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2026-07-15 - 06:58
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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 376 highest latencies:
System rackeslot6.osadl.org (updated Wed Jul 15, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
284233999154146,6cyclictest2916890-21kworker/u8:0+events_unbound23:35:000
284233999154133,18cyclictest2872734-21latency_hist20:45:000
284233999135128,4cyclictest2929524-21kworker/u8:3+events_unbound00:00:000
284233999134128,4cyclictest2864746-21kworker/u8:2+flush-179:021:10:000
284233999134123,8cyclictest2877549-21kworker/u8:0+events_unbound21:30:010
284234199132117,13cyclictest2935891-21kworker/u8:1+flush-179:000:30:011
284234199126114,8cyclictest2913035-21latency_hist22:50:011
284233999125117,6cyclictest2890539-21kworker/u8:0+flush-179:022:00:010
284233999123117,4cyclictest2908247-21kworker/u8:3+events_unbound23:05:000
284233999121113,6cyclictest2911426-21kworker/u8:0+flush-179:022:45:230
284233999121110,8cyclictest2931066-21latency_hist23:45:020
284234199120111,7cyclictest2906666-21latency_hist22:30:011
284233999117111,5cyclictest2908247-21kworker/u8:3+events_unbound22:40:000
284233999116108,6cyclictest2848840-21kworker/u8:1+events_unbound19:35:010
284234199115104,9cyclictest2922833-21/usr/sbin/munin23:20:251
284233999115103,10cyclictest2847013-21latency_hist19:25:010
284233999113105,5cyclictest2893710-21kworker/u8:3+flush-179:022:15:000
284233999113104,6cyclictest2853639-21latency_hist19:45:000
284233999113103,7cyclictest2840426-21kworker/u8:3+flush-179:019:15:170
284234199111100,9cyclictest2880940-21apt-get21:10:111
284233999110102,6cyclictest2885509-21kworker/u8:3+events_unbound21:30:030
284234199109101,6cyclictest2916890-21kworker/u8:0+flush-179:023:10:271
284233999109100,7cyclictest2890486-21latency_hist21:40:010
28423399910889,14cyclictest2926038-21apt-get23:30:000
28423399910799,5cyclictest2893710-21kworker/u8:3+flush-179:022:15:260
28423419910699,5cyclictest2890539-21kworker/u8:0+flush-179:022:25:011
28423419910696,8cyclictest2935824-40logrotate00:00:011
28423399910699,5cyclictest2943320-21kworker/u8:2+events_unbound00:25:010
28423399910492,9cyclictest2934472-21kworker/u8:0+events_unbound00:05:010
28423399910394,5cyclictest2856844-21kworker/u8:0+flush-179:020:05:240
28423399910389,9cyclictest2898457-21latency_hist22:05:010
28423399910291,8cyclictest2914619-21latency_hist22:55:010
28423399910093,5cyclictest2925991-21kworker/u8:1+flush-179:023:40:010
2842341999991,6cyclictest2877549-21kworker/u8:0+flush-179:021:15:261
2842339999988,8cyclictest2849034-21cat19:30:020
2842341999783,10cyclictest1213033-21systemd-journal19:25:011
2842341999687,7cyclictest2947291-21apt-get00:35:131
2842341999681,8cyclictest2925991-21kworker/u8:1+flush-179:023:45:161
2842341999681,8cyclictest2925991-21kworker/u8:1+flush-179:023:45:161
2842339999689,5cyclictest2934472-21kworker/u8:0+flush-179:000:20:010
2842339999588,5cyclictest2875493-21kworker/u8:1+flush-179:020:55:170
2842339999587,6cyclictest2916890-21kworker/u8:0+flush-179:023:10:000
2842341999485,7cyclictest2889153-21apt-get21:35:131
2842341999482,9cyclictest2843820-21latency_hist19:15:011
2842339999487,4cyclictest2929524-21kworker/u8:3+events_unbound23:50:140
2842339999487,4cyclictest2863175-21latency_hist20:15:010
2842339999085,4cyclictest2935891-21kworker/u8:1+flush-179:000:10:000
2842339999085,4cyclictest2935891-21kworker/u8:1+flush-179:000:09:590
2842341998979,8cyclictest2908491-21/usr/sbin/munin22:35:161
2842341998979,7cyclictest2890542-21kworker/u8:2+flush-179:021:50:241
2842339998983,4cyclictest2864746-21kworker/u8:2+flush-179:021:00:170
2842339998980,6cyclictest2883876-21latency_hist21:20:010
2842341998875,10cyclictest2861825-21kworker/u8:1+events_unbound20:30:001
2842341998779,6cyclictest2898952-21/usr/sbin/munin22:05:191
2842341998776,7cyclictest2916890-21kworker/u8:0+flush-179:023:30:271
2842339998680,5cyclictest2885339-21kworker/u8:1+events_unbound21:25:010
2842341998571,10cyclictest1213033-21systemd-journal20:35:011
2842339998576,6cyclictest1213033-21systemd-journal00:14:590
2842341998470,10cyclictest1213033-21systemd-journal19:50:001
2842341998468,12cyclictest2887052-21latency_hist21:30:011
2842339998476,4cyclictest2908247-21kworker/u8:3+flush-179:022:40:280
2842339998376,5cyclictest2925991-21kworker/u8:1+flush-179:023:45:230
2842339998376,5cyclictest2925991-21kworker/u8:1+flush-179:023:45:220
2842341998275,5cyclictest2892328-21/usr/sbin/munin21:45:171
2842341998273,7cyclictest2887568-21apt-get21:30:121
2842339998275,4cyclictest2853621-21kworker/u8:2+flush-179:020:00:160
2842339998267,8cyclictest2890539-21kworker/u8:0+events_unbound22:05:020
2842341998071,6cyclictest2867990-21kworker/u8:0+flush-179:020:40:261
2842341998070,6cyclictest2885339-21kworker/u8:1+flush-179:021:40:261
2842341997970,5cyclictest2840750-21kworker/u8:4+flush-179:019:25:251
2842341997969,8cyclictest1213033-21systemd-journal00:04:001
2842339997972,5cyclictest2856844-21kworker/u8:0+flush-179:020:15:220
2842339997971,6cyclictest2874320-21latency_hist20:50:000
2842339997967,9cyclictest2856844-21kworker/u8:0+flush-179:019:55:270
2842341997867,8cyclictest2908247-21kworker/u8:3+events_unbound22:40:261
2842341997865,9cyclictest2893710-21kworker/u8:3+flush-179:021:55:241
2842339997869,6cyclictest2861825-21kworker/u8:1+flush-179:020:20:160
2842339997865,10cyclictest1213033-21systemd-journal22:35:000
2842341997767,7cyclictest2844074-21apt-get19:15:111
2842339997559,13cyclictest1213033-21systemd-journal19:40:000
2842339997466,7cyclictest2853894-21apt-get19:45:130
284233999741,71cyclictest1-21systemd00:40:010
2842341997365,6cyclictest2925991-21kworker/u8:1+events_unbound23:29:591
2842341997359,10cyclictest1213033-21systemd-journal20:50:011
2842339997366,5cyclictest2867990-21kworker/u8:0+flush-179:020:50:230
2842339997163,6cyclictest2935891-21kworker/u8:1+flush-179:000:25:260
2842341997061,6cyclictest2945478-21kworker/u8:3+events_unbound00:35:021
2842339997065,4cyclictest2825840-21kworker/u8:2+flush-179:019:10:260
2842341996957,9cyclictest2908247-21kworker/u8:3+flush-179:022:50:231
2842339996963,4cyclictest2853621-21kworker/u8:2+flush-179:019:50:210
2842341996856,8cyclictest2913016-21kworker/u8:1+flush-179:022:55:231
2842341996856,8cyclictest2913016-21kworker/u8:1+flush-179:022:55:221
2842341996760,5cyclictest2906903-21/usr/sbin/munin22:30:231
2842339996759,6cyclictest2885339-21kworker/u8:1+flush-179:021:40:220
284234699660,63cyclictest0-21swapper/321:03:593
2842339996654,9cyclictest2945988-21diskstats00:30:150
2842339996560,4cyclictest2916890-21kworker/u8:0+events_unbound23:15:250
2842339996556,6cyclictest2903449-21kworker/u8:1+events_unbound22:20:150
2842339996555,6cyclictest2864829-21kworker/u8:3+flush-179:020:25:200
2842341996454,8cyclictest2916890-21kworker/u8:0+events_unbound23:10:011
2842339996457,4cyclictest2861825-21kworker/u8:1+events_unbound20:30:160
2842341996358,3cyclictest2893710-21kworker/u8:3+flush-179:022:15:161
2842341996353,8cyclictest2940916-21apt-get00:15:141
2842341996348,10cyclictest2853621-21kworker/u8:2+flush-179:019:50:221
2842341996053,5cyclictest2916890-21kworker/u8:0+flush-179:023:00:231
2842341996053,5cyclictest2864746-21kworker/u8:2+flush-179:021:00:271
2842341995949,7cyclictest2853621-21kworker/u8:2+flush-179:019:55:181
2842346995851,5cyclictest2903488-21turbostat22:20:003
2842339995852,4cyclictest2890539-21kworker/u8:0+events_unbound21:50:150
2842339995850,5cyclictest2916228-21latency_hist23:00:020
2842339995850,5cyclictest2916228-21latency_hist23:00:010
2842339995847,9cyclictest1213033-21systemd-journal23:25:010
2842346995755,1cyclictest0-21swapper/319:58:593
2842341995751,4cyclictest2842206-21latency_hist19:10:031
2842339995650,4cyclictest2890539-21kworker/u8:0+flush-179:022:25:140
2842341995548,5cyclictest2875493-21kworker/u8:1+flush-179:020:55:231
2842341995444,8cyclictest2922580-21latency_hist23:20:011
2842341995342,8cyclictest2864746-21kworker/u8:2+flush-179:020:55:001
2842339995349,3cyclictest2867990-21kworker/u8:0+flush-179:020:35:180
2842346995250,1cyclictest0-21swapper/320:04:593
2842339995247,4cyclictest2880677-21kworker/u8:1+flush-179:021:10:290
2842339995244,6cyclictest2919636-21kworker/u8:2+flush-179:023:10:320
2842341995144,5cyclictest2867990-21kworker/u8:0+events_unbound20:40:011
4577091490,13ptp4l441ktimers/319:10:003
2842341994839,5cyclictest321-21hwrng20:05:581
2842341994835,12cyclictest2856844-21kworker/u8:0+flush-179:020:15:171
2842341994640,4cyclictest1-21systemd00:15:011
2842341994637,7cyclictest2861825-21kworker/u8:1+flush-179:020:20:211
2842341994338,3cyclictest1-21systemd23:35:321
2842341994337,4cyclictest2864746-21kworker/u8:2+flush-179:021:05:161
2842341994333,8cyclictest2856844-21kworker/u8:0+flush-179:020:05:001
2842341994332,8cyclictest2847508-21kworker/u8:0+flush-179:019:35:221
2842344994138,2cyclictest0-21swapper/222:07:002
284234699400,39cyclictest2905087-21turbostat22:25:003
2842344994037,2cyclictest0-21swapper/219:31:582
2842346993934,4cyclictest2898473-21turbostat22:05:003
2842346993934,4cyclictest2861601-21turbostat20:10:003
2842346993933,5cyclictest2932653-21turbostat23:50:003
2842346993933,5cyclictest2932653-21turbostat23:49:593
284234699390,38cyclictest2939087-21turbostat00:10:003
284234699390,38cyclictest2939087-21turbostat00:10:003
284234699390,38cyclictest2911462-21turbostat22:45:003
284234699390,38cyclictest2906682-21turbostat22:30:003
2842344993836,1cyclictest0-21swapper/219:55:012
2842344993835,2cyclictest0-21swapper/222:21:002
2842344993835,2cyclictest0-21swapper/220:22:592
2842344993834,2cyclictest0-21swapper/222:19:552
284234499380,35cyclictest0-21swapper/223:48:592
284234499380,35cyclictest0-21swapper/223:48:582
284234499380,35cyclictest0-21swapper/222:35:012
284234499380,2cyclictest0-21swapper/222:44:552
2842341993833,4cyclictest2890539-21kworker/u8:0+flush-179:022:00:211
2842341993812,9cyclictest2885568-21cut21:25:011
284234199380,37cyclictest0-21swapper/120:13:001
2842346993733,3cyclictest2848871-21turbostat19:30:013
2842344993734,2cyclictest0-21swapper/220:37:592
2842344993734,2cyclictest0-21swapper/219:38:002
2842344993733,2cyclictest0-21swapper/221:44:592
284234499370,35cyclictest0-21swapper/220:13:592
284234499370,35cyclictest0-21swapper/220:09:002
284234499370,35cyclictest0-21swapper/219:45:592
284234499370,35cyclictest0-21swapper/200:23:002
284234499370,1cyclictest0-21swapper/223:27:592
2842341993729,6cyclictest2932905-21apt-get23:50:111
4577091360,14ptp4l61490irq/134-eno1-TxRx-023:40:013
2842344993634,1cyclictest0-21swapper/222:04:592
2842344993633,2cyclictest0-21swapper/221:38:592
284234499360,1cyclictest0-21swapper/221:15:002
2842341993633,2cyclictest714-21Xorg19:34:581
2842341993632,3cyclictest2890539-21kworker/u8:0+flush-179:022:10:271
2842346993530,4cyclictest2942261-21turbostat00:20:003
2842346993529,5cyclictest2885479-21turbostat21:25:003
2842346993528,6cyclictest2909847-21turbostat22:40:003
284234699350,1cyclictest0-21swapper/321:49:593
284234699350,1cyclictest0-21swapper/319:44:543
2842341993533,1cyclictest0-21swapper/123:40:581
4577091340,6ptp4l61490irq/134-eno1-TxRx-023:05:003
2842346993432,1cyclictest0-21swapper/321:51:593
2842346993432,1cyclictest0-21swapper/319:17:593
2842346993432,1cyclictest0-21swapper/300:12:583
2842346993429,4cyclictest2913043-21turbostat22:49:593
2842346993427,6cyclictest2867962-21turbostat20:30:003
2842344993432,1cyclictest0-21swapper/221:05:002
2842344993431,2cyclictest0-21swapper/223:55:592
2842344993431,2cyclictest0-21swapper/221:06:592
2842344993431,2cyclictest0-21swapper/219:20:002
2842344993431,2cyclictest0-21swapper/200:10:002
2842344993431,2cyclictest0-21swapper/200:09:592
2842339993428,5cyclictest2890542-21kworker/u8:2+flush-179:021:45:210
2842344993330,2cyclictest0-21swapper/221:16:592
2842344993329,2cyclictest0-21swapper/221:34:592
284234199339,9cyclictest2938536-21ntp_states00:05:211
284234199339,9cyclictest2938536-21ntp_states00:05:211
2842346993230,1cyclictest0-21swapper/323:43:593
2842346993226,5cyclictest2922579-21turbostat23:20:003
2842344993230,1cyclictest0-21swapper/200:35:002
2842344993229,2cyclictest0-21swapper/222:46:592
284234199329,8cyclictest714-21Xorg00:21:591
2842346993129,1cyclictest0-21swapper/321:56:593
2842346993129,1cyclictest0-21swapper/321:39:553
2842346993129,1cyclictest0-21swapper/320:44:593
2842346993126,4cyclictest2919416-21turbostat23:10:003
2842346993126,4cyclictest2888911-21turbostat21:35:003
2842346993125,5cyclictest2843837-21turbostat19:15:003
2842344993128,2cyclictest0-21swapper/221:00:012
2842346993026,2cyclictest0-21swapper/323:10:153
284234699300,28cyclictest0-21swapper/323:25:033
2842344993027,2cyclictest0-21swapper/223:05:142
2842344993027,2cyclictest0-21swapper/221:25:132
2842344993027,2cyclictest0-21swapper/220:31:592
2842344993027,2cyclictest0-21swapper/220:17:592
2842344993027,2cyclictest0-21swapper/219:10:132
2842344993026,2cyclictest0-21swapper/222:57:592
2842344993026,2cyclictest0-21swapper/222:57:592
2842344993026,2cyclictest0-21swapper/222:50:132
284234499300,28cyclictest0-21swapper/223:20:132
4577091290,6ptp4l441ktimers/322:55:013
2842346992927,1cyclictest0-21swapper/323:54:003
2842346992927,1cyclictest0-21swapper/320:20:143
2842346992927,1cyclictest0-21swapper/320:10:143
284234699290,27cyclictest0-21swapper/321:10:123
284234699290,27cyclictest0-21swapper/319:45:143
284234699290,21cyclictest0-21swapper/322:10:143
2842344992927,1cyclictest0-21swapper/221:50:002
2842344992926,2cyclictest0-21swapper/223:40:112
2842344992926,2cyclictest0-21swapper/221:58:592
284234499290,28cyclictest0-21swapper/223:30:012
284234499290,27cyclictest0-21swapper/223:35:132
284234499290,27cyclictest0-21swapper/223:15:132
284234499290,27cyclictest0-21swapper/220:45:122
284234499290,27cyclictest0-21swapper/200:00:132
284234199296,10cyclictest2853076-21ntp_kernel_pll_19:40:201
2842346992826,1cyclictest0-21swapper/323:55:123
2842346992826,1cyclictest0-21swapper/323:21:003
2842346992826,1cyclictest0-21swapper/322:05:013
2842346992826,1cyclictest0-21swapper/300:00:133
2842346992823,4cyclictest2869555-21turbostat20:35:003
284234699280,26cyclictest0-21swapper/300:20:143
2842344992825,2cyclictest0-21swapper/223:00:122
2842344992825,2cyclictest0-21swapper/221:50:132
2842344992825,2cyclictest0-21swapper/221:24:592
284234499280,2cyclictest0-21swapper/220:41:002
4577091270,6ptp4l441ktimers/322:34:563
4577091270,6ptp4l441ktimers/319:40:003
4577091270,6ptp4l441ktimers/300:40:003
4577091270,5ptp4l441ktimers/300:35:013
2842346992725,1cyclictest0-21swapper/322:56:593
2842346992725,1cyclictest0-21swapper/322:56:593
2842346992725,1cyclictest0-21swapper/321:41:593
2842346992725,1cyclictest0-21swapper/320:50:153
2842346992725,1cyclictest0-21swapper/320:45:123
284234699270,26cyclictest0-21swapper/323:33:583
284234699270,26cyclictest0-21swapper/319:50:583
2842344992724,2cyclictest0-21swapper/220:28:592
2842344992724,2cyclictest0-21swapper/200:14:592
2842344992723,2cyclictest0-21swapper/219:21:592
4577091260,5ptp4l441ktimers/320:19:573
2842346992624,1cyclictest0-21swapper/320:39:003
2842344992623,2cyclictest0-21swapper/223:52:002
2842344992623,1cyclictest0-21swapper/219:41:592
2842344992622,2cyclictest0-21swapper/219:26:592
284234499260,24cyclictest0-21swapper/222:28:592
284234499260,24cyclictest0-21swapper/200:25:142
4577091250,5ptp4l61490irq/134-eno1-TxRx-021:09:563
4577091250,5ptp4l61490irq/134-eno1-TxRx-019:24:553
4577091250,5ptp4l441ktimers/319:34:563
4577091250,4ptp4l61490irq/134-eno1-TxRx-021:19:553
2842344992521,2cyclictest0-21swapper/220:54:552
2842344992521,2cyclictest0-21swapper/200:15:582
284234499250,23cyclictest0-21swapper/223:12:592
4577091240,5ptp4l61490irq/134-eno1-TxRx-000:30:003
4577091240,4ptp4l441ktimers/321:00:003
2842344992320,2cyclictest0-21swapper/219:58:592
2842344992319,2cyclictest0-21swapper/222:14:592
2842346992220,1cyclictest0-21swapper/321:27:593
2842344992219,2cyclictest0-21swapper/200:35:592
2842339992217,3cyclictest0-21swapper/019:10:010
2842344992117,2cyclictest0-21swapper/220:03:582
2842344991915,2cyclictest0-21swapper/222:38:582
28423449930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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