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2026-08-30 - 09:48
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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 Sun Aug 30, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
185939299149137,9cyclictest1962024-21latency_hist00:25:010
185939399142129,9cyclictest1911061-21latency_hist21:50:001
185939299134122,9cyclictest1930680-21latency_hist22:50:010
18593939912695,20cyclictest1896482-21latency_hist21:05:011
185939399125114,7cyclictest1906286-21latency_hist21:35:011
185939399123109,11cyclictest1899662-21apt-get21:15:001
185939299122114,4cyclictest1864115-21kworker/u8:2+flush-179:019:40:240
185939299122104,15cyclictest1957246-21latency_hist00:10:010
185939299116108,5cyclictest1904743-21kworker/u8:2+flush-179:022:15:250
18593939910899,7cyclictest1870762-21latency_hist19:45:011
18593939910898,7cyclictest1865980-21latency_hist19:30:011
18593939910792,12cyclictest1953770-40mandb00:00:011
18593939910596,6cyclictest1927303-21kworker/u8:2+flush-179:022:55:021
18593939910596,6cyclictest1927303-21kworker/u8:2+flush-179:022:55:021
18593929910394,6cyclictest1906542-21apt-get21:35:120
18593929910295,5cyclictest1893271-21kworker/u8:0+flush-179:021:05:260
1859393999886,9cyclictest1886914-21kworker/u8:3+flush-179:020:45:001
1859392999791,4cyclictest1948947-21kworker/u8:3+flush-179:000:00:140
1859392999784,10cyclictest1953742-21apt-get00:00:000
1859393999685,9cyclictest1959087-21apt-get00:15:131
1859393999684,9cyclictest1893271-21kworker/u8:0+flush-179:021:00:001
1859393999589,4cyclictest1914470-21kworker/u8:3+flush-179:022:05:251
1859392999488,3cyclictest1883796-21apt-key20:25:010
1859392999485,5cyclictest1879766-21kworker/u8:2+flush-179:020:25:020
1859392999484,7cyclictest1934910-21kworker/u8:0+flush-179:023:30:150
1859393999383,7cyclictest1883500-21apt-get20:25:001
1859393999375,15cyclictest1213033-21systemd-journal20:33:061
1859392999383,8cyclictest1948947-21kworker/u8:3+flush-179:000:10:220
1859393999286,5cyclictest1934910-21kworker/u8:0+flush-179:023:30:221
1859393999282,7cyclictest1213033-21systemd-journal21:40:011
1859393999186,3cyclictest1948947-21kworker/u8:3+flush-179:023:50:161
1859393998880,5cyclictest1924032-21kworker/u8:1+events_unbound22:40:011
1859392998879,6cyclictest1877670-21diskstats20:05:150
1859392998776,8cyclictest1886923-21latency_hist20:35:010
1859393998675,9cyclictest1954291-21apt-get00:00:131
1859392998680,4cyclictest1948947-21kworker/u8:3+flush-179:023:45:240
1859392998679,5cyclictest1883544-21kworker/u8:0+flush-179:020:40:210
1859392998678,5cyclictest1902207-21kworker/u8:1+flush-179:021:30:160
1859392998677,7cyclictest1921546-21kworker/u8:0+flush-179:022:25:250
1859392998676,4cyclictest1927303-21kworker/u8:2+events_unbound22:50:140
1859392998579,4cyclictest1921546-21kworker/u8:0+flush-179:022:20:230
1859392998577,6cyclictest1864147-21apt-get19:25:010
1859392998575,8cyclictest1213033-21systemd-journal19:20:010
1859392998575,7cyclictest1965205-21latency_hist00:35:010
1859393998475,6cyclictest1856350-21kworker/u8:0+events_unbound19:10:231
1859392998473,9cyclictest1901781-21apt-get21:20:120
1859392998466,16cyclictest1917688-21latency_hist22:10:000
1859393998376,5cyclictest1900173-21apt-get21:15:111
1859392998377,5cyclictest1886914-21kworker/u8:3+flush-179:020:35:200
1859393998275,4cyclictest1904743-21kworker/u8:2+flush-179:021:55:261
1859393998273,7cyclictest1213033-21systemd-journal21:07:061
1859393998174,5cyclictest1927303-21kworker/u8:2+flush-179:023:00:141
1859393998073,5cyclictest1922726-21apt-get22:25:121
1859393998070,7cyclictest1909478-21latency_hist21:45:011
1859392997970,7cyclictest1914470-21kworker/u8:3+events_unbound22:10:220
1859392997969,7cyclictest1936782-21diskstats23:05:150
1859393997870,6cyclictest1878967-21apt-get20:10:111
1859392997872,4cyclictest1904743-21kworker/u8:2+flush-179:022:00:020
1859393997767,7cyclictest1921546-21kworker/u8:0+flush-179:022:30:191
1859393997755,19cyclictest1929760-21kworker/u8:0+flush-179:022:50:191
1859393997752,22cyclictest1867567-21latency_hist19:35:011
1859393997668,6cyclictest1944235-21kworker/u8:2+flush-179:023:40:001
1859392997670,4cyclictest1948947-21kworker/u8:3+flush-179:023:50:140
1859393997567,6cyclictest1871018-21apt-get19:45:121
1859393997566,7cyclictest1948969-21latency_hist23:45:021
1859393997565,7cyclictest1875546-21latency_hist20:00:011
1859393997565,7cyclictest1870739-21kworker/u8:3+flush-179:019:50:141
1859392997562,10cyclictest1213033-21systemd-journal23:39:110
1859392997465,7cyclictest1893271-21kworker/u8:0+flush-179:021:20:000
1859392997463,8cyclictest1912647-21latency_hist21:55:000
1859392997462,9cyclictest1213033-21systemd-journal19:25:010
1859393997367,4cyclictest1934910-21kworker/u8:0+flush-179:023:15:251
1859392997367,4cyclictest1864115-21kworker/u8:2+flush-179:019:30:180
1859392997366,5cyclictest1934910-21kworker/u8:0+flush-179:023:20:200
185939299730,71cyclictest1891703-21dump-pmu-power20:50:000
1859393997263,4cyclictest1893271-21kworker/u8:0+flush-179:021:20:221
1859393997262,8cyclictest1930694-21apt-get22:49:591
1859392997265,5cyclictest1904743-21kworker/u8:2+events_unbound21:40:250
1859392997259,11cyclictest1213033-21systemd-journal00:20:000
1859393997165,4cyclictest1904743-21kworker/u8:2+events_unbound22:00:241
1859393997160,7cyclictest1213033-21systemd-journal00:10:131
1859393997159,7cyclictest1879766-21kworker/u8:2+flush-179:020:45:211
1859392997166,4cyclictest1864115-21kworker/u8:2+flush-179:019:45:260
1859393997064,4cyclictest1914470-21kworker/u8:3+flush-179:022:20:001
1859392997064,5cyclictest1924032-21kworker/u8:1+events_unbound22:35:230
1859392996962,5cyclictest1893271-21kworker/u8:0+flush-179:020:55:200
1859392996961,5cyclictest1859365-21kworker/u8:1+events_unbound20:00:130
1859393996864,3cyclictest1873965-21kworker/u8:0+flush-179:020:09:061
1859393996861,5cyclictest1862557-21latency_hist19:20:021
1859392996860,6cyclictest1965183-21kworker/u8:1+events_unbound00:40:010
1859393996760,5cyclictest1856350-21kworker/u8:0+events_unbound19:25:001
1859393996753,11cyclictest1213033-21systemd-journal20:54:071
1859392996755,9cyclictest1213033-21systemd-journal23:15:010
1859393996657,7cyclictest1953794-21kworker/u8:2+flush-179:000:25:201
1859393996657,7cyclictest1936274-21kworker/u8:3+events_unbound23:20:241
1859393996452,10cyclictest1912656-21apt-get21:55:011
1859397996357,4cyclictest1891718-21turbostat20:50:003
1859397996255,5cyclictest1919276-21turbostat22:15:013
185939399620,1cyclictest0-21swapper/120:03:591
1859392996257,4cyclictest1856350-21kworker/u8:0+flush-179:019:10:150
1859392996255,5cyclictest1924032-21kworker/u8:1+events_unbound22:40:150
1859392996254,5cyclictest1873965-21kworker/u8:0+events_unbound20:10:240
1859392996249,10cyclictest1947640-21apt-get23:40:110
1859392996152,6cyclictest1927303-21kworker/u8:2+events_unbound22:55:210
1859392996152,6cyclictest1927303-21kworker/u8:2+events_unbound22:55:200
1859392996149,9cyclictest1941007-21latency_hist23:20:020
1859392996053,5cyclictest1921546-21kworker/u8:0+flush-179:022:30:220
1859392996052,6cyclictest1903100-21kworker/u8:3+events_unbound21:45:220
1859392996047,11cyclictest1213033-21systemd-journal21:04:590
1859393995951,6cyclictest1921546-21kworker/u8:0+flush-179:022:20:251
1859392995953,4cyclictest1934910-21kworker/u8:0+flush-179:023:25:220
1859392995952,5cyclictest1903100-21kworker/u8:3+flush-179:021:25:220
1859393995852,4cyclictest1960401-21kworker/u8:0+flush-179:000:30:171
1859393995850,5cyclictest1856350-21kworker/u8:0+events_unbound19:10:011
1859393995849,7cyclictest1859365-21kworker/u8:1+flush-179:020:15:161
1859393995848,7cyclictest1904698-21latency_hist21:30:001
1859393995750,5cyclictest1934910-21kworker/u8:0+events_unbound23:15:011
1859392995749,6cyclictest1932505-21kworker/u8:1+flush-179:023:05:010
1859394995653,2cyclictest0-21swapper/220:25:592
1859393995650,4cyclictest1960695-21apt-get00:20:101
1859392995635,6cyclictest1893271-21kworker/u8:0+events_unbound20:55:010
1859393995547,6cyclictest1864115-21kworker/u8:2+flush-179:019:35:191
1859392995549,5cyclictest1859365-21kworker/u8:1+events_unbound19:55:130
1859392995548,5cyclictest1859365-21kworker/u8:1+flush-179:020:15:220
4577091530,14ptp4l61490irq/134-eno1-TxRx-019:10:013
1859393995347,4cyclictest1886914-21kworker/u8:3+flush-179:020:35:121
1859392995240,10cyclictest1898610-21diskstats21:10:160
1859393994944,4cyclictest1924032-21kworker/u8:1+flush-179:022:40:261
1859393994937,10cyclictest1213033-21systemd-journal20:30:011
1859392994643,2cyclictest1873965-21kworker/u8:0+flush-179:019:55:000
1859393994540,4cyclictest1914470-21kworker/u8:3+flush-179:022:10:241
4577091440,4ptp4l441ktimers/320:04:563
1859393994431,12cyclictest1950561-21munin-run23:50:001
1859393994431,11cyclictest1934910-21kworker/u8:0+events_unbound23:25:151
1859393994430,12cyclictest1960401-21kworker/u8:0+flush-179:000:35:231
1859397994238,3cyclictest0-21swapper/300:26:593
185939799420,41cyclictest0-21swapper/323:44:583
1859394994239,2cyclictest0-21swapper/223:56:592
185939299420,39cyclictest1963616-21cron00:30:000
1859397994134,5cyclictest1958841-21turbostat00:15:003
1859397994133,7cyclictest0-21swapper/322:28:583
185939799410,39cyclictest1939415-21turbostat23:14:593
1859393994020,18cyclictest0-21swapper/100:05:241
4577091390,28ptp4l441ktimers/320:25:033
185939799390,38cyclictest1864143-21turbostat19:25:003
1859392993933,5cyclictest1864115-21kworker/u8:2+events_unbound19:35:130
1859394993835,2cyclictest0-21swapper/220:03:592
185939499380,36cyclictest0-21swapper/222:15:592
1859393993829,7cyclictest1936496-21apt-get23:05:121
1859397993734,2cyclictest0-21swapper/319:51:593
1859397993734,2cyclictest0-21swapper/300:32:583
185939799370,36cyclictest0-21swapper/322:49:553
185939799370,36cyclictest0-21swapper/320:44:553
1859394993734,2cyclictest0-21swapper/223:31:582
1859394993734,2cyclictest0-21swapper/219:38:592
185939499370,2cyclictest0-21swapper/223:54:002
4577091360,3ptp4l441ktimers/321:20:133
4577091360,28ptp4l441ktimers/321:55:143
1859397993634,1cyclictest0-21swapper/300:04:593
185939799360,27cyclictest0-21swapper/320:30:133
1859392993630,4cyclictest1213033-21systemd-journal22:05:000
1859397993533,1cyclictest0-21swapper/323:38:593
1859397993530,4cyclictest1878720-21turbostat20:10:013
1859394993532,2cyclictest0-21swapper/222:00:592
1859394993532,2cyclictest0-21swapper/221:36:002
1859394993532,2cyclictest0-21swapper/220:43:592
1859394993532,2cyclictest0-21swapper/200:34:552
1859394993532,2cyclictest0-21swapper/200:26:002
1859397993432,1cyclictest0-21swapper/323:29:583
1859397993432,1cyclictest0-21swapper/321:52:593
1859397993431,2cyclictest0-21swapper/319:37:593
1859397993427,5cyclictest1898082-21turbostat21:10:013
1859394993432,1cyclictest0-21swapper/220:31:592
1859394993431,2cyclictest0-21swapper/221:02:592
185939499340,2cyclictest0-21swapper/220:37:592
231999330,10rtkit-daemon2304-21lightdm-gtk-gre19:08:540
1859397993331,1cyclictest0-21swapper/323:56:593
1859397993330,2cyclictest0-21swapper/322:43:583
185939799330,23cyclictest0-21swapper/319:30:153
1859394993330,2cyclictest0-21swapper/220:55:592
1859397993230,1cyclictest0-21swapper/323:50:003
1859397993229,2cyclictest0-21swapper/300:21:003
1859394993229,2cyclictest0-21swapper/222:49:592
4577091310,7ptp4l441ktimers/319:30:003
1859397993129,1cyclictest0-21swapper/322:53:593
1859394993129,1cyclictest0-21swapper/222:55:002
1859394993129,1cyclictest0-21swapper/219:30:002
1859394993128,2cyclictest0-21swapper/220:20:122
185939499310,29cyclictest0-21swapper/219:46:592
1859397993028,1cyclictest0-21swapper/320:37:003
185939799300,28cyclictest0-21swapper/322:00:133
185939799300,26cyclictest0-21swapper/323:00:023
1859394993027,2cyclictest0-21swapper/220:05:132
185939499300,2cyclictest0-21swapper/220:50:122
185939499300,28cyclictest0-21swapper/223:20:142
185939499300,28cyclictest0-21swapper/221:55:022
185939499300,28cyclictest0-21swapper/200:00:032
185939499300,27cyclictest0-21swapper/221:22:592
4577091290,6ptp4l441ktimers/319:50:003
4577091290,5ptp4l441ktimers/323:00:013
4577091290,5ptp4l441ktimers/323:00:003
4577091290,5ptp4l441ktimers/322:35:013
1859397992927,1cyclictest0-21swapper/321:00:123
1859397992925,2cyclictest0-21swapper/300:05:143
1859397992923,5cyclictest1904710-21turbostat21:30:003
185939799290,28cyclictest0-21swapper/321:15:023
185939799290,28cyclictest0-21swapper/300:35:133
1859394992926,2cyclictest0-21swapper/223:00:012
1859394992926,2cyclictest0-21swapper/223:00:012
1859394992926,2cyclictest0-21swapper/222:30:122
185939499290,28cyclictest0-21swapper/200:20:122
185939499290,27cyclictest0-21swapper/221:25:132
185939499290,26cyclictest0-21swapper/200:19:552
4577091280,5ptp4l441ktimers/321:45:003
4577091280,4ptp4l441ktimers/322:10:003
4577091280,4ptp4l441ktimers/321:50:013
4577091280,4ptp4l441ktimers/319:45:013
1859397992826,1cyclictest0-21swapper/322:15:143
1859397992826,1cyclictest0-21swapper/319:15:593
1859397992825,2cyclictest0-21swapper/323:50:113
185939799280,1cyclictest0-21swapper/320:55:113
1859394992825,2cyclictest0-21swapper/222:05:142
1859394992825,2cyclictest0-21swapper/221:15:022
1859394992825,2cyclictest0-21swapper/219:30:142
185939499280,2cyclictest0-21swapper/219:55:122
185939499280,27cyclictest0-21swapper/221:15:022
185939499280,26cyclictest0-21swapper/221:05:132
185939499280,25cyclictest0-21swapper/223:20:002
4577091270,5ptp4l441ktimers/321:39:563
4577091270,4ptp4l441ktimers/323:35:003
4577091270,4ptp4l441ktimers/323:10:003
4577091270,4ptp4l441ktimers/321:34:563
4577091270,4ptp4l441ktimers/320:24:553
1859397992726,1cyclictest0-21swapper/319:13:593
1859397992725,1cyclictest0-21swapper/321:12:593
185939799270,26cyclictest0-21swapper/322:35:593
1859394992724,2cyclictest0-21swapper/223:40:592
1859394992724,2cyclictest0-21swapper/200:05:132
4577091260,5ptp4l441ktimers/320:20:003
4577091260,4ptp4l441ktimers/322:24:553
4577091260,4ptp4l441ktimers/320:14:563
4577091260,4ptp4l441ktimers/300:19:563
1859397992623,2cyclictest0-21swapper/319:57:593
1859394992623,2cyclictest0-21swapper/223:11:592
185939499260,24cyclictest0-21swapper/222:40:592
185939499260,24cyclictest0-21swapper/221:54:002
185939499260,24cyclictest0-21swapper/220:10:592
4577091250,4ptp4l61490irq/134-eno1-TxRx-023:24:553
4577091250,4ptp4l61490irq/134-eno1-TxRx-020:55:013
1859397992518,1cyclictest0-21swapper/323:18:593
1859394992523,1cyclictest0-21swapper/200:37:592
1859394992522,2cyclictest351rcuc/223:40:012
1859394992522,2cyclictest0-21swapper/221:49:552
1859394992522,2cyclictest0-21swapper/220:48:592
1859394992522,2cyclictest0-21swapper/219:52:592
185939499250,2cyclictest0-21swapper/223:48:592
185939499250,24cyclictest0-21swapper/220:17:592
1859394992421,2cyclictest0-21swapper/223:07:002
1859394992421,2cyclictest0-21swapper/219:43:592
185939499240,1cyclictest0-21swapper/222:40:002
1859394992321,1cyclictest0-21swapper/222:25:002
1859394992219,2cyclictest0-21swapper/200:10:112
1859394992118,2cyclictest0-21swapper/223:00:022
1859394992018,1cyclictest0-21swapper/222:29:592
1859394991917,1cyclictest0-21swapper/219:15:592
1859394991816,1cyclictest0-21swapper/223:30:002
1859394991815,2cyclictest351rcuc/221:34:562
1859394991815,2cyclictest351rcuc/219:24:552
1859394991714,2cyclictest351rcuc/222:14:542
1859394991613,2cyclictest0-21swapper/221:43:582
185939499129,2cyclictest0-21swapper/219:12:002
18593949930,2cyclictest0-21swapper/219:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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