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2026-09-18 - 04:12
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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 Fri Sep 18, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
322788199168153,11cyclictest3321210-40mandb00:00:001
322787999151138,10cyclictest609153-21cups-browsed00:00:010
322787999139128,8cyclictest3271070-21latency_hist21:25:010
322787999132115,5cyclictest3224806-21kworker/u8:3+events_unbound19:20:010
322787999129119,8cyclictest3228441-21kworker/u8:1+events_unbound19:15:010
322787999128120,5cyclictest3245343-21kworker/u8:3+flush-179:020:30:150
322787999128117,8cyclictest3285906-21latency_hist22:10:000
322787999127118,7cyclictest3310429-21kworker/u8:0+flush-179:023:40:000
322787999126119,5cyclictest3245343-21kworker/u8:3+flush-179:021:15:000
322787999125119,4cyclictest3272639-21kworker/u8:0+flush-179:021:35:000
322787999122116,4cyclictest3321237-21kworker/u8:2+events_unbound00:10:190
322787999122112,7cyclictest3275851-21apt-get21:40:000
322787999121113,5cyclictest3272639-21kworker/u8:0+flush-179:021:40:030
322787999120115,2cyclictest191rcuc/021:05:010
322787999119113,4cyclictest3332407-21kworker/u8:1+flush-179:000:35:210
322787999119113,4cyclictest3332407-21kworker/u8:1+flush-179:000:35:210
322787999118112,5cyclictest3245343-21kworker/u8:3+flush-179:021:05:240
322787999118112,5cyclictest3245343-21kworker/u8:3+flush-179:021:05:240
322787999118108,8cyclictest3254876-21kworker/u8:0+events_unbound20:45:150
322788199117108,6cyclictest3251714-21latency_hist20:25:001
322787999117109,5cyclictest3321237-21kworker/u8:2+flush-179:000:05:230
322787999117108,6cyclictest3321237-21kworker/u8:2+flush-179:000:30:200
322787999116108,5cyclictest3298671-21kworker/u8:1+flush-179:022:55:240
322787999116106,7cyclictest3245343-21kworker/u8:3+events_unbound20:25:170
322788199115104,7cyclictest3279295-21apt-get21:50:001
322788199115104,7cyclictest3279295-21apt-get21:50:001
322787999115109,4cyclictest3281160-21kworker/u8:3+flush-179:022:00:170
322787999115108,4cyclictest3245343-21kworker/u8:3+flush-179:020:10:200
322787999115107,6cyclictest3234131-21kworker/u8:0+flush-179:019:30:240
322787999114109,4cyclictest3245343-21kworker/u8:3+events_unbound20:20:010
322787999114105,6cyclictest3300223-21latency_hist22:55:010
322787999114104,7cyclictest3237581-21kworker/u8:2+events_unbound19:55:190
322787999113100,10cyclictest1213033-21systemd-journal23:10:000
322788199112102,8cyclictest3321237-21kworker/u8:2+events_unbound00:03:591
322787999112107,4cyclictest3245343-21kworker/u8:3+flush-179:021:15:250
322787999111104,4cyclictest3239922-21kworker/u8:1+events_unbound20:05:160
322787999110103,5cyclictest3303453-21kworker/u8:2+events_unbound23:20:250
32278819910896,9cyclictest3327606-21latency_hist00:20:001
32278799910898,7cyclictest3234149-21latency_hist19:30:010
322787999108102,4cyclictest3234131-21kworker/u8:0+events_unbound19:35:240
322787999108101,5cyclictest3245343-21kworker/u8:3+events_unbound21:25:220
32278799910798,6cyclictest3324407-21kworker/u8:0+events_unbound00:20:150
32278819910698,6cyclictest3297308-21apt-get22:45:121
32278799910699,6cyclictest3303450-21kworker/u8:0+flush-179:023:05:010
32278799910697,7cyclictest3237581-21kworker/u8:2+flush-179:019:45:000
32278799910696,8cyclictest510-21rs:main0
32278799910599,4cyclictest3228441-21kworker/u8:1+flush-179:019:20:140
322787999105100,3cyclictest3298671-21kworker/u8:1+flush-179:023:30:250
32278799910498,4cyclictest3295436-21kworker/u8:3+events_unbound22:40:180
32278799910493,5cyclictest3248505-21kworker/u8:2+events_unbound20:20:140
32278819910393,7cyclictest3303450-21kworker/u8:0+flush-179:023:10:221
32278799910397,4cyclictest3260916-21kworker/u8:2+flush-179:020:55:150
32278799910394,7cyclictest3271050-21kworker/u8:1+events_unbound21:50:020
32278799910296,5cyclictest3288481-21kworker/u8:2+events_unbound22:45:270
32278799910295,5cyclictest3315609-21kworker/u8:2+flush-179:023:40:270
32278799910194,4cyclictest3237581-21kworker/u8:2+events_unbound19:45:150
32278799910193,5cyclictest3286565-21kworker/u8:1+events_unbound22:20:150
32278799910190,8cyclictest3293860-21latency_hist22:35:010
32278819910089,8cyclictest3269740-21apt-get21:20:111
32278819910088,9cyclictest3245343-21kworker/u8:3+flush-179:021:25:151
32278819910087,9cyclictest3308454-21apt-get23:20:121
32278799910094,4cyclictest3298671-21kworker/u8:1+events_unbound23:45:140
3227879999994,4cyclictest3245343-21kworker/u8:3+flush-179:020:35:260
3227879999992,5cyclictest3321237-21kworker/u8:2+events_unbound00:25:140
3227879999992,5cyclictest3245343-21kworker/u8:3+events_unbound20:50:010
3227879999991,5cyclictest3239922-21kworker/u8:1+flush-179:019:50:200
3227881999885,10cyclictest3292527-21apt-get22:30:151
3227879999888,8cyclictest3286565-21kworker/u8:1+events_unbound22:10:200
3227881999788,7cyclictest3234131-21kworker/u8:0+flush-179:019:45:211
3227881999787,7cyclictest3321237-21kworker/u8:2+flush-179:000:05:241
3227881999780,13cyclictest1213033-21systemd-journal20:10:001
3227881999587,5cyclictest3254876-21kworker/u8:0+flush-179:020:40:261
3227881999584,8cyclictest3303450-21kworker/u8:0+flush-179:023:05:201
3227879999590,4cyclictest3303453-21kworker/u8:2+events_unbound23:15:250
3227879999487,5cyclictest3317770-21kworker/u8:3+flush-179:000:15:200
3227881999385,5cyclictest3245343-21kworker/u8:3+flush-179:021:15:221
3227879999275,12cyclictest1213033-21systemd-journal22:40:010
3227879999183,6cyclictest3276888-21kworker/u8:2+events_unbound21:55:210
3227881999080,7cyclictest3245343-21kworker/u8:3+flush-179:020:10:211
3227881999077,10cyclictest3298671-21kworker/u8:1+flush-179:023:00:231
3227881998980,6cyclictest3237581-21kworker/u8:2+flush-179:019:55:251
3227881998979,7cyclictest3276888-21kworker/u8:2+flush-179:021:55:251
3227879998976,9cyclictest3310429-21kworker/u8:0+flush-179:023:25:220
3227881998876,9cyclictest3234131-21kworker/u8:0+flush-179:019:35:211
3227879998882,4cyclictest3321237-21kworker/u8:2+flush-179:000:00:150
3227879998879,7cyclictest3245295-21latency_hist20:05:010
3227881998578,5cyclictest3224806-21kworker/u8:3+flush-179:019:25:151
3227881998576,7cyclictest3253299-21latency_hist20:30:001
3227885998350,32cyclictest0-21swapper/320:45:583
3227881998376,5cyclictest3276888-21kworker/u8:2+flush-179:021:55:001
3227881998371,9cyclictest3289356-21apt-get22:20:121
3227881998266,14cyclictest3240550-21kworker/u8:3+flush-179:019:50:231
3227881998170,8cyclictest3260916-21kworker/u8:2+flush-179:020:55:211
3227881998068,7cyclictest3298671-21kworker/u8:1+flush-179:023:30:231
3227881998049,1cyclictest0-21swapper/100:37:001
3227881998049,1cyclictest0-21swapper/100:37:001
3227881997970,6cyclictest3248505-21kworker/u8:2+flush-179:020:20:011
3227879997975,3cyclictest3276888-21kworker/u8:2+flush-179:021:45:210
3227879997975,3cyclictest3276888-21kworker/u8:2+flush-179:021:45:210
3227881997870,6cyclictest3260916-21kworker/u8:2+flush-179:021:10:121
3227881997868,7cyclictest3272912-21apt-get21:30:101
3227879997873,3cyclictest3290721-21kworker/u8:3+flush-179:022:25:240
3227879997865,5cyclictest3298671-21kworker/u8:1+events_unbound23:50:280
3227881997769,5cyclictest3311369-21latency_hist23:30:011
3227881997765,9cyclictest3314818-21apt-get23:40:111
3227881997764,9cyclictest1213033-21systemd-journal23:20:011
3227881997566,6cyclictest3298671-21kworker/u8:1+events_unbound23:45:251
3227881997565,7cyclictest3254876-21kworker/u8:0+events_unbound20:45:251
3227881997466,6cyclictest3272639-21kworker/u8:0+events_unbound21:35:151
3227881997363,8cyclictest3284575-21apt-get22:05:111
3227881997064,5cyclictest3324407-21kworker/u8:0+events_unbound00:20:261
3227881996962,5cyclictest3228441-21kworker/u8:1+flush-179:019:10:221
3227881996958,8cyclictest3238933-21latency_hist19:45:021
3227881996864,3cyclictest3286565-21kworker/u8:1+flush-179:022:20:011
3227881996862,4cyclictest3300267-21kworker/u8:3+flush-179:023:00:001
3227881996760,6cyclictest3321237-21kworker/u8:2+events_unbound00:30:221
3227881996758,6cyclictest3284321-21latency_hist22:05:001
3227881996757,6cyclictest3276888-21kworker/u8:2+flush-179:022:10:161
3227881996756,8cyclictest3321237-21kworker/u8:2+events_unbound00:25:231
3227884996561,2cyclictest0-21swapper/223:37:582
3227881996559,5cyclictest3297048-21kworker/u8:0+events_unbound22:45:001
3227881996559,4cyclictest3224806-21kworker/u8:3+flush-179:019:17:191
3227881996557,5cyclictest3239922-21kworker/u8:1+flush-179:020:00:261
3227881996556,6cyclictest1213033-21systemd-journal20:30:401
3227881996453,7cyclictest3298671-21kworker/u8:1+flush-179:023:50:191
3227879996459,4cyclictest3288481-21kworker/u8:2+events_unbound22:15:280
3227881996356,5cyclictest3310429-21kworker/u8:0+events_unbound23:35:231
3227881996348,11cyclictest3288481-21kworker/u8:2+events_unbound22:25:131
322788599620,1cyclictest0-21swapper/319:37:593
3227881996052,6cyclictest3245343-21kworker/u8:3+flush-179:021:00:211
3227879996055,4cyclictest3248505-21kworker/u8:2+events_unbound20:40:230
3227881995953,5cyclictest3245343-21kworker/u8:3+events_unbound21:05:211
3227881995953,5cyclictest3245343-21kworker/u8:3+events_unbound21:05:211
3227881995953,4cyclictest3297048-21kworker/u8:0+flush-179:022:50:211
3227881995850,5cyclictest1213033-21systemd-journal20:39:401
3227881995750,5cyclictest3245343-21kworker/u8:3+flush-179:020:50:251
3227885995654,1cyclictest0-21swapper/323:57:593
3227881995449,4cyclictest3276888-21kworker/u8:2+flush-179:021:40:411
3227881995345,6cyclictest3317770-21kworker/u8:3+flush-179:000:15:001
4577091520,13ptp4l441ktimers/319:10:013
3227884995149,1cyclictest0-21swapper/221:34:592
3227881995148,2cyclictest3224806-21kworker/u8:3+events_unbound19:20:231
3227881994540,4cyclictest3288481-21kworker/u8:2+flush-179:022:35:261
322788499420,1cyclictest0-21swapper/222:30:002
3227881994238,3cyclictest3234131-21kworker/u8:0+flush-179:019:32:201
3227885994136,4cyclictest3267891-21turbostat21:15:003
3227884994138,2cyclictest0-21swapper/219:42:582
322788499400,1cyclictest0-21swapper/222:49:592
3227885993933,5cyclictest3316159-21turbostat23:45:013
3227885993933,4cyclictest3253310-21turbostat20:30:003
322788599390,4cyclictest3308197-21turbostat23:19:593
3227884993835,2cyclictest0-21swapper/222:44:562
322788499380,36cyclictest0-21swapper/222:33:002
322788499380,36cyclictest0-21swapper/220:43:592
322788499380,36cyclictest0-21swapper/220:23:592
322788499380,35cyclictest0-21swapper/221:15:012
322788499380,35cyclictest0-21swapper/219:30:002
322788499380,35cyclictest0-21swapper/219:14:552
3227885993734,2cyclictest0-21swapper/321:56:593
322788599370,35cyclictest0-21swapper/319:20:593
322788599370,1cyclictest0-21swapper/320:22:003
3227884993734,2cyclictest0-21swapper/222:22:592
3227884993734,2cyclictest0-21swapper/222:09:552
3227884993734,2cyclictest0-21swapper/220:36:592
3227884993734,2cyclictest0-21swapper/220:16:592
322788499370,35cyclictest0-21swapper/223:32:002
322788499370,35cyclictest0-21swapper/221:36:592
322788499370,35cyclictest0-21swapper/219:52:002
3227885993634,1cyclictest0-21swapper/321:53:593
3227885993633,2cyclictest0-21swapper/322:48:593
3227885993633,2cyclictest0-21swapper/322:33:003
322788599360,35cyclictest0-21swapper/321:35:593
322788599360,35cyclictest0-21swapper/319:52:593
322788599360,35cyclictest0-21swapper/319:46:593
322788599360,35cyclictest0-21swapper/300:35:003
322788599360,1cyclictest0-21swapper/300:25:593
3227884993634,1cyclictest0-21swapper/221:45:002
3227884993634,1cyclictest0-21swapper/220:09:592
3227884993633,2cyclictest0-21swapper/220:03:592
3227884993633,2cyclictest0-21swapper/219:30:582
3227884993632,2cyclictest0-21swapper/219:45:582
322788499360,34cyclictest0-21swapper/200:35:012
322788499360,1cyclictest0-21swapper/223:59:592
322788499360,1cyclictest0-21swapper/223:45:002
322788499360,1cyclictest0-21swapper/220:32:592
322788499360,1cyclictest0-21swapper/220:15:012
3227885993532,2cyclictest0-21swapper/320:51:593
3227885993530,4cyclictest3295451-21turbostat22:40:013
3227885993529,4cyclictest3311379-21turbostat23:30:013
322788599350,1cyclictest0-21swapper/321:25:593
322788599350,1cyclictest0-21swapper/320:59:593
3227884993532,2cyclictest0-21swapper/220:29:002
3227884993532,2cyclictest0-21swapper/219:58:582
3227884993531,2cyclictest0-21swapper/222:15:012
322788499350,1cyclictest0-21swapper/221:10:002
322788499350,1cyclictest0-21swapper/221:10:002
3227884993431,2cyclictest0-21swapper/222:38:592
3227884993431,2cyclictest0-21swapper/221:26:592
3227884993431,2cyclictest0-21swapper/221:18:592
3227885993329,3cyclictest3245308-21turbostat20:09:553
3227885993327,5cyclictest3312961-21turbostat23:34:593
3227884993331,1cyclictest0-21swapper/223:09:592
3227884993331,1cyclictest0-21swapper/221:25:002
3227884993331,1cyclictest0-21swapper/219:20:012
3227884993331,1cyclictest0-21swapper/200:29:592
3227884993331,1cyclictest0-21swapper/200:25:002
3227884993330,2cyclictest0-21swapper/220:48:592
3227884993330,1cyclictest0-21swapper/223:15:002
3227885993230,1cyclictest0-21swapper/322:28:593
3227885993230,1cyclictest0-21swapper/300:00:593
3227884993230,1cyclictest0-21swapper/200:15:002
3227884993229,2cyclictest0-21swapper/222:16:002
3227884993229,2cyclictest0-21swapper/200:03:002
4577091310,7ptp4l441ktimers/323:50:003
4577091310,6ptp4l441ktimers/300:10:003
3227885993129,1cyclictest0-21swapper/300:20:593
3227884993128,2cyclictest0-21swapper/222:55:592
3227884993128,2cyclictest0-21swapper/219:38:002
4577091300,7ptp4l441ktimers/321:45:013
4577091300,6ptp4l441ktimers/300:20:003
3227885993028,1cyclictest0-21swapper/322:06:593
3227885993028,1cyclictest0-21swapper/321:09:003
3227885993028,1cyclictest0-21swapper/321:08:593
322788599300,28cyclictest0-21swapper/320:35:153
3227884993028,1cyclictest0-21swapper/223:55:002
3227884993028,1cyclictest0-21swapper/220:50:592
3227884993027,2cyclictest0-21swapper/223:26:592
3227884993027,2cyclictest0-21swapper/222:02:592
322788499300,28cyclictest0-21swapper/221:50:022
4577091290,7ptp4l441ktimers/319:15:013
4577091290,6ptp4l441ktimers/323:54:563
4577091290,6ptp4l441ktimers/323:05:013
4577091290,6ptp4l441ktimers/322:24:573
4577091290,6ptp4l441ktimers/322:15:013
4577091290,6ptp4l441ktimers/321:25:003
4577091290,6ptp4l441ktimers/320:35:003
4577091290,5ptp4l441ktimers/323:15:003
4577091290,5ptp4l441ktimers/320:05:003
3227885992926,2cyclictest0-21swapper/323:05:133
322788599290,28cyclictest0-21swapper/323:35:123
322788599290,27cyclictest0-21swapper/321:50:013
322788599290,27cyclictest0-21swapper/321:50:013
322788599290,27cyclictest0-21swapper/321:30:113
3227884992926,2cyclictest0-21swapper/223:15:132
3227884992926,2cyclictest0-21swapper/220:55:122
3227884992926,2cyclictest0-21swapper/200:18:002
4577091280,6ptp4l61490irq/134-eno1-TxRx-022:55:003
4577091280,6ptp4l441ktimers/323:24:563
4577091280,5ptp4l441ktimers/300:40:003
4577091280,5ptp4l441ktimers/300:40:003
4577091280,5ptp4l441ktimers/300:15:013
4577091280,4ptp4l61490irq/134-eno1-TxRx-020:00:013
3227885992825,2cyclictest0-21swapper/322:55:133
322788599280,27cyclictest0-21swapper/320:15:133
322788599280,26cyclictest0-21swapper/322:40:143
322788599280,26cyclictest0-21swapper/322:00:143
322788599280,26cyclictest0-21swapper/319:30:133
322788499280,2cyclictest0-21swapper/223:00:132
322788499280,2cyclictest0-21swapper/221:55:132
4577091270,4ptp4l441ktimers/319:45:003
3227885992725,1cyclictest0-21swapper/321:04:553
3227885992725,1cyclictest0-21swapper/320:10:593
322788599270,26cyclictest0-21swapper/322:19:593
3227884992724,2cyclictest0-21swapper/200:38:592
3227884992724,2cyclictest0-21swapper/200:38:582
322788499270,25cyclictest0-21swapper/200:08:582
4577091260,5ptp4l61490irq/134-eno1-TxRx-019:30:003
322788499260,24cyclictest0-21swapper/223:45:132
322788499260,24cyclictest0-21swapper/221:04:592
3227885992523,1cyclictest0-21swapper/321:15:593
322788599250,1cyclictest0-21swapper/319:15:593
3227884992321,1cyclictest0-21swapper/221:49:592
3227884992321,1cyclictest0-21swapper/221:49:592
3227885992220,1cyclictest0-21swapper/320:41:593
3227884992018,1cyclictest0-21swapper/223:22:582
231999200,11rtkit-daemon908065-21snmpd19:05:131
3227884991917,1cyclictest0-21swapper/219:24:562
3227884991815,2cyclictest0-21swapper/222:52:592
3227879991511,3cyclictest0-21swapper/019:10:010
32278849930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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