258434299112103,6cyclictest2684774-21kworker/u8:0+flush-179:000:25:151
25843429911198,10cyclictest1213033-21systemd-journal22:30:011
258434299111102,6cyclictest2677936-21kworker/u8:3+events_unbound00:05:141
258434299110100,7cyclictest1213033-21systemd-journal20:35:001
25843379910791,14cyclictest2602540-21apt-get20:05:110
25843379910790,14cyclictest2612338-21apt-get20:35:120
25843429910698,6cyclictest2587947-21kworker/u8:0+flush-179:019:45:221
25843429910598,4cyclictest2612073-21kworker/u8:2+flush-179:020:55:241
25843429910597,5cyclictest2674713-21kworker/u8:2+flush-179:000:00:011
25843429910597,5cyclictest2642587-21latency_hist22:10:011
25843429910596,6cyclictest2669641-21latency_hist23:35:001
25843429910595,7cyclictest2602286-21latency_hist20:05:011
25843429910294,6cyclictest2587947-21kworker/u8:0+flush-179:019:25:221
25843379910292,8cyclictest1213033-21systemd-journal22:15:010
25843429910092,6cyclictest2647347-21kworker/u8:0+flush-179:022:25:001
2584337999989,8cyclictest2660355-21apt-get23:05:100
2584337999989,7cyclictest2653779-21kworker/u8:3+flush-179:022:50:210
2584337999986,8cyclictest2671284-21kworker/u8:0+flush-179:023:45:210
2584342999892,4cyclictest2653779-21kworker/u8:3+flush-179:022:50:151
2584342999789,5cyclictest2636218-21kworker/u8:0+flush-179:022:00:171
2584337999791,4cyclictest2587947-21kworker/u8:0+events_unbound19:50:240
2584342999589,4cyclictest2624847-21kworker/u8:2+events_unbound21:20:131
2584342999586,7cyclictest2605970-21apt-get20:15:121
2584337999587,5cyclictest2599079-21kworker/u8:3+flush-179:020:00:150
2584342999384,6cyclictest2637531-21kworker/u8:1+events_unbound21:55:021
2584342999382,8cyclictest2584513-21apt-get19:10:101
2584342999284,6cyclictest2671284-21kworker/u8:0+flush-179:000:00:021
2584342999282,7cyclictest2656940-21kworker/u8:2+flush-179:023:00:221
2584342999182,7cyclictest2645763-21latency_hist22:20:001
2584337999183,6cyclictest2677936-21kworker/u8:3+flush-179:000:05:210
2584337999081,6cyclictest2616863-21latency_hist20:50:010
2584337999080,7cyclictest2636218-21kworker/u8:0+flush-179:021:50:230
2584337999079,8cyclictest2631176-21kworker/u8:3+flush-179:022:00:220
2584342998983,4cyclictest2624847-21kworker/u8:2+flush-179:021:25:171
2584342998782,4cyclictest2636218-21kworker/u8:0+flush-179:022:10:161
2584342998778,7cyclictest2637531-21kworker/u8:1+flush-179:021:55:011
2584337998783,3cyclictest2636218-21kworker/u8:0+flush-179:021:55:270
2584342998679,5cyclictest2587947-21kworker/u8:0+events_unbound19:20:231
2584337998679,5cyclictest2666454-21kworker/u8:2+flush-179:023:30:220
2584337998676,7cyclictest2587947-21kworker/u8:0+flush-179:019:25:210
2584342998575,7cyclictest2671241-21latency_hist23:40:011
2584337998577,6cyclictest2625069-21apt-get21:15:130
2584337998574,9cyclictest1213033-21systemd-journal21:10:000
2584337998573,9cyclictest2617871-21kworker/u8:1+flush-179:021:00:210
2584337998573,9cyclictest2617871-21kworker/u8:1+flush-179:021:00:200
2584347998476,6cyclictest2666488-21turbostat23:25:013
2584342998478,4cyclictest2681392-21kworker/u8:1+flush-179:000:15:251
2584342998478,4cyclictest2666454-21kworker/u8:2+events_unbound23:25:001
2584337998376,4cyclictest2648933-21kworker/u8:2+events_unbound22:35:010
2584337998375,5cyclictest2664840-21kworker/u8:1+flush-179:023:55:210
2584342998276,4cyclictest2653779-21kworker/u8:3+flush-179:022:55:241
2584342998275,5cyclictest2648933-21kworker/u8:2+flush-179:022:35:201
2584342998275,5cyclictest2648933-21kworker/u8:2+flush-179:022:35:201
2584342998274,5cyclictest2684774-21kworker/u8:0+flush-179:000:30:161
2584342998175,4cyclictest2617871-21kworker/u8:1+flush-179:020:55:001
2584342998172,6cyclictest2659744-21kworker/u8:0+flush-179:023:05:211
2584337998174,5cyclictest2590924-21kworker/u8:2+flush-179:019:55:280
2584342998073,4cyclictest2590924-21kworker/u8:2+flush-179:019:55:241
2584337998073,4cyclictest2663272-21latency_hist23:15:010
2584337998072,5cyclictest2653779-21kworker/u8:3+flush-179:022:55:260
2584337998059,18cyclictest2626679-21apt-get21:20:110
2584342997872,4cyclictest2631210-21kworker/u8:4+flush-179:021:35:211
2584337997872,5cyclictest2579446-21kworker/u8:2+flush-179:019:10:210
2584337997872,4cyclictest2684774-21kworker/u8:0+flush-179:000:35:170
2584342997760,4cyclictest2584289-21kworker/u8:3+flush-179:019:15:171
2584337997769,5cyclictest2624847-21kworker/u8:2+flush-179:021:30:220
2584337997671,4cyclictest2666454-21kworker/u8:2+flush-179:023:25:290
2584337997671,4cyclictest2666454-21kworker/u8:2+flush-179:023:25:280
2584337997667,6cyclictest2603910-21kworker/u8:0+flush-179:020:20:210
2584342997567,5cyclictest2597227-21kworker/u8:1+flush-179:020:05:151
2584342997469,4cyclictest2664840-21kworker/u8:1+flush-179:023:40:221
2584342997468,4cyclictest2631176-21kworker/u8:3+flush-179:021:50:011
2584337997467,5cyclictest2642108-21kworker/u8:1+events_unbound22:25:250
2584337997460,12cyclictest2617871-21kworker/u8:1+flush-179:021:40:250
2584337997166,3cyclictest2584289-21kworker/u8:3+flush-179:019:15:250
2584337997164,5cyclictest2681392-21kworker/u8:1+flush-179:000:10:210
2584337997065,4cyclictest2653779-21kworker/u8:3+flush-179:023:15:230
2584342996963,4cyclictest2681392-21kworker/u8:1+events_unbound00:15:011
2584342996960,7cyclictest2624847-21kworker/u8:2+flush-179:021:30:201
2584342996958,9cyclictest2617871-21kworker/u8:1+events_unbound21:10:201
258434299691,64cyclictest1-21systemd20:25:001
2584342996858,8cyclictest2592724-21apt-get19:35:111
2584337996862,5cyclictest2612073-21kworker/u8:2+flush-179:020:50:290
2584337996860,5cyclictest2659744-21kworker/u8:0+flush-179:023:20:160
2584342996760,5cyclictest2666454-21kworker/u8:2+events_unbound23:30:021
2584342996760,5cyclictest2666454-21kworker/u8:2+events_unbound23:30:021
2584342996760,5cyclictest2603910-21kworker/u8:0+events_unbound20:10:231
2584342996759,6cyclictest2684774-21kworker/u8:0+events_unbound00:20:251
2584342996660,4cyclictest2664840-21kworker/u8:1+events_unbound23:55:021
2584337996660,3cyclictest2684774-21kworker/u8:0+flush-179:000:25:210
2584337996658,6cyclictest2684774-21kworker/u8:0+flush-179:000:30:180
2584337996654,9cyclictest1213033-21systemd-journal21:30:000
2584342996560,4cyclictest2612073-21kworker/u8:2+flush-179:020:48:291
2584337996557,6cyclictest2610480-21kworker/u8:0+flush-179:020:30:160
2584337996556,7cyclictest1213033-21systemd-journal19:40:000
2584337996553,9cyclictest2683463-21apt-get00:15:130
2584347996462,1cyclictest0-21swapper/320:24:593
2584342996458,4cyclictest2599079-21kworker/u8:3+events_unbound20:35:181
2584337996458,4cyclictest2650522-21kworker/u8:1+flush-179:022:35:130
2584337996458,4cyclictest2650522-21kworker/u8:1+flush-179:022:35:130
2584337996456,6cyclictest2590924-21kworker/u8:2+events_unbound19:45:010
2584337996455,7cyclictest2607308-21latency_hist20:20:010
2584337996455,7cyclictest1213033-21systemd-journal19:30:280
2584342996357,5cyclictest2650522-21kworker/u8:1+flush-179:022:45:151
2584342996357,4cyclictest2599079-21kworker/u8:3+flush-179:020:25:231
2584337996357,4cyclictest2684774-21kworker/u8:0+flush-179:000:25:010
2584343996235,26cyclictest0-21swapper/223:48:002
2584342996257,4cyclictest2659744-21kworker/u8:0+flush-179:023:10:231
2584337996259,2cyclictest2642610-21kworker/u8:2+events_unbound22:20:220
2584337996255,5cyclictest2648933-21kworker/u8:2+events_unbound22:40:160
2584337996254,6cyclictest2655320-21latency_hist22:50:010
258433799611,57cyclictest2589334-21munin-run19:25:000
2584342995845,5cyclictest2684774-21kworker/u8:0+events_unbound00:35:241
2584337995653,2cyclictest2631210-21kworker/u8:4+events_unbound21:45:260
2584337995650,4cyclictest2612069-21kworker/u8:1+flush-179:020:40:220
2584342995550,4cyclictest2617871-21kworker/u8:1+flush-179:021:00:221
2584342995550,4cyclictest2617871-21kworker/u8:1+flush-179:021:00:221
2584342995550,4cyclictest2617871-21kworker/u8:1+events_unbound21:40:131
2584337995549,5cyclictest2664840-21kworker/u8:1+flush-179:023:35:160
2584342995341,10cyclictest2652405-21apt-get22:40:111
2584337995146,4cyclictest2664840-21kworker/u8:1+flush-179:023:50:220
2584337995145,4cyclictest2636218-21kworker/u8:0+flush-179:022:05:140
4577091490,12ptp4l441ktimers/319:09:553
2584342994944,4cyclictest2648933-21kworker/u8:2+events_unbound22:30:251
2584342994944,4cyclictest2618483-21kworker/u8:3+events_unbound21:05:261
2584342994941,5cyclictest2615277-21latency_hist20:45:001
2584337994845,2cyclictest2623464-21kworker/u8:0+flush-179:021:11:280
2584337994842,4cyclictest2642610-21kworker/u8:2+flush-179:022:15:200
2584337994639,4cyclictest2660100-21latency_hist23:05:020
2584342994438,5cyclictest2653779-21kworker/u8:3+flush-179:023:15:211
2584347994235,5cyclictest2624828-21turbostat21:15:003
2584342994234,6cyclictest2590924-21kworker/u8:2+events_unbound19:50:021
2584347994139,1cyclictest0-21swapper/300:28:583
2584342994035,4cyclictest714-21Xorg23:45:581
2584342994033,5cyclictest2617871-21kworker/u8:1+flush-179:021:15:151
2584337994034,5cyclictest2631210-21kworker/u8:4+events_unbound21:35:250
2584343993936,2cyclictest0-21swapper/219:12:592
2584343993935,2cyclictest0-21swapper/219:18:592
258434399390,36cyclictest0-21swapper/221:08:002
258434799380,37cyclictest0-21swapper/300:32:003
258434399380,35cyclictest0-21swapper/222:30:002
258434399380,35cyclictest0-21swapper/220:00:002
2584347993734,2cyclictest0-21swapper/322:15:593
2584347993721,14cyclictest2637554-21turbostat21:55:003
2584343993735,1cyclictest0-21swapper/223:19:592
2584343993734,2cyclictest0-21swapper/222:10:592
2584343993733,2cyclictest0-21swapper/221:11:592
258434399370,35cyclictest0-21swapper/222:42:582
2584347993634,1cyclictest0-21swapper/323:05:003
2584347993634,1cyclictest0-21swapper/320:57:593
2584347993634,1cyclictest0-21swapper/320:05:003
2584347993634,1cyclictest0-21swapper/300:12:583
2584347993633,2cyclictest0-21swapper/320:42:593
258434799360,35cyclictest0-21swapper/323:18:003
258434799360,1cyclictest0-21swapper/323:58:583
2584343993633,2cyclictest0-21swapper/222:49:552
2584347993533,1cyclictest0-21swapper/322:34:003
2584347993533,1cyclictest0-21swapper/321:24:593
258434799350,1cyclictest0-21swapper/300:24:553
2584343993533,1cyclictest0-21swapper/219:40:002
2584343993532,2cyclictest0-21swapper/223:41:582
2584343993532,2cyclictest0-21swapper/222:05:592
2584343993532,2cyclictest0-21swapper/221:31:592
2584343993532,2cyclictest0-21swapper/221:18:592
2584347993432,1cyclictest0-21swapper/322:12:593
2584347993432,1cyclictest0-21swapper/320:29:593
2584347993432,1cyclictest0-21swapper/319:51:593
2584347993432,1cyclictest0-21swapper/319:28:003
258434799340,33cyclictest0-21swapper/319:35:123
231999340,5rtkit-daemon495-21gpm19:49:400
2584347993331,1cyclictest0-21swapper/322:29:593
2584347993331,1cyclictest0-21swapper/320:09:553
2584343993330,2cyclictest0-21swapper/220:46:582
2584347993230,1cyclictest0-21swapper/321:43:593
2584347993230,1cyclictest0-21swapper/320:36:593
258434799320,31cyclictest0-21swapper/321:08:593
258434799320,30cyclictest0-21swapper/322:54:583
2584343993230,1cyclictest0-21swapper/200:29:592
2584347993128,2cyclictest0-21swapper/320:10:593
258434799310,30cyclictest0-21swapper/300:15:153
2584343993129,1cyclictest0-21swapper/220:25:002
2584343993128,2cyclictest0-21swapper/222:18:002
2584343993128,2cyclictest0-21swapper/220:38:592
2584347993028,1cyclictest0-21swapper/322:38:593
2584347993028,1cyclictest0-21swapper/322:38:593
2584347993028,1cyclictest0-21swapper/319:56:593
2584347993027,2cyclictest0-21swapper/321:39:553
2584347993027,2cyclictest0-21swapper/300:00:023
2584347993023,6cyclictest0-21swapper/322:00:593
258434799300,2cyclictest0-21swapper/319:16:583
258434799300,1cyclictest0-21swapper/323:41:593
2584343993028,1cyclictest0-21swapper/223:10:002
2584343993027,2cyclictest0-21swapper/220:40:132
2584343993027,2cyclictest0-21swapper/200:08:592
2584343993026,2cyclictest0-21swapper/223:37:002
258434399300,2cyclictest0-21swapper/223:28:592
258434399300,2cyclictest0-21swapper/223:28:582
258434399300,2cyclictest0-21swapper/200:00:032
258434399300,28cyclictest0-21swapper/219:50:042
258434399300,28cyclictest0-21swapper/200:30:112
258434399300,1cyclictest0-21swapper/220:10:002
4577091290,6ptp4l441ktimers/321:50:013
4577091290,6ptp4l441ktimers/320:35:003
2584347992927,1cyclictest0-21swapper/322:55:153
2584347992926,2cyclictest0-21swapper/323:35:123
2584347992926,2cyclictest0-21swapper/321:55:013
2584347992925,2cyclictest0-21swapper/323:05:133
258434799290,27cyclictest0-21swapper/300:05:133
2584343992926,2cyclictest0-21swapper/219:20:022
2584343992925,2cyclictest0-21swapper/200:19:552
2584343992925,2cyclictest0-21swapper/200:10:132
258434399290,2cyclictest0-21swapper/223:55:112
258434399290,27cyclictest0-21swapper/222:50:132
258434399290,27cyclictest0-21swapper/221:55:022
258434399290,27cyclictest0-21swapper/221:40:132
258434399290,27cyclictest0-21swapper/221:35:122
258434399290,27cyclictest0-21swapper/220:15:022
4577091280,7ptp4l441ktimers/321:05:023
4577091280,7ptp4l441ktimers/321:05:013
4577091280,6ptp4l441ktimers/322:49:553
4577091280,6ptp4l441ktimers/319:45:003
2584347992825,2cyclictest0-21swapper/320:45:133
2584347992825,2cyclictest0-21swapper/300:35:133
258434799280,27cyclictest0-21swapper/320:15:033
258434799280,26cyclictest0-21swapper/323:25:143
258434799280,26cyclictest0-21swapper/323:25:133
258434799280,26cyclictest0-21swapper/322:40:133
2584343992825,2cyclictest0-21swapper/223:53:592
2584343992825,2cyclictest0-21swapper/221:50:142
2584343992825,2cyclictest0-21swapper/221:00:132
2584343992825,2cyclictest0-21swapper/221:00:132
2584343992825,2cyclictest0-21swapper/220:33:582
258434399280,26cyclictest0-21swapper/222:30:122
2584342992823,4cyclictest2584461-21latency_hist19:10:031
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:50:023
4577091270,6ptp4l441ktimers/323:49:563
4577091270,6ptp4l441ktimers/323:35:013
4577091270,5ptp4l441ktimers/320:55:003
2584347992725,1cyclictest0-21swapper/319:20:013
258434799270,26cyclictest0-21swapper/321:15:133
2584343992725,1cyclictest0-21swapper/220:14:592
2584343992724,2cyclictest0-21swapper/223:10:142
2584343992724,2cyclictest0-21swapper/222:20:122
258434399270,1cyclictest0-21swapper/221:45:132
4577091260,6ptp4l441ktimers/321:34:553
4577091260,5ptp4l61490irq/134-eno1-TxRx-022:10:003
2584343992624,1cyclictest0-21swapper/223:35:002
2584343992624,1cyclictest0-21swapper/219:29:582
258434399260,2cyclictest0-21swapper/219:33:592
4577091250,5ptp4l61490irq/134-eno1-TxRx-019:34:563
4577091250,5ptp4l61490irq/134-eno1-TxRx-019:14:563
2584343992523,1cyclictest0-21swapper/220:29:592
2584343992522,2cyclictest0-21swapper/222:36:592
2584343992522,2cyclictest0-21swapper/222:36:592
2584343992522,2cyclictest0-21swapper/200:38:002
2584343992521,2cyclictest0-21swapper/223:04:002
4577091240,4ptp4l61490irq/134-eno1-TxRx-023:54:553
4577091240,4ptp4l61490irq/134-eno1-TxRx-022:24:553
4577091240,4ptp4l441ktimers/321:29:563
2584343992321,1cyclictest0-21swapper/223:24:592
2584343992320,2cyclictest0-21swapper/219:45:132
2584337992219,2cyclictest1372798-1kworker/0:0H+kblockd19:10:010
2584347992119,1cyclictest0-21swapper/323:10:593
2584343991916,2cyclictest0-21swapper/200:24:002
2584343991815,2cyclictest0-21swapper/220:56:592
2584343991613,2cyclictest0-21swapper/222:59:582
2584343991511,2cyclictest2629613-21turbostat21:30:002
2584343991210,1cyclictest0-21swapper/220:04:592
258434399119,1cyclictest0-21swapper/221:24:592
258434399118,2cyclictest0-21swapper/220:52:592
25843439996,2cyclictest0-21swapper/219:44:552
25843439985,2cyclictest0-21swapper/222:00:132
25843439940,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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