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2026-07-28 - 19:37
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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 Jul 28, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
175583899147134,10cyclictest1213033-21systemd-journal12:23:421
175583899145137,5cyclictest1805351-21latency_hist09:45:001
175583799140130,8cyclictest1845962-21kworker/u8:0+flush-179:012:00:010
175583899138118,17cyclictest1842514-21http11:40:001
175583899133121,9cyclictest1762087-21latency_hist07:30:001
175583799133124,6cyclictest1791029-21latency_hist09:00:020
175583899126115,8cyclictest1779888-21latency_hist08:25:001
175583799125110,11cyclictest1213033-21systemd-journal11:25:000
175583899124114,7cyclictest1786491-21/usr/sbin/munin08:45:251
175583899124112,9cyclictest1213033-21systemd-journal08:05:001
175583899120113,4cyclictest1862145-21latency_hist12:40:001
175583899120111,6cyclictest1781474-21latency_hist08:30:011
17558379911199,9cyclictest1775105-21latency_hist08:10:010
175583799110102,6cyclictest1815124-21kworker/u8:0+events_unbound10:30:010
17558389910998,8cyclictest1818891-21kworker/u8:1+flush-179:010:30:211
17558389910898,8cyclictest1782467-21kworker/u8:0+flush-179:008:30:221
175583899108103,4cyclictest1800437-21kworker/u8:2+events_unbound09:29:591
175583899107100,5cyclictest1751226-21kworker/u8:2+flush-179:007:40:001
17558389910296,4cyclictest1811699-21kworker/u8:2+flush-179:010:25:241
17558379910290,8cyclictest1758952-21kworker/u8:1+flush-179:007:40:210
17558379910195,4cyclictest1818891-21kworker/u8:1+flush-179:010:35:010
17558379910092,5cyclictest1803801-21kworker/u8:3+events_unbound09:55:000
1755838999991,6cyclictest1776946-21apt-get08:15:141
1755838999989,8cyclictest1795790-21latency_hist09:15:001
1755838999887,8cyclictest1818891-21kworker/u8:1+flush-179:010:45:151
1755837999890,6cyclictest1778938-21kworker/u8:1+flush-179:008:30:000
1755837999889,6cyclictest1823809-21kworker/u8:2+flush-179:010:50:010
1755837999887,8cyclictest510-21rs:main0
1755837999887,8cyclictest1840875-21latency_hist11:35:010
1755838999787,8cyclictest1213033-21systemd-journal10:55:001
1755838999786,8cyclictest1771927-21kworker/u8:1+flush-179:008:10:221
1755838999590,3cyclictest1770043-21kworker/u8:0+flush-179:007:55:151
1755838999587,5cyclictest1755749-21kworker/u8:3+flush-179:007:20:221
1755837999585,7cyclictest1773260-21latency_hist08:05:010
1755838999486,6cyclictest1829431-21kworker/u8:0+flush-179:011:10:221
1755837999382,8cyclictest1858966-21latency_hist12:30:010
1755837999379,11cyclictest1808775-21apt-get09:55:100
1755838999278,11cyclictest510-21rs:main1
1755838999184,4cyclictest1855776-21latency_hist12:20:001
1755837999079,9cyclictest1802412-21apt-get09:35:140
1755837998980,6cyclictest1770043-21kworker/u8:0+flush-179:008:00:010
1755838998780,5cyclictest1770043-21kworker/u8:0+flush-179:007:55:001
1755838998779,7cyclictest1845962-21kworker/u8:0+flush-179:012:10:181
1755838998680,4cyclictest1771927-21kworker/u8:1+flush-179:008:05:241
1755838998677,7cyclictest1834740-21kworker/u8:1+flush-179:011:45:221
1755838998677,7cyclictest1834740-21kworker/u8:1+flush-179:011:45:211
1755838998667,18cyclictest1829431-21kworker/u8:0+flush-179:011:00:011
1755838998663,21cyclictest1788848-21kworker/u8:1+events_unbound09:10:011
1755838998579,4cyclictest1788848-21kworker/u8:1+flush-179:008:50:241
1755838998467,14cyclictest1834740-21kworker/u8:1+flush-179:011:55:201
1755837998369,11cyclictest1213033-21systemd-journal10:45:010
1755838998274,6cyclictest1845962-21kworker/u8:0+flush-179:012:05:231
1755838998173,6cyclictest1810383-21apt-get10:00:111
1755838998073,5cyclictest1837138-21kworker/u8:2+flush-179:011:25:181
1755837998072,6cyclictest1751226-21kworker/u8:2+flush-179:007:35:200
1755837998070,7cyclictest1776691-21latency_hist08:15:010
1755838997872,4cyclictest1803801-21kworker/u8:3+events_unbound09:50:241
1755838997772,3cyclictest1839263-21kworker/u8:0+flush-179:011:30:171
1755838997771,5cyclictest1811699-21kworker/u8:2+events_unbound10:19:591
1755838997671,4cyclictest1758952-21kworker/u8:1+flush-179:007:30:211
1755838997569,5cyclictest1784904-21kworker/u8:0+events_unbound09:05:001
1755838997569,4cyclictest1800437-21kworker/u8:2+flush-179:009:35:261
1755837997465,7cyclictest1841178-21cpu11:35:160
1755838997366,5cyclictest1834740-21kworker/u8:1+flush-179:011:20:201
1755838997366,5cyclictest1800437-21kworker/u8:2+events_unbound09:30:191
1755838997363,6cyclictest1751226-21kworker/u8:2+events_unbound07:10:241
1755837997364,6cyclictest1832657-21latency_hist11:10:000
1755837997362,9cyclictest1782015-21diskstats08:30:150
1755838997266,3cyclictest1837138-21kworker/u8:2+events_unbound11:40:141
1755838997265,5cyclictest1788848-21kworker/u8:1+events_unbound09:20:241
1755838997264,6cyclictest1213033-21systemd-journal10:37:461
1755837997265,5cyclictest1843001-21apt-get11:40:110
1755837997264,6cyclictest1845918-21latency_hist11:50:020
1755837997264,6cyclictest1845918-21latency_hist11:50:010
1755837997257,6cyclictest1213033-21systemd-journal07:20:230
1755838997163,6cyclictest1776739-21kworker/u8:3+events_unbound08:35:241
1755838997064,4cyclictest1783047-21kworker/u8:2+flush-179:008:40:161
1755838997063,5cyclictest1788848-21kworker/u8:1+flush-179:008:55:211
1755838996962,5cyclictest1840901-21kworker/u8:3+flush-179:011:50:141
1755838996960,6cyclictest1758908-21latency_hist07:20:011
1755838996761,4cyclictest1818891-21kworker/u8:1+flush-179:010:40:171
1755837996757,8cyclictest1829742-21apt-get11:00:120
1755838996660,4cyclictest1858952-21kworker/u8:0+events_unbound12:30:201
1755837996656,8cyclictest1850983-21latency_hist12:05:020
1755838996557,6cyclictest1845962-21kworker/u8:0+flush-179:012:00:251
1755838996557,6cyclictest1811698-21kworker/u8:1+flush-179:010:05:231
1755837996458,5cyclictest1829431-21kworker/u8:0+flush-179:011:10:140
1755838996359,3cyclictest1803801-21kworker/u8:3+flush-179:009:45:171
1755837996357,4cyclictest1847527-21latency_hist11:55:000
1755838996257,4cyclictest1829431-21kworker/u8:0+events_unbound11:05:251
1755838996256,5cyclictest1815124-21kworker/u8:0+flush-179:010:20:261
1755838996256,4cyclictest1803801-21kworker/u8:3+flush-179:009:55:191
1755838996255,5cyclictest1834740-21kworker/u8:1+events_unbound11:15:201
1755837996255,6cyclictest1854190-21kworker/u8:3+flush-179:012:15:150
1755837996251,8cyclictest510-21rs:main0
1755838996155,5cyclictest1854190-21kworker/u8:3+flush-179:012:25:261
1755838996149,9cyclictest1788848-21kworker/u8:1+flush-179:009:20:011
1755838995957,1cyclictest1763710-21kworker/u8:3+events_unbound07:45:181
1755838995957,1cyclictest1763710-21kworker/u8:3+events_unbound07:45:181
1755844995852,2cyclictest0-21swapper/310:44:593
1755837995851,5cyclictest1806936-21latency_hist09:50:010
1755840995754,2cyclictest0-21swapper/207:49:582
1755840995754,2cyclictest0-21swapper/207:49:582
1755838995751,3cyclictest1823809-21kworker/u8:2+events_unbound11:00:111
1755837995753,3cyclictest1213033-21systemd-journal07:35:000
1755837995751,4cyclictest1793654-21kworker/u8:3+flush-179:009:10:250
1755837995647,6cyclictest1823110-21latency_hist10:40:000
1755837995549,4cyclictest1783047-21kworker/u8:2+flush-179:008:40:170
1755837995448,4cyclictest1858952-21kworker/u8:0+flush-179:012:35:010
1755837995443,8cyclictest1813334-21http10:10:000
1755844995351,1cyclictest0-21swapper/309:23:593
1755838995347,4cyclictest1758952-21kworker/u8:1+flush-179:007:40:201
1755837995140,8cyclictest1788848-21kworker/u8:1+flush-179:009:25:160
4577091500,13ptp4l61490irq/134-eno1-TxRx-007:10:013
1755837995044,4cyclictest1803801-21kworker/u8:3+flush-179:010:00:030
1755844994947,1cyclictest0-21swapper/310:36:593
1755844994946,2cyclictest0-21swapper/311:23:003
1755837994944,4cyclictest1776739-21kworker/u8:3+flush-179:008:20:260
1755837994941,6cyclictest1811699-21kworker/u8:2+flush-179:010:10:250
1755837994941,6cyclictest1784904-21kworker/u8:0+flush-179:009:05:180
1755837994837,9cyclictest1804022-21apt-get09:40:110
1755837994743,2cyclictest714-21Xorg09:23:590
1755837994741,4cyclictest1751226-21kworker/u8:2+flush-179:007:50:010
1755837994741,4cyclictest1751226-21kworker/u8:2+flush-179:007:50:010
1755837994541,3cyclictest486-21NetworkManager12:23:420
1755837994439,4cyclictest1788848-21kworker/u8:1+flush-179:009:00:240
1755837994439,4cyclictest1751226-21kworker/u8:2+events_unbound07:20:000
1755837994336,5cyclictest1751226-21kworker/u8:2+flush-179:007:50:150
1755837994237,4cyclictest1853447-21kworker/u8:1+events_unbound12:10:240
175584099410,1cyclictest0-21swapper/212:39:592
1755837994138,2cyclictest1776739-21kworker/u8:3+flush-179:008:35:250
1755837994136,4cyclictest1815124-21kworker/u8:0+flush-179:010:20:150
175583799411,3cyclictest0-21swapper/007:15:000
1755837994035,3cyclictest714-21Xorg07:28:000
1755844993937,1cyclictest0-21swapper/311:49:003
1755844993937,1cyclictest0-21swapper/311:48:593
1755840993936,2cyclictest0-21swapper/209:26:592
175584099390,36cyclictest0-21swapper/210:30:002
1755837993935,3cyclictest1858952-21kworker/u8:0+flush-179:012:35:150
1755837993929,8cyclictest1837138-21kworker/u8:2+flush-179:011:25:200
1755844993836,1cyclictest0-21swapper/309:12:593
1755844993830,6cyclictest1842471-21turbostat11:40:013
1755840993836,1cyclictest0-21swapper/210:50:002
175584099380,36cyclictest0-21swapper/212:07:002
175584099380,36cyclictest0-21swapper/209:51:592
1755844993735,1cyclictest0-21swapper/307:41:593
1755844993734,2cyclictest0-21swapper/311:10:593
1755844993734,2cyclictest0-21swapper/309:36:003
1755844993729,6cyclictest1771665-21turbostat08:00:003
175584499370,1cyclictest0-21swapper/309:32:583
1755840993734,2cyclictest0-21swapper/211:37:592
1755840993734,2cyclictest0-21swapper/210:22:002
175584099370,35cyclictest0-21swapper/212:25:002
1755844993634,1cyclictest0-21swapper/309:19:593
1755844993629,6cyclictest0-21swapper/310:59:583
175584499360,35cyclictest0-21swapper/312:26:593
175584499360,35cyclictest0-21swapper/312:15:583
175584499360,35cyclictest0-21swapper/308:04:553
175584499360,29cyclictest0-21swapper/312:24:593
175584499360,1cyclictest0-21swapper/308:14:553
1755840993634,1cyclictest0-21swapper/208:29:592
1755840993633,2cyclictest0-21swapper/209:16:592
1755840993632,2cyclictest0-21swapper/208:34:552
175584099360,1cyclictest0-21swapper/208:06:592
1755837993633,2cyclictest0-21swapper/008:50:000
1755837993626,8cyclictest1796027-21/usr/sbin/munin09:15:150
4577091350,3ptp4l61490irq/134-eno1-TxRx-009:26:593
1755844993533,1cyclictest0-21swapper/307:47:593
1755844993533,1cyclictest0-21swapper/307:47:593
1755844993530,4cyclictest1762099-21turbostat07:30:013
1755840993533,1cyclictest0-21swapper/209:59:592
1755840993532,2cyclictest0-21swapper/210:33:002
1755840993532,2cyclictest0-21swapper/208:13:592
1755837993532,2cyclictest0-21swapper/009:32:580
1755837993528,5cyclictest1845962-21kworker/u8:0+flush-179:012:05:170
1755844993431,2cyclictest0-21swapper/311:04:003
1755844993430,2cyclictest0-21swapper/310:45:593
1755844993429,3cyclictest1840886-21turbostat11:35:013
175584499340,32cyclictest0-21swapper/311:15:023
1755844993331,1cyclictest0-21swapper/307:12:003
1755844993330,2cyclictest0-21swapper/312:12:583
1755844993326,6cyclictest0-21swapper/310:00:593
175584499330,31cyclictest0-21swapper/311:50:133
175584499330,31cyclictest0-21swapper/311:25:133
1755840993330,2cyclictest0-21swapper/208:48:592
1755837993327,5cyclictest1788848-21kworker/u8:1+flush-179:008:50:260
1755837993326,5cyclictest1815402-21apt-get10:15:140
1755844993230,1cyclictest0-21swapper/312:09:553
1755844993230,1cyclictest0-21swapper/309:57:593
175584499320,31cyclictest0-21swapper/311:40:013
175584499320,31cyclictest0-21swapper/310:13:593
1755840993230,1cyclictest0-21swapper/209:10:002
1755840993230,1cyclictest0-21swapper/208:05:002
1755838993226,4cyclictest1755694-21latency_hist07:10:031
175583799325,14cyclictest1826530-21/usr/sbin/munin10:50:180
1755844993125,5cyclictest0-21swapper/308:25:593
4577091300,7ptp4l441ktimers/309:50:003
4577091300,7ptp4l441ktimers/309:45:013
4577091300,7ptp4l441ktimers/307:40:003
4577091300,6ptp4l441ktimers/310:30:013
1755844993026,2cyclictest0-21swapper/308:40:143
175584499300,29cyclictest0-21swapper/307:17:593
175584499300,28cyclictest0-21swapper/310:15:143
1755840993028,1cyclictest0-21swapper/208:25:002
1755840993028,1cyclictest0-21swapper/207:35:002
1755840993027,2cyclictest0-21swapper/211:30:122
175584099300,2cyclictest0-21swapper/210:50:142
4577091290,6ptp4l441ktimers/308:25:003
4577091290,6ptp4l441ktimers/307:55:003
4577091290,6ptp4l441ktimers/307:35:003
231999290,14rtkit-daemon495-21gpm08:19:510
1755844992926,2cyclictest0-21swapper/311:09:543
1755844992926,2cyclictest0-21swapper/310:20:123
175584499290,28cyclictest0-21swapper/308:50:133
175584499290,27cyclictest0-21swapper/308:35:133
175584499290,27cyclictest0-21swapper/307:20:133
1755840992926,2cyclictest0-21swapper/212:25:132
1755840992926,2cyclictest0-21swapper/211:55:122
1755840992926,2cyclictest0-21swapper/207:57:592
175584099290,28cyclictest0-21swapper/211:15:122
175584099290,27cyclictest0-21swapper/212:30:132
175584099290,27cyclictest0-21swapper/212:00:012
175584099290,27cyclictest0-21swapper/210:55:122
175584099290,27cyclictest0-21swapper/209:30:122
175584099290,27cyclictest0-21swapper/207:25:132
4577091280,5ptp4l441ktimers/312:39:563
4577091280,5ptp4l441ktimers/308:50:003
1755844992825,2cyclictest0-21swapper/308:16:593
175584499280,4cyclictest0-21swapper/308:55:593
175584499280,26cyclictest0-21swapper/312:00:033
175584499280,26cyclictest0-21swapper/310:05:143
175584499280,26cyclictest0-21swapper/309:05:153
1755840992825,2cyclictest0-21swapper/212:15:122
1755840992825,2cyclictest0-21swapper/211:54:002
1755840992825,2cyclictest0-21swapper/211:15:012
1755840992825,2cyclictest0-21swapper/210:10:132
1755840992825,2cyclictest0-21swapper/210:09:562
1755840992825,2cyclictest0-21swapper/209:40:132
1755840992825,2cyclictest0-21swapper/207:40:122
175584099280,2cyclictest0-21swapper/207:10:122
4577091270,5ptp4l441ktimers/312:00:003
4577091270,5ptp4l441ktimers/309:54:563
4577091270,5ptp4l441ktimers/308:35:013
4577091270,5ptp4l441ktimers/308:10:013
4577091270,4ptp4l441ktimers/309:05:013
1755840992724,2cyclictest0-21swapper/210:42:582
1755840992724,2cyclictest0-21swapper/209:22:582
1755840992724,2cyclictest0-21swapper/208:50:132
175584099270,24cyclictest0-21swapper/207:24:552
4577091260,5ptp4l441ktimers/310:34:563
1755844992624,1cyclictest0-21swapper/312:33:593
1755840992623,2cyclictest0-21swapper/211:45:582
1755840992623,2cyclictest0-21swapper/211:45:582
1755840992623,2cyclictest0-21swapper/209:10:592
175584099260,24cyclictest0-21swapper/211:09:002
1755840992522,2cyclictest0-21swapper/212:13:582
1755840992522,2cyclictest0-21swapper/208:37:592
1755844992421,2cyclictest0-21swapper/310:50:593
1755840992422,1cyclictest0-21swapper/211:40:042
1755840992422,1cyclictest0-21swapper/211:29:592
1755840992422,1cyclictest0-21swapper/208:44:592
1755840992421,2cyclictest0-21swapper/209:00:592
1755840992421,2cyclictest0-21swapper/207:50:592
175584099240,1cyclictest0-21swapper/207:19:592
1755840992321,1cyclictest0-21swapper/210:20:002
1755840992321,1cyclictest0-21swapper/209:50:002
231999220,13rtkit-daemon495-21gpm07:08:430
1755840992220,1cyclictest0-21swapper/211:04:592
1755840992219,2cyclictest0-21swapper/207:38:592
1755840991917,1cyclictest0-21swapper/210:05:002
1755840991613,2cyclictest0-21swapper/211:21:002
1755840991613,2cyclictest0-21swapper/208:55:592
1755840991512,2cyclictest0-21swapper/209:35:142
1755840991311,1cyclictest0-21swapper/210:39:592
175584099119,1cyclictest0-21swapper/208:19:592
17558409941,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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