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2026-06-01 - 15:06
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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 50 highest latencies:
System rackeslot6.osadl.org (updated Mon Jun 01, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
100489699142118,21cyclictest1022557-21latency_hist20:05:011
100489699128111,15cyclictest1213033-21systemd-journal19:35:001
100489699128110,16cyclictest1039023-21kworker/u8:2+events_unbound21:20:001
100489699115106,7cyclictest1098734-40mandb00:00:001
10048969911197,10cyclictest1213033-21systemd-journal20:40:011
100489399110102,6cyclictest1045344-21latency_hist21:15:010
10048939910998,8cyclictest1007972-21latency_hist19:20:010
100489699107100,5cyclictest1023550-21kworker/u8:0+flush-179:020:10:011
10048939910696,7cyclictest1068154-21latency_hist22:25:020
10048939910678,9cyclictest1095256-21latency_hist23:50:010
10048969910495,6cyclictest1092781-21kworker/u8:0+flush-179:023:50:031
10048939910497,5cyclictest1081983-21kworker/u8:0+flush-179:023:05:250
10048969910193,5cyclictest1066564-21latency_hist22:20:011
10048939910092,5cyclictest1035845-21kworker/u8:3+events_unbound20:50:010
1004896999991,7cyclictest1039023-21kworker/u8:2+flush-179:021:00:011
1004896999991,7cyclictest1039023-21kworker/u8:2+flush-179:021:00:001
1004896999886,9cyclictest1213033-21systemd-journal23:10:231
1004896999589,4cyclictest1095232-21kworker/u8:2+flush-179:000:00:191
1004893999588,5cyclictest1004814-21kworker/u8:3+flush-179:019:30:240
1004893999585,7cyclictest1080939-21latency_hist23:05:010
1004896999386,5cyclictest1048801-21kworker/u8:0+events_unbound21:40:011
1004896999286,4cyclictest1074564-21kworker/u8:0+flush-179:022:45:001
1004893999184,5cyclictest1106326-21kworker/u8:0+events_unbound00:30:240
1004896999079,8cyclictest1079353-21latency_hist23:00:021
1004896999079,8cyclictest1079353-21latency_hist23:00:011
1004896998983,4cyclictest1003240-21kworker/u8:1+events_unbound19:20:261
1004893998982,4cyclictest1011188-21kworker/u8:2+events_unbound19:45:240
1004893998875,8cyclictest1-21systemd20:40:010
1004896998782,4cyclictest1035845-21kworker/u8:3+events_unbound20:55:011
1004896998780,5cyclictest1003240-21kworker/u8:1+flush-179:019:25:261
1004896998778,7cyclictest1058310-21kworker/u8:0+flush-179:022:05:001
1004896998681,4cyclictest1003240-21kworker/u8:1+flush-179:019:35:231
1004896998680,5cyclictest1084154-21kworker/u8:3+flush-179:023:35:211
1004893998581,3cyclictest1084154-21kworker/u8:3+flush-179:023:20:000
1004896998476,6cyclictest1035845-21kworker/u8:3+flush-179:021:10:201
1004896998474,7cyclictest1039023-21kworker/u8:2+flush-179:021:05:221
1004893998476,6cyclictest1023550-21kworker/u8:0+flush-179:020:25:000
1004893998475,6cyclictest1053815-21kworker/u8:2+flush-179:021:45:010
1004896998377,4cyclictest1035794-21kworker/u8:0+flush-179:020:45:231
1004896998373,4cyclictest1048801-21kworker/u8:0+events_unbound21:40:241
1004893998377,5cyclictest1004814-21kworker/u8:3+flush-179:019:45:000
1004893998375,6cyclictest1003240-21kworker/u8:1+flush-179:019:15:000
1004896998176,4cyclictest1029217-21kworker/u8:3+events_unbound20:25:251
1004896998176,4cyclictest1023550-21kworker/u8:0+events_unbound20:25:011
1004896998175,5cyclictest1058310-21kworker/u8:0+events_unbound22:35:201
1004893998176,4cyclictest1074564-21kworker/u8:0+events_unbound22:45:230
1004893998176,4cyclictest1072895-21kworker/u8:1+flush-179:022:55:250
1004893998176,4cyclictest1072895-21kworker/u8:1+flush-179:022:55:240
1004896998073,6cyclictest1053815-21kworker/u8:2+flush-179:021:45:251
1004893998074,5cyclictest1061564-21kworker/u8:3+flush-179:022:15:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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