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2026-09-16 - 08:36
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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 Wed Sep 16, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
199297799142117,21cyclictest2049612-21latency_hist22:05:011
199297699142131,8cyclictest2070293-21latency_hist23:10:010
199297799131119,10cyclictest1213033-21systemd-journal20:25:001
199297699129117,9cyclictest2078507-21latency_hist23:35:000
199297699122112,7cyclictest1996055-21latency_hist19:20:010
199297799118105,10cyclictest1213033-21systemd-journal19:25:011
199297799115102,9cyclictest2080102-21latency_hist23:40:001
199297799113105,5cyclictest2013584-21kworker/u8:3+flush-179:020:35:151
19929779911299,10cyclictest2035549-21apt-get21:20:131
199297799112101,9cyclictest1993123-21apt-get19:10:121
199297699112101,7cyclictest2062344-21latency_hist22:45:000
19929769911199,9cyclictest2081699-21latency_hist23:45:010
19929769910799,6cyclictest2013584-21kworker/u8:3+flush-179:021:05:250
19929779910594,8cyclictest2056232-21apt-get22:25:111
19929779910291,8cyclictest2099532-21latency_hist00:40:021
19929779910290,9cyclictest1213033-21systemd-journal19:45:001
19929769910288,11cyclictest2086520-21cupsd00:00:010
19929779910188,9cyclictest1213033-21systemd-journal00:20:001
19929769910196,4cyclictest2084914-21kworker/u8:3+events_unbound00:09:550
19929779910091,7cyclictest2029996-21latency_hist21:05:001
19929779910091,6cyclictest2060738-21latency_hist22:40:011
1992976999988,8cyclictest2041642-21latency_hist21:40:010
1992977999890,6cyclictest2035161-21gpgv21:20:011
1992977999886,8cyclictest2065514-21latency_hist22:55:001
1992976999887,8cyclictest1213033-21systemd-journal21:45:010
1992977999688,6cyclictest2068710-21latency_hist23:05:021
1992976999691,3cyclictest2044875-21kworker/u8:3+flush-179:022:15:200
1992976999691,3cyclictest2044875-21kworker/u8:3+flush-179:022:15:200
1992976999684,9cyclictest2013805-21apt-get20:15:110
1992977999586,7cyclictest2026779-21kworker/u8:0+flush-179:020:55:181
1992976999586,6cyclictest1994454-21latency_hist19:15:010
1992976999584,8cyclictest2015415-21apt-get20:20:130
1992977999491,2cyclictest2062580-21kworker/u8:0+flush-179:023:00:011
1992977999385,6cyclictest2033165-21latency_hist21:15:011
1992977999382,8cyclictest1213033-21systemd-journal21:30:191
1992977999381,10cyclictest1213033-21systemd-journal00:30:001
1992977999379,10cyclictest1213033-21systemd-journal19:50:141
1992977999280,9cyclictest1213033-21systemd-journal00:05:001
1992977999278,12cyclictest1213033-21systemd-journal21:10:011
1992977999084,4cyclictest2036872-21kworker/u8:3+flush-179:021:25:261
1992977999076,11cyclictest1213033-21systemd-journal00:10:011
1992976998982,5cyclictest2088078-21kworker/u8:2+flush-179:000:20:000
1992976998884,3cyclictest2034990-21kworker/u8:0+events_unbound21:17:010
1992976998881,6cyclictest2062580-21kworker/u8:0+events_unbound00:04:020
1992977998783,3cyclictest2025191-21kworker/u8:1+flush-179:020:55:001
1992977998780,5cyclictest2075571-21/usr/sbin/munin23:25:241
1992977998780,5cyclictest1991835-21kworker/u8:1+flush-179:019:30:261
1992977998778,7cyclictest2062580-21kworker/u8:0+flush-179:023:15:231
1992976998777,8cyclictest2052781-21latency_hist22:15:000
1992977998574,8cyclictest2009030-21kworker/u8:2+flush-179:020:10:191
1992976998581,3cyclictest2013584-21kworker/u8:3+events_unbound21:02:380
1992976998581,3cyclictest2013584-21kworker/u8:3+events_unbound20:44:560
1992976998577,6cyclictest2062580-21kworker/u8:0+flush-179:023:45:220
1992977998476,6cyclictest2000813-21kworker/u8:0+events_unbound19:55:231
1992977998473,9cyclictest1213033-21systemd-journal00:15:001
1992977998275,4cyclictest2049600-21kworker/u8:0+flush-179:022:30:261
1992976998276,4cyclictest2067077-21kworker/u8:2+flush-179:023:11:290
1992976998067,10cyclictest2017000-21apt-get20:25:130
1992976997972,5cyclictest2002416-21latency_hist19:40:000
1992977997872,4cyclictest2067077-21kworker/u8:2+flush-179:023:10:171
1992976997868,8cyclictest2033292-21gpgv21:15:000
1992976997766,8cyclictest1997885-21kworker/u8:2+flush-179:019:30:010
1992976997765,9cyclictest2060796-21kworker/u8:1+flush-179:022:55:190
1992976997764,10cyclictest2021653-21gpgv20:40:010
1992976997671,4cyclictest2043908-21kworker/u8:2+flush-179:021:50:010
1992976997562,10cyclictest2059403-21apt-get22:35:100
1992977997467,5cyclictest2013531-21kworker/u8:1+flush-179:020:30:251
1992977997465,6cyclictest2088078-21kworker/u8:2+events_unbound00:20:191
1992976997469,4cyclictest2060796-21kworker/u8:1+flush-179:022:49:550
1992977997363,8cyclictest1997885-21kworker/u8:2+events_unbound19:45:151
1992977997363,7cyclictest2073784-21kworker/u8:3+events_unbound23:30:151
1992977997362,8cyclictest510-21rs:main1
1992976997365,6cyclictest2000813-21kworker/u8:0+flush-179:020:00:180
1992977997259,12cyclictest2060796-21kworker/u8:1+flush-179:022:40:111
1992976997263,6cyclictest2013531-21kworker/u8:1+events_unbound20:35:010
1992977997165,4cyclictest2009030-21kworker/u8:2+flush-179:020:05:261
1992977997160,9cyclictest2050153-21diskstats22:05:141
1992977997065,3cyclictest1992880-21kworker/u8:3+flush-179:019:25:171
1992976997061,7cyclictest2044875-21kworker/u8:3+events_unbound21:55:220
1992977996962,6cyclictest2043908-21kworker/u8:2+flush-179:021:45:191
1992977996961,5cyclictest2067077-21kworker/u8:2+events_unbound23:05:201
1992976996966,2cyclictest2022022-21kworker/u8:2+flush-179:020:45:150
1992977996862,4cyclictest2060796-21kworker/u8:1+flush-179:022:45:271
1992976996863,4cyclictest2044875-21kworker/u8:3+events_unbound22:30:020
1992976996852,7cyclictest2026802-21latency_hist20:55:010
1992977996760,5cyclictest2084914-21kworker/u8:3+events_unbound00:30:191
1992977996756,9cyclictest2043908-21kworker/u8:2+flush-179:021:50:211
1992977996755,9cyclictest2054646-21apt-get22:20:101
1992977996660,4cyclictest2062580-21kworker/u8:0+events_unbound23:50:251
1992977996657,7cyclictest2023498-21gpgv20:45:011
1992976996660,4cyclictest2044875-21kworker/u8:3+flush-179:022:09:560
1992976996659,5cyclictest2025191-21kworker/u8:1+flush-179:021:25:000
1992976996654,10cyclictest2007441-21apt-get19:55:130
199297899650,63cyclictest0-21swapper/200:24:592
1992977996556,7cyclictest1213033-21systemd-journal19:16:361
1992976996556,7cyclictest2060796-21kworker/u8:1+flush-179:022:50:230
1992976996554,9cyclictest1213033-21systemd-journal21:35:010
1992979996361,1cyclictest0-21swapper/321:33:593
1992977996357,5cyclictest2062580-21kworker/u8:0+flush-179:000:00:001
1992976996354,7cyclictest1992880-21kworker/u8:3+flush-179:019:20:220
199297899620,2cyclictest0-21swapper/219:48:592
1992976996253,6cyclictest2000823-21latency_hist19:35:010
1992976996251,9cyclictest2036862-21kworker/u8:2+flush-179:021:30:010
1992976996155,4cyclictest2084914-21kworker/u8:3+events_unbound00:30:020
1992977996058,1cyclictest2062580-21kworker/u8:0+events_unbound23:45:241
1992977996038,20cyclictest2023885-21apt-get20:45:121
1992977995954,4cyclictest2025191-21kworker/u8:1+flush-179:021:35:271
1992977995950,6cyclictest2040035-21kworker/u8:0+flush-179:021:40:131
1992977995851,5cyclictest2076956-21kworker/u8:2+events_unbound23:40:131
1992977995851,5cyclictest2073784-21kworker/u8:3+flush-179:023:20:101
1992977995849,7cyclictest2000813-21kworker/u8:0+events_unbound20:00:261
1992976995748,7cyclictest2088078-21kworker/u8:2+flush-179:000:20:150
1992976995748,7cyclictest2083538-21apt-get23:50:120
1992977995653,2cyclictest2013531-21kworker/u8:1+flush-179:020:15:201
1992976995646,7cyclictest2075589-21apt-get23:25:120
1992977995547,6cyclictest2044875-21kworker/u8:3+flush-179:021:55:191
1992977995448,5cyclictest1997885-21kworker/u8:2+flush-179:019:35:141
1992976995442,9cyclictest2009030-21kworker/u8:2+flush-179:020:05:200
1992977995345,6cyclictest2044875-21kworker/u8:3+flush-179:022:10:171
1992976995347,5cyclictest2062580-21kworker/u8:0+flush-179:023:15:170
1992976995345,6cyclictest2049600-21kworker/u8:0+flush-179:022:25:220
1992976995342,9cyclictest1997885-21kworker/u8:2+flush-179:019:45:240
1992976995342,9cyclictest1213033-21systemd-journal23:40:000
1992976995250,1cyclictest151ktimers/020:55:360
1992976995147,2cyclictest714-21Xorg23:00:590
1992976995141,8cyclictest2000813-21kworker/u8:0+events_unbound19:40:150
1992976995036,11cyclictest1213033-21systemd-journal00:12:360
4577091480,12ptp4l61490irq/134-eno1-TxRx-019:10:003
199297999450,2cyclictest0-21swapper/323:15:583
1992976994541,3cyclictest2062580-21kworker/u8:0+events_unbound23:24:200
1992976994540,4cyclictest2049600-21kworker/u8:0+flush-179:022:20:130
1992976994536,7cyclictest2045088-21apt-get21:50:120
1992976994441,2cyclictest2092946-21kworker/u8:0+events_unbound00:37:460
1992978994340,2cyclictest0-21swapper/221:33:592
1992976994339,3cyclictest2049600-21kworker/u8:0+events_unbound22:04:240
1992979994139,1cyclictest0-21swapper/322:38:003
1992977994033,5cyclictest2044875-21kworker/u8:3+flush-179:022:15:241
1992977994033,5cyclictest2044875-21kworker/u8:3+flush-179:022:15:231
199297699401,2cyclictest714-21Xorg19:50:580
1992979993931,6cyclictest2049622-21turbostat22:05:003
1992979993835,2cyclictest0-21swapper/320:56:593
199297999380,36cyclictest0-21swapper/323:07:003
199297999380,29cyclictest2005613-21turbostat19:50:013
199297899380,36cyclictest0-21swapper/222:18:592
199297899380,36cyclictest0-21swapper/222:18:582
199297899380,36cyclictest0-21swapper/220:10:592
199297899380,35cyclictest0-21swapper/222:54:552
1992976993833,4cyclictest2009030-21kworker/u8:2+flush-179:020:10:240
4577091370,3ptp4l441ktimers/300:25:133
1992979993730,6cyclictest0-21swapper/323:14:583
1992979993730,6cyclictest0-21swapper/321:25:593
199297999370,36cyclictest0-21swapper/300:06:593
1992978993733,2cyclictest0-21swapper/200:12:592
199297899370,35cyclictest0-21swapper/223:52:592
1992979993634,1cyclictest0-21swapper/320:44:593
199297999360,35cyclictest0-21swapper/322:19:563
199297999360,35cyclictest0-21swapper/322:19:563
199297999360,1cyclictest0-21swapper/321:17:593
1992978993632,2cyclictest0-21swapper/221:48:582
199297899360,1cyclictest0-21swapper/221:24:592
1992979993534,1cyclictest0-21swapper/319:40:593
1992979993532,2cyclictest0-21swapper/322:26:583
199297999350,1cyclictest0-21swapper/300:00:583
1992978993533,1cyclictest0-21swapper/221:59:592
1992978993532,2cyclictest0-21swapper/220:52:592
1992978993532,2cyclictest0-21swapper/219:23:592
1992978993531,2cyclictest0-21swapper/222:24:002
199297899350,1cyclictest0-21swapper/221:51:002
1992979993432,1cyclictest0-21swapper/300:30:583
199297999340,27cyclictest0-21swapper/323:30:123
199297999340,27cyclictest0-21swapper/320:01:003
199297999340,1cyclictest0-21swapper/319:50:133
1992978993432,1cyclictest0-21swapper/222:40:002
1992978993431,2cyclictest0-21swapper/223:57:002
1992979993331,1cyclictest0-21swapper/322:43:583
1992979993330,2cyclictest0-21swapper/320:06:583
1992979993330,2cyclictest0-21swapper/300:23:593
1992979993329,3cyclictest2025220-21turbostat20:50:003
1992978993330,2cyclictest0-21swapper/220:04:552
1992979993230,1cyclictest0-21swapper/321:55:583
199297999320,26cyclictest0-21swapper/321:20:593
1992978993229,2cyclictest0-21swapper/220:29:552
1992978993229,2cyclictest0-21swapper/219:54:002
1992978993229,2cyclictest0-21swapper/200:35:002
1992978993228,2cyclictest0-21swapper/223:11:002
1992979993129,1cyclictest0-21swapper/323:47:583
1992979993129,1cyclictest0-21swapper/321:43:593
1992979993125,5cyclictest0-21swapper/322:06:003
1992978993128,2cyclictest0-21swapper/222:04:552
1992978993128,2cyclictest0-21swapper/219:27:592
1992978993127,2cyclictest0-21swapper/222:41:002
4577091300,7ptp4l441ktimers/322:50:003
1992979993029,1cyclictest0-21swapper/322:57:583
1992979993028,1cyclictest0-21swapper/321:14:563
1992979993025,4cyclictest0-21swapper/323:00:113
1992979993024,5cyclictest0-21swapper/319:17:593
199297999300,26cyclictest0-21swapper/321:00:173
199297999300,26cyclictest0-21swapper/320:30:143
1992978993027,2cyclictest0-21swapper/223:45:142
1992978993027,2cyclictest0-21swapper/223:40:132
1992978993027,2cyclictest0-21swapper/223:31:582
1992978993027,2cyclictest0-21swapper/222:45:132
1992978993027,2cyclictest0-21swapper/221:40:142
1992978993027,2cyclictest0-21swapper/200:15:592
1992978993026,2cyclictest0-21swapper/200:35:132
199297899300,2cyclictest0-21swapper/220:45:142
199297899300,28cyclictest0-21swapper/223:20:112
199297899300,28cyclictest0-21swapper/220:40:022
1992976993025,4cyclictest2097442-21phc2sys-jitter00:30:240
4577091290,7ptp4l441ktimers/320:40:003
4577091290,7ptp4l441ktimers/320:14:553
4577091290,6ptp4l441ktimers/320:20:013
4577091290,6ptp4l441ktimers/300:20:003
4577091290,5ptp4l441ktimers/321:50:013
1992979992928,1cyclictest0-21swapper/319:13:003
1992979992926,2cyclictest0-21swapper/320:27:593
199297999290,28cyclictest0-21swapper/323:55:153
199297999290,28cyclictest0-21swapper/319:20:133
1992978992926,2cyclictest0-21swapper/223:05:142
1992978992926,2cyclictest0-21swapper/222:10:142
1992978992926,2cyclictest0-21swapper/220:40:012
199297899290,27cyclictest0-21swapper/222:05:132
199297899290,27cyclictest0-21swapper/221:15:032
4577091280,6ptp4l441ktimers/320:00:003
1992979992826,1cyclictest0-21swapper/322:50:133
1992979992826,1cyclictest0-21swapper/322:20:123
1992979992826,1cyclictest0-21swapper/321:39:593
1992979992826,1cyclictest0-21swapper/321:07:003
1992979992826,1cyclictest0-21swapper/319:28:593
1992979992826,1cyclictest0-21swapper/300:39:553
1992979992825,2cyclictest0-21swapper/322:13:583
199297999280,26cyclictest0-21swapper/323:35:143
199297999280,26cyclictest0-21swapper/322:30:133
199297999280,26cyclictest0-21swapper/300:10:123
199297999280,1cyclictest0-21swapper/323:50:143
199297999280,1cyclictest0-21swapper/320:20:153
1992978992825,2cyclictest0-21swapper/223:27:002
1992978992825,2cyclictest0-21swapper/222:25:592
1992978992825,2cyclictest0-21swapper/221:28:592
1992978992825,2cyclictest0-21swapper/221:05:122
1992978992825,2cyclictest0-21swapper/220:55:122
1992978992825,2cyclictest0-21swapper/220:20:592
1992978992825,2cyclictest0-21swapper/219:10:592
1992978992825,2cyclictest0-21swapper/200:04:552
199297899280,2cyclictest0-21swapper/220:30:142
199297899280,26cyclictest0-21swapper/223:35:142
199297899280,26cyclictest0-21swapper/221:35:162
199297899280,26cyclictest0-21swapper/221:10:132
199297899280,26cyclictest0-21swapper/200:05:122
199297899280,21cyclictest0-21swapper/223:15:022
4577091270,6ptp4l61490irq/134-eno1-TxRx-023:30:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:40:003
4577091270,4ptp4l441ktimers/319:35:013
1992978992724,2cyclictest0-21swapper/220:17:592
199297899270,24cyclictest0-21swapper/222:34:542
199297899270,1cyclictest0-21swapper/221:00:592
4577091260,5ptp4l61490irq/134-eno1-TxRx-020:55:003
199297999260,25cyclictest0-21swapper/323:44:593
1992978992623,2cyclictest0-21swapper/222:56:592
199297899260,24cyclictest0-21swapper/219:36:582
199297899260,24cyclictest0-21swapper/219:30:132
4577091250,5ptp4l61490irq/134-eno1-TxRx-021:54:563
1992979992523,1cyclictest0-21swapper/323:24:563
1992978992421,2cyclictest0-21swapper/219:40:132
1992976992319,3cyclictest0-21swapper/019:10:020
1992978992219,2cyclictest0-21swapper/219:55:592
1992978992118,2cyclictest0-21swapper/223:00:582
1992978991917,1cyclictest0-21swapper/219:20:012
1992977991916,2cyclictest0-21swapper/119:10:031
1992978991513,1cyclictest0-21swapper/220:06:592
1992978991412,1cyclictest0-21swapper/200:29:582
19929789942,1cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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