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2026-05-20 - 19:09
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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 May 20, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
295485199118107,8cyclictest3061101-21latency_hist12:40:021
295484899118106,9cyclictest2994801-21latency_hist09:15:010
295484899114102,9cyclictest2954742-21kworker/u8:2+flush-179:007:15:010
295484899109102,5cyclictest3040435-21kworker/u8:3+flush-179:012:05:000
29548489910899,6cyclictest1213033-21systemd-journal08:35:010
29548519910496,5cyclictest3041992-21latency_hist11:40:011
29548519910293,7cyclictest2986848-21latency_hist08:50:011
29548519910190,8cyclictest2997996-21latency_hist09:25:021
29548519910184,11cyclictest1213033-21systemd-journal09:40:001
29548519910092,5cyclictest3008722-21kworker/u8:3+flush-179:010:45:231
2954851999282,7cyclictest3019206-21apt-get10:30:001
2954851999178,10cyclictest1213033-21systemd-journal09:10:011
2954848999184,4cyclictest2961135-21kworker/u8:3+flush-179:008:05:160
2954848999175,13cyclictest3003082-21true09:40:010
2954851998982,4cyclictest3047786-21kworker/u8:0+flush-179:011:55:241
2954848998579,4cyclictest3028660-21kworker/u8:1+flush-179:011:30:010
2954851998476,6cyclictest3054695-21kworker/u8:2+flush-179:012:20:011
2954851998476,6cyclictest3007091-21kworker/u8:0+flush-179:010:00:001
2954848998478,5cyclictest3001409-21kworker/u8:1+flush-179:009:40:250
2954851998377,4cyclictest2993452-21kworker/u8:0+flush-179:009:15:141
2954848998374,6cyclictest2986883-21kworker/u8:3+flush-179:008:55:220
2954848998171,7cyclictest3017646-21kworker/u8:2+flush-179:010:35:140
2954851998073,6cyclictest2982047-21kworker/u8:0+flush-179:008:50:241
2954851997869,7cyclictest3014415-21latency_hist10:15:011
2954848997870,5cyclictest2962686-21latency_hist07:35:010
2954848997667,7cyclictest2963229-21diskstats07:35:150
2954851997566,7cyclictest3008722-21kworker/u8:3+flush-179:010:40:201
2954851997468,4cyclictest2954742-21kworker/u8:2+flush-179:007:45:261
2954851997466,5cyclictest3057915-21latency_hist12:30:001
2954848997464,8cyclictest510-21rs:main0
2954851997365,7cyclictest2957879-21kworker/u8:0+flush-179:007:20:221
2954851997264,5cyclictest3006722-21apt-get09:50:121
2954851997262,8cyclictest3003552-21apt-get09:40:111
2954848997162,6cyclictest3028660-21kworker/u8:1+flush-179:011:15:160
2954851997047,21cyclictest3021049-21apt-get10:35:001
2954848997063,5cyclictest2969592-21apt-get07:55:120
2954848997061,7cyclictest2996365-21kworker/u8:2+flush-179:009:20:000
2954851996961,6cyclictest2957879-21kworker/u8:0+flush-179:007:30:011
2954848996960,7cyclictest3044136-21diskstats11:45:140
2954851996862,4cyclictest2954742-21kworker/u8:2+flush-179:007:40:221
2954851996862,4cyclictest2937332-21kworker/u8:3+flush-179:007:10:181
2954848996863,3cyclictest3040435-21kworker/u8:3+flush-179:011:40:140
2954848996756,9cyclictest2959768-21apt-get07:25:120
2954851996659,5cyclictest2972565-21kworker/u8:1+events_unbound08:15:191
2954848996659,5cyclictest3012876-21kworker/u8:1+events_unbound10:30:000
2954848996647,17cyclictest2957928-21latency_hist07:20:010
2954851996558,6cyclictest3028660-21kworker/u8:1+flush-179:011:35:011
2954851996557,6cyclictest2964360-21kworker/u8:0+flush-179:008:00:011
2954851996552,12cyclictest1213033-21systemd-journal10:10:001
2954851996458,5cyclictest3007091-21kworker/u8:0+flush-179:010:00:211
2954851996458,4cyclictest2991619-21kworker/u8:1+flush-179:009:10:151
2954851996452,10cyclictest3029531-21apt-get11:00:131
2954848996358,3cyclictest2964360-21kworker/u8:0+flush-179:007:50:270
2954848996358,3cyclictest2964360-21kworker/u8:0+flush-179:007:50:260
2954851996254,6cyclictest3008722-21kworker/u8:3+flush-179:011:10:141
2954851996254,5cyclictest2972565-21kworker/u8:1+flush-179:008:10:221
2954848996255,4cyclictest3056362-21kworker/u8:3+flush-179:012:35:240
2954851996155,5cyclictest3040435-21kworker/u8:3+flush-179:011:40:211
2954851996151,8cyclictest3047786-21kworker/u8:0+events_unbound12:30:141
2954848996157,3cyclictest2986883-21kworker/u8:3+events_unbound09:00:170
2954848996153,5cyclictest2991619-21kworker/u8:1+flush-179:009:05:150
2954848996151,7cyclictest3024494-21latency_hist10:45:010
2954848996143,16cyclictest2974372-21apt-get08:10:110
2954848996140,19cyclictest510-21rs:main0
2954851996055,4cyclictest2996365-21kworker/u8:2+events_unbound09:45:231
2954851996053,5cyclictest3012876-21kworker/u8:1+events_unbound10:15:151
2954851996050,7cyclictest2980481-21latency_hist08:30:011
2954848996052,6cyclictest2972565-21kworker/u8:1+flush-179:008:15:260
2954855995952,5cyclictest3051558-21turbostat12:10:003
2954854995956,2cyclictest0-21swapper/212:27:002
2954851995953,5cyclictest3047786-21kworker/u8:0+flush-179:012:10:161
2954848995952,5cyclictest3030907-21kworker/u8:2+flush-179:011:20:260
2954848995851,5cyclictest2977569-21kworker/u8:2+flush-179:008:20:160
2954848995851,5cyclictest2977569-21kworker/u8:2+flush-179:008:20:150
2954855995754,2cyclictest0-21swapper/312:27:003
2954851995752,4cyclictest3028660-21kworker/u8:1+flush-179:011:25:001
2954851995752,3cyclictest3017646-21kworker/u8:2+flush-179:010:35:041
2954848995750,5cyclictest3008722-21kworker/u8:3+events_unbound11:05:250
2954848995746,8cyclictest3025790-21kworker/u8:0+flush-179:010:55:200
2954851995651,4cyclictest2986883-21kworker/u8:3+flush-179:009:00:261
2954848995650,5cyclictest2983913-21kworker/u8:2+flush-179:008:40:160
2954848995648,7cyclictest3039475-21kworker/u8:0+flush-179:011:30:210
2954851995549,5cyclictest2972565-21kworker/u8:1+events_unbound08:30:241
2954848995547,6cyclictest2959512-21latency_hist07:25:000
2954851995448,4cyclictest2983913-21kworker/u8:2+flush-179:008:40:201
2954851995447,5cyclictest2977569-21kworker/u8:2+events_unbound08:20:241
2954851995447,5cyclictest2977569-21kworker/u8:2+events_unbound08:20:241
2954851995446,6cyclictest2954742-21kworker/u8:2+flush-179:007:15:221
2954848995448,4cyclictest2982047-21kworker/u8:0+flush-179:008:45:200
2954848995445,7cyclictest3008722-21kworker/u8:3+flush-179:010:05:200
2954851995344,7cyclictest3054999-21apt-get12:20:101
2954848995349,3cyclictest2982047-21kworker/u8:0+flush-179:008:50:230
2954848995348,4cyclictest3051782-21kworker/u8:1+events_unbound12:15:230
2954848995348,4cyclictest2996365-21kworker/u8:2+flush-179:009:45:220
2954848995346,5cyclictest3047786-21kworker/u8:0+flush-179:012:30:190
2954851995242,8cyclictest2986883-21kworker/u8:3+flush-179:008:55:261
2954848995244,6cyclictest3028660-21kworker/u8:1+flush-179:011:00:230
2954851995146,4cyclictest3028660-21kworker/u8:1+events_unbound11:15:201
2954851995146,4cyclictest2996365-21kworker/u8:2+flush-179:009:25:191
2954851995146,4cyclictest2996365-21kworker/u8:2+flush-179:009:25:191
2954851995144,6cyclictest2997974-21kworker/u8:0+flush-179:009:30:211
2954848995141,8cyclictest2998251-21apt-get09:25:110
2954848995141,8cyclictest2998251-21apt-get09:25:100
2954851995046,2cyclictest3030907-21kworker/u8:2+events_unbound11:45:241
2954848995044,5cyclictest3008722-21kworker/u8:3+flush-179:010:25:010
2954848995044,5cyclictest3008722-21kworker/u8:3+flush-179:010:25:010
4577091490,13ptp4l61490irq/134-eno1-TxRx-007:10:003
2954851994943,4cyclictest2982047-21kworker/u8:0+flush-179:008:35:151
2954848994946,2cyclictest2996365-21kworker/u8:2+events_unbound10:00:140
2954848994926,6cyclictest3009668-21latency_hist10:00:020
2954855994846,1cyclictest0-21swapper/309:16:593
2954851994840,7cyclictest3047786-21kworker/u8:0+flush-179:012:00:201
2954848994838,8cyclictest2996365-21kworker/u8:2+events_unbound09:20:130
2954851994741,5cyclictest3025790-21kworker/u8:0+flush-179:010:55:161
2954848994740,5cyclictest3054695-21kworker/u8:2+flush-179:012:25:160
2954851994642,3cyclictest714-21Xorg08:04:581
2954851994640,5cyclictest2961135-21kworker/u8:3+flush-179:008:05:211
2954848994641,4cyclictest2982047-21kworker/u8:0+flush-179:008:35:140
2954848994640,4cyclictest321-21hwrng10:15:590
2954851994439,4cyclictest2961086-21kworker/u8:1+events_unbound07:30:251
2954848994436,6cyclictest2966145-21/usr/sbin/munin07:45:170
295485199432,37cyclictest3026337-21apt-get10:50:131
2954848994336,5cyclictest3051546-21latency_hist12:10:010
2954848994336,5cyclictest3008722-21kworker/u8:3+flush-179:010:45:200
295485199421,39cyclictest3032466-21dump-pmu-power11:10:011
2954851994131,9cyclictest3047786-21kworker/u8:0+flush-179:012:05:251
2954855994035,3cyclictest3014428-21turbostat10:15:003
2954851994035,3cyclictest714-21Xorg11:53:581
2954848994034,4cyclictest3040435-21kworker/u8:3+events_unbound11:50:130
295485599390,37cyclictest0-21swapper/309:22:583
295485499390,36cyclictest0-21swapper/210:04:552
2954851993934,4cyclictest2961135-21kworker/u8:3+flush-179:007:35:151
295485599380,37cyclictest3027680-21turbostat10:55:003
2954854993835,2cyclictest0-21swapper/211:32:592
2954854993834,2cyclictest0-21swapper/211:07:592
2954854993834,2cyclictest0-21swapper/211:00:592
2954854993834,2cyclictest0-21swapper/210:31:592
295485499380,36cyclictest0-21swapper/210:15:002
295485499380,35cyclictest0-21swapper/211:44:552
295485499380,35cyclictest0-21swapper/208:54:542
295485499380,35cyclictest0-21swapper/207:37:592
295485499380,2cyclictest0-21swapper/209:22:582
2954848993832,5cyclictest3007091-21kworker/u8:0+flush-179:009:51:120
295484899380,37cyclictest0-21swapper/010:12:590
295485599370,35cyclictest0-21swapper/308:45:593
295485599370,35cyclictest0-21swapper/307:33:593
295485599370,1cyclictest0-21swapper/309:37:583
2954854993734,2cyclictest0-21swapper/211:12:592
2954854993733,2cyclictest0-21swapper/212:15:592
295485499370,35cyclictest0-21swapper/210:39:592
295485499370,35cyclictest0-21swapper/209:19:002
295485499370,2cyclictest0-21swapper/208:45:592
295485499370,2cyclictest0-21swapper/207:33:582
295485499370,29cyclictest0-21swapper/208:23:592
295485499370,29cyclictest0-21swapper/208:23:582
295485499370,1cyclictest0-21swapper/208:00:002
2954851993730,5cyclictest3017611-21latency_hist10:25:021
2954851993730,5cyclictest3017611-21latency_hist10:25:011
2954848993731,5cyclictest3043586-21kworker/0:0+pm12:15:010
231999370,4rtkit-daemon2318-21rtkit-daemon11:35:570
231999370,4rtkit-daemon2318-21rtkit-daemon10:50:520
2954855993633,2cyclictest0-21swapper/311:12:593
2954855993633,2cyclictest0-21swapper/307:35:593
2954855993633,2cyclictest0-21swapper/307:25:593
2954855993632,3cyclictest0-21swapper/311:00:593
295485599360,35cyclictest0-21swapper/311:49:553
295485599360,35cyclictest0-21swapper/310:04:553
295485599360,35cyclictest0-21swapper/308:54:553
295485599360,35cyclictest0-21swapper/308:34:553
295485599360,35cyclictest0-21swapper/308:23:593
295485599360,35cyclictest0-21swapper/308:23:583
295485599360,1cyclictest0-21swapper/310:58:593
2954854993633,2cyclictest0-21swapper/209:50:002
2954854993632,2cyclictest0-21swapper/212:13:002
2954854993632,2cyclictest0-21swapper/209:51:592
2954854993632,2cyclictest0-21swapper/209:29:002
2954854993632,2cyclictest0-21swapper/209:28:592
2954851993631,4cyclictest3030907-21kworker/u8:2+events_unbound11:30:011
2954848993633,2cyclictest2954742-21kworker/u8:2+events_unbound08:00:240
2954855993533,1cyclictest0-21swapper/311:29:593
2954855993533,1cyclictest0-21swapper/311:20:583
2954854993532,2cyclictest0-21swapper/212:39:592
2954854993532,2cyclictest0-21swapper/211:56:002
2954854993532,2cyclictest0-21swapper/208:11:002
295485499350,1cyclictest0-21swapper/209:37:582
2954848993532,2cyclictest0-21swapper/008:28:590
2954855993432,1cyclictest0-21swapper/311:32:593
2954855993432,1cyclictest0-21swapper/311:07:593
2954855993432,1cyclictest0-21swapper/309:49:593
2954855993431,2cyclictest0-21swapper/312:40:003
2954854993431,2cyclictest0-21swapper/211:46:582
2954854993431,2cyclictest0-21swapper/211:25:002
2954854993430,2cyclictest0-21swapper/210:18:592
2954854993430,2cyclictest0-21swapper/209:40:592
2954854993430,2cyclictest0-21swapper/208:33:592
2954851993427,5cyclictest2954742-21kworker/u8:2+flush-179:007:50:171
2954851993427,5cyclictest2954742-21kworker/u8:2+flush-179:007:50:161
2954848993428,5cyclictest2997974-21kworker/u8:0+flush-179:009:30:210
231999340,8rtkit-daemon23940-21sendmail-mta07:07:540
4577091330,13ptp4l61490irq/134-eno1-TxRx-007:15:003
2954855993331,1cyclictest0-21swapper/312:15:583
2954855993331,1cyclictest0-21swapper/310:31:593
2954855993331,1cyclictest0-21swapper/309:51:593
2954855993330,2cyclictest0-21swapper/308:14:593
2954854993330,2cyclictest0-21swapper/210:09:552
2954855993230,1cyclictest0-21swapper/312:13:003
2954855993230,1cyclictest0-21swapper/309:29:003
2954855993230,1cyclictest0-21swapper/309:28:593
2954854993228,2cyclictest0-21swapper/212:02:582
2954855993129,1cyclictest0-21swapper/311:55:593
2954855993129,1cyclictest0-21swapper/309:41:003
2954854993128,2cyclictest0-21swapper/210:47:592
2954854993127,2cyclictest0-21swapper/208:06:592
2954854993127,2cyclictest0-21swapper/207:51:592
2954854993127,2cyclictest0-21swapper/207:51:592
295485499310,29cyclictest0-21swapper/210:25:122
295485499310,29cyclictest0-21swapper/208:00:122
2954848993124,5cyclictest3034032-21latency_hist11:15:010
2954855993029,1cyclictest0-21swapper/312:21:593
2954855993027,2cyclictest0-21swapper/308:00:133
295485599300,28cyclictest0-21swapper/307:55:033
295485599300,27cyclictest0-21swapper/310:25:123
2954854993027,2cyclictest0-21swapper/212:05:142
2954854993027,2cyclictest0-21swapper/207:15:142
2954854993026,2cyclictest0-21swapper/212:33:592
2954854993026,2cyclictest0-21swapper/211:50:592
295485499300,29cyclictest0-21swapper/207:24:592
295485499300,23cyclictest0-21swapper/209:30:032
4577091290,7ptp4l441ktimers/311:55:013
4577091290,7ptp4l441ktimers/307:55:013
4577091290,7ptp4l441ktimers/307:55:003
2954855992927,1cyclictest0-21swapper/310:47:593
2954855992927,1cyclictest0-21swapper/310:19:003
2954855992927,1cyclictest0-21swapper/310:09:553
295485599290,2cyclictest4577091ptp4l10:35:023
295485599290,28cyclictest0-21swapper/309:30:033
295485599290,27cyclictest0-21swapper/308:25:133
295485599290,1cyclictest0-21swapper/311:15:123
295485499290,2cyclictest0-21swapper/211:25:122
295485499290,2cyclictest0-21swapper/207:11:592
295485499290,27cyclictest0-21swapper/211:15:122
295485499290,27cyclictest0-21swapper/209:10:122
295485499290,27cyclictest0-21swapper/208:55:142
295484899290,28cyclictest0-21swapper/011:55:120
4577091280,7ptp4l441ktimers/307:50:013
4577091280,6ptp4l441ktimers/311:45:003
295485599280,2cyclictest0-21swapper/312:00:143
295485599280,27cyclictest0-21swapper/308:55:133
295485599280,27cyclictest0-21swapper/307:15:143
295485599280,26cyclictest0-21swapper/309:10:133
2954854992825,2cyclictest0-21swapper/207:25:122
2954854992824,2cyclictest0-21swapper/210:44:552
2954854992824,2cyclictest0-21swapper/209:57:592
295485499280,2cyclictest0-21swapper/208:25:142
295485499280,27cyclictest0-21swapper/210:52:592
2954848992823,4cyclictest321-21hwrng07:40:100
4577091270,6ptp4l61490irq/134-eno1-TxRx-008:40:013
4577091270,4ptp4l441ktimers/308:20:003
2954855992725,1cyclictest0-21swapper/308:06:593
295485599270,26cyclictest0-21swapper/312:33:583
295485599270,18cyclictest0-21swapper/309:07:583
2954854992725,1cyclictest0-21swapper/208:45:002
4577091260,6ptp4l441ktimers/311:40:003
4577091260,6ptp4l441ktimers/310:24:563
4577091260,6ptp4l441ktimers/310:24:563
4577091260,5ptp4l441ktimers/309:59:573
4577091260,5ptp4l441ktimers/309:04:553
2954855992623,2cyclictest0-21swapper/308:40:593
295485599260,24cyclictest0-21swapper/307:24:583
2954854992623,2cyclictest0-21swapper/208:35:582
2954854992622,2cyclictest0-21swapper/210:24:002
2954854992622,2cyclictest0-21swapper/210:23:592
295485499260,2cyclictest0-21swapper/209:07:582
4577091250,5ptp4l441ktimers/310:44:553
4577091240,4ptp4l441ktimers/307:44:553
2954854992320,2cyclictest0-21swapper/212:22:582
2954854992320,2cyclictest0-21swapper/208:17:592
2954854992018,1cyclictest0-21swapper/209:04:592
2954854991916,2cyclictest0-21swapper/207:44:002
2954854991613,2cyclictest0-21swapper/207:46:592
2954854991511,2cyclictest0-21swapper/210:56:592
295485199151,11cyclictest2954843-21cyclictest07:10:021
2954854991310,2cyclictest0-21swapper/211:36:592
29548549930,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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