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2026-03-28 - 07:46
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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 Sat Mar 28, 2026 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18457149910390,10cyclictest266-21systemd-journal22:00:010
1845716999889,7cyclictest1908725-21latency_hist22:25:011
1845716999588,5cyclictest1939271-21kworker/u8:2+flush-179:000:00:011
1845716999283,7cyclictest1902106-21latency_hist22:05:001
1845716998982,5cyclictest1855175-21latency_hist19:40:021
1845714998879,6cyclictest1937616-21latency_hist23:55:010
1845716998274,6cyclictest1850416-21latency_hist19:25:011
1845716998273,7cyclictest1902079-21kworker/u8:1+flush-179:022:20:011
1845714997870,5cyclictest1945904-21latency_hist00:20:010
1845714997870,5cyclictest1945904-21latency_hist00:20:010
1845716997670,5cyclictest1939271-21kworker/u8:2+events_unbound00:04:001
1845716997568,5cyclictest1895743-21latency_hist21:45:001
1845716997367,4cyclictest1939271-21kworker/u8:2+flush-179:000:10:231
1845716997364,7cyclictest1897327-21latency_hist21:50:021
1845716997264,6cyclictest1868182-21latency_hist20:20:011
1845716997061,7cyclictest1946151-21/usr/sbin/munin00:20:231
1845716996964,3cyclictest1829297-21kworker/u8:4+flush-179:019:50:231
1845716996963,4cyclictest1871423-21kworker/u8:2+flush-179:021:30:251
1845716996958,9cyclictest266-21systemd-journal20:59:591
1845714996959,7cyclictest266-21systemd-journal20:40:010
1845716996761,4cyclictest1917814-21kworker/u8:0+flush-179:022:55:251
1845714996757,8cyclictest266-21systemd-journal00:04:000
1845716996459,4cyclictest1871423-21kworker/u8:2+flush-179:020:35:001
1845716996458,4cyclictest1829297-21kworker/u8:4+events_unbound20:05:011
1845716996458,4cyclictest1829297-21kworker/u8:4+events_unbound20:05:001
1845716996457,5cyclictest1886227-21kworker/u8:1+flush-179:021:35:201
1845716996455,7cyclictest1911891-21kworker/u8:1+flush-179:022:35:001
1845714996448,14cyclictest1915074-21kworker/u8:2+flush-179:022:50:000
1845716996356,4cyclictest1876370-21kworker/u8:0+flush-179:021:05:011
1845716996254,5cyclictest1829297-21kworker/u8:4+events_unbound19:15:191
1845716996254,4cyclictest1876370-21kworker/u8:0+flush-179:020:50:241
1845714996154,5cyclictest1921717-21latency_hist23:05:010
1845714996038,20cyclictest1886183-21latency_hist21:15:010
1845714996038,20cyclictest1886183-21latency_hist21:15:000
1845716995951,6cyclictest1902079-21kworker/u8:1+flush-179:022:05:221
1845716995948,8cyclictest266-21systemd-journal22:45:001
1845716995948,8cyclictest266-21systemd-journal22:45:001
1845714995940,17cyclictest1949086-21latency_hist00:30:010
1845714995647,7cyclictest1883252-21/usr/sbin/munin21:05:240
1845716995548,5cyclictest1845646-21kworker/u8:0+flush-179:019:10:211
1845714995545,8cyclictest1939244-40mandb00:00:020
1845716995450,3cyclictest1876370-21kworker/u8:0+flush-179:020:49:561
1845716995449,3cyclictest1892585-21kworker/u8:3+flush-179:021:55:201
1845716995448,4cyclictest1911891-21kworker/u8:1+flush-179:022:35:151
1845716995447,5cyclictest1862464-21kworker/u8:0+flush-179:020:34:561
1845716995447,5cyclictest1853567-21kworker/u8:0+flush-179:019:40:211
1845716995440,13cyclictest1929648-21kworker/u8:1+flush-179:023:40:271
1845714995446,7cyclictest1871423-21kworker/u8:2+flush-179:021:20:000
1845714995445,7cyclictest1903689-21latency_hist22:10:010
1845716995346,5cyclictest1876370-21kworker/u8:0+flush-179:021:25:211
1845716995344,7cyclictest1917191-21apt-get22:50:141
1845714995344,7cyclictest1850654-21/usr/sbin/munin19:25:230
4577091510,13ptp4l61490irq/134-eno1-TxRx-019:10:013
1845716995144,4cyclictest1829297-21kworker/u8:4+flush-179:019:45:171
1845716995137,10cyclictest1942453-21latency_hist00:10:011
1845714995144,5cyclictest1936031-21latency_hist23:50:010
1845716995045,4cyclictest1931512-21apt-get23:35:121
1845716995045,4cyclictest1892585-21kworker/u8:3+events_unbound22:10:241
1845714994938,9cyclictest1858620-21apt-get19:50:120
1845716994842,5cyclictest1925665-21kworker/u8:1+flush-179:023:20:211
1845716994842,5cyclictest1915074-21kworker/u8:2+flush-179:022:45:201
1845716994842,4cyclictest1892585-21kworker/u8:3+flush-179:021:50:251
1845714994845,2cyclictest1950664-21kworker/u8:1+events_unbound00:35:000
1845714994837,9cyclictest1865243-21apt-get20:10:110
1845716994742,4cyclictest1929648-21kworker/u8:1+flush-179:023:50:171
1845716994738,7cyclictest1892585-21kworker/u8:3+events_unbound22:25:171
1845714994741,5cyclictest1892585-21kworker/u8:3+flush-179:021:55:010
1845714994739,5cyclictest1931257-21latency_hist23:35:010
1845716994640,4cyclictest484-21dbus-daemon19:30:001
1845714994640,4cyclictest1944299-21latency_hist00:15:010
1845714994637,7cyclictest1872938-21latency_hist20:35:010
1845716994536,6cyclictest1917814-21kworker/u8:0+flush-179:023:15:011
1845716994536,6cyclictest1917814-21kworker/u8:0+flush-179:023:15:011
1845716994533,9cyclictest510-21rs:main1
1845716994533,9cyclictest510-21rs:main1
1845714994538,5cyclictest1894154-21latency_hist21:40:010
1845716994440,3cyclictest1829297-21kworker/u8:4+flush-179:019:34:561
1845716994439,4cyclictest1847882-21kworker/u8:1+flush-179:020:09:551
1845714994435,7cyclictest266-21systemd-journal23:40:000
184571499440,42cyclictest714-21Xorg00:38:590
1845720994338,2cyclictest0-21swapper/200:31:592
184572099422,1cyclictest0-21swapper/221:31:592
1845716994238,2cyclictest714-21Xorg19:58:591
1845716994233,7cyclictest510-21rs:main1
184571699421,39cyclictest714-21Xorg00:17:591
184571699421,39cyclictest714-21Xorg00:17:591
1845714994234,7cyclictest1911891-21kworker/u8:1+flush-179:022:40:000
184571499420,41cyclictest1915102-21cron22:45:010
184571499420,41cyclictest1915102-21cron22:45:000
184572499410,40cyclictest0-21swapper/323:54:553
1845716994134,5cyclictest1868731-21kworker/u8:1+flush-179:020:25:011
1845716994131,8cyclictest1929927-21apt-get23:30:121
1845714994139,2cyclictest0-21swapper/020:16:590
1845714994138,2cyclictest0-21swapper/021:29:590
1845714994137,3cyclictest1911937-21systemd-run22:35:000
1845714994132,7cyclictest1871423-21kworker/u8:2+flush-179:020:45:230
1845724994037,2cyclictest0-21swapper/300:31:583
1845724994035,4cyclictest1944316-21turbostat00:15:003
1845716994035,4cyclictest1939271-21kworker/u8:2+events_unbound00:25:241
1845716994035,4cyclictest1886227-21kworker/u8:1+flush-179:021:20:141
1845716994035,3cyclictest1929648-21kworker/u8:1+flush-179:023:45:241
1845714994032,5cyclictest1847882-21kworker/u8:1+flush-179:019:55:180
184571499401,37cyclictest714-21Xorg20:52:590
184571499400,38cyclictest714-21Xorg22:13:000
1845720993935,2cyclictest0-21swapper/200:22:592
184572099390,36cyclictest0-21swapper/221:44:552
184572099390,36cyclictest0-21swapper/221:09:582
184572099390,2cyclictest0-21swapper/223:04:552
1845716993934,3cyclictest1866609-21systemd-run20:15:001
1845714993935,3cyclictest1855232-21systemd-run19:40:010
1845714993935,2cyclictest714-21Xorg23:18:590
1845714993932,5cyclictest1907124-21latency_hist22:20:010
184572499380,1cyclictest0-21swapper/320:19:593
1845720993834,2cyclictest0-21swapper/219:46:592
184572099380,35cyclictest0-21swapper/223:06:592
184572099380,35cyclictest0-21swapper/221:59:592
1845716993836,1cyclictest0-21swapper/123:19:561
1845716993828,6cyclictest0-21swapper/100:35:591
1845714993834,3cyclictest1928120-21systemd-run23:25:000
184571499380,2cyclictest714-21Xorg23:09:590
184571499380,1cyclictest0-21swapper/021:41:590
1845724993734,2cyclictest0-21swapper/319:23:593
1845724993734,2cyclictest0-21swapper/319:19:563
1845720993733,2cyclictest0-21swapper/221:50:582
184572099370,35cyclictest0-21swapper/223:10:592
184572099370,35cyclictest0-21swapper/223:10:592
184572099370,35cyclictest0-21swapper/220:41:592
184572099370,35cyclictest0-21swapper/219:44:592
184572099370,35cyclictest0-21swapper/200:15:002
1845714993726,9cyclictest1895999-21apt-get21:45:110
184571499371,34cyclictest908065-21snmpd22:50:140
1845724993634,2cyclictest0-21swapper/320:14:553
1845724993634,1cyclictest0-21swapper/320:07:593
1845724993633,2cyclictest0-21swapper/322:49:593
184572499360,35cyclictest0-21swapper/319:44:593
184572499360,29cyclictest0-21swapper/321:44:543
184572499360,1cyclictest0-21swapper/323:06:593
184572499360,1cyclictest0-21swapper/322:00:003
184572499360,1cyclictest0-21swapper/319:28:593
1845720993634,1cyclictest0-21swapper/222:19:592
1845720993633,2cyclictest0-21swapper/223:34:592
184572099360,1cyclictest0-21swapper/220:49:552
184572099360,1cyclictest0-21swapper/200:02:592
1845716993631,4cyclictest1871423-21kworker/u8:2+events_unbound21:15:441
1845714993628,6cyclictest1887789-21turbostat21:24:550
1845724993533,1cyclictest0-21swapper/300:22:593
1845724993532,2cyclictest0-21swapper/321:50:593
184572499350,34cyclictest0-21swapper/320:41:583
184572499350,1cyclictest0-21swapper/323:10:593
184572499350,1cyclictest0-21swapper/323:10:593
184572499350,1cyclictest0-21swapper/323:04:553
1845720993532,2cyclictest0-21swapper/222:07:592
184572099350,1cyclictest0-21swapper/220:20:002
184572099350,1cyclictest0-21swapper/200:15:592
184572099350,1cyclictest0-21swapper/200:15:592
1845716993531,3cyclictest1929709-21systemd-run23:30:011
1845716993530,3cyclictest714-21Xorg23:04:591
184571499351,30cyclictest1891219-21apt-get21:30:130
4577091340,12ptp4l441ktimers/320:30:023
4577091340,12ptp4l441ktimers/320:30:013
1845724993432,1cyclictest0-21swapper/319:46:583
1845714993428,5cyclictest1829297-21kworker/u8:4+flush-179:019:49:590
1845714993428,4cyclictest0-21swapper/020:45:000
1845724993331,1cyclictest0-21swapper/323:34:593
1845724993330,2cyclictest0-21swapper/322:07:593
184572499330,30cyclictest0-21swapper/323:18:593
1845720993329,2cyclictest0-21swapper/220:23:582
1845716993327,4cyclictest1917814-21kworker/u8:0+events_unbound23:10:001
1845716993322,7cyclictest0-21swapper/120:41:581
1845714993330,2cyclictest0-21swapper/019:40:590
1845714993328,3cyclictest1933120-21apt-get23:40:110
1845724993227,4cyclictest1897335-21turbostat21:50:003
1845720993230,1cyclictest0-21swapper/223:45:002
1845720993230,1cyclictest0-21swapper/221:50:002
1845720993227,3cyclictest0-21swapper/222:10:592
1845714993227,3cyclictest714-21Xorg22:56:590
1845714993226,4cyclictest1939271-21kworker/u8:2+flush-179:000:05:250
184572499310,28cyclictest0-21swapper/320:35:023
184572499310,1cyclictest0-21swapper/322:51:593
184572099310,2cyclictest0-21swapper/223:18:592
184572099310,29cyclictest0-21swapper/222:45:032
1845716993124,6cyclictest1871423-21kworker/u8:2+events_unbound21:10:211
1845716993124,6cyclictest1871423-21kworker/u8:2+events_unbound21:10:211
1845714993128,2cyclictest1848828-21munin-run19:20:000
184571499310,29cyclictest714-21Xorg23:13:590
184571499310,29cyclictest714-21Xorg23:13:590
1845724993028,1cyclictest0-21swapper/323:45:003
184572499300,28cyclictest0-21swapper/300:07:593
1845720993026,2cyclictest0-21swapper/222:33:582
1845720993026,2cyclictest0-21swapper/219:31:592
184572099300,2cyclictest0-21swapper/220:35:012
184572099300,2cyclictest0-21swapper/200:07:582
184572099300,28cyclictest0-21swapper/220:05:122
184572099300,22cyclictest0-21swapper/219:20:142
184572099300,1cyclictest0-21swapper/219:53:592
1845714993026,3cyclictest0-21swapper/000:20:130
1845714993025,4cyclictest1847882-21kworker/u8:1+flush-179:019:20:230
184571499302,3cyclictest1907397-21apt-get22:20:130
1845714993022,6cyclictest714-21Xorg20:07:000
184571499301,2cyclictest1900773-21apt-get22:00:130
4577091290,7ptp4l441ktimers/321:20:003
1845724992927,1cyclictest0-21swapper/322:20:133
1845724992927,1cyclictest0-21swapper/320:23:593
1845724992926,2cyclictest0-21swapper/322:25:123
184572499290,28cyclictest0-21swapper/321:20:123
184572499290,27cyclictest0-21swapper/323:20:133
184572499290,27cyclictest0-21swapper/320:00:133
184572499290,27cyclictest0-21swapper/320:00:123
184572499290,27cyclictest0-21swapper/319:55:013
184572499290,21cyclictest0-21swapper/319:50:133
1845720992926,1cyclictest0-21swapper/222:44:592
1845720992926,1cyclictest0-21swapper/222:44:592
1845720992925,2cyclictest0-21swapper/222:25:122
1845720992925,2cyclictest0-21swapper/221:27:002
184572099290,2cyclictest0-21swapper/220:00:132
184572099290,2cyclictest0-21swapper/220:00:132
184572099290,27cyclictest0-21swapper/221:20:112
184572099290,27cyclictest0-21swapper/221:10:152
184572099290,27cyclictest0-21swapper/221:10:152
184572099290,27cyclictest0-21swapper/219:55:002
184572099290,21cyclictest0-21swapper/223:20:132
184572099290,1cyclictest0-21swapper/221:05:002
1845716992920,5cyclictest0-21swapper/100:30:131
1845714992924,4cyclictest1868870-21hwlatdetect20:20:170
1845714992924,3cyclictest0-21swapper/022:25:130
1845714992923,5cyclictest1871423-21kworker/u8:2+flush-179:020:55:220
184571499291,26cyclictest714-21Xorg21:03:590
184571499290,4cyclictest714-21Xorg19:32:580
4577091280,7ptp4l61490irq/134-eno1-TxRx-021:40:013
4577091280,6ptp4l441ktimers/323:50:013
4577091280,6ptp4l441ktimers/323:30:023
4577091280,6ptp4l441ktimers/321:30:003
1845724992826,1cyclictest0-21swapper/321:10:153
1845724992826,1cyclictest0-21swapper/321:10:143
1845724992825,2cyclictest0-21swapper/320:45:143
184572499280,26cyclictest0-21swapper/322:30:133
184572499280,26cyclictest0-21swapper/321:05:123
184572499280,26cyclictest0-21swapper/320:54:593
1845720992825,2cyclictest0-21swapper/220:30:122
1845720992825,2cyclictest0-21swapper/219:25:122
1845720992825,2cyclictest0-21swapper/200:00:022
184572099280,27cyclictest0-21swapper/222:20:132
184572099280,26cyclictest0-21swapper/219:38:582
184572099280,20cyclictest0-21swapper/220:54:582
184572099280,1cyclictest0-21swapper/219:12:592
1845714992825,2cyclictest0-21swapper/019:14:590
1845714992823,4cyclictest1871199-21unixbench-2d20:25:260
1845714992823,4cyclictest1871199-21unixbench-2d20:25:250
4577091270,6ptp4l61490irq/134-eno1-TxRx-020:35:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-000:30:003
4577091270,6ptp4l441ktimers/323:00:003
4577091270,6ptp4l441ktimers/322:05:003
4577091270,6ptp4l441ktimers/300:40:013
4577091270,5ptp4l61490irq/134-eno1-TxRx-019:40:013
1845724992725,1cyclictest0-21swapper/322:45:003
1845724992725,1cyclictest0-21swapper/322:44:593
1845724992725,1cyclictest0-21swapper/322:11:003
184572499270,26cyclictest0-21swapper/319:31:583
184572499270,1cyclictest0-21swapper/323:55:123
184572499270,1cyclictest0-21swapper/319:12:593
1845720992723,2cyclictest0-21swapper/220:55:592
184572099270,24cyclictest0-21swapper/223:35:592
4577091260,7ptp4l61490irq/134-eno1-TxRx-021:05:003
4577091260,6ptp4l441ktimers/322:40:003
4577091260,6ptp4l441ktimers/300:04:553
4577091260,5ptp4l441ktimers/321:00:013
1845720992623,2cyclictest0-21swapper/222:50:142
1845720992622,2cyclictest0-21swapper/223:48:592
184572099260,24cyclictest0-21swapper/222:38:592
1845714992623,2cyclictest714-21Xorg23:29:590
4577091250,6ptp4l61490irq/134-eno1-TxRx-021:35:003
4577091250,5ptp4l441ktimers/323:40:003
4577091250,5ptp4l441ktimers/322:19:553
4577091250,4ptp4l61490irq/134-eno1-TxRx-000:19:563
4577091250,4ptp4l61490irq/134-eno1-TxRx-000:19:563
1845720992522,2cyclictest0-21swapper/221:17:592
1845720992422,1cyclictest0-21swapper/223:54:592
1845720992421,2cyclictest0-21swapper/223:27:592
1845720992118,2cyclictest0-21swapper/200:30:002
1845714992114,5cyclictest1847882-21kworker/u8:1+flush-179:020:00:160
1845714992114,5cyclictest1847882-21kworker/u8:1+flush-179:020:00:150
1845720992017,2cyclictest0-21swapper/220:13:592
184571699201,3cyclictest1845290-1kworker/1:1H-kblockd19:10:011
1845720991917,1cyclictest0-21swapper/222:04:592
1845720991715,1cyclictest0-21swapper/200:39:582
1845720991714,2cyclictest0-21swapper/222:56:592
1845720991613,2cyclictest0-21swapper/221:37:582
1845720991613,2cyclictest0-21swapper/219:18:592
1845720991512,2cyclictest0-21swapper/220:29:562
1845720991512,2cyclictest0-21swapper/220:29:562
184571499139,3cyclictest151ktimers/019:10:020
18457209930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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