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2026-04-12 - 08:28
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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 Sun Apr 12, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121396899127110,14cyclictest1306986-40logrotate00:00:001
12139669910091,6cyclictest1305393-21latency_hist23:55:010
1213968999887,9cyclictest1287299-21kworker/u8:0+flush-179:023:00:011
1213968998668,15cyclictest1225045-21kworker/u8:0+flush-179:019:50:201
1213966998579,4cyclictest1315813-21kworker/u8:0+events_unbound00:35:250
1213966998374,6cyclictest1252315-21kworker/u8:1+flush-179:021:20:210
1213968998172,7cyclictest266-21systemd-journal22:20:001
1213966998173,6cyclictest1276226-21latency_hist22:25:010
1213966998070,7cyclictest1252315-21kworker/u8:1+events_unbound21:10:240
1213968997970,7cyclictest1316869-21latency_hist00:30:011
1213966997972,5cyclictest1268242-21kworker/u8:1+flush-179:022:05:240
1213966997872,4cyclictest1295888-21kworker/u8:3+flush-179:023:55:210
1213968997770,5cyclictest1308657-21latency_hist00:05:011
1213966997769,6cyclictest1246001-21kworker/u8:1+flush-179:021:00:220
1213966997767,7cyclictest1252315-21kworker/u8:1+flush-179:021:15:210
1213966997568,4cyclictest1217717-21kworker/u8:1+events_unbound19:25:150
1213966997567,5cyclictest1225048-21kworker/u8:2+events_unbound20:20:010
1213966997564,9cyclictest1291066-21apt-get23:10:110
1213968997465,6cyclictest1258707-21latency_hist21:30:001
1213966997468,4cyclictest1268306-21kworker/u8:3+events_unbound22:10:150
1213966997267,3cyclictest1213806-21kworker/u8:0+events_unbound19:15:240
1213966997266,5cyclictest1315813-21kworker/u8:0+events_unbound00:30:260
1213966997264,5cyclictest1242579-21kworker/u8:3+events_unbound20:50:000
1213968997165,4cyclictest1252315-21kworker/u8:1+flush-179:021:20:221
1213968997148,20cyclictest1300890-21apt-get23:40:121
1213966997164,5cyclictest1295830-21kworker/u8:2+flush-179:023:30:210
1213966997163,6cyclictest1260294-21latency_hist21:35:010
1213966997163,6cyclictest1213806-21kworker/u8:0+events_unbound19:10:240
1213966997162,6cyclictest1312120-21kworker/u8:3+flush-179:000:20:190
1213968997059,8cyclictest1318466-21latency_hist00:35:021
1213966997058,4cyclictest1225048-21kworker/u8:2+events_unbound19:50:240
1213966996961,5cyclictest1213806-21kworker/u8:0+flush-179:019:30:200
1213968996860,6cyclictest1218643-21latency_hist19:25:021
1213966996861,5cyclictest1268242-21kworker/u8:1+flush-179:022:30:220
1213966996856,10cyclictest1294521-21apt-get23:20:120
121397199670,65cyclictest0-21swapper/223:20:592
1213966996761,4cyclictest1258743-21kworker/u8:2+flush-179:021:35:220
1213966996760,5cyclictest1225048-21kworker/u8:2+flush-179:020:40:230
1213966996759,5cyclictest1284678-21kworker/u8:2+events_unbound22:55:200
1213966996757,7cyclictest1225048-21kworker/u8:2+flush-179:019:45:150
1213968996658,6cyclictest1265075-21latency_hist21:50:011
1213966996660,5cyclictest1225048-21kworker/u8:2+flush-179:020:50:150
1213966996656,7cyclictest1263455-21kworker/u8:0+flush-179:021:45:210
1213968996353,7cyclictest1230032-21/usr/sbin/munin20:00:221
1213968996349,11cyclictest266-21systemd-journal00:20:001
1213966996256,4cyclictest1279640-21kworker/u8:0+flush-179:022:35:220
1213966996254,6cyclictest1303853-21kworker/u8:2+flush-179:000:15:210
1213966996250,4cyclictest1268306-21kworker/u8:3+events_unbound22:00:220
1213968996156,3cyclictest1295830-21kworker/u8:2+flush-179:023:30:241
1213966996156,4cyclictest1290846-21kworker/u8:0+flush-179:023:40:260
1213966996151,7cyclictest1281228-21kworker/u8:1+flush-179:022:45:160
121397499600,1cyclictest0-21swapper/322:51:593
1213968996050,8cyclictest1277818-21apt-get22:30:001
1213968995957,1cyclictest0-21swapper/120:23:591
1213968995952,5cyclictest1247552-21latency_hist20:55:011
1213968995950,6cyclictest266-21systemd-journal23:05:001
1213966995953,4cyclictest1225048-21kworker/u8:2+flush-179:020:05:150
1213968995851,5cyclictest1269858-21latency_hist22:05:011
1213966995854,3cyclictest1281228-21kworker/u8:1+flush-179:023:00:240
1213966995853,4cyclictest1225048-21kworker/u8:2+flush-179:020:04:560
1213966995753,3cyclictest1252315-21kworker/u8:1+flush-179:021:25:210
1213966995745,10cyclictest1310242-21latency_hist00:10:010
1213966995651,4cyclictest1253966-21kworker/u8:3+flush-179:021:40:200
1213966995649,5cyclictest1292652-21apt-get23:15:110
1213968995548,5cyclictest1300625-21latency_hist23:40:011
1213968995543,9cyclictest510-21rs:main1
1213968995542,10cyclictest266-21systemd-journal21:55:001
1213966995547,6cyclictest1225048-21kworker/u8:2+flush-179:020:35:160
1213966995547,5cyclictest1217717-21kworker/u8:1+flush-179:019:40:210
121396699551,52cyclictest1-21systemd20:26:530
1213968995448,3cyclictest1225048-21kworker/u8:2+flush-179:020:30:271
1213966995446,4cyclictest1258743-21kworker/u8:2+flush-179:021:55:150
1213968995346,5cyclictest1225012-21latency_hist19:45:011
1213968995333,18cyclictest714-21Xorg00:36:001
1213966995348,4cyclictest1213879-21kworker/u8:2+events_unbound19:20:110
1213966995346,5cyclictest1306960-21kworker/u8:0+events_unbound00:00:170
1213966995345,4cyclictest1268242-21kworker/u8:1+flush-179:022:15:140
1213966995240,6cyclictest1303853-21kworker/u8:2+events_unbound00:10:020
1213968995039,8cyclictest1246001-21kworker/u8:1+flush-179:021:00:221
1213966995045,4cyclictest1225048-21kworker/u8:2+flush-179:020:10:250
1213966995042,6cyclictest1284678-21kworker/u8:2+flush-179:022:50:160
4577091490,13ptp4l441ktimers/319:10:013
1213968994945,3cyclictest1281228-21kworker/u8:1+flush-179:022:45:261
1213966994941,6cyclictest1249120-21kworker/u8:0+flush-179:021:05:260
1213974994843,4cyclictest1318477-21turbostat00:35:013
1213968994838,7cyclictest266-21systemd-journal21:35:531
1213968994837,9cyclictest1228442-21apt-get19:55:131
1213966994843,4cyclictest1234792-21kworker/u8:0+events_unbound20:20:210
1213966994839,7cyclictest1290846-21kworker/u8:0+events_unbound23:35:200
1213974994744,2cyclictest0-21swapper/323:20:593
1213968994741,4cyclictest1274894-21apt-get22:20:121
1213968994727,17cyclictest1234811-21apt-get20:15:141
1213966994742,4cyclictest1315813-21kworker/u8:0+events_unbound00:25:220
1213968994632,11cyclictest266-21systemd-journal21:20:011
1213966994633,5cyclictest1213806-21kworker/u8:0+events_unbound19:35:130
1213966994633,4cyclictest1295888-21kworker/u8:3+events_unbound23:50:010
1213966994633,4cyclictest1295888-21kworker/u8:3+events_unbound23:50:010
121396699460,9cyclictest1277829-21awk22:30:010
1213968994537,6cyclictest510-21rs:main1
1213966994540,4cyclictest1225048-21kworker/u8:2+flush-179:020:30:210
1213966994539,4cyclictest1281228-21kworker/u8:1+flush-179:022:40:190
121396899440,42cyclictest714-21Xorg21:15:001
1213966994439,4cyclictest1284678-21kworker/u8:2+events_unbound23:05:230
121396699440,42cyclictest1249192-21true21:00:000
121396699440,42cyclictest1249192-21true21:00:000
121397199430,40cyclictest0-21swapper/222:04:552
1213968994322,19cyclictest1214116-21apt-get19:10:111
1213968994317,24cyclictest1279729-21latency_hist22:35:011
121397499420,1cyclictest0-21swapper/300:12:593
121397199420,40cyclictest0-21swapper/223:49:592
121397199420,40cyclictest0-21swapper/223:49:592
1213968994235,5cyclictest1234556-21latency_hist20:15:021
1213968994233,7cyclictest266-21systemd-journal19:30:011
1213968994223,17cyclictest1242741-21ls20:40:011
1213968994222,18cyclictest1295978-21latency_hist23:25:011
121396899421,37cyclictest1262158-21apt-get21:40:131
121397499410,1cyclictest0-21swapper/320:10:593
1213968994135,4cyclictest1284678-21kworker/u8:2+flush-179:023:05:241
1213968994127,12cyclictest266-21systemd-journal23:17:491
1213968994121,18cyclictest1260291-21cron21:35:011
121396899410,39cyclictest1-21systemd21:55:231
1213974994035,4cyclictest1225028-21turbostat19:45:013
1213974994034,5cyclictest1303818-21turbostat23:50:013
1213974994034,5cyclictest1303818-21turbostat23:50:013
1213974994034,5cyclictest1263499-21turbostat21:45:003
121397499400,38cyclictest1320331-21turbostat00:39:593
121397499400,38cyclictest1228194-21turbostat19:54:593
1213968994038,1cyclictest1213806-21kworker/u8:0+flush-179:019:15:211
1213968994033,5cyclictest1242579-21kworker/u8:3+events_unbound20:45:001
1213968994021,17cyclictest0-21swapper/121:10:001
121396899400,3cyclictest714-21Xorg19:36:591
1213974993934,4cyclictest1269861-21turbostat22:05:003
1213974993933,4cyclictest1217051-21turbostat19:24:553
1213968993932,5cyclictest1238008-21apt-get20:25:131
1213968993930,7cyclictest1306960-21kworker/u8:0+flush-179:000:10:201
1213968993924,14cyclictest0-21swapper/122:39:591
121396899390,2cyclictest714-21Xorg00:07:001
1213966993932,5cyclictest266-21systemd-journal19:57:270
1213974993833,4cyclictest1289241-21turbostat23:05:003
1213974993833,4cyclictest1245977-21turbostat20:50:003
1213974993832,5cyclictest1302231-21turbostat23:45:003
1213974993831,6cyclictest1292405-21turbostat23:15:003
121397199380,36cyclictest0-21swapper/223:32:592
121397199380,36cyclictest0-21swapper/222:40:592
121397199380,36cyclictest0-21swapper/219:57:592
121397199380,36cyclictest0-21swapper/219:43:592
121397199380,35cyclictest0-21swapper/222:59:552
121397199380,35cyclictest0-21swapper/220:04:582
121397199380,35cyclictest0-21swapper/219:52:592
121397199380,35cyclictest0-21swapper/219:17:002
1213968993835,2cyclictest714-21Xorg23:50:591
1213968993830,5cyclictest0-21swapper/120:56:001
1213968993830,5cyclictest0-21swapper/120:55:591
1213974993731,4cyclictest1273038-21turbostat22:15:003
1213974993730,5cyclictest1220246-21turbostat19:30:003
1213971993734,2cyclictest0-21swapper/222:12:592
1213971993734,2cyclictest0-21swapper/220:06:592
1213971993734,2cyclictest0-21swapper/200:30:592
121397199370,35cyclictest0-21swapper/221:00:002
121397199370,35cyclictest0-21swapper/220:59:592
121397199370,29cyclictest0-21swapper/223:28:592
1213968993715,20cyclictest0-21swapper/123:25:161
1213974993634,1cyclictest0-21swapper/322:19:553
1213974993630,5cyclictest1236153-21turbostat20:20:003
1213974993630,5cyclictest1217051-21turbostat19:20:013
121397499360,35cyclictest0-21swapper/321:33:593
1213971993634,1cyclictest0-21swapper/220:25:002
1213971993633,2cyclictest0-21swapper/223:57:592
1213971993633,2cyclictest0-21swapper/221:49:552
1213971993633,2cyclictest0-21swapper/221:30:582
121397199360,1cyclictest0-21swapper/222:50:592
121397199360,1cyclictest0-21swapper/220:40:002
1213968993633,2cyclictest0-21swapper/122:42:581
1213966993632,2cyclictest714-21Xorg23:25:590
1213966993631,4cyclictest1258743-21kworker/u8:2+events_unbound21:50:260
4577091350,6ptp4l441ktimers/323:35:003
1213974993533,1cyclictest0-21swapper/300:04:583
1213974993530,4cyclictest1306990-21turbostat00:00:003
121397499350,1cyclictest0-21swapper/322:40:593
1213971993532,2cyclictest0-21swapper/222:34:002
1213971993532,2cyclictest0-21swapper/221:27:002
121396899353,8cyclictest2304-21lightdm-gtk-gre20:08:581
1213968993525,8cyclictest1271698-21apt-get22:10:121
1213974993431,2cyclictest0-21swapper/300:08:003
1213974993428,5cyclictest1284449-21turbostat22:50:003
1213968993426,5cyclictest0-21swapper/119:46:591
1213968993417,16cyclictest0-21swapper/119:10:011
1213968993413,3cyclictest1303810-21munin-run23:50:011
1213968993413,3cyclictest1303810-21munin-run23:50:011
1213968993410,4cyclictest1291558-21cat23:10:171
1213974993327,5cyclictest1268281-21turbostat22:00:003
1213974993327,5cyclictest1253934-21turbostat21:15:003
1213974993327,4cyclictest1297456-21turbostat23:30:003
1213971993331,1cyclictest0-21swapper/221:24:592
1213971993331,1cyclictest0-21swapper/220:45:002
1213971993330,2cyclictest0-21swapper/223:52:592
1213971993330,2cyclictest0-21swapper/220:18:582
1213968993325,6cyclictest1268242-21kworker/u8:1+flush-179:022:05:171
1213974993230,1cyclictest0-21swapper/322:31:593
1213974993230,1cyclictest0-21swapper/321:15:583
1213971993229,2cyclictest0-21swapper/222:47:592
1213971993229,2cyclictest0-21swapper/220:50:582
1213971993229,2cyclictest0-21swapper/219:48:002
1213971993229,2cyclictest0-21swapper/219:13:592
121396899321,11cyclictest1285930-21grep22:50:261
1213974993129,1cyclictest0-21swapper/323:54:003
1213974993129,1cyclictest0-21swapper/323:19:553
1213974993129,1cyclictest0-21swapper/320:07:593
1213974993125,5cyclictest1229791-21turbostat19:59:593
1213971993129,1cyclictest0-21swapper/221:59:592
1213971993128,2cyclictest0-21swapper/223:02:592
1213971993128,2cyclictest0-21swapper/200:38:592
1213971993128,2cyclictest0-21swapper/200:25:592
121397199310,29cyclictest0-21swapper/219:25:132
121396899319,4cyclictest1315120-21cat00:20:231
1213974993028,1cyclictest0-21swapper/320:22:593
1213974993025,4cyclictest1276241-21turbostat22:25:003
1213974993025,4cyclictest1266672-21turbostat21:55:013
121397499300,29cyclictest0-21swapper/300:15:133
1213971993027,2cyclictest0-21swapper/223:44:552
1213971993027,2cyclictest0-21swapper/221:09:552
1213971993027,2cyclictest0-21swapper/221:00:582
121397199300,28cyclictest0-21swapper/200:15:132
4577091290,7ptp4l61490irq/134-eno1-TxRx-019:35:013
1213974992926,2cyclictest0-21swapper/323:05:143
1213974992926,2cyclictest0-21swapper/319:11:593
1213974992926,2cyclictest0-21swapper/300:25:143
121397499290,27cyclictest0-21swapper/320:00:133
1213971992926,2cyclictest0-21swapper/223:35:122
1213971992926,2cyclictest0-21swapper/223:05:142
1213971992926,2cyclictest0-21swapper/221:50:132
121397199290,28cyclictest0-21swapper/220:30:152
121397199290,27cyclictest0-21swapper/222:20:122
4577091280,7ptp4l61490irq/134-eno1-TxRx-021:30:003
4577091280,7ptp4l441ktimers/321:00:003
4577091280,7ptp4l441ktimers/321:00:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-022:10:003
4577091280,6ptp4l441ktimers/322:40:003
4577091280,6ptp4l441ktimers/319:40:003
1213974992826,1cyclictest0-21swapper/322:30:003
1213974992826,1cyclictest0-21swapper/321:05:143
1213974992826,1cyclictest0-21swapper/320:50:133
1213974992826,1cyclictest0-21swapper/319:45:133
1213974992822,5cyclictest1261886-21turbostat21:40:013
121397499280,26cyclictest0-21swapper/321:20:143
1213971992826,1cyclictest0-21swapper/221:19:592
1213971992825,2cyclictest0-21swapper/200:05:122
121397199280,26cyclictest0-21swapper/222:05:592
4577091270,5ptp4l441ktimers/321:49:563
4577091270,5ptp4l441ktimers/320:30:003
1213974992725,1cyclictest0-21swapper/320:42:593
1213974992724,2cyclictest0-21swapper/320:35:143
1213974992722,4cyclictest1250759-21turbostat21:05:003
121397499270,26cyclictest0-21swapper/320:30:153
121397499270,26cyclictest0-21swapper/300:23:593
121397499270,1cyclictest0-21swapper/322:55:133
1213971992724,2cyclictest0-21swapper/221:15:002
1213974992624,1cyclictest0-21swapper/323:40:003
1213971992623,2cyclictest0-21swapper/223:12:592
1213971992623,2cyclictest0-21swapper/220:13:002
1213971992623,2cyclictest0-21swapper/200:00:592
1213971992523,1cyclictest0-21swapper/221:44:592
1213971992522,2cyclictest0-21swapper/223:17:592
1213971992522,2cyclictest0-21swapper/220:25:142
1213971992522,2cyclictest0-21swapper/200:23:592
1213971992522,2cyclictest0-21swapper/200:10:042
1213971992521,2cyclictest0-21swapper/219:20:592
121397199250,2cyclictest0-21swapper/219:36:592
1213971992421,2cyclictest0-21swapper/220:45:022
1213971992420,2cyclictest0-21swapper/221:37:592
1213971992321,1cyclictest0-21swapper/219:34:592
1213971992320,2cyclictest0-21swapper/222:18:002
1213971991917,1cyclictest0-21swapper/222:25:592
1213971991815,2cyclictest0-21swapper/222:40:002
121396699148,5cyclictest1214055-21cut19:10:020
12139719960,5cyclictest0-21swapper/219:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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