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2026-08-12 - 05:37
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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 Wed Aug 12, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
338816599154143,8cyclictest1213033-21systemd-journal22:50:001
338816599154143,8cyclictest1213033-21systemd-journal22:50:001
338816599136123,9cyclictest1213033-21systemd-journal19:25:001
338816399132121,9cyclictest1213033-21systemd-journal21:35:000
338816399131114,5cyclictest3447476-21kworker/u8:0+events_unbound22:20:000
338816399130124,5cyclictest3477177-21kworker/u8:2+flush-179:023:50:000
338816399129122,4cyclictest3405857-21kworker/u8:3+flush-179:020:35:020
338816399128117,9cyclictest3428344-21apt-get21:11:440
338816399127118,6cyclictest3477177-21kworker/u8:2+events_unbound23:55:160
338816399127117,7cyclictest3436349-21latency_hist21:40:010
338816599126113,11cyclictest1213033-21systemd-journal23:35:001
338816599125115,7cyclictest3467373-21latency_hist23:15:001
338816399125115,7cyclictest3418804-21latency_hist20:45:010
338816599124114,7cyclictest3494774-21latency_hist00:40:011
338816599123113,6cyclictest1213033-21systemd-journal00:10:011
338816399119115,3cyclictest3394704-21kworker/u8:3+flush-179:019:50:220
338816399119106,10cyclictest1213033-21systemd-journal22:55:000
338816399118108,7cyclictest3440348-21kworker/u8:2+flush-179:022:10:140
338816399117109,5cyclictest3449146-21kworker/u8:3+events_unbound22:25:240
338816399117107,7cyclictest3440348-21kworker/u8:2+flush-179:022:05:210
338816399116111,4cyclictest3457349-21kworker/u8:3+events_unbound22:45:000
338816399116109,5cyclictest3412213-21kworker/u8:0+events_unbound20:50:000
338816599115104,8cyclictest1213033-21systemd-journal23:40:001
338816399115109,4cyclictest3456781-21kworker/u8:1+events_unbound22:45:240
338816399115109,4cyclictest3456781-21kworker/u8:1+events_unbound22:45:230
338816399115105,7cyclictest3399447-21latency_hist19:45:000
338816399114107,6cyclictest3420965-21kworker/u8:2+events_unbound20:55:230
338816399114105,6cyclictest3436327-21kworker/u8:1+flush-179:021:45:200
338816399113107,4cyclictest3457349-21kworker/u8:3+events_unbound23:10:000
338816399112103,6cyclictest3420965-21kworker/u8:2+events_unbound21:00:180
338816399112102,7cyclictest3462316-21kworker/u8:2+events_unbound23:10:220
338816399112102,7cyclictest3449111-21kworker/u8:2+events_unbound22:35:220
338816399112100,8cyclictest3467280-21kworker/u8:0+events_unbound23:35:140
338816399111105,4cyclictest3388059-21kworker/u8:1+flush-179:019:10:180
338816399111105,4cyclictest3388059-21kworker/u8:1+flush-179:019:10:180
338816399110104,5cyclictest3457349-21kworker/u8:3+events_unbound22:55:240
33881639910999,7cyclictest3436327-21kworker/u8:1+events_unbound21:50:220
338816399109101,5cyclictest3388059-21kworker/u8:1+events_unbound19:15:210
338816399108100,5cyclictest3436327-21kworker/u8:1+flush-179:021:55:150
33881639910799,6cyclictest3462316-21kworker/u8:2+flush-179:023:20:200
33881659910696,7cyclictest3457349-21kworker/u8:3+flush-179:023:00:131
33881639910696,7cyclictest3486797-21latency_hist00:15:010
33881659910596,6cyclictest3420388-21latency_hist20:50:011
33881639910599,4cyclictest3412213-21kworker/u8:0+flush-179:020:25:150
33881639910599,4cyclictest3404925-21kworker/u8:2+flush-179:020:10:250
33881639910590,6cyclictest3480608-21kworker/u8:0+flush-179:000:15:210
33881639910498,5cyclictest3477177-21kworker/u8:2+events_unbound00:05:270
33881639910497,5cyclictest3489469-21kworker/u8:2+flush-179:000:30:200
33881639910395,6cyclictest3434740-21kworker/u8:0+events_unbound21:40:240
33881659910292,8cyclictest3426991-21/usr/sbin/munin21:10:241
33881639910296,4cyclictest3457349-21kworker/u8:3+flush-179:023:00:230
33881639910296,4cyclictest3420965-21kworker/u8:2+events_unbound21:20:230
33881659910195,4cyclictest3478786-21latency_hist23:50:011
33881659910093,4cyclictest3480608-21kworker/u8:0+flush-179:000:00:241
33881659910091,7cyclictest3397267-21kworker/u8:0+flush-179:019:40:221
33881639910094,4cyclictest3449146-21kworker/u8:3+events_unbound22:30:270
3388163999991,5cyclictest3467280-21kworker/u8:0+events_unbound23:30:140
3388163999990,6cyclictest3430037-21kworker/u8:3+flush-179:021:25:230
3388163999989,7cyclictest3404925-21kworker/u8:2+flush-179:020:20:200
3388163999989,7cyclictest3404925-21kworker/u8:2+flush-179:020:20:200
3388165999884,11cyclictest3430037-21kworker/u8:3+flush-179:021:35:171
3388163999891,4cyclictest3388059-21kworker/u8:1+events_unbound19:35:210
3388163999792,4cyclictest3392814-21kworker/u8:2+flush-179:019:30:260
3388165999680,14cyclictest1213033-21systemd-journal00:25:001
3388163999689,5cyclictest3402601-21kworker/u8:0+flush-179:019:55:160
3388165999485,7cyclictest3462316-21kworker/u8:2+flush-179:023:20:001
3388165999478,12cyclictest3415361-21apt-get20:35:001
3388163999486,5cyclictest3440348-21kworker/u8:2+events_unbound22:00:190
3388165999282,7cyclictest1213033-21systemd-journal20:00:011
3388163999288,3cyclictest3482031-21kworker/u8:3+flush-179:000:04:020
3388163999287,4cyclictest3480608-21kworker/u8:0+flush-179:000:35:220
3388163999287,4cyclictest3405857-21kworker/u8:3+events_unbound20:15:260
3388165999167,20cyclictest3488403-21latency_hist00:20:011
3388163999186,4cyclictest3412213-21kworker/u8:0+events_unbound21:15:230
3388163999084,4cyclictest3388059-21kworker/u8:1+events_unbound19:25:120
3388163999083,4cyclictest3447476-21kworker/u8:0+events_unbound22:20:130
3388165998979,8cyclictest3409240-21apt-get20:15:131
3388163998982,5cyclictest3420965-21kworker/u8:2+flush-179:021:05:210
3388165998882,4cyclictest3415865-21apt-get20:35:131
3388165998877,7cyclictest3394704-21kworker/u8:3+events_unbound19:50:141
3388163998875,4cyclictest3405857-21kworker/u8:3+events_unbound20:30:210
3388165998780,5cyclictest3405857-21kworker/u8:3+flush-179:020:25:011
3388165998780,5cyclictest3405857-21kworker/u8:3+flush-179:020:25:001
3388163998773,7cyclictest3480608-21kworker/u8:0+events_unbound00:20:220
3388163998681,4cyclictest3388059-21kworker/u8:1+flush-179:020:00:300
3388163998680,4cyclictest3420965-21kworker/u8:2+flush-179:020:50:210
3388165998574,9cyclictest3477177-21kworker/u8:2+events_unbound00:10:231
3388165998379,3cyclictest3457349-21kworker/u8:3+flush-179:022:55:161
3388165998372,7cyclictest3388059-21kworker/u8:1+flush-179:019:35:221
3388165998371,9cyclictest3467280-21kworker/u8:0+flush-179:023:25:161
3388163998378,3cyclictest3394704-21kworker/u8:3+flush-179:019:45:140
3388163998373,7cyclictest3485198-21kworker/u8:1+events_unbound00:25:140
3388165998269,9cyclictest3467280-21kworker/u8:0+events_unbound23:40:251
3388163998276,4cyclictest3467280-21kworker/u8:0+events_unbound23:15:210
3388163998176,3cyclictest3467280-21kworker/u8:0+flush-179:023:25:120
3388163998074,4cyclictest3472394-21kworker/u8:1+events_unbound23:50:180
3388163998074,4cyclictest3404925-21kworker/u8:2+flush-179:020:05:220
3388165997971,5cyclictest3440348-21kworker/u8:2+events_unbound22:05:241
3388165997570,4cyclictest3472394-21kworker/u8:1+flush-179:023:50:161
3388165997465,6cyclictest3426755-21latency_hist21:10:021
3388165997366,5cyclictest3436327-21kworker/u8:1+flush-179:022:10:241
3388163997361,8cyclictest3388059-21kworker/u8:1+events_unbound19:20:130
3388165997262,8cyclictest3467280-21kworker/u8:0+flush-179:023:25:001
3388165997262,7cyclictest3436327-21kworker/u8:1+flush-179:022:15:251
3388165997164,5cyclictest3440348-21kworker/u8:2+flush-179:022:00:241
3388165997159,10cyclictest3436327-21kworker/u8:1+flush-179:021:40:221
3388165997158,9cyclictest3420965-21kworker/u8:2+events_unbound21:20:291
3388165997064,4cyclictest3420965-21kworker/u8:2+flush-179:021:30:271
3388165997061,7cyclictest3449111-21kworker/u8:2+flush-179:022:20:211
3388165997059,8cyclictest3462316-21kworker/u8:2+flush-179:023:05:161
3388165996957,8cyclictest3388059-21kworker/u8:1+flush-179:019:25:151
3388163996964,4cyclictest3467280-21kworker/u8:0+events_unbound23:40:270
3388165996856,9cyclictest3460615-21store22:55:011
3388165996763,1cyclictest3452268-21latency_hist22:30:001
3388165996755,8cyclictest3489469-21kworker/u8:2+flush-179:000:30:211
4577091660,19ptp4l441ktimers/319:06:233
338816599660,64cyclictest714-21Xorg20:43:001
3388165996557,5cyclictest3436327-21kworker/u8:1+flush-179:021:50:201
3388165996555,7cyclictest3388014-21latency_hist19:10:021
3388165996459,4cyclictest3404925-21kworker/u8:2+flush-179:020:10:171
3388165996454,8cyclictest3404925-21kworker/u8:2+events_unbound20:00:251
3388165996357,4cyclictest3412213-21kworker/u8:0+flush-179:020:25:211
3388165996252,8cyclictest3455981-21apt-get22:40:111
3388165996154,5cyclictest3430037-21kworker/u8:3+flush-179:021:25:211
3388165996154,4cyclictest3420965-21kworker/u8:2+flush-179:021:00:231
3388165996150,8cyclictest1213033-21systemd-journal21:59:591
3388165996050,8cyclictest1213033-21systemd-journal21:50:001
3388165995951,5cyclictest3394924-21apt-get19:30:121
3388165995750,5cyclictest3407399-21latency_hist20:10:011
3388165995650,5cyclictest3412213-21kworker/u8:0+flush-179:021:15:231
3388165995643,11cyclictest3422515-21diskstats20:55:161
3388170995548,5cyclictest3491601-21turbostat00:30:003
3388165995547,5cyclictest3485198-21kworker/u8:1+flush-179:000:25:161
3388165995343,7cyclictest1213033-21systemd-journal22:35:001
3388165995241,9cyclictest3420965-21kworker/u8:2+events_unbound20:50:201
3388165994741,4cyclictest3394704-21kworker/u8:3+flush-179:019:45:181
3388165994540,4cyclictest3388059-21kworker/u8:1+events_unbound19:15:231
3388169994441,2cyclictest0-21swapper/220:43:002
3388165994230,9cyclictest1213033-21systemd-journal00:00:011
3388165994227,14cyclictest0-21swapper/122:36:591
338817099410,39cyclictest3408998-21turbostat20:15:003
338816999380,35cyclictest0-21swapper/219:28:592
3388165993833,4cyclictest3384792-21kworker/u8:3+flush-179:019:10:261
3388165993833,4cyclictest3384792-21kworker/u8:3+flush-179:019:10:261
4577091370,3ptp4l441ktimers/323:00:023
3388170993734,2cyclictest0-21swapper/322:22:583
3388170993734,2cyclictest0-21swapper/300:23:593
3388170993731,5cyclictest3453863-21turbostat22:35:013
3388169993735,1cyclictest0-21swapper/221:09:582
338816999370,35cyclictest0-21swapper/222:55:012
338816999370,35cyclictest0-21swapper/222:17:002
338816999370,35cyclictest0-21swapper/221:01:592
3388170993633,2cyclictest0-21swapper/322:19:583
338817099360,35cyclictest0-21swapper/323:51:583
338817099360,35cyclictest0-21swapper/300:32:593
3388169993633,2cyclictest0-21swapper/223:58:592
3388169993633,2cyclictest0-21swapper/222:59:542
3388169993532,2cyclictest0-21swapper/223:16:002
3388169993532,2cyclictest0-21swapper/221:39:592
3388169993531,2cyclictest0-21swapper/222:44:552
338816999350,33cyclictest0-21swapper/220:55:142
338816999350,33cyclictest0-21swapper/220:45:152
338816999350,33cyclictest0-21swapper/220:35:162
3388170993432,1cyclictest0-21swapper/322:49:003
3388170993432,1cyclictest0-21swapper/322:48:593
3388169993432,1cyclictest0-21swapper/200:30:002
3388169993431,2cyclictest0-21swapper/221:54:552
3388169993431,2cyclictest0-21swapper/200:13:592
3388169993430,2cyclictest0-21swapper/219:57:592
338816999340,32cyclictest0-21swapper/221:15:142
338816999340,32cyclictest0-21swapper/221:10:142
3388170993331,1cyclictest0-21swapper/322:52:583
3388170993331,1cyclictest0-21swapper/321:39:563
3388170993331,1cyclictest0-21swapper/321:28:003
3388170993331,1cyclictest0-21swapper/320:04:593
3388170993331,1cyclictest0-21swapper/319:32:593
3388170993330,2cyclictest0-21swapper/321:06:593
3388170993330,2cyclictest0-21swapper/319:58:593
3388170993329,3cyclictest431rcuc/320:39:553
3388169993326,6cyclictest0-21swapper/220:05:212
4577091320,7ptp4l441ktimers/319:50:003
3388170993230,1cyclictest0-21swapper/322:15:003
3388170993230,1cyclictest0-21swapper/320:44:563
3388170993230,1cyclictest0-21swapper/320:06:593
3388170993229,2cyclictest0-21swapper/319:20:593
3388169993230,1cyclictest0-21swapper/219:49:582
3388169993226,5cyclictest0-21swapper/220:50:592
3388169993225,6cyclictest0-21swapper/200:30:132
338816999320,30cyclictest0-21swapper/223:30:132
338816999320,30cyclictest0-21swapper/220:23:592
338816999320,30cyclictest0-21swapper/220:23:582
338816999320,30cyclictest0-21swapper/219:54:592
4577091310,7ptp4l441ktimers/323:45:003
3388170993129,1cyclictest0-21swapper/323:36:583
3388170993129,1cyclictest0-21swapper/323:27:593
3388170993129,1cyclictest0-21swapper/320:28:593
338817099310,1cyclictest0-21swapper/322:30:003
3388169993128,2cyclictest0-21swapper/220:16:592
338816999310,29cyclictest0-21swapper/219:30:132
4577091300,7ptp4l441ktimers/321:25:013
4577091300,7ptp4l441ktimers/300:05:003
4577091300,6ptp4l441ktimers/319:45:003
3388170993028,1cyclictest0-21swapper/319:13:593
3388170993028,1cyclictest0-21swapper/319:13:593
3388170993027,2cyclictest0-21swapper/320:17:583
3388170993027,2cyclictest0-21swapper/300:35:143
338817099300,28cyclictest0-21swapper/321:40:143
3388169993028,1cyclictest0-21swapper/200:24:562
3388169993027,2cyclictest0-21swapper/223:45:152
3388169993027,2cyclictest0-21swapper/220:30:582
3388169993027,2cyclictest0-21swapper/220:25:142
3388169993023,6cyclictest0-21swapper/222:38:592
3388169993022,7cyclictest0-21swapper/223:41:592
4577091290,6ptp4l61490irq/134-eno1-TxRx-000:15:003
4577091290,6ptp4l441ktimers/322:00:003
4577091290,6ptp4l441ktimers/319:55:013
3388170992926,2cyclictest0-21swapper/300:05:163
338817099290,27cyclictest3396268-21turbostat19:39:563
338817099290,27cyclictest0-21swapper/320:45:143
338817099290,27cyclictest0-21swapper/319:25:033
3388169992927,1cyclictest0-21swapper/219:39:592
3388169992926,2cyclictest0-21swapper/223:50:142
3388169992926,2cyclictest0-21swapper/220:00:172
338816999290,2cyclictest0-21swapper/223:05:152
338816999290,27cyclictest0-21swapper/223:35:122
338816999290,27cyclictest0-21swapper/223:20:012
338816999290,27cyclictest0-21swapper/221:55:122
338816999290,27cyclictest0-21swapper/200:15:142
338816999290,27cyclictest0-21swapper/200:00:142
4577091280,6ptp4l61490irq/134-eno1-TxRx-022:10:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-021:20:003
4577091280,6ptp4l441ktimers/323:50:013
4577091280,6ptp4l441ktimers/323:34:563
4577091280,6ptp4l441ktimers/321:55:003
4577091280,5ptp4l441ktimers/323:15:013
3388170992825,2cyclictest0-21swapper/323:55:153
3388170992825,2cyclictest0-21swapper/322:40:023
3388170992824,2cyclictest0-21swapper/319:16:593
338817099280,27cyclictest0-21swapper/323:20:013
338817099280,27cyclictest0-21swapper/320:55:143
338817099280,26cyclictest0-21swapper/323:00:033
338817099280,26cyclictest0-21swapper/320:20:143
338817099280,26cyclictest0-21swapper/320:20:143
3388169992825,2cyclictest0-21swapper/219:10:122
3388169992825,2cyclictest0-21swapper/219:10:122
338816999280,26cyclictest0-21swapper/222:29:592
338816999280,26cyclictest0-21swapper/221:20:582
4577091270,6ptp4l441ktimers/320:35:013
4577091270,5ptp4l441ktimers/323:09:563
4577091270,5ptp4l441ktimers/321:15:003
4577091270,5ptp4l441ktimers/320:55:013
3388170992725,1cyclictest0-21swapper/323:20:013
3388170992725,1cyclictest0-21swapper/321:00:133
3388170992725,1cyclictest0-21swapper/300:15:593
338816999270,2cyclictest0-21swapper/221:31:592
338816999270,19cyclictest0-21swapper/222:08:582
4577091260,5ptp4l61490irq/134-eno1-TxRx-022:39:553
338817099260,1cyclictest0-21swapper/321:45:123
338816999260,2cyclictest0-21swapper/221:29:562
338816999260,1cyclictest0-21swapper/222:04:592
231999260,13rtkit-daemon3387506-21ntp_states19:05:250
3388169992523,1cyclictest0-21swapper/222:12:592
3388169992522,2cyclictest0-21swapper/221:47:592
3388169992522,2cyclictest0-21swapper/221:42:002
3388169992522,2cyclictest0-21swapper/219:43:592
3388169992522,2cyclictest0-21swapper/219:17:592
338816999250,2cyclictest0-21swapper/222:34:552
3388169992422,1cyclictest0-21swapper/223:30:002
3388169992422,1cyclictest0-21swapper/223:01:002
3388169992421,2cyclictest0-21swapper/220:14:592
3388170992321,1cyclictest0-21swapper/322:00:593
3388169992321,1cyclictest0-21swapper/200:09:592
3388169992220,1cyclictest0-21swapper/222:46:002
3388169992220,1cyclictest0-21swapper/222:45:592
3388169992118,2cyclictest0-21swapper/222:24:552
3388170991715,1cyclictest0-21swapper/321:33:583
3388169991715,1cyclictest0-21swapper/200:39:592
3388169991613,2cyclictest0-21swapper/223:10:132
338816999130,10cyclictest0-21swapper/219:25:002
33881699980,7cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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