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2026-03-24 - 08:16
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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 Mar 24, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3385359991121,109cyclictest1-21systemd00:20:000
33853599910798,7cyclictest3395490-21kworker/u8:1+events_unbound19:50:020
33853599910698,6cyclictest3482120-21kworker/u8:2+events_unbound00:30:010
33853599910696,8cyclictest3435082-21kworker/u8:0+flush-179:022:40:000
3385359999888,7cyclictest266-21systemd-journal00:04:000
3385359999791,5cyclictest3438308-21kworker/u8:3+flush-179:022:50:240
3385359998982,5cyclictest3420824-21kworker/u8:2+events_unbound21:10:220
3385359998980,7cyclictest3420771-21latency_hist21:00:000
3385361998776,9cyclictest3478861-40mandb00:00:011
3385359998782,3cyclictest3424006-21kworker/u8:3+flush-179:021:25:250
3385359998777,4cyclictest3462643-21kworker/u8:2+events_unbound23:40:240
3385361998678,6cyclictest3427109-21kworker/u8:1+flush-179:021:45:001
3385359998681,4cyclictest3427109-21kworker/u8:1+flush-179:021:30:250
3385359998576,7cyclictest3397998-21apt-get19:50:000
3385361998475,6cyclictest3486855-21latency_hist00:25:011
3385359998480,3cyclictest3474112-21kworker/u8:1+flush-179:000:35:260
3385359998479,4cyclictest3393181-21kworker/u8:0+events_unbound19:35:260
3385359998378,3cyclictest3462643-21kworker/u8:2+flush-179:023:55:200
3385359998377,4cyclictest3438308-21kworker/u8:3+flush-179:022:45:240
3385359998373,4cyclictest3462643-21kworker/u8:2+flush-179:023:10:220
3385359998278,3cyclictest3406484-21kworker/u8:3+flush-179:020:15:250
3385359998175,5cyclictest3462643-21kworker/u8:2+events_unbound23:25:230
3385359998172,3cyclictest3424006-21kworker/u8:3+flush-179:021:20:250
3385359998075,4cyclictest3435082-21kworker/u8:0+events_unbound22:10:260
3385359998075,4cyclictest3403518-21kworker/u8:0+flush-179:020:10:250
3385359997974,4cyclictest3461054-21kworker/u8:1+events_unbound23:05:230
3385359997974,4cyclictest3427109-21kworker/u8:1+events_unbound21:35:240
3385359997974,4cyclictest3406484-21kworker/u8:3+flush-179:020:50:270
3385359997873,3cyclictest3474112-21kworker/u8:1+flush-179:023:45:210
3385359997772,4cyclictest3474112-21kworker/u8:1+flush-179:023:50:240
3385359997670,4cyclictest3415986-21kworker/u8:1+events_unbound21:00:240
3385361997467,5cyclictest3462643-21kworker/u8:2+flush-179:023:55:001
3385359997469,4cyclictest3382417-21kworker/u8:2+flush-179:019:15:150
3385359997465,4cyclictest3412805-21kworker/u8:0+events_unbound20:40:220
3385359997364,6cyclictest3482076-21latency_hist00:10:010
3385359997268,3cyclictest3462643-21kworker/u8:2+events_unbound23:30:230
3385359997267,4cyclictest3435082-21kworker/u8:0+flush-179:022:00:210
3385359997267,4cyclictest3435082-21kworker/u8:0+flush-179:022:00:210
3385359997267,4cyclictest3406484-21kworker/u8:3+flush-179:020:35:270
3385359997263,3cyclictest3435082-21kworker/u8:0+flush-179:022:05:240
3385361997158,8cyclictest510-21rs:main1
3385359997167,3cyclictest3470869-21kworker/u8:3+events_unbound23:39:560
3385359997166,4cyclictest3435082-21kworker/u8:0+events_unbound21:55:210
3385359997166,4cyclictest3399814-21kworker/u8:2+events_unbound19:55:250
3385359997166,4cyclictest3395490-21kworker/u8:1+events_unbound19:40:200
3385359997165,4cyclictest3438308-21kworker/u8:3+flush-179:022:40:210
3385359997063,5cyclictest3435342-21/usr/sbin/munin21:45:230
3385359996964,4cyclictest3482120-21kworker/u8:2+events_unbound00:20:210
3385359996964,4cyclictest3406484-21kworker/u8:3+flush-179:020:20:220
3385359996962,5cyclictest3385269-21kworker/u8:3+events_unbound19:10:200
3385359996864,3cyclictest3427109-21kworker/u8:1+events_unbound21:40:210
3385359996762,4cyclictest3448330-21kworker/u8:1+flush-179:022:25:260
3385359996762,4cyclictest3438308-21kworker/u8:3+events_unbound22:20:260
3385359996762,4cyclictest3399814-21kworker/u8:2+events_unbound20:25:260
3385359996757,4cyclictest3399814-21kworker/u8:2+flush-179:020:05:130
3385361996659,5cyclictest3399814-21kworker/u8:2+flush-179:020:30:021
3385361996657,7cyclictest266-21systemd-journal23:05:011
3385361996652,12cyclictest3399814-21kworker/u8:2+flush-179:020:19:541
3385359996657,4cyclictest3474112-21kworker/u8:1+events_unbound00:10:220
3385359996560,4cyclictest3438308-21kworker/u8:3+events_unbound22:15:230
3385359996560,4cyclictest3427109-21kworker/u8:1+flush-179:021:54:550
3385359996456,6cyclictest3466105-21latency_hist23:20:010
3385361996353,7cyclictest266-21systemd-journal22:40:281
3385361996352,9cyclictest266-21systemd-journal21:25:001
3385361996252,7cyclictest3445242-21cat22:15:011
3385359996257,4cyclictest3406484-21kworker/u8:3+flush-179:020:45:290
3385359996157,3cyclictest3438308-21kworker/u8:3+events_unbound22:30:220
3385359996156,4cyclictest3438308-21kworker/u8:3+events_unbound23:00:250
3385359996156,4cyclictest3420824-21kworker/u8:2+flush-179:021:09:560
3385361996053,5cyclictest266-21systemd-journal00:33:351
3385359996051,4cyclictest3461054-21kworker/u8:1+events_unbound23:20:260
3385359995950,3cyclictest3424006-21kworker/u8:3+flush-179:021:15:270
3385361995852,4cyclictest3393181-21kworker/u8:0+flush-179:019:35:231
3385361995851,6cyclictest3399814-21kworker/u8:2+flush-179:020:30:231
3385359995853,4cyclictest3399814-21kworker/u8:2+flush-179:020:30:270
3385359995848,3cyclictest3474112-21kworker/u8:1+events_unbound00:25:220
3385361995744,10cyclictest266-21systemd-journal21:05:011
3385359995752,4cyclictest3457865-21kworker/u8:0+flush-179:022:59:550
3385359995651,4cyclictest3399814-21kworker/u8:2+flush-179:020:00:290
3385359995651,4cyclictest3399814-21kworker/u8:2+flush-179:020:00:280
3385361995344,7cyclictest3393181-21kworker/u8:0+flush-179:019:50:001
4577091520,14ptp4l441ktimers/319:10:013
3385361995142,7cyclictest3438308-21kworker/u8:3+flush-179:022:20:231
3385361995142,7cyclictest3413074-21apt-get20:35:141
3385359995147,3cyclictest3382417-21kworker/u8:2+events_unbound19:20:220
3385361995039,9cyclictest3440135-21apt-get22:00:121
3385361995039,9cyclictest3440135-21apt-get22:00:121
3385361995039,8cyclictest266-21systemd-journal20:05:021
3385361994943,4cyclictest266-21systemd-journal00:03:271
3385361994938,9cyclictest3441706-21/usr/sbin/munin22:05:231
338536199491,7cyclictest0-21swapper/121:35:131
3385359994942,5cyclictest3382417-21kworker/u8:2+flush-179:019:30:200
3385361994842,4cyclictest3406484-21kworker/u8:3+flush-179:020:45:011
3385361994742,3cyclictest3391654-21systemd-run19:29:591
3385361994737,8cyclictest510-21rs:main1
3385359994739,5cyclictest3391616-21latency_hist19:30:010
3385361994632,12cyclictest3438308-21kworker/u8:3+flush-179:022:15:231
3385361994536,7cyclictest3399814-21kworker/u8:2+flush-179:019:55:221
3385365994340,2cyclictest0-21swapper/221:58:592
338536199434,16cyclictest3422918-1kworker/1:0H+kblockd22:00:011
338536699420,41cyclictest0-21swapper/300:15:593
3385365994239,2cyclictest0-21swapper/219:42:592
338536599420,40cyclictest0-21swapper/200:15:592
338536699410,40cyclictest0-21swapper/323:26:003
338536699410,39cyclictest3467717-21turbostat23:25:003
3385365994138,1cyclictest0-21swapper/221:44:582
3385361994136,4cyclictest3457865-21kworker/u8:0+flush-179:022:55:201
3385361994132,5cyclictest0-21swapper/121:45:581
338536699400,39cyclictest3477241-21turbostat23:55:013
3385361994035,3cyclictest3474070-21munin-plugin-st23:45:001
338536199401,37cyclictest714-21Xorg20:51:581
338536199401,36cyclictest1-21systemd23:49:271
338536199400,38cyclictest714-21Xorg00:15:591
338536599390,36cyclictest0-21swapper/221:04:582
338536599390,36cyclictest0-21swapper/220:48:582
338536599390,35cyclictest0-21swapper/222:19:562
338536199397,30cyclictest3449938-21sh22:30:001
3385361993931,5cyclictest0-21swapper/119:19:591
3385361993929,8cyclictest3467739-21kworker/u8:0+flush-179:023:35:011
3385366993836,1cyclictest0-21swapper/321:59:003
3385366993836,1cyclictest0-21swapper/319:43:003
3385366993835,2cyclictest0-21swapper/322:05:593
3385366993832,5cyclictest3482098-21turbostat00:10:003
338536699380,3cyclictest3420774-21turbostat20:59:593
338536699380,1cyclictest0-21swapper/320:05:583
3385365993835,2cyclictest0-21swapper/223:54:002
3385365993835,2cyclictest0-21swapper/200:10:002
3385365993834,2cyclictest0-21swapper/220:10:582
338536599380,36cyclictest0-21swapper/223:06:592
338536199387,23cyclictest266-21systemd-journal00:15:011
338536199386,17cyclictest3468377-21tr23:25:161
338536199384,32cyclictest0-21swapper/100:25:141
3385361993835,2cyclictest714-21Xorg23:35:591
3385361993835,2cyclictest714-21Xorg22:54:591
3385361993835,2cyclictest0-21swapper/123:06:591
3385361993835,2cyclictest0-21swapper/119:53:591
3385361993833,3cyclictest3396434-21systemd-run19:45:011
3385361993832,4cyclictest3393202-21latency_hist19:35:011
3385366993735,1cyclictest0-21swapper/321:44:593
3385366993735,1cyclictest0-21swapper/300:32:583
338536699370,29cyclictest0-21swapper/323:03:593
3385365993734,2cyclictest0-21swapper/219:13:592
338536599370,35cyclictest0-21swapper/223:14:562
3385361993725,10cyclictest3388700-21apt-get19:20:131
3385366993633,2cyclictest0-21swapper/321:01:593
3385365993634,1cyclictest0-21swapper/222:49:592
3385365993633,2cyclictest0-21swapper/222:40:592
3385365993632,2cyclictest0-21swapper/223:40:592
338536599360,2cyclictest0-21swapper/220:17:002
338536599360,1cyclictest0-21swapper/223:03:592
3385361993633,2cyclictest0-21swapper/121:55:001
3385361993631,3cyclictest3408076-21perf20:24:561
3385361993630,4cyclictest0-21swapper/120:05:011
3385361993630,4cyclictest0-21swapper/120:05:001
3385361993629,5cyclictest3406484-21kworker/u8:3+flush-179:020:55:171
3385361993626,5cyclictest0-21swapper/123:11:581
338536199362,5cyclictest3422631-21apt-get21:05:131
3385366993533,1cyclictest0-21swapper/321:33:583
3385366993533,1cyclictest0-21swapper/321:10:593
3385366993532,2cyclictest0-21swapper/321:27:593
3385366993529,4cyclictest3419197-21turbostat20:55:003
338536699350,1cyclictest0-21swapper/319:52:583
338536699350,1cyclictest0-21swapper/300:24:003
3385365993533,1cyclictest0-21swapper/222:29:592
3385365993531,2cyclictest0-21swapper/220:21:592
3385361993532,2cyclictest0-21swapper/123:21:591
3385361993528,5cyclictest3491947-21latency_hist00:40:011
3385366993433,1cyclictest0-21swapper/320:35:583
3385366993432,1cyclictest0-21swapper/319:13:593
3385366993431,2cyclictest0-21swapper/323:17:593
338536199347,12cyclictest714-21Xorg21:27:591
3385366993331,1cyclictest0-21swapper/322:50:003
3385366993331,1cyclictest0-21swapper/320:10:593
3385366993330,2cyclictest0-21swapper/322:29:593
338536599330,31cyclictest0-21swapper/222:32:592
338536199339,9cyclictest3455246-21df22:45:171
338536199338,8cyclictest714-21Xorg22:32:591
3385361993330,2cyclictest0-21swapper/123:18:591
3385361993328,4cyclictest484-21dbus-daemon21:15:001
3385361993326,5cyclictest3385222-21latency_hist19:10:021
3385361993325,7cyclictest3405122-21apt-get20:10:121
3385361993317,10cyclictest908065-21snmpd21:15:141
3385366993230,1cyclictest0-21swapper/322:40:593
3385365993228,2cyclictest0-21swapper/220:03:592
3385365993228,2cyclictest0-21swapper/220:03:592
338536199328,9cyclictest714-21Xorg00:09:591
338536199328,7cyclictest3414962-21df_inode20:40:131
3385366993129,1cyclictest0-21swapper/323:40:593
338536699310,30cyclictest0-21swapper/319:48:003
3385365993127,2cyclictest0-21swapper/223:16:592
338536599310,2cyclictest0-21swapper/219:48:002
338536599310,29cyclictest0-21swapper/220:25:132
338536199317,8cyclictest0-21swapper/122:35:241
3385366993028,1cyclictest0-21swapper/323:06:593
3385366993028,1cyclictest0-21swapper/320:21:583
338536699300,23cyclictest0-21swapper/320:00:003
3385365993027,2cyclictest0-21swapper/223:55:132
3385365993026,2cyclictest0-21swapper/219:37:592
338536599300,2cyclictest0-21swapper/200:25:152
338536599300,2cyclictest0-21swapper/200:10:152
338536599300,1cyclictest0-21swapper/220:05:582
4577091290,7ptp4l441ktimers/322:35:003
4577091290,6ptp4l441ktimers/322:40:003
4577091290,5ptp4l441ktimers/300:25:013
3385366992926,2cyclictest0-21swapper/320:45:153
338536699290,28cyclictest0-21swapper/321:50:133
338536699290,27cyclictest0-21swapper/319:25:133
3385365992926,2cyclictest0-21swapper/222:00:142
3385365992926,2cyclictest0-21swapper/222:00:132
3385365992925,2cyclictest0-21swapper/220:43:592
338536599290,28cyclictest0-21swapper/220:35:152
338536599290,27cyclictest0-21swapper/222:10:022
338536599290,27cyclictest0-21swapper/221:50:122
338536599290,27cyclictest0-21swapper/220:50:152
338536599290,27cyclictest0-21swapper/200:30:022
338536599290,21cyclictest0-21swapper/219:25:132
4577091280,6ptp4l441ktimers/323:50:013
4577091280,6ptp4l441ktimers/321:10:013
4577091280,5ptp4l61490irq/134-eno1-TxRx-022:25:013
4577091280,5ptp4l441ktimers/319:20:003
4577091280,5ptp4l441ktimers/300:40:013
3385366992826,1cyclictest0-21swapper/323:55:133
3385366992826,1cyclictest0-21swapper/322:50:133
3385366992825,2cyclictest0-21swapper/321:46:583
3385366992825,2cyclictest0-21swapper/320:03:593
3385366992825,2cyclictest0-21swapper/320:03:583
338536699280,2cyclictest0-21swapper/322:00:133
338536699280,2cyclictest0-21swapper/322:00:133
338536699280,27cyclictest0-21swapper/320:25:143
338536699280,26cyclictest0-21swapper/322:10:033
338536699280,21cyclictest0-21swapper/322:15:033
3385365992826,1cyclictest0-21swapper/221:24:592
3385365992824,2cyclictest0-21swapper/223:20:592
338536599280,2cyclictest0-21swapper/222:38:592
338536599280,2cyclictest0-21swapper/200:00:122
338536599280,26cyclictest0-21swapper/222:50:132
338536599280,26cyclictest0-21swapper/221:30:002
338536599280,25cyclictest0-21swapper/221:49:552
4577091270,6ptp4l61490irq/134-eno1-TxRx-023:15:013
4577091270,6ptp4l441ktimers/323:39:563
4577091270,6ptp4l441ktimers/321:20:003
4577091270,5ptp4l441ktimers/320:19:553
3385366992723,2cyclictest0-21swapper/321:25:003
338536699270,1cyclictest0-21swapper/300:10:153
338536699270,1cyclictest0-21swapper/300:00:123
3385365992724,2cyclictest0-21swapper/223:33:592
3385365992724,2cyclictest0-21swapper/223:27:592
3385365992724,2cyclictest0-21swapper/219:21:582
3385365992723,2cyclictest0-21swapper/220:32:592
338536599270,25cyclictest0-21swapper/223:38:592
338536599270,24cyclictest0-21swapper/222:08:592
338536599270,24cyclictest0-21swapper/221:14:002
4577091260,5ptp4l61490irq/134-eno1-TxRx-022:59:553
4577091260,5ptp4l61490irq/134-eno1-TxRx-019:24:563
4577091260,4ptp4l61490irq/134-eno1-TxRx-020:35:003
3385366992624,1cyclictest0-21swapper/319:35:593
3385365992623,2cyclictest0-21swapper/221:31:592
3385365992623,2cyclictest0-21swapper/200:39:562
3385365992622,2cyclictest0-21swapper/221:17:582
3385365992622,2cyclictest0-21swapper/219:16:002
338536599260,2cyclictest0-21swapper/220:55:142
4577091250,4ptp4l61490irq/134-eno1-TxRx-021:39:553
4577091250,4ptp4l441ktimers/319:34:543
3385366992523,1cyclictest0-21swapper/323:31:593
3385366992523,1cyclictest0-21swapper/320:43:593
3385365992522,2cyclictest0-21swapper/221:05:582
3385365992421,2cyclictest0-21swapper/219:50:122
3385365992320,2cyclictest0-21swapper/222:23:592
3385365992319,2cyclictest0-21swapper/222:56:592
3385365992319,2cyclictest0-21swapper/221:36:592
3385365992219,2cyclictest0-21swapper/200:20:122
3385365992117,2cyclictest0-21swapper/219:34:552
3385365992017,2cyclictest0-21swapper/223:46:582
3385359991810,2cyclictest171rcu_preempt19:10:020
3385365991612,2cyclictest0-21swapper/219:55:582
33853659930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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