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2026-08-21 - 19:38
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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 Fri Aug 21, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
402111599143130,9cyclictest4083400-21latency_hist10:25:010
402111799136121,12cyclictest1213033-21systemd-journal11:35:001
402111799132121,8cyclictest510-21rs:main1
402111599129120,6cyclictest4054720-21latency_hist08:55:000
402111799126116,8cyclictest4044920-21latency_hist08:25:021
402111599126115,8cyclictest4107891-21latency_hist11:40:010
402111799125111,11cyclictest1213033-21systemd-journal08:50:001
402111799122113,6cyclictest4032181-21latency_hist07:45:001
402111599121107,8cyclictest1-21systemd11:35:000
402111599120115,3cyclictest4065878-21latency_hist09:30:010
402111599117107,6cyclictest4051336-21true08:45:010
402111599116108,6cyclictest4018025-21kworker/u8:3+events_unbound07:15:000
402111599115107,6cyclictest4094835-21apt-get10:57:580
40211179911399,12cyclictest4059540-21kworker/u8:3+flush-179:009:55:151
40211179910693,9cyclictest4054703-21kworker/u8:2+flush-179:009:00:001
40211179910594,8cyclictest4025790-21latency_hist07:25:001
40211179910294,6cyclictest4032214-21kworker/u8:0+flush-179:008:10:211
40211179910292,7cyclictest4061328-21/usr/sbin/munin09:15:231
40211179910288,10cyclictest1213033-21systemd-journal10:57:551
40211179910192,6cyclictest4099641-21latency_hist11:15:011
4021115999887,8cyclictest510-21rs:main0
4021115999687,7cyclictest4103132-21kworker/u8:0+events_unbound11:30:010
4021117999572,20cyclictest4072790-21diskstats09:50:141
4021117999489,4cyclictest4032214-21kworker/u8:0+flush-179:007:45:211
4021115999484,7cyclictest4090031-21latency_hist10:45:010
4021117999185,4cyclictest4072283-21kworker/u8:0+flush-179:010:35:201
4021117998980,7cyclictest4077073-21kworker/u8:2+flush-179:010:10:001
4021115998981,6cyclictest4009602-21kworker/u8:0+flush-179:007:25:190
4021117998780,5cyclictest4121928-21kworker/u8:0+flush-179:012:25:111
4021115998779,6cyclictest4006140-21kworker/u8:1+events_unbound07:15:240
4021115998776,8cyclictest4077073-21kworker/u8:2+flush-179:010:10:140
4021117998681,3cyclictest4077073-21kworker/u8:2+flush-179:010:10:251
4021117998676,7cyclictest4106513-21/usr/sbin/munin11:35:161
4021117998578,5cyclictest4104925-21kworker/u8:2+events_unbound11:45:241
4021123998477,5cyclictest4069070-21turbostat09:40:003
4021117998476,5cyclictest4104925-21kworker/u8:2+flush-179:011:55:261
4021117998274,5cyclictest4059540-21kworker/u8:3+flush-179:009:25:171
4021117998273,7cyclictest1213033-21systemd-journal09:00:551
4021117998169,9cyclictest4067450-21kworker/u8:1+flush-179:010:00:161
4021115998171,8cyclictest4054703-21kworker/u8:2+events_unbound09:30:190
4021117998070,7cyclictest4081850-21kworker/u8:3+events_unbound10:30:141
4021117997970,7cyclictest4069068-21latency_hist09:40:001
4021117997969,8cyclictest4104925-21kworker/u8:2+flush-179:012:30:231
4021115997972,6cyclictest4104925-21kworker/u8:2+flush-179:011:50:270
4021115997970,7cyclictest4081850-21kworker/u8:3+flush-179:010:30:210
4021115997969,8cyclictest4075697-21apt-get10:00:110
4021115997968,9cyclictest4104925-21kworker/u8:2+flush-179:012:35:190
4021117997770,5cyclictest4091870-21kworker/u8:2+flush-179:011:00:131
4021117997769,5cyclictest4104925-21kworker/u8:2+flush-179:012:15:241
4021117997766,8cyclictest4104925-21kworker/u8:2+flush-179:012:00:201
4021117997752,22cyclictest4036961-21latency_hist08:00:011
4021115997770,5cyclictest4009602-21kworker/u8:0+events_unbound07:30:230
4021115997769,5cyclictest4059540-21kworker/u8:3+flush-179:009:55:220
4021115997768,7cyclictest4037201-21/usr/sbin/munin08:00:160
4021117997671,4cyclictest4096504-21kworker/u8:1+flush-179:012:10:201
4021117997668,5cyclictest4048085-21kworker/u8:3+flush-179:008:35:221
4021117997664,9cyclictest4090285-21apt-get10:45:101
4021115997669,6cyclictest4035340-21kworker/u8:1+events_unbound07:55:240
4021115997666,8cyclictest4093238-21kworker/u8:3+flush-179:011:00:210
4021115997666,8cyclictest4032214-21kworker/u8:0+flush-179:008:20:210
4021117997572,2cyclictest4054703-21kworker/u8:2+events_unbound09:05:131
4021117997571,3cyclictest4096504-21kworker/u8:1+flush-179:011:25:261
4021117997567,6cyclictest4108140-21apt-get11:40:111
4021117997563,9cyclictest4053389-21apt-get08:50:131
4021115997568,5cyclictest4027351-21kworker/u8:2+flush-179:007:40:000
4021117997469,4cyclictest4077073-21kworker/u8:2+flush-179:010:17:001
4021117997464,7cyclictest4072283-21kworker/u8:0+flush-179:010:40:111
4021117997370,2cyclictest4027356-21kworker/u8:3+events_unbound07:50:231
4021115997365,6cyclictest4072283-21kworker/u8:0+events_unbound10:40:010
4021115997363,8cyclictest4051803-21apt-get08:45:100
4021117997267,4cyclictest4100939-21kworker/u8:3+flush-179:011:20:251
4021117997262,7cyclictest4018025-21kworker/u8:3+events_unbound07:10:131
4021117997161,8cyclictest4127251-21latency_hist12:40:021
4021115997062,6cyclictest4059540-21kworker/u8:3+flush-179:009:50:200
4021117996961,7cyclictest4077073-21kworker/u8:2+events_unbound10:25:141
4021115996962,5cyclictest4054703-21kworker/u8:2+flush-179:009:20:170
4021115996962,5cyclictest4038596-21kworker/u8:3+flush-179:008:15:000
4021115996959,8cyclictest4096504-21kworker/u8:1+flush-179:011:25:000
402111799680,65cyclictest714-21Xorg07:36:581
4021115996862,4cyclictest4048085-21kworker/u8:3+flush-179:008:35:170
4021117996760,5cyclictest4006140-21kworker/u8:1+flush-179:007:15:251
4021115996759,6cyclictest1213033-21systemd-journal10:50:000
4021115996759,5cyclictest4117427-21latency_hist12:10:010
4021115996758,7cyclictest4043339-21latency_hist08:20:010
4021115996756,8cyclictest4125647-21latency_hist12:35:010
4021117996657,7cyclictest4059540-21kworker/u8:3+flush-179:009:45:151
4021117996559,4cyclictest4069127-21kworker/u8:2+events_unbound09:45:011
4021117996557,6cyclictest4096504-21kworker/u8:1+flush-179:012:05:201
4021115996559,5cyclictest4044968-21kworker/u8:1+flush-179:009:05:160
4021117996458,5cyclictest4066924-21kworker/u8:0+events_unbound09:30:231
4021117996357,5cyclictest4035340-21kworker/u8:1+flush-179:008:05:011
4021117996351,9cyclictest4038807-21apt-get08:05:101
4021117996351,10cyclictest4047050-21diskstats08:30:141
4021115996350,11cyclictest1213033-21systemd-journal08:10:000
4021115996253,7cyclictest4120610-21apt-get12:20:000
4021115996248,10cyclictest4057950-21true09:05:000
4021117996053,5cyclictest4096453-21kworker/u8:0+events_unbound11:15:011
4021117996047,8cyclictest4096504-21kworker/u8:1+flush-179:012:20:201
4021115996052,7cyclictest4104925-21kworker/u8:2+events_unbound11:40:160
4021115996052,6cyclictest4028943-21kworker/u8:1+flush-179:007:40:200
4021115996052,6cyclictest4027356-21kworker/u8:3+flush-179:007:50:200
4021115996052,6cyclictest4006140-21kworker/u8:1+events_unbound07:20:140
4021115995954,4cyclictest4044968-21kworker/u8:1+flush-179:008:55:220
4021115995852,5cyclictest4086869-21kworker/u8:1+events_unbound10:50:230
4021115995848,8cyclictest4104925-21kworker/u8:2+events_unbound11:55:220
231999580,5rtkit-daemon2318-21rtkit-daemon08:25:130
4021115995749,6cyclictest4085247-21latency_hist10:30:010
4021123995654,1cyclictest0-21swapper/307:51:593
4021117995649,5cyclictest4027356-21kworker/u8:3+flush-179:007:35:011
4021115995648,6cyclictest4041768-21kworker/u8:2+events_unbound08:30:230
4021117995547,7cyclictest4044968-21kworker/u8:1+events_unbound08:25:141
4021117995543,9cyclictest4038596-21kworker/u8:3+events_unbound08:15:181
4021115995545,8cyclictest1213033-21systemd-journal07:50:000
4021115995445,6cyclictest4119013-21latency_hist12:15:010
4021117995332,19cyclictest714-21Xorg11:50:591
4021121995147,2cyclictest0-21swapper/211:52:002
4021117995142,7cyclictest4098055-21latency_hist11:10:011
4021115995141,7cyclictest4096504-21kworker/u8:1+events_unbound11:15:140
231999510,6rtkit-daemon2318-21rtkit-daemon12:20:110
4021121995047,2cyclictest0-21swapper/209:21:592
402111799490,1cyclictest0-21swapper/109:24:551
4577091480,24ptp4l61490irq/134-eno1-TxRx-007:05:283
4021117994844,3cyclictest4009602-21kworker/u8:0+events_unbound07:25:141
4021117994842,4cyclictest4083415-21apt-get10:25:001
4021123994741,5cyclictest4043330-21turbostat08:20:003
4021115994745,1cyclictest4059540-21kworker/u8:3+flush-179:009:45:170
4021115994741,5cyclictest4096504-21kworker/u8:1+flush-179:011:10:240
4021115994642,3cyclictest4070748-21latency_hist09:45:000
4021115994439,4cyclictest4093238-21kworker/u8:3+flush-179:011:05:120
402112199430,1cyclictest0-21swapper/212:06:002
4021117994337,5cyclictest4059540-21kworker/u8:3+events_unbound09:10:141
4021115994337,5cyclictest4096504-21kworker/u8:1+flush-179:011:49:560
4021123994236,4cyclictest4032198-21turbostat07:44:593
4021115994234,7cyclictest4115529-21switchtime12:00:250
402111599421,39cyclictest714-21Xorg12:25:580
402111599420,5cyclictest1213033-21systemd-journal10:10:000
4021121994138,2cyclictest0-21swapper/211:57:592
4021121994138,2cyclictest0-21swapper/208:13:002
4021115994135,5cyclictest4077073-21kworker/u8:2+events_unbound10:15:150
4021115994034,4cyclictest4021132-21latency_hist07:10:020
4021123993934,4cyclictest4125656-21turbostat12:35:003
4021123993933,5cyclictest4112648-21turbostat11:55:003
4021123993933,5cyclictest4064299-21turbostat09:25:003
4021121993936,2cyclictest0-21swapper/211:39:592
4021115993931,6cyclictest4054703-21kworker/u8:2+events_unbound09:15:140
4021123993836,1cyclictest0-21swapper/310:49:593
402112399380,37cyclictest4115846-21turbostat12:05:003
402112199380,35cyclictest0-21swapper/210:24:592
402112199380,35cyclictest0-21swapper/207:29:592
4021121993734,2cyclictest0-21swapper/209:39:002
402112199370,2cyclictest0-21swapper/207:53:592
4021123993634,1cyclictest0-21swapper/312:39:003
4021123993634,1cyclictest0-21swapper/308:52:593
4021123993634,1cyclictest0-21swapper/307:17:593
4021123993630,5cyclictest4072259-21turbostat09:50:013
402112399360,35cyclictest0-21swapper/311:22:003
4021121993633,2cyclictest0-21swapper/210:36:002
4021121993633,2cyclictest0-21swapper/207:39:552
4021121993633,2cyclictest0-21swapper/207:19:552
402112199360,2cyclictest0-21swapper/209:10:592
4021117993622,11cyclictest4091875-21http10:50:121
4021123993533,1cyclictest0-21swapper/307:49:583
4021123993530,4cyclictest4093216-21turbostat10:54:593
402112399350,1cyclictest0-21swapper/309:15:593
4021121993533,1cyclictest0-21swapper/210:35:002
4021121993532,2cyclictest0-21swapper/210:58:582
4021121993532,2cyclictest0-21swapper/209:44:592
4021123993432,1cyclictest0-21swapper/311:04:553
4021121993432,1cyclictest0-21swapper/207:35:002
4021121993431,2cyclictest0-21swapper/210:06:592
4021121993431,1cyclictest0-21swapper/212:30:012
4021121993330,2cyclictest0-21swapper/207:24:002
4021123993230,1cyclictest0-21swapper/310:31:593
4021123993230,1cyclictest0-21swapper/310:11:593
4021121993230,1cyclictest0-21swapper/210:20:012
4021121993230,1cyclictest0-21swapper/209:20:002
4021121993230,1cyclictest0-21swapper/208:44:592
4021121993230,1cyclictest0-21swapper/208:29:592
4577091310,7ptp4l441ktimers/308:10:013
4021123993129,1cyclictest0-21swapper/311:14:593
402112399310,30cyclictest0-21swapper/310:44:593
402112399310,30cyclictest0-21swapper/308:46:593
4021121993129,1cyclictest0-21swapper/211:10:002
4021121993128,2cyclictest0-21swapper/211:42:592
402111799311,25cyclictest4021208-21latency_hist07:10:011
4021115993110,4cyclictest4069053-21sendmail09:40:000
4577091300,7ptp4l441ktimers/311:30:003
4577091300,7ptp4l441ktimers/310:20:013
4021123993028,1cyclictest0-21swapper/309:57:593
4021123993028,1cyclictest0-21swapper/308:34:583
4021123993027,2cyclictest0-21swapper/312:26:593
4021123993027,2cyclictest0-21swapper/312:06:003
402112399300,28cyclictest0-21swapper/311:45:143
4021121993027,2cyclictest0-21swapper/211:33:592
4021121993027,2cyclictest0-21swapper/211:20:132
402112199300,28cyclictest0-21swapper/211:10:132
4577091290,7ptp4l61490irq/134-eno1-TxRx-010:40:013
4577091290,7ptp4l61490irq/134-eno1-TxRx-007:35:003
4577091290,6ptp4l441ktimers/308:15:013
4577091290,6ptp4l441ktimers/307:25:013
4021123992927,1cyclictest0-21swapper/309:25:593
402112399290,28cyclictest0-21swapper/309:50:123
402112399290,27cyclictest0-21swapper/308:20:113
402112399290,27cyclictest0-21swapper/308:00:123
4021121992926,2cyclictest0-21swapper/211:45:132
4021121992926,2cyclictest0-21swapper/211:01:592
4021121992926,2cyclictest0-21swapper/210:04:552
4021121992926,2cyclictest0-21swapper/209:53:002
4021121992926,2cyclictest0-21swapper/209:25:142
4021121992926,2cyclictest0-21swapper/209:00:002
4021121992926,2cyclictest0-21swapper/207:40:122
402112199290,27cyclictest0-21swapper/212:30:122
402112199290,27cyclictest0-21swapper/211:25:132
402112199290,27cyclictest0-21swapper/210:40:112
402112199290,27cyclictest0-21swapper/208:45:042
402112199290,27cyclictest0-21swapper/208:15:132
402112199290,27cyclictest0-21swapper/208:00:122
4577091280,6ptp4l441ktimers/309:35:003
4577091280,5ptp4l441ktimers/308:40:003
4021123992827,1cyclictest0-21swapper/309:02:593
4021123992826,1cyclictest0-21swapper/310:25:023
402112399280,2cyclictest0-21swapper/311:30:123
402112399280,27cyclictest0-21swapper/311:55:153
402112399280,27cyclictest0-21swapper/310:57:593
402112399280,26cyclictest0-21swapper/310:00:123
402112399280,26cyclictest0-21swapper/308:25:123
4021121992825,2cyclictest0-21swapper/212:35:112
4021121992825,2cyclictest0-21swapper/211:15:012
4021121992825,2cyclictest0-21swapper/210:49:552
4021121992825,2cyclictest0-21swapper/210:25:022
4021121992825,2cyclictest0-21swapper/209:07:592
4021121992825,2cyclictest0-21swapper/208:55:002
4577091270,6ptp4l441ktimers/309:10:003
4577091270,6ptp4l441ktimers/309:00:013
4577091270,5ptp4l61490irq/134-eno1-TxRx-007:14:553
4577091270,5ptp4l441ktimers/312:20:013
4577091270,5ptp4l441ktimers/312:15:003
4577091270,5ptp4l441ktimers/311:09:593
4577091270,5ptp4l441ktimers/310:10:013
4577091270,5ptp4l441ktimers/307:40:013
4021123992725,1cyclictest0-21swapper/311:39:593
4021123992725,1cyclictest0-21swapper/309:10:593
4021123992724,2cyclictest0-21swapper/307:29:583
4021121992724,2cyclictest0-21swapper/207:45:122
4577091260,6ptp4l61490irq/134-eno1-TxRx-010:25:003
4021123992625,1cyclictest0-21swapper/311:15:013
4021123992623,2cyclictest0-21swapper/311:41:593
4021121992623,2cyclictest0-21swapper/212:24:542
4021121992623,2cyclictest0-21swapper/212:03:582
4021121992623,2cyclictest0-21swapper/209:34:552
4021121992623,2cyclictest0-21swapper/207:56:002
402112199260,24cyclictest0-21swapper/210:52:592
4577091250,5ptp4l61490irq/134-eno1-TxRx-009:45:003
4577091250,5ptp4l61490irq/134-eno1-TxRx-008:00:003
4577091250,4ptp4l61490irq/134-eno1-TxRx-012:24:553
4577091250,4ptp4l441ktimers/308:44:563
4021121992522,2cyclictest0-21swapper/212:17:582
402112199250,2cyclictest0-21swapper/212:11:592
402112199250,2cyclictest0-21swapper/208:31:002
4021121992421,2cyclictest0-21swapper/208:23:592
4021121992218,2cyclictest0-21swapper/209:04:562
4021121992119,1cyclictest0-21swapper/209:59:592
4021121992118,2cyclictest0-21swapper/208:35:132
4021121992017,2cyclictest0-21swapper/210:10:122
4021121991816,1cyclictest0-21swapper/207:14:592
4021121991714,2cyclictest0-21swapper/209:47:592
4021121991412,1cyclictest0-21swapper/208:09:592
40211219930,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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