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2026-06-17 - 00:26
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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 Tue Jun 16, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119326899130120,8cyclictest1226678-21latency_hist08:55:000
119326999118108,7cyclictest1234901-21latency_hist09:20:011
119326899118105,10cyclictest1213033-21systemd-journal09:40:010
119326999108100,5cyclictest1259282-21latency_hist10:35:011
11932689910796,8cyclictest1209215-21kworker/u8:0+flush-179:008:15:240
11932689910695,8cyclictest1275207-21latency_hist11:25:000
11932689910598,5cyclictest1283453-21kworker/u8:0+events_unbound12:10:000
11932699910395,6cyclictest1219761-21kworker/u8:0+flush-179:008:35:251
11932699910291,9cyclictest1244961-21apt-get09:50:111
11932689910296,4cyclictest1219761-21kworker/u8:0+flush-179:008:35:220
11932699910090,7cyclictest1262477-21latency_hist10:45:001
1193268999993,5cyclictest1285050-21kworker/u8:1+flush-179:012:15:000
1193268999992,5cyclictest1243098-21kworker/u8:1+events_unbound09:45:240
1193268999685,9cyclictest1212611-21apt-get08:10:110
1193268999681,6cyclictest1243098-21kworker/u8:1+flush-179:010:05:010
1193268999386,5cyclictest1209215-21kworker/u8:0+flush-179:008:25:010
1193269999285,5cyclictest1244495-21kworker/u8:2+flush-179:010:05:261
1193269999280,9cyclictest1279981-21apt-get11:40:011
1193268999285,5cyclictest1255984-21kworker/u8:3+flush-179:010:30:020
1193269999180,7cyclictest1206026-21kworker/u8:2+flush-179:007:50:211
1193268998982,5cyclictest1259317-21kworker/u8:0+flush-179:011:15:220
1193269998880,6cyclictest1252656-21latency_hist10:15:011
1193269998779,5cyclictest1238059-21kworker/u8:1+events_unbound09:35:011
1193268998677,7cyclictest1251071-21latency_hist10:10:010
1193268998580,4cyclictest1272047-21kworker/u8:1+flush-179:011:30:010
1193268998579,4cyclictest1244495-21kworker/u8:2+flush-179:010:10:240
1193268998477,5cyclictest1294550-21kworker/u8:1+flush-179:012:25:230
1193268998477,5cyclictest1294550-21kworker/u8:1+flush-179:012:25:230
1193268998473,8cyclictest1255852-21latency_hist10:25:010
1193268998377,4cyclictest1281821-21kworker/u8:3+flush-179:011:50:160
1193269998272,8cyclictest1244455-21apt-get09:50:001
1193268998275,5cyclictest1223550-21kworker/u8:3+flush-179:008:55:260
1193268998173,6cyclictest1236473-21kworker/u8:0+flush-179:009:50:240
1193269997969,8cyclictest1288200-21latency_hist12:05:011
1193268997972,4cyclictest1206026-21kworker/u8:2+flush-179:008:05:200
1193271997847,29cyclictest0-21swapper/211:08:592
1193269997870,6cyclictest1259317-21kworker/u8:0+flush-179:010:45:221
1193268997872,4cyclictest1294550-21kworker/u8:1+events_unbound12:35:240
1193268997871,5cyclictest1191689-21kworker/u8:1+events_unbound07:45:240
1193268997870,6cyclictest1238083-21latency_hist09:30:010
1193268997770,5cyclictest1260923-21kworker/u8:2+flush-179:011:15:010
1193268997764,11cyclictest1213033-21systemd-journal07:40:000
1193268997671,4cyclictest1217746-21kworker/u8:2+events_unbound09:05:240
1193268997670,4cyclictest1288244-21kworker/u8:3+flush-179:012:15:230
1193268997668,5cyclictest1217746-21kworker/u8:2+flush-179:009:10:160
1193268997668,5cyclictest1217746-21kworker/u8:2+flush-179:009:10:160
1193269997566,6cyclictest1268877-21kworker/u8:3+flush-179:011:10:151
1193268997569,4cyclictest1217746-21kworker/u8:2+events_unbound08:50:010
1193268997565,8cyclictest1285261-21apt-get11:55:110
1193269997465,7cyclictest1244495-21kworker/u8:2+flush-179:009:55:161
1193269997365,6cyclictest1244495-21kworker/u8:2+flush-179:010:20:001
1193268997369,3cyclictest1268877-21kworker/u8:3+flush-179:011:09:550
1193269997263,7cyclictest1283420-21latency_hist11:50:001
1193269997260,9cyclictest1296151-21latency_hist12:30:021
1193269997260,9cyclictest1296151-21latency_hist12:30:011
1193268997164,4cyclictest1199568-21true07:30:000
1193268997065,3cyclictest1206026-21kworker/u8:2+flush-179:007:50:150
1193268997063,5cyclictest1279959-21kworker/u8:2+events_unbound11:45:230
1193269996963,4cyclictest1209215-21kworker/u8:0+flush-179:008:15:151
1193269996960,7cyclictest1191689-21kworker/u8:1+flush-179:007:45:001
1193269996960,5cyclictest1229876-21kworker/u8:1+events_unbound09:10:011
1193268996964,4cyclictest1272047-21kworker/u8:1+flush-179:011:40:180
1193268996963,4cyclictest1217746-21kworker/u8:2+flush-179:009:15:210
1193269996861,5cyclictest1259317-21kworker/u8:0+flush-179:010:50:171
1193269996858,8cyclictest1213033-21systemd-journal09:45:001
1193269996762,4cyclictest1189849-21kworker/u8:2+flush-179:007:10:211
1193268996758,7cyclictest1210771-21latency_hist08:05:000
1193268996747,17cyclictest1213033-21systemd-journal12:34:320
1193269996659,5cyclictest1279959-21kworker/u8:2+events_unbound11:45:011
1193268996662,3cyclictest1217746-21kworker/u8:2+flush-179:008:45:010
1193268996659,5cyclictest1189849-21kworker/u8:2+flush-179:007:10:160
1193268996657,6cyclictest1260923-21kworker/u8:2+flush-179:011:00:150
1193268996657,6cyclictest1259317-21kworker/u8:0+events_unbound10:35:170
1193269996556,6cyclictest1238059-21kworker/u8:1+flush-179:009:35:171
1193269996556,6cyclictest1213033-21systemd-journal07:20:261
1193269996555,8cyclictest1283453-21kworker/u8:0+flush-179:012:09:591
1193268996559,5cyclictest1272047-21kworker/u8:1+flush-179:011:34:550
1193269996453,9cyclictest1229885-21apt-get09:05:001
1193268996456,5cyclictest1285050-21kworker/u8:1+flush-179:012:00:230
1193269996356,5cyclictest1249485-21latency_hist10:05:021
1193269996352,9cyclictest1213033-21systemd-journal11:10:001
1193269996256,4cyclictest1294550-21kworker/u8:1+flush-179:012:25:001
1193269996255,5cyclictest1206026-21kworker/u8:2+flush-179:008:10:211
1193268996255,5cyclictest1206026-21kworker/u8:2+flush-179:007:55:250
1193268996252,8cyclictest1235164-21apt-get09:20:130
1193269996151,7cyclictest1260923-21kworker/u8:2+flush-179:010:55:151
1193268996051,7cyclictest1217746-21kworker/u8:2+events_unbound08:35:000
1193268996050,8cyclictest1195009-21apt-get07:15:100
1193269995954,4cyclictest1202717-21cp07:38:001
1193269995952,5cyclictest1199535-21latency_hist07:30:011
1193268995951,5cyclictest1244495-21kworker/u8:2+flush-179:010:15:230
1193269995853,4cyclictest1260923-21kworker/u8:2+flush-179:011:30:001
1193269995851,5cyclictest1283453-21kworker/u8:0+flush-179:011:55:251
1193268995853,4cyclictest1255984-21kworker/u8:3+flush-179:010:34:550
1193269995751,4cyclictest1219761-21kworker/u8:0+flush-179:008:40:161
1193269995748,7cyclictest1283453-21kworker/u8:0+flush-179:011:55:001
119326999570,55cyclictest1-21systemd08:00:011
1193268995752,4cyclictest1225633-21kworker/u8:0+flush-179:009:01:300
1193269995651,4cyclictest1217746-21kworker/u8:2+events_unbound09:25:241
1193269995649,5cyclictest1213033-21systemd-journal10:24:291
1193268995550,4cyclictest1259317-21kworker/u8:0+events_unbound10:45:170
1193269995445,7cyclictest1191689-21kworker/u8:1+flush-179:007:30:251
1193268995445,6cyclictest1-21systemd09:44:590
1193268995246,5cyclictest1191689-21kworker/u8:1+events_unbound07:30:270
1193269995144,5cyclictest1213033-21systemd-journal12:14:421
1193269995141,7cyclictest1217746-21kworker/u8:2+events_unbound08:30:221
1193268995145,5cyclictest1189849-21kworker/u8:2+flush-179:007:20:240
1193268995144,5cyclictest1293233-21apt-get12:20:110
1193268995144,5cyclictest1189849-21kworker/u8:2+events_unbound07:10:010
1193268995135,5cyclictest1243098-21kworker/u8:1+events_unbound10:00:010
1193274995048,1cyclictest0-21swapper/311:35:593
1193269995045,4cyclictest1217746-21kworker/u8:2+flush-179:009:20:221
1193269995038,10cyclictest1233280-21kworker/u8:0+flush-179:009:15:011
1193269995038,10cyclictest1233280-21kworker/u8:0+flush-179:009:15:011
1193268995046,3cyclictest1259317-21kworker/u8:0+flush-179:010:57:300
1193268995044,4cyclictest1238059-21kworker/u8:1+flush-179:009:30:230
4577091490,14ptp4l441ktimers/307:10:003
1193274994947,1cyclictest0-21swapper/310:40:593
1193269994936,5cyclictest1294550-21kworker/u8:1+flush-179:012:35:001
1193269994930,18cyclictest1206077-21latency_hist07:50:011
119326999491,32cyclictest1211025-21apt-get08:05:141
1193269994843,4cyclictest1260923-21kworker/u8:2+flush-179:011:20:181
1193269994843,4cyclictest1223550-21kworker/u8:3+events_unbound08:55:241
1193269994742,4cyclictest1191689-21kworker/u8:1+events_unbound07:15:221
1193269994741,4cyclictest1291624-21apt-get12:15:121
1193268994738,7cyclictest1272047-21kworker/u8:1+flush-179:011:35:200
1193268994540,4cyclictest1202787-21kworker/u8:0+events_unbound07:40:200
1193269994437,5cyclictest1294550-21kworker/u8:1+flush-179:012:35:261
1193268994441,2cyclictest1259317-21kworker/u8:0+events_unbound10:50:190
1193268994440,3cyclictest1260923-21kworker/u8:2+flush-179:010:44:560
1193269994335,6cyclictest1259317-21kworker/u8:0+flush-179:011:00:241
1193271994239,2cyclictest0-21swapper/211:42:582
1193271994239,2cyclictest0-21swapper/207:27:592
119327199420,40cyclictest0-21swapper/209:01:592
1193274994139,1cyclictest0-21swapper/307:10:593
1193269994122,17cyclictest1259317-21kworker/u8:0+events_unbound11:20:001
1193274994038,1cyclictest0-21swapper/309:47:003
119327499400,37cyclictest0-21swapper/308:10:003
1193274993938,1cyclictest0-21swapper/309:25:593
1193274993937,1cyclictest0-21swapper/312:06:003
1193269993931,5cyclictest1217746-21kworker/u8:2+flush-179:008:45:211
1193268993931,5cyclictest1209215-21kworker/u8:0+events_unbound08:25:130
1193274993833,4cyclictest1265665-21turbostat10:55:013
1193269993833,4cyclictest1209215-21kworker/u8:0+flush-179:008:00:231
4577091370,4ptp4l431rcuc/309:35:003
1193274993732,4cyclictest1267244-21turbostat11:04:553
1193271993734,2cyclictest0-21swapper/208:19:552
1193271993733,2cyclictest0-21swapper/208:57:592
119327199370,35cyclictest0-21swapper/212:07:592
119327199370,35cyclictest0-21swapper/211:32:002
119327199370,35cyclictest0-21swapper/208:31:592
119327199370,2cyclictest0-21swapper/209:29:552
1193274993634,1cyclictest0-21swapper/311:49:003
1193274993634,1cyclictest0-21swapper/309:56:593
1193274993634,1cyclictest0-21swapper/309:15:593
1193269993629,5cyclictest1213976-21kworker/u8:1+flush-179:008:20:211
1193269993622,13cyclictest1217746-21kworker/u8:2+flush-179:008:50:171
1193274993533,1cyclictest0-21swapper/312:14:593
1193274993533,1cyclictest0-21swapper/311:16:003
1193271993532,2cyclictest0-21swapper/207:39:592
119327199350,1cyclictest0-21swapper/211:14:592
119326999353,4cyclictest1217394-21apt-get08:25:121
1193269993532,2cyclictest714-21Xorg10:28:581
1193269993529,5cyclictest1259317-21kworker/u8:0+events_unbound10:35:241
1193274993432,1cyclictest0-21swapper/311:12:593
1193274993431,2cyclictest0-21swapper/308:13:593
1193271993431,2cyclictest0-21swapper/212:38:002
1193274993331,1cyclictest0-21swapper/310:16:593
119327499330,27cyclictest0-21swapper/310:10:143
1193271993330,2cyclictest0-21swapper/212:34:592
1193271993330,2cyclictest0-21swapper/210:34:562
1193274993225,1cyclictest0-21swapper/307:39:563
1193271993229,2cyclictest0-21swapper/208:24:552
1193271993229,2cyclictest0-21swapper/208:09:542
119327199320,30cyclictest0-21swapper/210:26:592
1193274993129,1cyclictest0-21swapper/312:02:003
1193274993125,1cyclictest0-21swapper/308:50:143
119327499310,29cyclictest0-21swapper/311:25:133
1193271993128,2cyclictest0-21swapper/208:45:592
119327199310,30cyclictest0-21swapper/211:04:552
4577091300,7ptp4l441ktimers/311:24:593
1193274993028,1cyclictest0-21swapper/312:29:553
1193274993028,1cyclictest0-21swapper/312:29:553
1193274993028,1cyclictest0-21swapper/308:59:553
1193274993027,2cyclictest0-21swapper/308:25:123
1193274993026,2cyclictest4577091ptp4l09:35:163
119327499300,26cyclictest0-21swapper/309:05:033
119327199300,2cyclictest0-21swapper/210:55:122
119327199300,2cyclictest0-21swapper/209:45:122
119327199300,28cyclictest0-21swapper/209:55:132
1193269993025,4cyclictest1272047-21kworker/u8:1+events_unbound11:30:231
1193274992927,1cyclictest0-21swapper/312:33:003
1193274992927,1cyclictest0-21swapper/310:28:593
1193274992923,5cyclictest1233315-21turbostat09:15:013
1193274992923,5cyclictest1233315-21turbostat09:15:013
119327499290,2cyclictest0-21swapper/311:55:133
119327499290,28cyclictest0-21swapper/310:45:143
119327499290,28cyclictest0-21swapper/308:00:133
119327499290,27cyclictest0-21swapper/307:50:143
119327499290,27cyclictest0-21swapper/307:30:123
119327499290,26cyclictest0-21swapper/309:50:133
1193271992926,2cyclictest0-21swapper/212:10:592
1193271992926,2cyclictest0-21swapper/209:05:132
119327199290,28cyclictest0-21swapper/211:40:022
119327199290,27cyclictest0-21swapper/211:45:112
119327199290,27cyclictest0-21swapper/210:05:142
119327199290,27cyclictest0-21swapper/209:40:132
119327199290,27cyclictest0-21swapper/209:30:122
119327199290,27cyclictest0-21swapper/209:20:152
119327199290,27cyclictest0-21swapper/208:35:132
119327199290,27cyclictest0-21swapper/208:26:592
119327199290,27cyclictest0-21swapper/207:40:142
1193274992826,1cyclictest0-21swapper/312:15:143
1193274992826,1cyclictest0-21swapper/307:20:143
1193274992825,2cyclictest0-21swapper/307:15:593
119327499280,28cyclictest0-21swapper/308:45:133
119327499280,27cyclictest0-21swapper/310:09:593
119327499280,26cyclictest0-21swapper/310:20:143
1193271992825,2cyclictest0-21swapper/211:50:142
1193271992825,2cyclictest0-21swapper/211:22:592
1193271992825,2cyclictest0-21swapper/209:15:132
119327199280,2cyclictest0-21swapper/210:50:142
119327199280,27cyclictest0-21swapper/207:45:112
119327199280,26cyclictest0-21swapper/209:50:022
119327199280,21cyclictest0-21swapper/212:21:592
119327199280,1cyclictest0-21swapper/210:40:142
4577091270,6ptp4l61490irq/134-eno1-TxRx-011:35:013
4577091270,6ptp4l441ktimers/311:00:003
4577091270,6ptp4l441ktimers/307:45:003
4577091270,5ptp4l441ktimers/311:44:593
1193274992721,5cyclictest1260879-21turbostat10:40:003
119327499270,1cyclictest0-21swapper/308:19:553
1193271992725,1cyclictest0-21swapper/209:15:012
1193271992725,1cyclictest0-21swapper/209:15:012
1193271992725,1cyclictest0-21swapper/208:54:592
119327199270,25cyclictest0-21swapper/211:55:132
4577091260,6ptp4l61490irq/134-eno1-TxRx-011:54:543
4577091260,6ptp4l61490irq/134-eno1-TxRx-007:50:013
4577091260,6ptp4l441ktimers/308:35:003
4577091260,5ptp4l61490irq/134-eno1-TxRx-010:34:593
4577091260,5ptp4l441ktimers/312:24:573
4577091260,5ptp4l441ktimers/310:04:563
4577091260,5ptp4l441ktimers/309:44:593
4577091260,5ptp4l441ktimers/309:25:003
119327499260,25cyclictest0-21swapper/312:37:593
1193271992624,1cyclictest0-21swapper/210:39:582
1193271992623,2cyclictest0-21swapper/210:20:582
1193271992623,2cyclictest0-21swapper/207:13:582
1193271992622,2cyclictest0-21swapper/212:15:592
119327199260,24cyclictest0-21swapper/210:10:142
119327199260,24cyclictest0-21swapper/208:11:592
119327199260,24cyclictest0-21swapper/207:57:002
119327199260,24cyclictest0-21swapper/207:25:002
4577091250,5ptp4l61490irq/134-eno1-TxRx-008:24:563
1193274992523,1cyclictest0-21swapper/309:04:593
1193271992523,1cyclictest0-21swapper/209:39:592
1193271992523,1cyclictest0-21swapper/208:01:592
1193271992523,1cyclictest0-21swapper/207:53:592
119327199250,2cyclictest0-21swapper/211:27:582
119327199250,2cyclictest0-21swapper/211:16:002
119327199250,23cyclictest0-21swapper/212:29:562
119327199250,23cyclictest0-21swapper/212:29:552
1193269992520,4cyclictest0-21swapper/107:10:011
4577091240,4ptp4l441ktimers/308:39:553
1193274992422,1cyclictest0-21swapper/307:28:583
1193274992421,2cyclictest0-21swapper/307:57:593
1193271992421,2cyclictest0-21swapper/208:43:592
1193271992421,2cyclictest0-21swapper/207:15:112
1193271992320,2cyclictest0-21swapper/210:19:002
1193271992220,1cyclictest0-21swapper/212:01:592
1193271992219,2cyclictest0-21swapper/210:48:002
1193274991715,1cyclictest0-21swapper/311:05:123
4577091140,7ptp4l61490irq/134-eno1-TxRx-008:40:293
1193271991411,2cyclictest0-21swapper/207:33:592
119327199108,1cyclictest0-21swapper/210:00:122
11932719930,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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