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2026-09-08 - 06:11
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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 Tue Sep 08, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
120285699162148,10cyclictest1272545-21latency_hist22:45:011
120285699151138,10cyclictest1213033-21systemd-journal23:05:001
120285299134105,17cyclictest1291639-21latency_hist23:45:010
120285699132120,9cyclictest1241783-21latency_hist21:10:011
120285299131119,8cyclictest1232232-21latency_hist20:40:000
120285699130123,4cyclictest1264316-21kworker/u8:1+flush-179:022:50:201
120285699130119,8cyclictest1262724-21latency_hist22:15:011
120285699129117,10cyclictest1213033-21systemd-journal21:35:001
120285699123115,6cyclictest1275751-21kworker/u8:0+events_unbound23:20:001
120285699123112,8cyclictest1217434-21kworker/u8:3+flush-179:020:00:151
120285699120114,4cyclictest1286905-21kworker/u8:2+events_unbound23:40:021
120285699120109,8cyclictest1207565-21kworker/u8:2+flush-179:019:40:151
120285699118102,13cyclictest1290090-21kworker/u8:3+events_unbound00:00:001
120285299118113,3cyclictest1264370-21kworker/u8:2+flush-179:022:25:220
120285299118105,10cyclictest1241773-21kworker/u8:0+flush-179:021:20:260
120285699114103,7cyclictest1213033-21systemd-journal23:44:591
120285699113106,4cyclictest1295045-21kworker/u8:1+events_unbound00:00:251
12028569911198,9cyclictest1248444-21kworker/u8:2+flush-179:021:40:221
120285699111100,8cyclictest1265920-21latency_hist22:25:011
120285299110100,7cyclictest1210762-21latency_hist19:35:020
120285299110100,7cyclictest1210762-21latency_hist19:35:010
12028569910897,9cyclictest1242019-21/usr/sbin/munin21:10:171
12028569910896,9cyclictest1285528-21apt-get23:25:111
120285699107102,4cyclictest1238654-21kworker/u8:1+flush-179:021:00:181
12028569910697,6cyclictest1256613-21apt-get21:55:111
12028529910692,10cyclictest1217395-21apt-get19:55:000
12028569910598,5cyclictest1227241-21kworker/u8:2+flush-179:020:45:161
12028569910596,6cyclictest1250028-21kworker/u8:0+flush-179:021:35:231
12028529910594,9cyclictest1257922-21kworker/u8:0+flush-179:022:15:260
12028569910398,4cyclictest1272525-21kworker/u8:2+flush-179:022:45:231
12028569910295,5cyclictest1290090-21kworker/u8:3+flush-179:000:15:161
12028569910192,6cyclictest1256327-21kworker/u8:3+flush-179:022:00:191
12028569910186,12cyclictest1213033-21systemd-journal21:30:001
12028569910085,12cyclictest1213033-21systemd-journal19:55:011
1202856999989,7cyclictest1309480-21latency_hist00:40:011
1202852999991,5cyclictest1220320-21kworker/u8:0+flush-179:020:05:250
1202852999887,8cyclictest1283944-21apt-get23:20:110
1202856999792,3cyclictest1275751-21kworker/u8:0+flush-179:023:20:161
1202856999689,5cyclictest1248444-21kworker/u8:2+flush-179:021:50:211
1202856999588,5cyclictest1201308-21kworker/u8:2+flush-179:019:10:231
1202852999586,7cyclictest1223989-21kworker/u8:1+events_unbound20:20:010
1202856999385,4cyclictest1227241-21kworker/u8:2+flush-179:020:25:221
1202856999384,6cyclictest1201299-21kworker/u8:1+events_unbound19:55:251
1202852999376,12cyclictest1228798-21apt-get20:30:000
1202856999286,4cyclictest1217434-21kworker/u8:3+flush-179:020:15:261
1202852999279,10cyclictest1295045-21kworker/u8:1+events_unbound00:20:240
1202856999184,5cyclictest1201299-21kworker/u8:1+flush-179:019:20:001
1202852999183,6cyclictest1257922-21kworker/u8:0+flush-179:022:10:180
1202852999181,7cyclictest1227241-21kworker/u8:2+flush-179:020:50:140
1202856999083,5cyclictest1290090-21kworker/u8:3+flush-179:000:10:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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