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2026-09-24 - 08:22
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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 Thu Sep 24, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
269141099147133,11cyclictest2708836-21apt-get20:01:480
269141399144131,9cyclictest2707251-21latency_hist20:00:001
269141399141120,18cyclictest2771722-21apt-get23:20:001
269141399137115,19cyclictest2725038-21kworker/u8:1+flush-179:021:40:151
269141099135123,9cyclictest2754226-21latency_hist22:25:010
269141099133121,9cyclictest2699275-21latency_hist19:35:000
269141099132121,8cyclictest2704052-21latency_hist19:50:000
269141099132119,10cyclictest2725038-21kworker/u8:1+events_unbound21:35:220
269141099129121,5cyclictest2780984-21kworker/u8:2+flush-179:000:00:010
269141099129121,5cyclictest2780984-21kworker/u8:2+flush-179:000:00:010
269141399126114,8cyclictest2691352-21kworker/u8:0+flush-179:019:25:201
269141399123109,11cyclictest1213033-21systemd-journal00:15:001
269141099120109,8cyclictest2725038-21kworker/u8:1+flush-179:021:10:240
269141099114102,8cyclictest2784773-21kworker/u8:1+flush-179:000:30:220
269141399113104,6cyclictest2745704-21kworker/u8:0+flush-179:022:10:211
269141399113103,7cyclictest2728503-21latency_hist21:05:001
269141399112103,6cyclictest2710505-21kworker/u8:3+flush-179:020:20:211
26914139911198,9cyclictest66105-21cups-browsed00:00:011
26914139911198,9cyclictest66105-21cups-browsed00:00:011
26914109911199,8cyclictest2759041-21kworker/u8:3+flush-179:022:45:210
269141099110104,4cyclictest2731909-21kworker/u8:2+flush-179:022:30:230
26914109910699,4cyclictest2745704-21kworker/u8:0+flush-179:023:10:260
269141099106101,4cyclictest2780984-21kworker/u8:2+flush-179:023:50:260
26914109910597,5cyclictest2678923-21kworker/u8:2+flush-179:019:15:230
26914109910596,6cyclictest2723445-21kworker/u8:0+flush-179:021:00:150
26914139910494,7cyclictest2721631-21apt-get20:45:001
26914139910397,4cyclictest2725038-21kworker/u8:1+flush-179:021:45:171
26914139910394,6cyclictest2769580-21kworker/u8:3+flush-179:023:15:001
26914139910394,6cyclictest2696103-21latency_hist19:25:011
26914139910364,24cyclictest2791408-21apt-get00:20:121
26914139910291,8cyclictest2791106-21kworker/u8:2+flush-179:000:30:151
26914139910291,7cyclictest2699258-21kworker/u8:3+flush-179:019:50:171
26914139910090,7cyclictest2731909-21kworker/u8:2+flush-179:021:25:231
26914109910088,9cyclictest2726659-21apt-get21:00:000
2691410991000,97cyclictest2751089-21latency_hist22:15:000
2691410999990,7cyclictest2780984-21kworker/u8:2+flush-179:000:05:270
2691410999990,7cyclictest2780984-21kworker/u8:2+flush-179:000:05:270
2691410999889,6cyclictest2784773-21kworker/u8:1+flush-179:000:35:230
2691410999889,6cyclictest2784773-21kworker/u8:1+flush-179:000:10:190
2691413999791,4cyclictest2725038-21kworker/u8:1+flush-179:021:10:281
2691413999789,5cyclictest2745704-21kworker/u8:0+flush-179:022:50:261
2691410999690,3cyclictest2745704-21kworker/u8:0+flush-179:022:40:270
2691410999688,6cyclictest2725038-21kworker/u8:1+flush-179:021:40:210
2691413999487,5cyclictest2721600-21kworker/u8:2+flush-179:020:50:241
2691410999482,9cyclictest1213033-21systemd-journal20:15:000
2691410999388,3cyclictest2691352-21kworker/u8:0+flush-179:019:10:210
2691413999282,7cyclictest2678923-21kworker/u8:2+flush-179:019:15:211
2691413999281,8cyclictest2722132-21apt-get20:45:101
2691413999186,3cyclictest2745704-21kworker/u8:0+flush-179:023:30:151
2691413999181,7cyclictest2776736-21kworker/u8:1+flush-179:023:35:231
2691410999186,4cyclictest2731909-21kworker/u8:2+flush-179:022:10:020
2691410999184,5cyclictest2776736-21kworker/u8:1+flush-179:023:35:180
2691410999083,5cyclictest2745704-21kworker/u8:0+flush-179:022:25:160
2691410999083,5cyclictest2710505-21kworker/u8:3+flush-179:020:25:220
2691410998983,4cyclictest2776736-21kworker/u8:1+flush-179:023:40:260
2691410998983,4cyclictest2763801-21kworker/u8:2+flush-179:023:00:230
2691410998981,5cyclictest2745704-21kworker/u8:0+flush-179:023:20:200
2691413998879,6cyclictest2731909-21kworker/u8:2+flush-179:022:15:231
2691410998881,4cyclictest2745704-21kworker/u8:0+events_unbound23:10:000
2691413998780,5cyclictest2731909-21kworker/u8:2+flush-179:021:50:201
2691413998678,6cyclictest2763801-21kworker/u8:2+flush-179:023:00:171
2691410998663,20cyclictest2710471-21latency_hist20:10:010
2691413998573,9cyclictest2717093-21apt-get20:30:131
2691413998478,5cyclictest2745704-21kworker/u8:0+flush-179:022:40:241
2691413998477,6cyclictest2710505-21kworker/u8:3+flush-179:020:30:011
2691410998478,4cyclictest2731909-21kworker/u8:2+flush-179:021:45:210
2691410998475,6cyclictest2710505-21kworker/u8:3+flush-179:020:30:190
2691413998377,4cyclictest2731909-21kworker/u8:2+flush-179:022:05:191
2691413998377,4cyclictest2710449-21kworker/u8:0+flush-179:020:10:251
2691413998371,11cyclictest2791106-21kworker/u8:2+flush-179:000:19:551
2691410998377,4cyclictest2702450-21kworker/u8:1+flush-179:020:35:140
2691410998376,5cyclictest2773008-21kworker/u8:2+flush-179:023:32:510
2691410998375,6cyclictest1213033-21systemd-journal00:04:000
2691410998375,5cyclictest2715252-21latency_hist20:25:000
2691410998373,7cyclictest2721745-21gpgv20:45:010
2691413998174,5cyclictest2725038-21kworker/u8:1+events_unbound21:15:131
2691413997975,2cyclictest2745704-21kworker/u8:0+flush-179:022:25:151
2691410997972,5cyclictest2725038-21kworker/u8:1+flush-179:021:05:250
2691410997971,5cyclictest2731909-21kworker/u8:2+flush-179:021:25:210
2691413997872,5cyclictest2789520-21kworker/u8:0+events_unbound00:25:241
2691413997871,5cyclictest2784773-21kworker/u8:1+flush-179:000:35:231
2691413997770,5cyclictest2745704-21kworker/u8:0+flush-179:022:55:141
2691413997768,7cyclictest1213033-21systemd-journal00:05:011
2691410997770,5cyclictest2691352-21kworker/u8:0+flush-179:019:40:180
2691413997668,6cyclictest2780996-21kworker/u8:3+flush-179:023:50:171
2691410997670,4cyclictest2702450-21kworker/u8:1+flush-179:020:15:190
2691410997668,6cyclictest2731909-21kworker/u8:2+flush-179:021:50:260
2691413997569,4cyclictest2702512-21kworker/u8:2+events_unbound19:45:271
2691410997568,5cyclictest2678923-21kworker/u8:2+flush-179:019:35:230
2691410997567,6cyclictest2678923-21kworker/u8:2+flush-179:019:25:180
2691410997566,6cyclictest2733520-21/usr/sbin/munin21:20:190
2691410997566,6cyclictest2731909-21kworker/u8:2+flush-179:022:00:180
2691410997467,5cyclictest2725038-21kworker/u8:1+flush-179:021:15:220
2691413997369,3cyclictest2723445-21kworker/u8:0+flush-179:021:05:171
2691410997368,4cyclictest2699258-21kworker/u8:3+flush-179:019:50:250
2691413997262,7cyclictest1213033-21systemd-journal23:46:091
2691410997263,7cyclictest2791106-21kworker/u8:2+flush-179:000:30:000
2691410997165,5cyclictest2721600-21kworker/u8:2+flush-179:020:45:210
2691413997059,8cyclictest2691561-21/usr/sbin/munin19:10:241
2691413996964,4cyclictest2725038-21kworker/u8:1+flush-179:020:55:271
2691413996961,6cyclictest2713650-21latency_hist20:20:001
2691413996960,6cyclictest2780984-21kworker/u8:2+flush-179:000:05:161
2691413996960,6cyclictest2780984-21kworker/u8:2+flush-179:000:05:161
2691413996862,4cyclictest2773008-21kworker/u8:2+flush-179:023:25:201
2691413996862,4cyclictest2773008-21kworker/u8:2+flush-179:023:25:201
2691413996761,4cyclictest2765776-21kworker/u8:1+flush-179:023:05:211
2691413996759,6cyclictest2734876-21apt-get21:25:001
2691413996759,6cyclictest2731909-21kworker/u8:2+events_unbound22:20:211
2691410996759,5cyclictest2773008-21kworker/u8:2+events_unbound23:25:180
2691410996759,5cyclictest2773008-21kworker/u8:2+events_unbound23:25:180
2691410996660,4cyclictest2702450-21kworker/u8:1+flush-179:019:55:180
2691410996659,5cyclictest2784773-21kworker/u8:1+flush-179:000:15:210
2691410996659,5cyclictest2778601-21kworker/u8:0+flush-179:023:45:200
2691413996558,5cyclictest2731909-21kworker/u8:2+flush-179:022:35:221
2691413996556,6cyclictest2773582-21latency_hist23:25:011
2691413996454,8cyclictest2700883-21latency_hist19:40:011
2691410996454,8cyclictest1213033-21systemd-journal00:25:000
2691413996352,9cyclictest2744921-21apt-get21:55:101
2691410996357,4cyclictest2721600-21kworker/u8:2+flush-179:020:50:200
2691413996256,4cyclictest2702450-21kworker/u8:1+flush-179:020:05:251
2691413996255,5cyclictest2725038-21kworker/u8:1+events_unbound21:30:261
2691410996257,4cyclictest2745704-21kworker/u8:0+flush-179:022:50:260
2691413996054,4cyclictest2759041-21kworker/u8:3+flush-179:022:45:141
2691410996051,7cyclictest2725038-21kworker/u8:1+flush-179:021:30:250
2691410996051,6cyclictest2746274-21latency_hist22:00:010
269141899590,57cyclictest0-21swapper/321:45:583
2691413995954,4cyclictest2702450-21kworker/u8:1+events_unbound20:00:171
2691413995953,5cyclictest2678923-21kworker/u8:2+flush-179:019:30:271
2691410995954,3cyclictest1-21systemd22:20:000
269141799580,56cyclictest0-21swapper/221:45:582
2691410995749,7cyclictest2745704-21kworker/u8:0+flush-179:022:55:320
2691413995545,9cyclictest2691352-21kworker/u8:0+events_unbound19:40:221
2691413995347,5cyclictest2725038-21kworker/u8:1+flush-179:021:35:161
2691413995342,8cyclictest2691295-21latency_hist19:10:021
2691413995342,8cyclictest2691295-21latency_hist19:10:021
2691410995348,4cyclictest2745704-21kworker/u8:0+flush-179:023:15:210
4577091490,13ptp4l441ktimers/319:09:563
4577091490,13ptp4l441ktimers/319:09:563
2691413994842,5cyclictest2731909-21kworker/u8:2+events_unbound22:30:251
2691413994840,5cyclictest2776736-21kworker/u8:1+flush-179:023:40:191
2691410994540,4cyclictest2731909-21kworker/u8:2+events_unbound22:35:140
2691413994439,4cyclictest2702450-21kworker/u8:1+flush-179:020:35:181
2691410994438,5cyclictest2678923-21kworker/u8:2+events_unbound19:20:230
2691417994237,2cyclictest0-21swapper/200:18:592
269141399420,4cyclictest2747881-21awk22:05:011
2691418994137,2cyclictest0-21swapper/320:44:553
2691417994137,2cyclictest0-21swapper/220:44:542
2691418994037,2cyclictest0-21swapper/300:18:593
269141899400,5cyclictest2725063-21turbostat20:55:003
269141899400,38cyclictest0-21swapper/300:07:593
269141899400,38cyclictest0-21swapper/300:07:593
269141799400,35cyclictest0-21swapper/220:46:592
2691417993935,2cyclictest0-21swapper/219:26:592
269141799390,36cyclictest0-21swapper/221:52:592
269141799390,30cyclictest0-21swapper/200:07:592
269141799390,30cyclictest0-21swapper/200:07:592
2691418993835,2cyclictest0-21swapper/319:26:593
2691418993833,4cyclictest2766972-21turbostat23:05:003
269141899380,37cyclictest0-21swapper/320:46:593
269141899380,37cyclictest0-21swapper/319:46:583
269141899380,36cyclictest0-21swapper/321:37:003
269141799380,2cyclictest0-21swapper/220:09:002
269141899370,2cyclictest0-21swapper/320:08:593
2691417993734,2cyclictest0-21swapper/223:27:592
2691417993734,2cyclictest0-21swapper/223:27:592
2691417993734,2cyclictest0-21swapper/222:42:592
2691417993733,3cyclictest0-21swapper/223:45:592
2691417993733,2cyclictest0-21swapper/221:09:552
269141799370,35cyclictest0-21swapper/221:36:592
269141799370,35cyclictest0-21swapper/219:46:592
269141799370,2cyclictest0-21swapper/222:21:592
2691418993634,1cyclictest0-21swapper/322:43:003
269141899360,35cyclictest0-21swapper/321:53:003
2691417993634,1cyclictest0-21swapper/223:05:002
2691417993632,2cyclictest0-21swapper/220:21:002
2691418993533,1cyclictest0-21swapper/323:45:593
2691418993533,1cyclictest0-21swapper/323:27:593
2691418993533,1cyclictest0-21swapper/323:27:593
2691418993533,1cyclictest0-21swapper/321:09:543
2691417993532,2cyclictest0-21swapper/222:57:592
2691417993531,2cyclictest0-21swapper/223:41:592
2691417993530,2cyclictest0-21swapper/223:57:592
2691417993530,2cyclictest0-21swapper/223:57:592
2691418993432,1cyclictest0-21swapper/321:29:583
2691418993431,2cyclictest0-21swapper/320:20:593
2691418993431,2cyclictest0-21swapper/300:34:593
2691417993432,1cyclictest0-21swapper/200:34:592
2691417993431,2cyclictest0-21swapper/220:19:592
2691417993431,2cyclictest0-21swapper/219:42:592
2691417993430,2cyclictest0-21swapper/221:21:002
2691417993429,2cyclictest0-21swapper/220:56:592
2691418993331,1cyclictest0-21swapper/323:41:593
2691418993331,1cyclictest0-21swapper/322:57:593
2691418993331,1cyclictest0-21swapper/319:42:593
2691418993330,2cyclictest0-21swapper/321:20:593
2691417993331,1cyclictest0-21swapper/221:29:582
2691417993330,2cyclictest0-21swapper/221:58:002
2691417993329,2cyclictest0-21swapper/221:10:592
2691418993230,1cyclictest0-21swapper/320:19:593
2691418993229,2cyclictest0-21swapper/321:57:593
2691418993229,2cyclictest0-21swapper/321:10:593
2691418993229,2cyclictest0-21swapper/320:56:593
2691417993229,2cyclictest0-21swapper/223:31:592
2691418993129,1cyclictest0-21swapper/323:57:593
2691418993129,1cyclictest0-21swapper/323:57:593
2691418993129,1cyclictest0-21swapper/323:31:593
2691418993128,2cyclictest0-21swapper/320:38:593
2691417993027,2cyclictest0-21swapper/223:54:592
2691417993027,2cyclictest0-21swapper/220:39:002
2691417993027,2cyclictest0-21swapper/219:19:592
269141799300,28cyclictest0-21swapper/220:10:122
269141799300,28cyclictest0-21swapper/219:55:132
4577091290,6ptp4l441ktimers/322:55:003
2691418992927,1cyclictest0-21swapper/323:54:593
2691418992927,1cyclictest0-21swapper/322:32:593
2691418992927,1cyclictest0-21swapper/319:55:133
2691418992926,2cyclictest0-21swapper/323:08:593
2691418992926,2cyclictest0-21swapper/319:30:143
2691418992926,2cyclictest0-21swapper/300:02:593
2691418992923,5cyclictest2797515-21turbostat00:39:593
269141899290,2cyclictest0-21swapper/323:20:013
269141899290,27cyclictest0-21swapper/320:10:133
269141899290,27cyclictest0-21swapper/300:25:143
2691417992926,2cyclictest0-21swapper/223:08:592
2691417992926,2cyclictest0-21swapper/222:32:592
2691417992926,2cyclictest0-21swapper/221:40:132
2691417992925,2cyclictest0-21swapper/223:10:172
2691417992925,2cyclictest0-21swapper/200:02:592
269141799290,2cyclictest0-21swapper/223:20:012
269141799290,28cyclictest0-21swapper/200:25:132
269141799290,27cyclictest0-21swapper/220:52:002
269141799290,27cyclictest0-21swapper/219:30:152
4577091280,6ptp4l441ktimers/322:20:003
4577091280,6ptp4l441ktimers/300:25:003
4577091280,5ptp4l441ktimers/321:05:003
2691418992826,1cyclictest0-21swapper/319:19:583
2691418992825,2cyclictest0-21swapper/323:10:173
269141899280,27cyclictest0-21swapper/323:20:013
269141899280,26cyclictest0-21swapper/322:20:123
269141899280,26cyclictest0-21swapper/320:31:593
2691417992824,2cyclictest0-21swapper/222:28:592
269141799280,27cyclictest0-21swapper/223:20:012
4577091270,7ptp4l441ktimers/319:25:003
2691418992725,1cyclictest0-21swapper/323:35:143
2691418992725,1cyclictest0-21swapper/321:40:123
2691417992724,2cyclictest0-21swapper/223:35:142
269141799270,25cyclictest0-21swapper/220:31:592
269141799270,24cyclictest0-21swapper/222:49:562
4577091260,6ptp4l441ktimers/320:30:013
4577091260,5ptp4l441ktimers/321:35:013
4577091260,5ptp4l441ktimers/319:15:013
2691418992624,1cyclictest0-21swapper/322:28:593
2691418992623,2cyclictest0-21swapper/322:01:583
2691417992623,2cyclictest0-21swapper/222:01:582
2691417992623,2cyclictest0-21swapper/221:01:582
2691417992623,2cyclictest0-21swapper/200:40:002
2691417992622,2cyclictest0-21swapper/221:16:582
269141799260,2cyclictest0-21swapper/219:20:582
269141799260,24cyclictest0-21swapper/220:26:582
4577091250,6ptp4l61490irq/134-eno1-TxRx-019:40:013
4577091250,5ptp4l61490irq/134-eno1-TxRx-020:05:013
4577091250,5ptp4l441ktimers/321:19:573
4577091250,5ptp4l441ktimers/300:14:563
4577091250,4ptp4l61490irq/134-eno1-TxRx-022:15:003
4577091250,4ptp4l441ktimers/322:10:023
2691417992521,2cyclictest0-21swapper/200:21:592
4577091240,5ptp4l61490irq/134-eno1-TxRx-019:55:003
4577091240,4ptp4l441ktimers/322:49:553
2691417992421,2cyclictest0-21swapper/200:10:102
2691417992420,2cyclictest0-21swapper/222:18:592
2691417992420,2cyclictest0-21swapper/222:06:592
2691417992320,2cyclictest0-21swapper/220:00:592
2691417992320,2cyclictest0-21swapper/219:51:592
2691417992017,2cyclictest0-21swapper/222:53:592
2691417992017,2cyclictest0-21swapper/221:33:592
2691417991915,2cyclictest0-21swapper/219:11:592
269141899180,17cyclictest2758999-21turbostat22:39:593
231999180,7rtkit-daemon2685261-21kworker/0:0+pm19:06:390
231999180,7rtkit-daemon2685261-21kworker/0:0+pm19:06:390
2691417991411,2cyclictest0-21swapper/222:14:002
2691417991411,2cyclictest0-21swapper/219:35:132
2691417991410,2cyclictest0-21swapper/222:39:552
26914179930,2cyclictest0-21swapper/219:10:012
26914179930,2cyclictest0-21swapper/219:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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