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2026-04-30 - 16:12
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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 Apr 30, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
213278299143115,24cyclictest1213033-21systemd-journal10:44:221
213277999116106,8cyclictest510-21rs:main0
2132782999979,4cyclictest2166946-21kworker/u8:2+flush-179:010:17:191
2132779999588,4cyclictest2134464-21latency_hist07:15:010
2132782999282,7cyclictest2191034-21latency_hist10:15:011
2132779999061,23cyclictest492-21polkitd10:44:220
2132782998676,7cyclictest2237201-21latency_hist12:35:001
2132782998578,5cyclictest2166946-21kworker/u8:2+flush-179:009:50:011
2132779998577,6cyclictest2203701-21latency_hist10:50:010
2132782998478,4cyclictest2210682-21kworker/u8:3+flush-179:011:20:141
2132782998376,5cyclictest2219691-21latency_hist11:40:011
2132782998275,4cyclictest2169161-21kworker/u8:1+events_unbound09:40:241
2132782998073,5cyclictest1213033-21systemd-journal10:05:381
2132782998072,6cyclictest2210134-21latency_hist11:10:011
2132782997872,4cyclictest2152292-21kworker/u8:3+flush-179:008:10:141
2132779997866,9cyclictest1213033-21systemd-journal08:36:420
2132782997570,4cyclictest2169161-21kworker/u8:1+flush-179:009:50:161
2132782997568,4cyclictest2214963-21kworker/u8:1+flush-179:011:55:201
2132782997468,4cyclictest2136041-21kworker/u8:1+events_unbound07:55:131
2132779997468,4cyclictest2169161-21kworker/u8:1+flush-179:009:45:200
2132782997366,4cyclictest2169161-21kworker/u8:1+flush-179:009:20:241
2132782997266,4cyclictest2186271-21latency_hist10:00:001
2132782997266,4cyclictest2169161-21kworker/u8:1+flush-179:009:35:211
2132782997166,4cyclictest2229276-21kworker/u8:3+flush-179:012:24:461
2132782997166,4cyclictest2198860-21/usr/sbin/munin10:35:221
2132782997166,4cyclictest2169161-21kworker/u8:1+events_unbound09:09:591
2132782997166,4cyclictest2115433-21kworker/u8:2+flush-179:007:20:211
213277999700,67cyclictest714-21Xorg11:49:000
2132782996964,3cyclictest2205300-21kworker/u8:3+flush-179:010:55:221
2132779996959,8cyclictest2208803-21apt-get11:05:110
2132782996857,9cyclictest2195446-21apt-get10:25:121
2132779996857,8cyclictest2167148-21/usr/sbin/munin09:00:240
2132782996762,4cyclictest2210682-21kworker/u8:3+flush-179:011:30:001
2132782996758,6cyclictest2213313-21latency_hist11:20:011
2132782996755,9cyclictest1213033-21systemd-journal10:35:001
2132779996761,4cyclictest2193860-21apt-get10:20:090
2132779996757,8cyclictest2164502-21kworker/u8:0+flush-179:009:00:010
2132779996754,10cyclictest2183334-21apt-get09:50:110
2132782996660,4cyclictest2147513-21kworker/u8:2+flush-179:008:15:161
2132782996560,4cyclictest2136041-21kworker/u8:1+flush-179:007:30:221
2132782996559,4cyclictest2132778-21kworker/u8:3+flush-179:007:15:151
2132782996558,4cyclictest2214963-21kworker/u8:1+flush-179:011:45:211
2132779996556,7cyclictest2136041-21kworker/u8:1+flush-179:007:45:150
2132779996556,7cyclictest2136041-21kworker/u8:1+flush-179:007:45:150
2132779996554,9cyclictest2137917-21apt-get07:25:120
2132787996460,2cyclictest0-21swapper/211:34:592
2132782996455,7cyclictest2162124-21apt-get08:40:101
2132789996356,5cyclictest2206963-21turbostat11:00:003
2132779996354,7cyclictest2147513-21kworker/u8:2+events_unbound08:19:590
2132779996354,6cyclictest2214963-21kworker/u8:1+events_unbound11:50:180
2132789996259,2cyclictest0-21swapper/312:21:593
2132782996154,5cyclictest2229276-21kworker/u8:3+events_unbound12:30:011
2132782996154,5cyclictest2221288-21latency_hist11:45:021
2132782996154,5cyclictest2136041-21kworker/u8:1+events_unbound07:45:141
2132782996154,5cyclictest2136041-21kworker/u8:1+events_unbound07:45:141
2132782996153,6cyclictest2137897-21kworker/u8:0+flush-179:007:40:201
2132779996155,4cyclictest2210682-21kworker/u8:3+events_unbound11:25:000
2132779996155,4cyclictest1213033-21systemd-journal07:50:060
2132782996054,4cyclictest2147513-21kworker/u8:2+flush-179:008:20:241
2132782996048,11cyclictest2164502-21kworker/u8:0+flush-179:009:00:271
2132779996057,2cyclictest0-21swapper/011:55:590
2132787995956,2cyclictest0-21swapper/208:58:002
2132782995953,5cyclictest2210370-21kworker/u8:2+flush-179:011:10:221
2132782995851,5cyclictest2136041-21kworker/u8:1+flush-179:007:40:011
2132779995852,5cyclictest2195181-21kworker/u8:1+flush-179:010:40:000
2132779995849,7cyclictest2132575-21latency_hist07:10:020
2132782995751,4cyclictest2164502-21kworker/u8:0+flush-179:008:55:001
2132782995746,9cyclictest2176490-21kworker/u8:3+flush-179:009:35:001
2132782995745,10cyclictest2203957-21apt-get10:50:091
2132779995750,5cyclictest1213033-21systemd-journal09:24:560
2132779995749,6cyclictest1213033-21systemd-journal12:29:450
2132782995651,4cyclictest2132778-21kworker/u8:3+flush-179:007:10:171
2132782995650,4cyclictest2136041-21kworker/u8:1+flush-179:008:05:241
2132782995648,6cyclictest2166946-21kworker/u8:2+events_unbound09:10:211
2132779995648,6cyclictest2169161-21kworker/u8:1+events_unbound09:05:240
213277999561,52cyclictest1-21systemd12:18:450
2132782995550,3cyclictest2147513-21kworker/u8:2+flush-179:008:45:211
2132779995549,5cyclictest2169161-21kworker/u8:1+flush-179:009:15:000
2132779995548,5cyclictest2169161-21kworker/u8:1+flush-179:009:55:170
2132779995548,5cyclictest2132778-21kworker/u8:3+events_unbound07:15:230
2132779995547,6cyclictest2235868-21apt-get12:30:100
2132779995547,6cyclictest2166946-21kworker/u8:2+events_unbound10:10:000
2132787995451,2cyclictest0-21swapper/212:05:592
2132782995450,3cyclictest2166946-21kworker/u8:2+flush-179:010:05:001
2132782995448,4cyclictest2169161-21kworker/u8:1+flush-179:009:19:461
2132782995446,5cyclictest2226024-21kworker/u8:0+flush-179:012:15:241
2132779995451,2cyclictest2195181-21kworker/u8:1+events_unbound10:30:230
2132779995447,5cyclictest2226024-21kworker/u8:0+events_unbound12:25:010
2132779995447,5cyclictest2214963-21kworker/u8:1+events_unbound11:25:250
2132779995447,5cyclictest2136041-21kworker/u8:1+flush-179:007:45:010
2132779995447,5cyclictest2136041-21kworker/u8:1+flush-179:007:35:210
2132782995345,5cyclictest2191068-21kworker/u8:3+flush-179:010:20:191
2132782995344,8cyclictest2214963-21kworker/u8:1+flush-179:011:50:161
2132779995349,2cyclictest2137897-21kworker/u8:0+events_unbound07:35:010
2132779995342,8cyclictest510-21rs:main0
2132782995247,4cyclictest2208534-21kworker/u8:1+flush-179:011:04:471
2132782995237,5cyclictest2147513-21kworker/u8:2+flush-179:008:00:151
2132779995245,5cyclictest2226024-21kworker/u8:0+events_unbound12:05:130
2132779995243,7cyclictest1213033-21systemd-journal08:45:000
2132779995241,9cyclictest2163996-21diskstats08:45:160
2132782995146,4cyclictest2226024-21kworker/u8:0+flush-179:012:39:551
2132782995146,4cyclictest2147513-21kworker/u8:2+flush-179:008:25:201
2132782995142,7cyclictest2226024-21kworker/u8:0+flush-179:012:05:151
2132779995144,5cyclictest2226024-21kworker/u8:0+flush-179:012:35:220
2132779995144,5cyclictest2169161-21kworker/u8:1+flush-179:009:30:200
2132779995141,8cyclictest2229496-21apt-get12:10:120
2132787995047,2cyclictest0-21swapper/212:23:592
2132782995046,3cyclictest2218106-21kworker/u8:2+events_unbound12:00:231
2132782995045,4cyclictest2229276-21kworker/u8:3+events_unbound12:10:261
2132779995044,5cyclictest2205300-21kworker/u8:3+flush-179:010:59:460
2132782994938,9cyclictest2165844-21diskstats08:55:131
2132779994944,4cyclictest2115433-21kworker/u8:2+flush-179:007:20:160
2132779994943,4cyclictest2166946-21kworker/u8:2+flush-179:009:15:210
2132779994941,6cyclictest2227655-21latency_hist12:05:010
4577091480,13ptp4l441ktimers/307:09:563
2132779994841,5cyclictest2210682-21kworker/u8:3+flush-179:011:30:210
2132779994841,5cyclictest2166946-21kworker/u8:2+flush-179:010:10:230
2132789994741,4cyclictest2161883-21turbostat08:40:003
2132782994741,4cyclictest2136041-21kworker/u8:1+events_unbound07:30:001
2132779994730,4cyclictest1213033-21systemd-journal11:10:520
213277999461,3cyclictest2153862-21perf08:15:010
2132779994538,5cyclictest2201222-21kworker/u8:0+events_unbound10:50:120
2132779994536,6cyclictest2210682-21kworker/u8:3+flush-179:011:40:200
2132779994536,6cyclictest2196776-21latency_hist10:30:010
2132779994439,4cyclictest2136041-21kworker/u8:1+flush-179:008:05:220
2132779994438,4cyclictest2169161-21kworker/u8:1+flush-179:009:25:310
2132779994437,5cyclictest2147513-21kworker/u8:2+flush-179:008:20:170
2132779994436,6cyclictest2169161-21kworker/u8:1+flush-179:009:45:010
2132789994335,6cyclictest2229254-21turbostat12:10:013
2132782994333,6cyclictest0-21swapper/107:52:591
2132779994337,5cyclictest2169161-21kworker/u8:1+flush-179:009:35:150
2132779994336,5cyclictest2207214-21apt-get11:00:120
2132779994336,5cyclictest2166946-21kworker/u8:2+events_unbound10:05:000
2132787994239,2cyclictest0-21swapper/210:46:582
2132782994236,5cyclictest2147513-21kworker/u8:2+flush-179:008:30:201
213277999410,39cyclictest2165050-21turbostat08:54:540
2132782994035,4cyclictest2201222-21kworker/u8:0+flush-179:010:45:211
2132782993935,3cyclictest2176493-21systemd-run09:29:591
2132779993936,2cyclictest714-21Xorg08:01:590
2132779993935,3cyclictest0-21swapper/007:58:590
213278999380,35cyclictest0-21swapper/308:50:593
2132787993834,2cyclictest0-21swapper/211:11:592
213278799380,35cyclictest0-21swapper/209:39:542
2132782993833,4cyclictest2156489-21kworker/u8:1+events_unbound08:35:141
2132789993732,4cyclictest2137661-21turbostat07:25:003
2132787993734,2cyclictest0-21swapper/207:30:592
213278799370,35cyclictest0-21swapper/209:02:592
2132782993731,4cyclictest2133020-21cat07:10:021
2132789993634,1cyclictest0-21swapper/311:28:583
2132789993634,1cyclictest0-21swapper/310:04:583
2132789993634,1cyclictest0-21swapper/307:19:593
2132787993634,1cyclictest0-21swapper/207:44:592
2132787993633,2cyclictest0-21swapper/208:07:582
4577091350,13ptp4l441ktimers/308:35:013
213278999350,29cyclictest0-21swapper/311:08:593
2132787993532,2cyclictest0-21swapper/210:44:002
2132787993532,2cyclictest0-21swapper/209:17:582
2132787993532,2cyclictest0-21swapper/209:12:002
213278799350,1cyclictest0-21swapper/209:30:002
2132779993530,4cyclictest2147513-21kworker/u8:2+events_unbound08:25:230
4577091340,6ptp4l441ktimers/310:20:013
2132789993432,1cyclictest0-21swapper/311:02:583
2132789993432,1cyclictest0-21swapper/310:24:543
2132789993432,1cyclictest0-21swapper/308:09:593
2132787993432,1cyclictest0-21swapper/211:49:592
2132787993431,2cyclictest0-21swapper/212:36:592
2132787993431,2cyclictest0-21swapper/208:34:002
2132789993332,1cyclictest0-21swapper/312:34:593
2132789993331,1cyclictest0-21swapper/310:44:543
2132789993331,1cyclictest0-21swapper/308:46:003
2132789993331,1cyclictest0-21swapper/308:40:593
2132789993230,1cyclictest0-21swapper/311:30:583
213278999320,31cyclictest0-21swapper/307:45:013
2132787993229,2cyclictest0-21swapper/212:18:592
2132787993229,2cyclictest0-21swapper/208:25:002
2132779993225,5cyclictest1213033-21systemd-journal11:39:550
4577091310,5ptp4l61490irq/134-eno1-TxRx-012:04:553
4577091310,5ptp4l61490irq/134-eno1-TxRx-011:44:563
2132789993129,1cyclictest0-21swapper/309:26:593
2132789993129,1cyclictest0-21swapper/308:27:593
2132789993129,1cyclictest0-21swapper/307:14:553
2132789993126,4cyclictest2219696-21turbostat11:40:003
2132787993127,2cyclictest0-21swapper/207:36:592
213278799310,29cyclictest0-21swapper/212:00:122
213278299311,28cyclictest0-21swapper/111:30:121
2132789993028,1cyclictest0-21swapper/312:10:593
2132789993028,1cyclictest0-21swapper/307:34:553
2132787993028,1cyclictest0-21swapper/209:09:592
2132787993027,2cyclictest0-21swapper/211:25:122
2132787993027,2cyclictest0-21swapper/208:36:592
2132787993027,2cyclictest0-21swapper/207:45:122
2132787993027,2cyclictest0-21swapper/207:45:122
2132787993027,2cyclictest0-21swapper/207:25:132
213278799300,29cyclictest0-21swapper/210:35:032
213278799300,29cyclictest0-21swapper/207:55:112
213278799300,28cyclictest0-21swapper/209:40:142
213278799300,28cyclictest0-21swapper/208:15:132
213277999301,1cyclictest2158891-21apt-get08:30:130
4577091290,7ptp4l441ktimers/310:30:003
4577091290,6ptp4l441ktimers/312:00:003
4577091290,6ptp4l441ktimers/311:55:003
2132789992927,1cyclictest0-21swapper/310:06:583
2132789992927,1cyclictest0-21swapper/310:00:003
2132789992927,1cyclictest0-21swapper/309:41:003
213278999290,28cyclictest0-21swapper/310:35:123
213278999290,28cyclictest0-21swapper/308:55:103
213278999290,27cyclictest0-21swapper/310:30:133
213278999290,27cyclictest0-21swapper/309:15:123
213278999290,27cyclictest0-21swapper/308:20:133
213278999290,27cyclictest0-21swapper/307:50:133
2132787992926,2cyclictest0-21swapper/209:50:122
2132787992926,2cyclictest0-21swapper/209:47:592
2132787992926,2cyclictest0-21swapper/209:30:122
2132787992926,2cyclictest0-21swapper/207:12:592
2132787992925,2cyclictest0-21swapper/208:13:592
213278799290,27cyclictest0-21swapper/211:50:132
213278799290,27cyclictest0-21swapper/209:55:132
4577091280,7ptp4l61490irq/134-eno1-TxRx-011:50:013
4577091280,7ptp4l441ktimers/311:25:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-012:20:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-009:25:013
4577091280,6ptp4l441ktimers/308:00:013
4577091280,6ptp4l441ktimers/307:30:003
4577091280,5ptp4l441ktimers/309:05:013
213278999280,2cyclictest0-21swapper/309:50:013
213278999280,2cyclictest0-21swapper/307:45:023
213278999280,2cyclictest0-21swapper/307:45:023
213278999280,27cyclictest0-21swapper/310:50:123
213278999280,26cyclictest0-21swapper/311:15:123
213278999280,26cyclictest0-21swapper/309:45:123
213278999280,26cyclictest0-21swapper/307:35:123
2132787992825,2cyclictest0-21swapper/212:30:122
213278799280,2cyclictest0-21swapper/210:10:142
4577091270,7ptp4l441ktimers/309:15:003
2132789992725,1cyclictest0-21swapper/308:10:113
213278999270,26cyclictest0-21swapper/310:15:003
2132787992724,2cyclictest0-21swapper/211:07:592
2132787992724,2cyclictest0-21swapper/211:00:582
2132787992724,2cyclictest0-21swapper/210:56:002
2132787992723,2cyclictest0-21swapper/210:18:582
213278799270,2cyclictest0-21swapper/210:33:582
4577091260,5ptp4l61490irq/134-eno1-TxRx-009:35:003
4577091260,5ptp4l61490irq/134-eno1-TxRx-008:19:573
4577091260,5ptp4l441ktimers/312:29:553
4577091260,5ptp4l441ktimers/311:14:563
4577091260,4ptp4l441ktimers/309:40:013
2132787992623,2cyclictest0-21swapper/208:45:142
2132787992623,2cyclictest0-21swapper/208:43:592
213278799260,24cyclictest0-21swapper/207:50:592
4577091250,4ptp4l61490irq/134-eno1-TxRx-012:39:553
4577091250,4ptp4l441ktimers/309:10:013
213278999250,24cyclictest2203706-21turbostat10:50:003
2132787992522,2cyclictest0-21swapper/210:27:592
2132787992522,2cyclictest0-21swapper/209:23:582
2132787992521,2cyclictest0-21swapper/211:15:592
213278799250,2cyclictest0-21swapper/211:43:582
2132789992422,1cyclictest0-21swapper/308:04:543
2132787992422,1cyclictest0-21swapper/208:04:592
2132787992421,2cyclictest0-21swapper/211:56:592
2132787992421,2cyclictest0-21swapper/210:20:112
2132787992320,2cyclictest0-21swapper/212:11:002
2132787992320,2cyclictest0-21swapper/211:21:592
2132787992219,1cyclictest0-21swapper/211:37:592
2132787992017,2cyclictest0-21swapper/212:28:592
2132787992017,2cyclictest0-21swapper/210:53:592
2132787992017,2cyclictest0-21swapper/210:00:132
2132787992017,2cyclictest0-21swapper/207:21:592
2132787991815,2cyclictest0-21swapper/208:50:592
2132787991714,2cyclictest0-21swapper/210:06:582
2132787991714,2cyclictest0-21swapper/208:27:582
2132787991412,1cyclictest0-21swapper/207:18:592
21327879952,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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