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2026-08-15 - 04:55
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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 Sat Aug 15, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
316107099165151,10cyclictest3186942-21latency_hist20:30:011
316106899157137,17cyclictest3170759-21latency_hist19:40:010
316106899147139,7cyclictest3165716-21kworker/u8:0+events_unbound19:55:010
316106899145138,5cyclictest3201822-21kworker/u8:3+events_unbound22:45:000
316107099141130,8cyclictest3195412-21latency_hist20:55:011
316106899138129,6cyclictest3233268-21kworker/u8:0+events_unbound23:10:000
316106899138126,10cyclictest1213033-21systemd-journal22:05:010
316106899134122,9cyclictest1213033-21systemd-journal00:04:010
316107099131122,7cyclictest3235766-21kworker/u8:1+flush-179:023:30:241
316107099130108,18cyclictest3167326-21latency_hist19:30:011
316106899127117,8cyclictest1213033-21systemd-journal21:50:010
316106899125119,5cyclictest3167315-21kworker/u8:1+flush-179:019:40:240
316106899124114,7cyclictest3227535-21kworker/u8:2+flush-179:023:00:000
316106899123111,9cyclictest3221134-21latency_hist22:15:010
316106899122115,4cyclictest3240521-21kworker/u8:3+flush-179:023:35:270
316107099121109,9cyclictest3245269-21latency_hist23:30:011
316106899120113,4cyclictest3175579-21kworker/u8:3+flush-179:020:05:010
31610709911994,21cyclictest3201822-21kworker/u8:3+flush-179:022:55:151
316106899119112,5cyclictest3201822-21kworker/u8:3+events_unbound22:25:240
316107099118102,11cyclictest3259744-21kworker/u8:2+flush-179:000:35:251
316106899117109,7cyclictest3165716-21kworker/u8:0+events_unbound19:50:010
316106899117105,9cyclictest3201822-21kworker/u8:3+flush-179:022:35:200
316107099116102,11cyclictest3248416-21kworker/u8:0+flush-179:000:10:001
316106899116110,4cyclictest3165716-21kworker/u8:0+events_unbound19:25:010
316106899116109,5cyclictest3259744-21kworker/u8:2+events_unbound00:20:240
316106899115106,7cyclictest1213033-21systemd-journal22:20:010
316106899115106,7cyclictest1213033-21systemd-journal22:20:000
316106899114103,9cyclictest1213033-21systemd-journal19:35:000
316107099113104,5cyclictest3201822-21kworker/u8:3+events_unbound22:55:001
316106899112103,6cyclictest3201822-21kworker/u8:3+flush-179:021:20:190
31610709911178,22cyclictest3203380-21latency_hist21:20:001
316107099111103,6cyclictest3201822-21kworker/u8:3+events_unbound22:40:241
316106899111105,4cyclictest3208128-21kworker/u8:2+flush-179:021:35:240
316106899111103,7cyclictest3159459-21kworker/u8:3+events_unbound19:15:000
316106899111103,7cyclictest3159459-21kworker/u8:3+events_unbound19:14:590
316106899111103,6cyclictest3184007-21kworker/u8:0+flush-179:020:40:000
31610709911099,7cyclictest3227535-21kworker/u8:2+flush-179:022:50:001
31610689911099,8cyclictest3235766-21kworker/u8:1+flush-179:023:45:200
31610709910999,8cyclictest3255135-21/usr/sbin/munin00:00:171
316106899109102,5cyclictest3201822-21kworker/u8:3+flush-179:021:30:180
316106899108102,4cyclictest3201822-21kworker/u8:3+flush-179:022:30:170
31610689910798,7cyclictest3227535-21kworker/u8:2+flush-179:023:00:220
31610709910688,14cyclictest1213033-21systemd-journal00:15:011
316106899106100,5cyclictest3259744-21kworker/u8:2+flush-179:000:35:000
316106899106100,4cyclictest3220014-21kworker/u8:2+flush-179:022:20:240
31610709910595,7cyclictest3237317-21latency_hist23:05:011
31610709910595,6cyclictest3165716-21kworker/u8:0+flush-179:019:35:151
31610709910296,4cyclictest3165716-21kworker/u8:0+events_unbound19:55:231
31610709910296,4cyclictest3165716-21kworker/u8:0+events_unbound19:55:231
31610689910299,2cyclictest3235766-21kworker/u8:1+flush-179:000:05:240
31610689910296,5cyclictest3165716-21kworker/u8:0+events_unbound20:00:020
31610689910296,5cyclictest3165716-21kworker/u8:0+events_unbound20:00:010
31610689910195,5cyclictest3181933-21kworker/u8:1+flush-179:020:30:220
31610689910195,4cyclictest3159459-21kworker/u8:3+events_unbound19:15:160
31610709910090,7cyclictest3235766-21kworker/u8:1+flush-179:023:15:171
31610689910093,5cyclictest3198581-21kworker/u8:0+flush-179:021:15:000
3161070999787,8cyclictest3205226-21apt-get21:25:101
3161068999790,5cyclictest3233268-21kworker/u8:0+flush-179:023:10:210
3161070999689,4cyclictest1213033-21systemd-journal20:45:011
3161068999689,4cyclictest3195445-21kworker/u8:1+events_unbound21:05:250
3161068999689,4cyclictest3195445-21kworker/u8:1+events_unbound21:05:240
3161068999687,6cyclictest3233268-21kworker/u8:0+flush-179:022:50:230
3161070999585,7cyclictest3235766-21kworker/u8:1+events_unbound23:25:011
3161070999486,6cyclictest3237572-21apt-get23:05:111
3161068999487,5cyclictest3235766-21kworker/u8:1+flush-179:023:40:220
3161068999386,6cyclictest3189627-21kworker/u8:2+events_unbound20:45:010
3161068999286,4cyclictest3235766-21kworker/u8:1+events_unbound00:25:240
3161070999181,7cyclictest3209712-21kworker/u8:0+flush-179:021:45:201
3161070999178,11cyclictest3183508-21apt-get20:20:011
3161070999178,11cyclictest3183508-21apt-get20:20:011
3161068999182,3cyclictest3162578-21kworker/u8:2+flush-179:019:25:250
3161068999083,5cyclictest3235766-21kworker/u8:1+events_unbound00:15:130
3161068999083,5cyclictest3235766-21kworker/u8:1+events_unbound00:15:130
3161068999081,6cyclictest3209712-21kworker/u8:0+flush-179:021:40:150
3161070998980,4cyclictest3181933-21kworker/u8:1+flush-179:020:30:191
3161068998977,10cyclictest1213033-21systemd-journal00:40:000
3161068998882,4cyclictest3175579-21kworker/u8:3+flush-179:020:10:220
3161068998877,9cyclictest1213033-21systemd-journal21:30:010
3161068998781,4cyclictest3235766-21kworker/u8:1+events_unbound23:15:200
3161070998675,8cyclictest3201822-21kworker/u8:3+events_unbound22:30:011
3161070998663,20cyclictest3214769-21latency_hist21:55:011
3161070998573,8cyclictest3253261-21kworker/u8:3+events_unbound23:55:171
3161068998478,5cyclictest3181936-21kworker/u8:2+events_unbound20:20:020
3161068998477,5cyclictest3235766-21kworker/u8:1+flush-179:023:25:140
3161068998477,5cyclictest3235766-21kworker/u8:1+events_unbound00:10:120
3161070998270,7cyclictest3165716-21kworker/u8:0+flush-179:019:30:021
3161070998172,6cyclictest3235766-21kworker/u8:1+flush-179:000:25:171
3161068998172,7cyclictest3253227-21apt-get23:53:410
3161070998075,3cyclictest3175579-21kworker/u8:3+events_unbound20:10:161
3161070998071,6cyclictest3165716-21kworker/u8:0+flush-179:019:45:121
3161068998071,7cyclictest3198581-21kworker/u8:0+flush-179:021:15:210
3161070997970,7cyclictest3200192-21latency_hist21:10:011
3161070997970,7cyclictest3200192-21latency_hist21:10:001
3161070997867,8cyclictest3189627-21kworker/u8:2+flush-179:021:00:211
3161068997874,3cyclictest3235766-21kworker/u8:1+flush-179:023:30:250
3161068997872,4cyclictest3240521-21kworker/u8:3+flush-179:023:20:250
3161068997872,4cyclictest3184007-21kworker/u8:0+events_unbound20:45:130
3161068997871,4cyclictest3181933-21kworker/u8:1+flush-179:020:15:210
3161068997871,4cyclictest3181933-21kworker/u8:1+flush-179:020:15:210
3161068997868,7cyclictest3201822-21kworker/u8:3+flush-179:021:55:210
3161070997770,5cyclictest3172365-21latency_hist19:45:011
3161068997771,5cyclictest3201822-21kworker/u8:3+flush-179:022:05:240
3161068997765,10cyclictest557002-21cupsd00:00:000
3161068997670,3cyclictest3189627-21kworker/u8:2+flush-179:020:55:230
3161070997569,4cyclictest3220014-21kworker/u8:2+flush-179:022:15:141
3161070997569,4cyclictest3220014-21kworker/u8:2+flush-179:022:15:141
3161070997568,5cyclictest3201822-21kworker/u8:3+events_unbound22:05:131
3161070997566,7cyclictest3253273-21latency_hist23:55:011
3161068997570,4cyclictest3201822-21kworker/u8:3+events_unbound22:45:230
3161070997467,5cyclictest3201822-21kworker/u8:3+events_unbound21:55:251
3161070997466,5cyclictest3235766-21kworker/u8:1+events_unbound23:45:261
316107099741,71cyclictest1-21systemd19:20:001
3161070997367,4cyclictest3220014-21kworker/u8:2+flush-179:022:10:231
3161068997363,8cyclictest510-21rs:main0
3161070997166,4cyclictest3201822-21kworker/u8:3+flush-179:021:20:231
3161070997166,3cyclictest3175579-21kworker/u8:3+flush-179:020:05:151
3161070997163,7cyclictest3184007-21kworker/u8:0+events_unbound20:45:141
3161070997060,6cyclictest3159403-21kworker/u8:1+events_unbound19:10:241
3161070997060,6cyclictest3159403-21kworker/u8:1+events_unbound19:10:241
3161070996961,6cyclictest3227512-21latency_hist22:35:011
3161070996954,13cyclictest3198581-21kworker/u8:0+events_unbound21:10:231
3161070996760,5cyclictest3159403-21kworker/u8:1+events_unbound19:20:141
3161070996758,7cyclictest1213033-21systemd-journal00:23:121
3161068996751,11cyclictest1213033-21systemd-journal20:30:000
3161070996558,5cyclictest3181936-21kworker/u8:2+flush-179:020:21:401
3161068996560,4cyclictest3189627-21kworker/u8:2+events_unbound21:00:240
3161070996358,3cyclictest3201822-21kworker/u8:3+events_unbound22:25:011
3161070996258,3cyclictest3227535-21kworker/u8:2+flush-179:022:35:261
3161070996256,4cyclictest3208128-21kworker/u8:2+flush-179:021:35:181
3161070996155,4cyclictest3211374-21kworker/u8:1+events_unbound22:00:241
3161068996152,7cyclictest3160932-21latency_hist19:10:020
3161070996050,8cyclictest3195445-21kworker/u8:1+flush-179:021:00:011
3161070995650,4cyclictest3233268-21kworker/u8:0+flush-179:023:10:201
3161068995651,4cyclictest3189627-21kworker/u8:2+flush-179:020:54:410
3161068995647,6cyclictest3180303-21kworker/u8:0+flush-179:020:09:590
3161070995549,4cyclictest3235766-21kworker/u8:1+flush-179:000:30:151
3161074995451,2cyclictest0-21swapper/200:33:592
3161070995448,4cyclictest3201822-21kworker/u8:3+events_unbound21:30:121
3161074995350,2cyclictest0-21swapper/220:16:592
3161074995350,2cyclictest0-21swapper/220:16:592
3161070995345,6cyclictest1213033-21systemd-journal19:53:351
3161075995249,2cyclictest0-21swapper/300:33:593
3161070995247,4cyclictest3240521-21kworker/u8:3+flush-179:023:35:201
3161075995148,2cyclictest0-21swapper/320:16:593
3161075995148,2cyclictest0-21swapper/320:16:593
3161070995043,5cyclictest3201822-21kworker/u8:3+flush-179:021:40:211
3161070994940,5cyclictest3259744-21kworker/u8:2+flush-179:000:15:111
3161070994940,5cyclictest3259744-21kworker/u8:2+flush-179:000:15:101
4577091480,13ptp4l441ktimers/319:09:563
3161070994639,5cyclictest3248416-21kworker/u8:0+events_unbound23:40:181
3161074994441,1cyclictest0-21swapper/219:34:592
3161070994234,6cyclictest3181933-21kworker/u8:1+flush-179:020:35:161
3161075994139,1cyclictest0-21swapper/319:34:593
316107599410,39cyclictest3253283-21turbostat23:55:003
316107599410,39cyclictest3188807-21turbostat20:35:003
316107599400,39cyclictest3254868-21turbostat00:00:003
316107599400,38cyclictest3172373-21turbostat19:45:003
3161074994036,2cyclictest0-21swapper/223:50:592
3161075993934,4cyclictest3256527-21turbostat00:05:003
316107599390,4cyclictest3225931-21turbostat22:30:003
316107599390,4cyclictest3200195-21turbostat21:10:003
316107599390,4cyclictest3200195-21turbostat21:09:593
316107599390,4cyclictest3177137-21turbostat20:00:013
316107599390,4cyclictest3177137-21turbostat20:00:003
316107599390,38cyclictest3224343-21turbostat22:24:593
316107599390,38cyclictest3219563-21turbostat22:10:003
316107599390,36cyclictest0-21swapper/322:35:593
3161074993936,2cyclictest0-21swapper/219:39:002
316107499390,36cyclictest0-21swapper/200:00:592
316107599380,36cyclictest0-21swapper/321:00:593
3161074993834,2cyclictest0-21swapper/222:08:002
3161074993834,2cyclictest0-21swapper/219:17:592
3161074993833,2cyclictest0-21swapper/219:13:592
3161074993833,2cyclictest0-21swapper/219:13:592
316107499380,36cyclictest0-21swapper/220:52:002
316107499380,35cyclictest0-21swapper/222:34:552
3161075993734,2cyclictest0-21swapper/300:25:593
3161075993731,4cyclictest3208155-21turbostat21:35:003
3161074993734,2cyclictest0-21swapper/200:05:592
3161074993733,2cyclictest0-21swapper/222:19:562
3161074993733,2cyclictest0-21swapper/222:19:552
3161074993733,2cyclictest0-21swapper/221:48:582
316107499370,2cyclictest0-21swapper/222:36:002
316107499370,2cyclictest0-21swapper/221:00:582
3161075993634,1cyclictest0-21swapper/320:56:003
3161075993633,2cyclictest0-21swapper/319:39:003
3161075993629,6cyclictest3232295-21turbostat22:50:013
3161075993628,6cyclictest3209769-21turbostat21:39:593
316107599360,35cyclictest0-21swapper/320:10:003
316107599360,35cyclictest0-21swapper/319:46:593
3161074993633,2cyclictest0-21swapper/220:08:002
3161074993633,2cyclictest0-21swapper/200:23:592
316107499360,1cyclictest0-21swapper/222:15:002
316107499360,1cyclictest0-21swapper/221:55:002
3161075993533,1cyclictest0-21swapper/320:24:593
3161075993532,2cyclictest0-21swapper/300:36:593
316107599350,1cyclictest0-21swapper/319:19:593
3161074993533,1cyclictest0-21swapper/221:35:002
3161074993531,2cyclictest0-21swapper/222:25:592
3161075993432,1cyclictest0-21swapper/321:48:593
3161075993432,1cyclictest0-21swapper/300:05:593
3161074993431,2cyclictest0-21swapper/223:17:592
3161074993431,2cyclictest0-21swapper/222:49:582
3161074993431,2cyclictest0-21swapper/219:57:592
3161074993431,2cyclictest0-21swapper/219:57:582
3161074993430,2cyclictest0-21swapper/222:24:562
3161074993430,2cyclictest0-21swapper/221:26:592
3161075993330,2cyclictest0-21swapper/300:23:593
3161075993330,1cyclictest0-21swapper/321:50:583
316107599330,31cyclictest0-21swapper/322:18:593
316107599330,31cyclictest0-21swapper/322:18:593
3161074993330,2cyclictest0-21swapper/200:15:592
3161074993330,2cyclictest0-21swapper/200:15:592
3161075993230,1cyclictest0-21swapper/319:13:593
3161075993230,1cyclictest0-21swapper/319:13:593
3161075993226,5cyclictest3217971-21turbostat22:05:003
3161074993228,2cyclictest0-21swapper/220:00:592
3161075993128,2cyclictest0-21swapper/323:17:593
3161074993127,2cyclictest0-21swapper/220:31:592
3161075993028,1cyclictest0-21swapper/321:27:003
3161075993025,4cyclictest3259703-21turbostat00:15:003
316107599300,29cyclictest0-21swapper/300:15:123
316107599300,29cyclictest0-21swapper/300:15:123
316107599300,28cyclictest0-21swapper/319:20:133
3161074993028,1cyclictest0-21swapper/222:04:592
3161074993027,2cyclictest0-21swapper/223:00:132
3161074993027,2cyclictest0-21swapper/220:45:032
3161074993027,2cyclictest0-21swapper/200:15:002
3161074993026,2cyclictest0-21swapper/220:40:592
3161074993026,2cyclictest0-21swapper/219:26:592
316107499300,28cyclictest0-21swapper/223:40:142
3161075992927,1cyclictest0-21swapper/323:45:133
3161075992927,1cyclictest0-21swapper/322:40:123
3161075992927,1cyclictest0-21swapper/320:00:593
3161075992926,2cyclictest0-21swapper/320:45:033
316107599290,27cyclictest0-21swapper/323:40:133
316107599290,27cyclictest0-21swapper/321:40:123
316107599290,27cyclictest0-21swapper/320:41:003
316107499290,2cyclictest0-21swapper/223:35:132
316107499290,2cyclictest0-21swapper/221:40:112
316107499290,2cyclictest0-21swapper/221:38:002
316107499290,2cyclictest0-21swapper/220:20:132
316107499290,27cyclictest0-21swapper/223:45:132
316107499290,27cyclictest0-21swapper/222:40:122
316107499290,27cyclictest0-21swapper/221:10:122
316107499290,27cyclictest0-21swapper/219:45:092
316107499290,27cyclictest0-21swapper/219:20:132
3161075992825,2cyclictest0-21swapper/323:34:583
316107599280,27cyclictest0-21swapper/323:35:153
316107599280,27cyclictest0-21swapper/323:00:143
316107599280,27cyclictest0-21swapper/321:10:133
3161074992824,2cyclictest0-21swapper/221:57:592
316107499280,26cyclictest0-21swapper/223:34:582
3161070992824,3cyclictest0-21swapper/120:05:001
4577091270,7ptp4l61490irq/134-eno1-TxRx-023:00:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:55:013
4577091270,6ptp4l441ktimers/323:30:003
4577091270,6ptp4l441ktimers/323:10:003
3161075992724,2cyclictest0-21swapper/323:21:003
316107599270,26cyclictest0-21swapper/319:26:593
316107599270,1cyclictest0-21swapper/321:59:583
3161074992724,2cyclictest0-21swapper/223:28:002
3161074992724,2cyclictest0-21swapper/200:25:132
3161074992723,2cyclictest0-21swapper/222:54:002
316107499270,25cyclictest0-21swapper/223:14:592
4577091260,6ptp4l441ktimers/320:54:593
4577091260,5ptp4l61490irq/134-eno1-TxRx-021:25:013
4577091260,5ptp4l441ktimers/322:35:013
4577091260,4ptp4l441ktimers/320:39:543
3161074992624,1cyclictest0-21swapper/200:39:592
3161074992623,2cyclictest0-21swapper/221:22:002
316107499260,2cyclictest0-21swapper/223:55:102
316107499260,18cyclictest0-21swapper/223:00:002
4577091250,5ptp4l61490irq/134-eno1-TxRx-020:29:563
4577091250,5ptp4l61490irq/134-eno1-TxRx-020:14:553
4577091250,4ptp4l441ktimers/323:14:553
4577091250,4ptp4l441ktimers/322:14:553
4577091240,4ptp4l441ktimers/322:54:553
3161074992421,2cyclictest0-21swapper/220:38:002
3161074992420,2cyclictest0-21swapper/223:07:002
4577091230,4ptp4l441ktimers/321:19:563
3161074992320,2cyclictest0-21swapper/220:58:582
3161074992219,2cyclictest0-21swapper/223:24:592
3161074992219,2cyclictest0-21swapper/219:55:002
3161074992117,2cyclictest0-21swapper/220:25:592
3161070991915,3cyclictest0-21swapper/119:10:021
3161074991815,2cyclictest0-21swapper/220:11:592
3161074991815,2cyclictest0-21swapper/219:41:592
31610749986,2cyclictest0-21swapper/221:10:002
31610749986,2cyclictest0-21swapper/221:10:002
31610749985,2cyclictest0-21swapper/221:19:592
31610749930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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