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2026-08-17 - 04:01
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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 Aug 17, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19415599185174,7cyclictest1213033-21systemd-journal00:00:001
19415299149137,8cyclictest249006-21latency_hist22:00:020
19415299139110,20cyclictest1213033-21systemd-journal00:15:000
19415599131120,9cyclictest199155-21kworker/u8:3+flush-179:019:40:011
19415299128117,7cyclictest174250-21kworker/u8:2+flush-179:020:00:000
19415299125112,10cyclictest221657-21kworker/u8:3+flush-179:021:00:240
19415299125112,10cyclictest221657-21kworker/u8:3+flush-179:021:00:240
19415299124116,5cyclictest199155-21kworker/u8:3+flush-179:019:40:000
19415299122115,4cyclictest274962-21kworker/u8:0+flush-179:023:30:270
19415299122112,7cyclictest202328-21kworker/u8:1+flush-179:019:45:170
19415599121114,5cyclictest218262-21http20:25:001
1941559912099,18cyclictest233334-21apt-get21:10:131
19415599116107,6cyclictest1-21systemd00:15:001
19415599116105,8cyclictest274962-21kworker/u8:0+flush-179:023:40:211
19415299113106,5cyclictest199155-21kworker/u8:3+flush-179:019:40:250
19415599112105,6cyclictest174250-21kworker/u8:2+flush-179:019:55:011
1941559911198,9cyclictest284533-21kworker/u8:2+flush-179:023:50:231
1941529911198,9cyclictest293578-21kworker/u8:1+flush-179:000:35:230
19415299110100,7cyclictest275017-21latency_hist23:20:010
1941559910989,17cyclictest228291-21apt-get20:55:131
1941559910797,8cyclictest273397-21latency_hist23:15:011
1941559910796,9cyclictest255899-21apt-get22:20:121
1941559910796,7cyclictest257285-21kworker/u8:2+events_unbound22:25:021
1941529910795,9cyclictest270482-21apt-get23:05:100
1941559910697,6cyclictest257285-21kworker/u8:2+flush-179:023:25:211
1941559910697,6cyclictest1213033-21systemd-journal23:50:011
1941559910392,8cyclictest257215-21kworker/u8:1+flush-179:022:35:171
1941559910290,9cyclictest510-21rs:main1
1941559910283,17cyclictest244488-21apt-get21:45:121
1941529910291,8cyclictest282963-21latency_hist23:45:000
1941529910193,5cyclictest274962-21kworker/u8:0+flush-179:000:15:160
194155999991,6cyclictest263836-21kworker/u8:0+flush-179:022:45:221
194155999888,7cyclictest291499-21latency_hist00:10:011
194152999892,4cyclictest257215-21kworker/u8:1+flush-179:022:40:000
194155999785,9cyclictest228037-21latency_hist20:55:011
194152999789,6cyclictest284533-21kworker/u8:2+flush-179:023:50:180
194155999689,5cyclictest235335-21kworker/u8:0+flush-179:021:35:161
194155999688,6cyclictest257285-21kworker/u8:2+flush-179:023:05:221
194155999686,8cyclictest250840-21kworker/u8:0+flush-179:022:20:001
194152999686,8cyclictest299722-21latency_hist00:35:010
194155999583,10cyclictest298387-21apt-get00:30:141
194155999487,5cyclictest1213033-21systemd-journal21:05:011
194155999487,5cyclictest1213033-21systemd-journal21:05:011
194155999486,5cyclictest293578-21kworker/u8:1+flush-179:000:35:191
194155999486,5cyclictest221657-21kworker/u8:3+flush-179:020:35:231
194152999484,7cyclictest217701-21kworker/u8:0+flush-179:020:25:220
194155999385,5cyclictest221657-21kworker/u8:3+flush-179:020:45:221
194155999285,4cyclictest257215-21kworker/u8:1+events_unbound22:35:001
194155999284,6cyclictest235335-21kworker/u8:0+flush-179:021:40:141
194155999284,6cyclictest235335-21kworker/u8:0+flush-179:021:20:221
194152999283,7cyclictest202328-21kworker/u8:1+flush-179:020:00:240
194155999183,6cyclictest221671-21latency_hist20:35:011
194152999184,5cyclictest245819-21latency_hist21:50:000
194155999083,5cyclictest257285-21kworker/u8:2+flush-179:022:55:241
194155999083,5cyclictest1213033-21systemd-journal21:57:371
194155998982,5cyclictest274962-21kworker/u8:0+flush-179:023:30:241
194152998983,4cyclictest208713-21kworker/u8:3+flush-179:020:10:170
194152998982,5cyclictest237843-21kworker/u8:1+flush-179:021:50:220
194155998882,4cyclictest265421-21kworker/u8:1+events_unbound22:55:001
194155998879,7cyclictest207084-21latency_hist19:50:011
194155998776,5cyclictest235335-21kworker/u8:0+events_unbound21:25:271
194152998774,7cyclictest255665-21perf22:20:010
194155998680,4cyclictest194090-21kworker/u8:0+flush-179:019:25:181
194152998679,5cyclictest257285-21kworker/u8:2+flush-179:022:30:230
194152998676,6cyclictest174250-21kworker/u8:2+events_unbound19:30:240
194152998577,6cyclictest221657-21kworker/u8:3+events_unbound20:50:010
194155998476,6cyclictest245853-21kworker/u8:3+flush-179:022:00:171
194155998472,10cyclictest296795-21apt-get00:25:121
194152998476,5cyclictest289866-21kworker/u8:1+events_unbound00:05:160
194152998473,8cyclictest249526-21apt-get22:00:120
194152998375,6cyclictest194090-21kworker/u8:0+flush-179:019:15:200
194155998276,4cyclictest237843-21kworker/u8:1+flush-179:021:50:171
194155998276,4cyclictest174250-21kworker/u8:2+flush-179:019:44:551
194155998275,5cyclictest221657-21kworker/u8:3+flush-179:020:40:171
194152998274,6cyclictest217701-21kworker/u8:0+flush-179:020:30:240
194152998274,5cyclictest298133-21latency_hist00:30:010
194152998171,8cyclictest276850-21apt-get23:25:150
194152998171,7cyclictest174250-21kworker/u8:2+flush-179:021:10:230
194152998170,8cyclictest254033-21latency_hist22:15:010
194155997973,4cyclictest245853-21kworker/u8:3+flush-179:022:05:221
194155997972,5cyclictest174250-21kworker/u8:2+flush-179:020:20:011
194152997971,4cyclictest293578-21kworker/u8:1+flush-179:000:20:190
194152997768,6cyclictest257285-21kworker/u8:2+flush-179:023:10:170
194152997669,4cyclictest1-21systemd22:55:000
194152997559,13cyclictest251115-21apt-get22:05:120
194155997468,4cyclictest257285-21kworker/u8:2+events_unbound23:05:001
194152997367,4cyclictest221657-21kworker/u8:3+flush-179:020:40:250
194155997265,5cyclictest202328-21kworker/u8:1+flush-179:020:05:221
194155997165,4cyclictest174250-21kworker/u8:2+events_unbound19:10:211
194152997165,4cyclictest235335-21kworker/u8:0+flush-179:021:40:220
4577091700,29ptp4l441ktimers/319:07:183
194155997061,7cyclictest235335-21kworker/u8:0+flush-179:021:30:241
194152997062,6cyclictest288031-40mandb00:00:010
194155996962,5cyclictest257285-21kworker/u8:2+flush-179:023:20:011
194152996963,4cyclictest221657-21kworker/u8:3+flush-179:020:53:360
194152996962,5cyclictest268893-21apt-get23:00:140
194152996962,5cyclictest174250-21kworker/u8:2+events_unbound20:15:150
194152996960,6cyclictest235335-21kworker/u8:0+events_unbound21:30:210
19416099680,65cyclictest0-21swapper/222:43:582
194155996855,7cyclictest174250-21kworker/u8:2+events_unbound21:10:001
194152996861,5cyclictest274962-21kworker/u8:0+events_unbound00:00:170
194152996861,4cyclictest235335-21kworker/u8:0+events_unbound21:20:000
194152996857,9cyclictest218365-21store20:25:000
194155996761,4cyclictest257285-21kworker/u8:2+flush-179:022:45:021
194155996757,7cyclictest250894-21kworker/u8:1+events_unbound22:10:151
194152996761,4cyclictest174250-21kworker/u8:2+flush-179:019:10:230
194152996760,4cyclictest255605-21kworker/u8:3+events_unbound22:20:230
194152996758,6cyclictest200707-21latency_hist19:30:020
194152996756,5cyclictest257285-21kworker/u8:2+events_unbound22:40:260
194152996659,5cyclictest208713-21kworker/u8:3+flush-179:020:10:000
194152996559,5cyclictest257285-21kworker/u8:2+flush-179:023:20:200
194152996559,5cyclictest174250-21kworker/u8:2+flush-179:019:50:260
194152996556,7cyclictest281375-21latency_hist23:40:010
194155996356,6cyclictest174250-21kworker/u8:2+flush-179:019:15:151
194152996358,3cyclictest1-21systemd20:40:010
194152996355,7cyclictest1213033-21systemd-journal22:48:420
194155996259,2cyclictest217701-21kworker/u8:0+events_unbound20:25:211
194155996256,5cyclictest257285-21kworker/u8:2+events_unbound23:20:241
194155996256,4cyclictest208713-21kworker/u8:3+flush-179:020:10:151
194155996155,4cyclictest194090-21kworker/u8:0+flush-179:019:20:241
194152996055,4cyclictest257285-21kworker/u8:2+flush-179:022:55:280
194152996054,4cyclictest229626-21latency_hist21:00:010
194152996053,5cyclictest239450-21latency_hist21:30:010
194155995947,11cyclictest257285-21kworker/u8:2+flush-179:023:39:541
194152995954,4cyclictest282939-21kworker/u8:1+flush-179:023:45:170
194155995851,5cyclictest202328-21kworker/u8:1+flush-179:019:55:221
194155995851,5cyclictest174250-21kworker/u8:2+flush-179:021:15:161
194155995752,4cyclictest274962-21kworker/u8:0+events_unbound00:00:201
194160995552,2cyclictest0-21swapper/220:30:592
194152995548,5cyclictest194049-21latency_hist19:10:020
194155995446,6cyclictest174250-21kworker/u8:2+flush-179:020:05:001
194152995448,5cyclictest235335-21kworker/u8:0+flush-179:021:20:210
194152995448,5cyclictest194090-21kworker/u8:0+flush-179:019:20:220
194152995442,10cyclictest1213033-21systemd-journal22:30:000
194152995247,4cyclictest235335-21kworker/u8:0+flush-179:021:35:210
194155995143,6cyclictest293874-21journal-offline00:15:151
194160994846,1cyclictest0-21swapper/223:49:592
194160994542,2cyclictest0-21swapper/200:03:592
19415599441,40cyclictest714-21Xorg00:20:591
194152994434,8cyclictest233094-21awk21:10:000
19416499400,39cyclictest0-21swapper/321:04:553
19416499400,39cyclictest0-21swapper/321:04:553
194160994038,1cyclictest0-21swapper/222:05:002
194164993933,5cyclictest255637-21turbostat22:20:013
194164993933,4cyclictest296544-21turbostat00:25:013
19416499390,38cyclictest294941-21turbostat00:19:593
19416499390,38cyclictest284564-21turbostat23:50:003
19416499390,38cyclictest228051-21turbostat20:55:003
19416499390,38cyclictest220100-21turbostat20:30:003
19416499390,37cyclictest205510-21turbostat19:45:013
19416499390,1cyclictest0-21swapper/323:05:003
194164993833,4cyclictest252452-21turbostat22:09:593
19416499380,37cyclictest262255-21turbostat22:40:003
19416499380,37cyclictest234675-21turbostat21:15:003
194160993835,2cyclictest0-21swapper/219:28:592
194164993735,1cyclictest0-21swapper/321:34:553
194164993731,5cyclictest223265-21turbostat20:40:003
19416499370,36cyclictest0-21swapper/319:38:593
194160993734,2cyclictest0-21swapper/221:23:582
194160993731,5cyclictest0-21swapper/220:42:592
194164993634,1cyclictest0-21swapper/320:12:593
194164993634,1cyclictest0-21swapper/319:34:593
194164993631,4cyclictest245826-21turbostat21:54:553
194164993629,6cyclictest207091-21turbostat19:50:003
19416499360,35cyclictest0-21swapper/322:44:593
19416499360,35cyclictest0-21swapper/300:33:593
194164993533,1cyclictest0-21swapper/322:26:593
194164993532,2cyclictest0-21swapper/321:38:593
194164993529,5cyclictest199129-21turbostat19:25:003
19416099350,2cyclictest0-21swapper/220:25:142
194164993432,1cyclictest0-21swapper/323:51:003
194164993432,1cyclictest0-21swapper/322:14:593
194164993432,1cyclictest0-21swapper/300:03:593
194160993432,1cyclictest0-21swapper/223:54:582
194160993432,1cyclictest0-21swapper/221:59:592
194160993431,2cyclictest0-21swapper/223:08:002
194160993431,2cyclictest0-21swapper/221:15:592
194160993430,2cyclictest0-21swapper/221:47:002
194160993425,7cyclictest0-21swapper/222:25:012
19416099340,26cyclictest0-21swapper/219:10:132
19416099340,18cyclictest0-21swapper/219:20:012
194164993331,1cyclictest0-21swapper/321:09:593
194164993331,1cyclictest0-21swapper/300:09:003
194164993330,2cyclictest0-21swapper/300:29:583
194160993330,2cyclictest0-21swapper/220:23:592
194160993329,2cyclictest0-21swapper/220:10:592
194160993229,2cyclictest0-21swapper/220:48:002
194160993224,7cyclictest0-21swapper/200:16:592
4577091310,6ptp4l441ktimers/300:40:003
194164993130,1cyclictest0-21swapper/319:16:583
194164993129,1cyclictest0-21swapper/319:14:003
194160993128,2cyclictest0-21swapper/222:34:002
194160993126,4cyclictest0-21swapper/222:05:142
4577091300,7ptp4l61490irq/134-eno1-TxRx-020:05:003
4577091300,6ptp4l441ktimers/319:30:023
194164993028,1cyclictest0-21swapper/321:58:593
194164993027,2cyclictest0-21swapper/321:40:123
194160993028,1cyclictest0-21swapper/219:21:592
194160993027,2cyclictest0-21swapper/223:55:592
194160993027,2cyclictest0-21swapper/221:05:022
194160993022,6cyclictest0-21swapper/220:57:592
19416099300,2cyclictest0-21swapper/220:35:132
19416099300,2cyclictest0-21swapper/219:40:142
19416099300,28cyclictest0-21swapper/223:15:152
19416099300,28cyclictest0-21swapper/222:45:142
19416099300,28cyclictest0-21swapper/220:15:132
4577091290,7ptp4l61490irq/134-eno1-TxRx-022:55:003
4577091290,6ptp4l441ktimers/323:25:013
4577091290,6ptp4l441ktimers/320:59:553
4577091290,6ptp4l441ktimers/300:14:593
194164992927,1cyclictest0-21swapper/322:55:583
194164992927,1cyclictest0-21swapper/319:56:593
19416499290,28cyclictest0-21swapper/323:35:153
19416499290,27cyclictest0-21swapper/323:05:123
19416499290,27cyclictest0-21swapper/320:30:143
194160992926,2cyclictest0-21swapper/223:40:132
194160992926,2cyclictest0-21swapper/223:10:152
194160992926,2cyclictest0-21swapper/222:55:142
194160992926,2cyclictest0-21swapper/200:05:142
194160992925,2cyclictest0-21swapper/222:12:582
194160992923,5cyclictest0-21swapper/223:30:152
19416099290,28cyclictest0-21swapper/220:05:142
19416099290,27cyclictest0-21swapper/222:15:132
19416099290,27cyclictest0-21swapper/219:45:142
4577091280,6ptp4l441ktimers/322:50:003
4577091280,6ptp4l441ktimers/320:49:563
4577091280,5ptp4l441ktimers/323:14:553
4577091280,5ptp4l441ktimers/320:19:563
194164992826,1cyclictest0-21swapper/323:25:583
194164992826,1cyclictest0-21swapper/323:19:003
194164992825,2cyclictest0-21swapper/300:00:003
19416499280,2cyclictest0-21swapper/321:15:123
19416499280,27cyclictest0-21swapper/320:40:133
19416499280,26cyclictest0-21swapper/322:20:133
19416499280,26cyclictest0-21swapper/320:20:143
19416499280,1cyclictest0-21swapper/322:00:033
19416499280,1cyclictest0-21swapper/321:45:133
194160992826,1cyclictest0-21swapper/221:05:002
194160992826,1cyclictest0-21swapper/221:05:002
194160992826,1cyclictest0-21swapper/220:05:002
194160992825,2cyclictest0-21swapper/221:25:162
194160992824,2cyclictest0-21swapper/222:38:592
19416099280,26cyclictest0-21swapper/223:25:182
19416099280,26cyclictest0-21swapper/221:50:132
19416099280,26cyclictest0-21swapper/221:11:592
19416099280,26cyclictest0-21swapper/220:53:592
19416099280,26cyclictest0-21swapper/200:25:142
19416099280,26cyclictest0-21swapper/200:20:152
19416099280,26cyclictest0-21swapper/200:10:152
194164992725,1cyclictest0-21swapper/323:34:553
194164992724,2cyclictest0-21swapper/322:30:593
19416099270,26cyclictest0-21swapper/221:44:592
19416099270,24cyclictest0-21swapper/222:54:592
4577091260,5ptp4l61490irq/134-eno1-TxRx-019:55:013
194160992624,1cyclictest0-21swapper/219:39:592
194160992623,2cyclictest0-21swapper/221:34:002
19416099260,24cyclictest0-21swapper/219:55:592
4577091250,4ptp4l61490irq/134-eno1-TxRx-023:44:553
194160992523,1cyclictest0-21swapper/223:24:552
194160992522,2cyclictest0-21swapper/223:04:542
19416099250,2cyclictest0-21swapper/221:35:122
194160992220,1cyclictest0-21swapper/219:35:002
194160992219,2cyclictest0-21swapper/200:37:592
194164992119,1cyclictest0-21swapper/321:27:593
194160992018,1cyclictest0-21swapper/222:25:002
194164991917,1cyclictest0-21swapper/321:20:593
194164991816,1cyclictest0-21swapper/320:05:593
194155991814,3cyclictest0-21swapper/119:10:021
19416099118,2cyclictest0-21swapper/223:37:592
1941609996,2cyclictest208678-21turbostat19:55:002
1941609974,2cyclictest0-21swapper/200:32:512
1941609930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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