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2026-08-21 - 01:30
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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 Thu Aug 20, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
132338599152140,9cyclictest1213033-21systemd-journal07:40:001
132338599144134,7cyclictest1362710-21latency_hist09:10:021
132338599140128,9cyclictest1405641-21latency_hist11:20:021
132338199139129,8cyclictest1412272-21latency_hist11:40:000
132338199139129,7cyclictest1395866-21kworker/u8:2+events_unbound10:55:000
132338199138126,5cyclictest1390775-21kworker/u8:3+events_unbound10:35:000
132338599133105,22cyclictest1392387-21apt-get10:40:021
132338199126115,8cyclictest1395832-21latency_hist10:50:020
132338199126115,8cyclictest1395832-21latency_hist10:50:010
132338199125117,5cyclictest1352945-21kworker/u8:1+flush-179:008:40:000
132338199125117,5cyclictest1323081-21kworker/u8:1+events_unbound07:10:190
1323381991240,121cyclictest1-21systemd09:44:590
132338199122107,5cyclictest1330252-21kworker/u8:0+flush-179:007:55:250
132338199118112,4cyclictest1330252-21kworker/u8:0+flush-179:007:50:000
132338199118106,9cyclictest1328426-21latency_hist07:25:010
132338599117106,8cyclictest1330252-21kworker/u8:0+flush-179:008:30:171
132338199117111,4cyclictest1404279-21kworker/u8:1+flush-179:011:20:230
132338199117107,7cyclictest1424970-21kworker/u8:0+flush-179:012:25:150
132338599116102,12cyclictest1356073-21kworker/u8:2+flush-179:009:15:011
132338199116109,5cyclictest1373891-21kworker/u8:1+events_unbound11:00:000
132338199116109,4cyclictest1417021-21kworker/u8:0+flush-179:012:00:220
132338199114109,4cyclictest1328403-21kworker/u8:3+events_unbound07:25:240
132338199114107,5cyclictest1364845-21kworker/u8:0+flush-179:009:25:220
132338599113101,9cyclictest1335378-21/usr/sbin/munin07:45:221
132338199112104,6cyclictest1424970-21kworker/u8:0+events_unbound12:20:010
13233859911197,11cyclictest1428204-21apt-get12:30:001
132338199111101,7cyclictest1420469-21/usr/sbin/munin12:05:240
132338199111100,5cyclictest1390775-21kworker/u8:3+flush-179:010:35:240
132338599109101,5cyclictest1347872-21latency_hist08:25:011
132338199109104,4cyclictest1415433-21kworker/u8:1+events_unbound11:50:240
132338199109103,5cyclictest1341540-21kworker/u8:2+events_unbound08:15:240
13233819910899,5cyclictest1410663-21kworker/u8:3+flush-179:011:40:190
132338199108101,5cyclictest1322442-21kworker/u8:0+events_unbound07:15:260
132338199108100,6cyclictest1356073-21kworker/u8:2+flush-179:008:55:270
13233819910799,5cyclictest1330252-21kworker/u8:0+flush-179:008:05:250
13233819910798,7cyclictest1351290-21kworker/u8:2+flush-179:008:35:010
13233819910797,7cyclictest1356073-21kworker/u8:2+flush-179:009:10:130
13233859910699,5cyclictest1323081-21kworker/u8:1+flush-179:007:15:271
13233819910699,5cyclictest1395866-21kworker/u8:2+events_unbound11:10:150
13233859910595,7cyclictest1423405-21latency_hist12:15:011
13233819910597,5cyclictest1356073-21kworker/u8:2+flush-179:009:00:190
13233819910496,5cyclictest1356073-21kworker/u8:2+flush-179:009:35:160
13233819910495,6cyclictest1356073-21kworker/u8:2+flush-179:009:15:250
13233859910392,8cyclictest1330252-21kworker/u8:0+flush-179:008:20:011
13233819910293,5cyclictest1354499-21latency_hist08:45:020
13233859910192,6cyclictest1400016-21kworker/u8:0+flush-179:011:00:211
13233859910186,11cyclictest1213033-21systemd-journal12:35:001
13233859910088,8cyclictest1373891-21kworker/u8:1+flush-179:009:50:221
13233819910094,4cyclictest1373891-21kworker/u8:1+events_unbound10:30:000
13233819910091,6cyclictest1373891-21kworker/u8:1+flush-179:011:00:150
1323381999991,6cyclictest1417075-21kworker/u8:2+flush-179:011:55:200
1323381999990,7cyclictest1413848-21kworker/u8:0+flush-179:011:45:190
1323381999983,6cyclictest1341540-21kworker/u8:2+flush-179:008:10:250
1323385999884,10cyclictest1356073-21kworker/u8:2+flush-179:008:50:241
1323381999891,5cyclictest1372244-21kworker/u8:3+events_unbound09:50:020
1323385999687,7cyclictest1323643-21apt-get07:10:101
1323381999688,6cyclictest1424970-21kworker/u8:0+events_unbound12:30:010
1323381999688,6cyclictest1333546-21latency_hist07:40:010
1323385999587,5cyclictest1364845-21kworker/u8:0+events_unbound09:40:211
1323385999485,5cyclictest1373891-21kworker/u8:1+flush-179:010:25:011
1323385999485,5cyclictest1373891-21kworker/u8:1+flush-179:010:25:011
1323385999482,9cyclictest1375441-21latency_hist09:50:011
1323381999486,5cyclictest1383889-21kworker/u8:2+flush-179:010:20:150
1323381999486,5cyclictest1383889-21kworker/u8:2+flush-179:010:20:150
1323385999386,5cyclictest1370663-21latency_hist09:35:021
1323385999385,5cyclictest1347923-21kworker/u8:3+flush-179:008:25:151
1323381999385,6cyclictest1430008-21kworker/u8:2+events_unbound12:35:220
1323381999385,5cyclictest1417075-21kworker/u8:2+events_unbound12:20:210
1323381999385,5cyclictest1364845-21kworker/u8:0+flush-179:010:10:190
1323381999375,7cyclictest1352945-21kworker/u8:1+events_unbound08:45:150
1323381999288,3cyclictest1356073-21kworker/u8:2+flush-179:009:30:250
1323381999286,5cyclictest1334577-21kworker/u8:3+flush-179:007:40:250
1323381999184,5cyclictest1364845-21kworker/u8:0+events_unbound10:05:230
1323381999184,5cyclictest1347923-21kworker/u8:3+flush-179:008:25:170
1323385999084,4cyclictest1423369-21kworker/u8:1+flush-179:012:15:131
1323385999082,5cyclictest1424970-21kworker/u8:0+flush-179:012:35:231
1323385999081,6cyclictest1369076-21latency_hist09:30:011
1323381999080,7cyclictest1323100-21latency_hist07:10:030
1323385998977,9cyclictest1364845-21kworker/u8:0+flush-179:009:20:011
1323385998967,19cyclictest1402202-21latency_hist11:10:011
1323381998980,6cyclictest1334577-21kworker/u8:3+flush-179:007:50:160
1323381998780,5cyclictest1409321-21kworker/u8:0+flush-179:011:30:210
1323381998780,5cyclictest1409321-21kworker/u8:0+flush-179:011:30:200
1323381998780,4cyclictest1364845-21kworker/u8:0+flush-179:009:20:250
1323385998679,5cyclictest1326794-21kworker/u8:2+flush-179:007:30:211
1323385998675,7cyclictest1373891-21kworker/u8:1+events_unbound10:30:031
1323381998679,4cyclictest1356073-21kworker/u8:2+events_unbound09:05:190
1323381998579,4cyclictest1364845-21kworker/u8:0+flush-179:010:00:160
1323381998480,3cyclictest1341540-21kworker/u8:2+events_unbound08:20:230
1323381998475,6cyclictest1404279-21kworker/u8:1+events_unbound11:15:200
1323385998373,7cyclictest1410663-21kworker/u8:3+flush-179:011:40:221
1323381998377,4cyclictest1417021-21kworker/u8:0+flush-179:012:10:200
1323381998377,4cyclictest1372244-21kworker/u8:3+flush-179:009:45:140
1323385998269,9cyclictest1417021-21kworker/u8:0+events_unbound12:00:171
1323381998175,4cyclictest1356073-21kworker/u8:2+flush-179:008:50:150
1323381998165,5cyclictest1395866-21kworker/u8:2+events_unbound11:05:230
1323385998067,10cyclictest1213033-21systemd-journal07:25:011
1323385997968,8cyclictest1403784-21latency_hist11:15:011
1323381997972,5cyclictest1404279-21kworker/u8:1+flush-179:011:25:220
1323385997869,5cyclictest1330252-21kworker/u8:0+flush-179:008:10:171
1323381997770,4cyclictest1340465-21kworker/u8:1+events_unbound08:00:190
1323385997668,6cyclictest1417021-21kworker/u8:0+events_unbound12:00:011
1323385997570,3cyclictest1395866-21kworker/u8:2+events_unbound10:55:211
1323385997567,6cyclictest1390775-21kworker/u8:3+flush-179:010:35:251
1323381997561,5cyclictest1364845-21kworker/u8:0+events_unbound09:55:230
1323385997469,3cyclictest1334577-21kworker/u8:3+flush-179:007:50:131
1323385997462,9cyclictest1380481-21latency_hist10:05:011
1323385997366,5cyclictest1364845-21kworker/u8:0+flush-179:009:20:211
1323385997259,8cyclictest1404279-21kworker/u8:1+flush-179:011:20:191
1323385997165,4cyclictest1417075-21kworker/u8:2+flush-179:012:20:141
1323385997162,6cyclictest1213033-21systemd-journal11:55:011
1323385996951,16cyclictest1410663-21kworker/u8:3+events_unbound11:50:001
1323385996864,2cyclictest1356073-21kworker/u8:2+flush-179:008:58:571
1323385996862,4cyclictest1364845-21kworker/u8:0+events_unbound10:05:241
1323385996761,4cyclictest1417021-21kworker/u8:0+flush-179:012:05:231
1323385996761,4cyclictest1364845-21kworker/u8:0+flush-179:010:10:151
1323381996660,4cyclictest1326794-21kworker/u8:2+events_unbound07:30:230
1323385996562,2cyclictest1404279-21kworker/u8:1+flush-179:011:29:561
1323385996553,9cyclictest1352945-21kworker/u8:1+events_unbound08:45:181
1323385996551,7cyclictest1385477-21kworker/u8:0+events_unbound10:25:191
1323381996559,4cyclictest1373891-21kworker/u8:1+flush-179:010:40:250
1323385996456,6cyclictest1409321-21kworker/u8:0+flush-179:011:33:571
1323385996456,6cyclictest1409321-21kworker/u8:0+flush-179:011:33:561
1323385996456,6cyclictest1373891-21kworker/u8:1+flush-179:010:45:231
1323385996456,6cyclictest1373891-21kworker/u8:1+flush-179:010:45:221
1323385996155,4cyclictest1356073-21kworker/u8:2+events_unbound09:00:231
1323385996153,6cyclictest1377522-21/usr/sbin/munin09:55:231
1323385996055,4cyclictest1334577-21kworker/u8:3+flush-179:007:40:201
1323385996054,4cyclictest1340465-21kworker/u8:1+flush-179:008:00:221
1323385996053,4cyclictest1330252-21kworker/u8:0+flush-179:007:55:141
1323385995952,4cyclictest1326794-21kworker/u8:2+flush-179:007:25:161
1323386995856,1cyclictest0-21swapper/208:54:592
1323385995852,5cyclictest1351290-21kworker/u8:2+flush-179:008:35:221
1323385995750,5cyclictest1370917-21apt-get09:35:121
1323381995651,4cyclictest1373891-21kworker/u8:1+events_unbound10:18:550
1323385995550,4cyclictest1373891-21kworker/u8:1+flush-179:010:50:161
1323385995549,4cyclictest1340465-21kworker/u8:1+events_unbound08:05:211
1323385995448,5cyclictest1383889-21kworker/u8:2+flush-179:010:15:221
1323385995348,4cyclictest1404279-21kworker/u8:1+events_unbound11:35:191
1323385995044,4cyclictest1352945-21kworker/u8:1+flush-179:008:40:261
4577091490,5ptp4l61490irq/134-eno1-TxRx-009:00:003
4577091490,13ptp4l61490irq/134-eno1-TxRx-007:09:563
132338699420,40cyclictest0-21swapper/207:51:592
1323386994037,2cyclictest0-21swapper/210:56:592
1323387993934,4cyclictest1341511-21turbostat08:05:003
1323387993933,5cyclictest0-21swapper/308:10:593
132338699380,35cyclictest0-21swapper/209:35:002
4577091370,4ptp4l431rcuc/309:05:013
1323387993732,4cyclictest1412293-21turbostat11:44:553
1323386993734,2cyclictest0-21swapper/211:31:592
1323386993734,2cyclictest0-21swapper/211:31:592
1323386993734,2cyclictest0-21swapper/210:17:592
1323386993734,2cyclictest0-21swapper/209:23:002
1323386993734,2cyclictest0-21swapper/208:57:582
132338699370,35cyclictest0-21swapper/210:39:592
132338699370,35cyclictest0-21swapper/209:41:592
132338699370,35cyclictest0-21swapper/207:24:592
1323386993633,2cyclictest0-21swapper/212:32:592
132338699360,1cyclictest0-21swapper/208:10:002
132338799350,1cyclictest0-21swapper/311:07:003
1323386993532,2cyclictest0-21swapper/211:40:592
1323386993532,2cyclictest0-21swapper/210:23:002
1323386993532,2cyclictest0-21swapper/210:22:592
1323386993532,2cyclictest0-21swapper/209:18:592
1323386993532,2cyclictest0-21swapper/208:49:002
1323386993532,2cyclictest0-21swapper/207:43:592
1323386993531,2cyclictest0-21swapper/211:23:592
132338699350,1cyclictest0-21swapper/210:02:592
132338699350,1cyclictest0-21swapper/209:00:592
1323387993432,1cyclictest0-21swapper/311:39:593
1323387993432,1cyclictest0-21swapper/307:19:003
132338799340,26cyclictest0-21swapper/309:20:133
132338799340,1cyclictest0-21swapper/311:25:143
1323386993431,2cyclictest0-21swapper/212:12:002
1323386993431,2cyclictest0-21swapper/210:51:002
132338799330,2cyclictest0-21swapper/307:25:013
1323386993331,1cyclictest0-21swapper/208:35:002
1323387993225,6cyclictest0-21swapper/310:25:023
1323386993229,2cyclictest0-21swapper/211:53:592
1323387993125,5cyclictest0-21swapper/312:30:023
1323387993125,5cyclictest0-21swapper/312:10:123
1323387993125,5cyclictest0-21swapper/311:30:133
1323387993125,5cyclictest0-21swapper/311:30:123
1323387993125,5cyclictest0-21swapper/310:00:133
1323387993125,5cyclictest0-21swapper/308:25:113
1323387993124,6cyclictest0-21swapper/310:30:003
1323386993128,2cyclictest0-21swapper/207:49:552
1323387993027,2cyclictest0-21swapper/308:50:013
1323387993023,6cyclictest0-21swapper/309:39:563
1323387993022,6cyclictest1392396-21turbostat10:40:013
132338799300,29cyclictest0-21swapper/312:05:153
132338799300,29cyclictest0-21swapper/311:58:593
132338799300,28cyclictest0-21swapper/310:05:033
132338799300,28cyclictest0-21swapper/308:30:033
132338799300,1cyclictest0-21swapper/307:25:023
1323386993027,2cyclictest0-21swapper/209:55:592
132338699300,28cyclictest0-21swapper/212:30:012
132338699300,28cyclictest0-21swapper/210:05:132
4577091290,7ptp4l441ktimers/308:40:003
4577091290,7ptp4l441ktimers/307:49:553
4577091290,6ptp4l441ktimers/308:45:013
1323387992927,1cyclictest0-21swapper/309:50:023
1323387992926,2cyclictest0-21swapper/312:04:593
132338799290,28cyclictest0-21swapper/312:25:133
132338799290,28cyclictest0-21swapper/309:15:123
132338799290,27cyclictest0-21swapper/309:45:113
132338799290,27cyclictest0-21swapper/309:25:123
132338799290,1cyclictest0-21swapper/311:20:023
1323386992926,2cyclictest0-21swapper/211:35:122
1323386992926,2cyclictest0-21swapper/210:45:132
1323386992926,2cyclictest0-21swapper/210:45:132
1323386992926,2cyclictest0-21swapper/210:40:042
1323386992926,2cyclictest0-21swapper/210:25:022
1323386992926,2cyclictest0-21swapper/209:53:592
1323386992926,2cyclictest0-21swapper/208:40:132
1323386992926,2cyclictest0-21swapper/207:35:112
1323386992926,2cyclictest0-21swapper/207:30:122
1323386992926,2cyclictest0-21swapper/207:15:142
132338699290,27cyclictest0-21swapper/212:35:142
132338699290,27cyclictest0-21swapper/211:15:022
132338699290,27cyclictest0-21swapper/209:05:132
4577091280,6ptp4l61490irq/134-eno1-TxRx-011:20:003
4577091280,6ptp4l441ktimers/308:10:013
1323387992825,2cyclictest0-21swapper/310:20:133
1323387992825,2cyclictest0-21swapper/310:20:133
1323387992825,2cyclictest0-21swapper/307:40:133
132338799280,27cyclictest0-21swapper/308:50:003
132338799280,1cyclictest0-21swapper/312:19:593
1323386992826,1cyclictest0-21swapper/212:00:122
1323386992825,2cyclictest0-21swapper/211:45:122
1323386992825,2cyclictest0-21swapper/210:10:132
1323386992825,2cyclictest0-21swapper/207:25:122
1323386992825,2cyclictest0-21swapper/207:11:592
132338699280,26cyclictest0-21swapper/212:20:132
132338699280,26cyclictest0-21swapper/211:10:132
132338699280,26cyclictest0-21swapper/208:35:142
132338699280,26cyclictest0-21swapper/208:10:142
4577091270,7ptp4l441ktimers/311:50:013
4577091270,7ptp4l441ktimers/311:15:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-009:10:003
4577091270,6ptp4l441ktimers/312:25:003
4577091270,6ptp4l441ktimers/310:50:013
4577091270,6ptp4l441ktimers/310:50:003
4577091270,6ptp4l441ktimers/310:20:003
4577091270,6ptp4l441ktimers/308:00:013
4577091270,5ptp4l441ktimers/307:34:553
1323387992725,1cyclictest0-21swapper/310:53:593
1323387992725,1cyclictest0-21swapper/310:40:123
132338799270,1cyclictest0-21swapper/308:20:113
1323386992724,2cyclictest0-21swapper/211:57:592
1323386992724,2cyclictest0-21swapper/211:01:592
1323386992724,2cyclictest0-21swapper/208:26:592
132338699270,24cyclictest0-21swapper/209:46:582
4577091260,6ptp4l61490irq/134-eno1-TxRx-012:40:013
4577091260,6ptp4l61490irq/134-eno1-TxRx-011:00:003
4577091260,6ptp4l441ktimers/311:04:553
4577091260,5ptp4l61490irq/134-eno1-TxRx-008:19:563
4577091260,5ptp4l441ktimers/309:15:013
4577091260,4ptp4l441ktimers/307:55:013
1323387992624,1cyclictest0-21swapper/307:14:553
132338799260,2cyclictest0-21swapper/309:55:133
132338799260,24cyclictest0-21swapper/309:40:123
1323386992623,2cyclictest0-21swapper/211:25:152
1323386992622,2cyclictest0-21swapper/207:58:592
4577091250,5ptp4l441ktimers/311:54:563
4577091250,5ptp4l441ktimers/309:34:563
4577091250,4ptp4l441ktimers/307:40:013
1323387992523,1cyclictest0-21swapper/310:13:583
1323386992522,2cyclictest0-21swapper/212:19:552
1323386992423,1cyclictest0-21swapper/210:34:592
1323386992321,1cyclictest0-21swapper/209:25:132
1323385992318,3cyclictest0-21swapper/107:10:031
1323386992219,2cyclictest0-21swapper/212:05:142
1323386992118,2cyclictest0-21swapper/211:07:592
1323386992118,2cyclictest0-21swapper/208:22:592
1323386991917,1cyclictest0-21swapper/209:14:582
1323386991815,2cyclictest0-21swapper/208:19:002
1323386991715,1cyclictest0-21swapper/209:37:002
13233869985,2cyclictest0-21swapper/208:00:592
13233869931,1cyclictest0-21swapper/207:10:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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