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2026-07-13 - 11:53
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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 Mon Jul 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
166648399148139,7cyclictest1759564-40logrotate00:00:000
166648399137126,8cyclictest1677532-21latency_hist19:45:010
166648499131126,4cyclictest1742427-21kworker/u8:0+events_unbound00:00:171
166648499126119,5cyclictest1668509-21kworker/u8:1+flush-179:019:30:001
166648499119113,4cyclictest1737009-21kworker/u8:1+events_unbound22:50:241
166648499117112,4cyclictest1729106-21kworker/u8:2+flush-179:022:30:001
166648499117105,10cyclictest1213033-21systemd-journal23:55:001
166648399115102,9cyclictest1693759-21latency_hist20:35:010
166648399112100,8cyclictest1770781-21latency_hist00:35:020
16664839910999,6cyclictest1668509-21kworker/u8:1+flush-179:020:00:000
166648399109100,6cyclictest1663393-21kworker/u8:3+events_unbound19:10:170
166648499108100,6cyclictest1721146-21kworker/u8:0+events_unbound22:35:001
16664839910696,7cyclictest1761207-21run-parts00:04:010
16664849910599,4cyclictest1680739-21kworker/u8:0+events_unbound20:05:171
16664849910596,7cyclictest1696998-21kworker/u8:3+events_unbound20:50:201
16664839910593,7cyclictest1686547-21kworker/u8:1+flush-179:020:40:170
16664839910389,10cyclictest1717952-21kworker/u8:1+flush-179:021:55:170
16664849910295,6cyclictest1679103-21kworker/u8:3+events_unbound19:50:241
16664849910197,3cyclictest1742826-21kworker/u8:1+events_unbound23:40:261
16664849910195,4cyclictest1762847-21kworker/u8:3+events_unbound00:10:231
16664839910093,4cyclictest1708139-21kworker/u8:3+flush-179:021:25:170
1666484999893,3cyclictest1704953-21kworker/u8:2+flush-179:021:25:221
1666484999890,5cyclictest1669563-21latency_hist19:20:011
1666483999889,6cyclictest1714519-21kworker/u8:3+events_unbound21:45:010
1666484999793,3cyclictest1704953-21kworker/u8:2+flush-179:021:50:241
1666484999792,4cyclictest1742427-21kworker/u8:0+events_unbound23:45:171
1666484999792,4cyclictest1742427-21kworker/u8:0+events_unbound23:45:161
1666484999590,4cyclictest1714519-21kworker/u8:3+events_unbound22:10:241
1666483999585,7cyclictest1762847-21kworker/u8:3+flush-179:000:10:180
1666483999582,10cyclictest1213033-21systemd-journal23:45:000
1666484999489,4cyclictest1700393-21kworker/u8:0+flush-179:021:10:261
1666484999489,4cyclictest1686547-21kworker/u8:1+flush-179:020:25:211
1666484999488,4cyclictest1721146-21kworker/u8:0+events_unbound22:05:151
1666484999387,4cyclictest1759535-21kworker/u8:2+events_unbound00:30:151
1666484999387,4cyclictest1686547-21kworker/u8:1+flush-179:020:30:141
1666484999286,4cyclictest1742427-21kworker/u8:0+flush-179:023:55:221
1666484999086,3cyclictest1686547-21kworker/u8:1+flush-179:020:45:281
1666484999085,4cyclictest1759535-21kworker/u8:2+events_unbound00:05:231
1666484999085,3cyclictest1734884-21kworker/u8:0+flush-179:022:40:261
1666484999085,3cyclictest1732224-21kworker/u8:3+flush-179:022:35:251
1666484999079,8cyclictest1716062-21latency_hist21:45:001
1666483999080,6cyclictest1704884-21kworker/u8:1+events_unbound21:10:000
1666484998884,3cyclictest1729106-21kworker/u8:2+events_unbound23:05:191
1666484998875,9cyclictest1700393-21kworker/u8:0+events_unbound21:00:011
1666483998881,4cyclictest1729106-21kworker/u8:2+flush-179:022:45:220
1666484998783,3cyclictest1692153-21kworker/u8:2+events_unbound20:40:241
1666484998779,6cyclictest1727731-21apt-get22:20:131
1666484998777,8cyclictest1711533-21apt-get21:30:121
1666483998681,3cyclictest1690353-21http20:25:010
1666483998678,5cyclictest1686547-21kworker/u8:1+flush-179:020:25:020
1666483998573,8cyclictest1686547-21kworker/u8:1+flush-179:020:15:230
1666483998572,9cyclictest1692153-21kworker/u8:2+flush-179:020:45:230
1666489998453,29cyclictest0-21swapper/319:27:593
1666484998478,4cyclictest1668509-21kworker/u8:1+flush-179:020:00:191
1666483998476,5cyclictest1752944-21latency_hist23:40:010
1666483998476,4cyclictest1742427-21kworker/u8:0+events_unbound23:45:150
1666483998476,4cyclictest1742427-21kworker/u8:0+events_unbound23:45:150
1666483998474,8cyclictest1685793-21apt-get20:10:130
1666484998378,3cyclictest1686547-21kworker/u8:1+events_unbound20:15:221
1666484998378,3cyclictest1674384-21kworker/u8:0+flush-179:019:40:191
1666483998372,8cyclictest1711670-21kworker/u8:0+flush-179:021:35:220
1666484998277,4cyclictest1742826-21kworker/u8:1+flush-179:023:20:251
1666484998277,4cyclictest1714519-21kworker/u8:3+events_unbound21:45:251
1666484998277,4cyclictest1669536-21kworker/u8:2+flush-179:019:20:241
1666484998176,4cyclictest1663393-21kworker/u8:3+flush-179:019:10:261
1666484998076,3cyclictest1704884-21kworker/u8:1+flush-179:021:15:201
1666484998075,4cyclictest1742427-21kworker/u8:0+events_unbound23:30:211
1666483998070,7cyclictest1748172-21latency_hist23:25:010
1666483997966,9cyclictest1721146-21kworker/u8:0+flush-179:022:10:180
1666484997874,3cyclictest1714519-21kworker/u8:3+events_unbound22:15:141
1666483997872,4cyclictest1742427-21kworker/u8:0+flush-179:023:30:270
1666483997870,5cyclictest1737009-21kworker/u8:1+flush-179:022:55:230
1666483997665,8cyclictest1213033-21systemd-journal21:14:590
1666484997571,3cyclictest1700393-21kworker/u8:0+flush-179:021:00:241
1666484997571,3cyclictest1669536-21kworker/u8:2+events_unbound20:10:281
1666484997570,4cyclictest1729106-21kworker/u8:2+flush-179:022:45:201
1666484997570,4cyclictest1704884-21kworker/u8:1+events_unbound21:20:221
1666484997570,3cyclictest1700393-21kworker/u8:0+events_unbound21:05:151
1666484997565,4cyclictest1759535-21kworker/u8:2+events_unbound00:25:261
1666484997470,3cyclictest1739140-21kworker/u8:0+events_unbound22:55:271
1666483997468,4cyclictest1759535-21kworker/u8:2+events_unbound00:20:010
1666484997368,4cyclictest1717952-21kworker/u8:1+events_unbound21:55:231
1666484997367,4cyclictest1669536-21kworker/u8:2+events_unbound19:35:211
1666483997264,5cyclictest1717952-21kworker/u8:1+flush-179:022:00:200
1666484997167,3cyclictest1711670-21kworker/u8:0+events_unbound21:35:241
1666484997065,4cyclictest1759535-21kworker/u8:2+flush-179:000:15:221
1666483997063,5cyclictest1711670-21kworker/u8:0+flush-179:021:30:240
1666483997059,7cyclictest1700393-21kworker/u8:0+events_unbound21:00:180
1666484996965,3cyclictest1687158-21kworker/u8:3+flush-179:020:20:151
1666484996965,3cyclictest1669536-21kworker/u8:2+events_unbound19:30:161
1666484996964,4cyclictest1669536-21kworker/u8:2+events_unbound19:49:571
1666483996964,3cyclictest1680709-21/usr/sbin/munin19:55:010
1666483996963,4cyclictest1721146-21kworker/u8:0+events_unbound22:25:120
1666484996863,4cyclictest1742826-21kworker/u8:1+flush-179:023:25:221
1666484996762,4cyclictest1742427-21kworker/u8:0+flush-179:023:15:241
1666484996758,4cyclictest1717952-21kworker/u8:1+events_unbound22:01:431
1666484996660,4cyclictest1742826-21kworker/u8:1+events_unbound23:35:191
1666483996658,6cyclictest1733831-21latency_hist22:40:000
1666483996658,5cyclictest1742826-21kworker/u8:1+flush-179:023:05:220
1666483996560,4cyclictest1686547-21kworker/u8:1+flush-179:020:35:270
1666483996558,5cyclictest1683913-21apt-get20:04:420
1666483996556,6cyclictest1721146-21kworker/u8:0+flush-179:022:05:220
1666483996551,7cyclictest1680739-21kworker/u8:0+events_unbound20:05:250
1666484996459,4cyclictest1686547-21kworker/u8:1+flush-179:020:39:561
4577091630,9ptp4l61490irq/134-eno1-TxRx-019:07:313
1666483996356,5cyclictest1669536-21kworker/u8:2+flush-179:019:45:230
1666483996356,5cyclictest1669536-21kworker/u8:2+flush-179:019:35:240
1666483996356,5cyclictest1213033-21systemd-journal19:35:000
1666483996258,3cyclictest1668509-21kworker/u8:1+flush-179:019:15:270
1666483996257,4cyclictest1742826-21kworker/u8:1+events_unbound23:25:140
1666483996255,5cyclictest1729106-21kworker/u8:2+flush-179:022:30:250
1666483996255,4cyclictest1708139-21kworker/u8:3+events_unbound21:25:010
1666483996154,5cyclictest1714519-21kworker/u8:3+flush-179:021:45:170
1666484995952,5cyclictest1767576-21kworker/u8:0+flush-179:000:25:001
1666484995949,7cyclictest1213033-21systemd-journal00:40:011
1666484995949,7cyclictest1213033-21systemd-journal00:40:011
1666486995854,2cyclictest0-21swapper/220:34:002
1666483995851,5cyclictest1727425-21kworker/u8:1+flush-179:022:20:230
1666483995849,6cyclictest1704953-21kworker/u8:2+flush-179:021:50:210
1666483995751,5cyclictest1737009-21kworker/u8:1+flush-179:022:50:210
1666483995749,6cyclictest1669831-21apt-get19:20:120
1666483995650,5cyclictest1769164-21kworker/u8:1+flush-179:000:35:160
1666483995650,5cyclictest1769164-21kworker/u8:1+flush-179:000:35:160
1666483995650,4cyclictest1762814-21latency_hist00:10:010
166648399560,53cyclictest1-21systemd20:55:010
1666483995552,2cyclictest0-21swapper/023:17:000
1666483995550,4cyclictest1671198-21kworker/u8:3+flush-179:019:25:210
1666483995549,4cyclictest1714519-21kworker/u8:3+flush-179:022:15:190
1666483995444,7cyclictest1213033-21systemd-journal00:30:000
1666483995350,2cyclictest1742427-21kworker/u8:0+events_unbound23:50:140
1666483995349,3cyclictest1704884-21kworker/u8:1+flush-179:021:15:280
1666483995347,5cyclictest1742826-21kworker/u8:1+flush-179:023:10:220
1666483995146,4cyclictest1700393-21kworker/u8:0+flush-179:020:55:270
1666484995046,3cyclictest1668509-21kworker/u8:1+events_unbound19:59:571
1666484994945,3cyclictest1742826-21kworker/u8:1+events_unbound23:11:451
1666483994641,4cyclictest1734884-21kworker/u8:0+flush-179:022:40:220
1666483994237,4cyclictest1729106-21kworker/u8:2+flush-179:023:00:230
1666489994139,1cyclictest0-21swapper/321:49:553
1666486994138,2cyclictest0-21swapper/220:16:592
166648699410,1cyclictest0-21swapper/220:59:592
1666484994132,6cyclictest1729106-21kworker/u8:2+flush-179:023:00:251
1666486994037,2cyclictest0-21swapper/223:11:582
1666489993936,2cyclictest0-21swapper/323:35:593
1666486993936,2cyclictest0-21swapper/223:17:592
166648699380,35cyclictest0-21swapper/221:19:542
1666489993735,1cyclictest0-21swapper/323:22:593
166648999370,36cyclictest0-21swapper/321:51:593
166648999370,36cyclictest0-21swapper/300:34:563
1666486993733,2cyclictest0-21swapper/222:34:002
166648699370,35cyclictest0-21swapper/222:17:002
166648699370,35cyclictest0-21swapper/220:06:592
166648699370,35cyclictest0-21swapper/219:38:592
231999360,27rtkit-daemon495784-21munin-node19:09:150
1666489993634,1cyclictest0-21swapper/323:31:003
1666489993634,1cyclictest0-21swapper/321:14:543
166648999360,35cyclictest0-21swapper/323:19:563
166648999360,35cyclictest0-21swapper/322:26:593
166648999360,35cyclictest0-21swapper/320:51:593
1666486993633,2cyclictest0-21swapper/219:44:002
166648699360,1cyclictest0-21swapper/223:37:002
166648699360,1cyclictest0-21swapper/219:50:592
1666489993533,1cyclictest0-21swapper/322:38:583
1666489993533,1cyclictest0-21swapper/322:21:593
1666489993533,1cyclictest0-21swapper/322:09:563
1666489993533,1cyclictest0-21swapper/319:43:593
166648999350,1cyclictest0-21swapper/322:55:593
1666486993532,2cyclictest0-21swapper/222:48:002
1666489993432,1cyclictest0-21swapper/321:37:593
1666486993431,2cyclictest0-21swapper/200:35:592
1666486993431,2cyclictest0-21swapper/200:35:592
1666489993331,1cyclictest0-21swapper/322:04:543
1666489993331,1cyclictest0-21swapper/321:29:563
1666486993331,1cyclictest0-21swapper/219:24:592
1666486993330,2cyclictest0-21swapper/221:57:592
1666486993330,2cyclictest0-21swapper/219:59:552
1666486993330,2cyclictest0-21swapper/219:10:592
1666483993327,5cyclictest1759535-21kworker/u8:2+events_unbound00:20:220
1666489993230,1cyclictest0-21swapper/320:56:583
1666489993230,1cyclictest0-21swapper/320:43:593
166648999320,31cyclictest1721091-21turbostat22:00:003
1666486993229,2cyclictest0-21swapper/220:22:592
1666489993129,1cyclictest0-21swapper/321:07:593
1666489993129,1cyclictest0-21swapper/320:19:553
1666489993128,2cyclictest0-21swapper/321:42:593
1666489993128,2cyclictest0-21swapper/320:07:593
1666486993128,2cyclictest0-21swapper/222:56:582
1666486993128,2cyclictest0-21swapper/222:39:592
4577091300,4ptp4l441ktimers/321:19:553
1666489993028,1cyclictest0-21swapper/320:10:593
1666489993027,2cyclictest0-21swapper/320:49:593
1666489993027,2cyclictest0-21swapper/319:15:133
166648999300,28cyclictest0-21swapper/323:50:123
166648999300,28cyclictest0-21swapper/322:50:123
1666486993027,2cyclictest0-21swapper/220:25:022
1666486993027,2cyclictest0-21swapper/200:08:002
1666486993026,2cyclictest0-21swapper/219:26:592
4577091290,6ptp4l441ktimers/322:20:003
4577091290,6ptp4l441ktimers/319:35:003
1666489992927,1cyclictest0-21swapper/320:30:143
1666489992927,1cyclictest0-21swapper/320:25:033
1666489992927,1cyclictest0-21swapper/319:50:143
166648999290,28cyclictest0-21swapper/322:40:133
166648999290,28cyclictest0-21swapper/300:35:143
166648999290,28cyclictest0-21swapper/300:35:143
1666486992926,2cyclictest0-21swapper/223:54:002
1666486992926,2cyclictest0-21swapper/222:25:112
1666486992926,2cyclictest0-21swapper/222:23:582
1666486992926,2cyclictest0-21swapper/222:00:122
1666486992926,2cyclictest0-21swapper/221:30:132
1666486992926,2cyclictest0-21swapper/220:01:592
1666486992926,2cyclictest0-21swapper/200:10:142
166648699290,28cyclictest0-21swapper/221:25:142
166648699290,27cyclictest0-21swapper/220:50:132
166648699290,27cyclictest0-21swapper/220:45:142
166648699290,27cyclictest0-21swapper/200:20:142
4577091280,6ptp4l441ktimers/321:05:013
4577091280,6ptp4l441ktimers/300:25:003
1666489992826,1cyclictest0-21swapper/300:27:583
1666489992825,2cyclictest0-21swapper/323:45:143
1666489992825,2cyclictest0-21swapper/323:45:133
1666489992825,2cyclictest0-21swapper/323:05:123
1666489992825,2cyclictest0-21swapper/300:01:003
166648999280,2cyclictest0-21swapper/322:45:133
166648999280,27cyclictest1732239-21turbostat22:35:003
166648999280,26cyclictest0-21swapper/320:00:113
166648999280,1cyclictest0-21swapper/320:35:133
1666486992825,2cyclictest0-21swapper/223:24:002
1666486992825,2cyclictest0-21swapper/221:35:132
1666486992825,2cyclictest0-21swapper/220:38:592
1666486992825,2cyclictest0-21swapper/200:25:132
166648699280,21cyclictest0-21swapper/223:48:592
166648699280,21cyclictest0-21swapper/223:48:592
4577091270,6ptp4l61490irq/134-eno1-TxRx-021:35:013
4577091270,6ptp4l61490irq/134-eno1-TxRx-000:00:003
4577091270,5ptp4l441ktimers/300:20:013
1666489992725,1cyclictest0-21swapper/323:00:143
1666489992720,5cyclictest1725885-21turbostat22:15:003
1666486992724,2cyclictest0-21swapper/222:11:592
1666486992724,2cyclictest0-21swapper/219:33:592
4577091260,6ptp4l61490irq/134-eno1-TxRx-023:45:003
4577091260,6ptp4l61490irq/134-eno1-TxRx-020:00:003
4577091260,5ptp4l441ktimers/320:25:003
4577091260,5ptp4l441ktimers/319:25:003
4577091260,5ptp4l441ktimers/300:15:013
4577091260,5ptp4l441ktimers/300:10:013
4577091260,4ptp4l61490irq/134-eno1-TxRx-023:15:003
1666489992623,2cyclictest0-21swapper/321:24:563
1666486992624,1cyclictest0-21swapper/200:19:592
1666486992623,2cyclictest0-21swapper/222:40:582
1666486992623,2cyclictest0-21swapper/221:43:592
1666486992623,2cyclictest0-21swapper/221:00:582
1666486992622,2cyclictest0-21swapper/223:43:582
1666486992622,2cyclictest0-21swapper/222:08:582
166648699260,1cyclictest0-21swapper/220:14:592
4577091250,5ptp4l61490irq/134-eno1-TxRx-023:29:563
4577091250,5ptp4l441ktimers/319:49:563
1666489992523,1cyclictest0-21swapper/319:13:593
166648999250,2cyclictest0-21swapper/319:38:003
1666486992522,2cyclictest0-21swapper/223:31:592
1666486992522,2cyclictest0-21swapper/223:25:582
166648699250,23cyclictest0-21swapper/223:59:582
1666486992421,2cyclictest0-21swapper/223:08:002
1666486992320,2cyclictest0-21swapper/221:22:592
166648499213,9cyclictest29-21ksoftirqd/119:10:011
1666486992017,2cyclictest0-21swapper/221:09:552
1666486991917,1cyclictest0-21swapper/200:31:592
1666486991916,2cyclictest0-21swapper/221:53:582
1666486991916,2cyclictest0-21swapper/219:15:592
1666486991614,1cyclictest0-21swapper/221:15:002
1666486991513,1cyclictest0-21swapper/200:01:592
1666486991310,2cyclictest0-21swapper/222:50:132
166648699119,1cyclictest0-21swapper/220:44:592
16664869986,1cyclictest0-21swapper/219:45:122
16664869985,2cyclictest0-21swapper/221:45:262
16664869974,2cyclictest0-21swapper/223:00:592
16664869930,2cyclictest0-21swapper/219:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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