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2026-08-05 - 14:17
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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 Wed Aug 05, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
124925299138131,5cyclictest1245509-21kworker/u8:0+events_unbound19:15:011
124925099138128,7cyclictest1296149-21latency_hist21:35:020
124925299137129,7cyclictest1332264-21kworker/u8:3+flush-179:023:55:001
124925099137128,6cyclictest1349782-21kworker/u8:1+events_unbound00:30:000
124925299135123,9cyclictest1213033-21systemd-journal00:04:011
124925299131123,6cyclictest1332264-21kworker/u8:3+events_unbound00:00:011
124925299131123,6cyclictest1332264-21kworker/u8:3+events_unbound00:00:001
124925299128120,6cyclictest1329064-21kworker/u8:1+events_unbound23:30:001
124925099122114,5cyclictest1302774-21latency_hist21:55:010
124925099122112,8cyclictest1289775-21latency_hist21:15:010
124925099122111,8cyclictest1213033-21systemd-journal22:20:000
124925299120101,5cyclictest1320591-21kworker/u8:0+events_unbound23:10:001
124925299118112,5cyclictest1297793-21kworker/u8:0+flush-179:022:00:001
124925299118111,4cyclictest1272935-21kworker/u8:2+events_unbound20:30:161
124925299118111,4cyclictest1272935-21kworker/u8:2+events_unbound20:30:161
124925299118109,6cyclictest1294798-21kworker/u8:2+flush-179:021:45:191
124925299117111,4cyclictest1272935-21kworker/u8:2+flush-179:020:40:011
124925299117107,7cyclictest1259000-21kworker/u8:1+flush-179:019:50:211
124925099116102,9cyclictest1332264-21kworker/u8:3+flush-179:023:35:290
124925099116101,12cyclictest1213033-21systemd-journal20:20:010
124925099115106,6cyclictest1262140-21latency_hist19:50:010
124925299114106,5cyclictest1320591-21kworker/u8:0+events_unbound23:15:011
124925099114106,6cyclictest1314177-21kworker/u8:1+flush-179:022:35:010
124925099114105,6cyclictest1332264-21kworker/u8:3+flush-179:000:00:010
124925099114105,6cyclictest1332264-21kworker/u8:3+flush-179:000:00:000
124925099114105,5cyclictest1280011-21kworker/u8:3+flush-179:021:05:010
124925099114101,10cyclictest1319226-21apt-get22:45:130
124925299113107,4cyclictest1245509-21kworker/u8:0+flush-179:019:15:251
124925299113107,4cyclictest1245509-21kworker/u8:0+flush-179:019:15:241
124925299112105,5cyclictest1348193-21kworker/u8:0+flush-179:000:15:001
124925299112105,5cyclictest1306004-21kworker/u8:3+flush-179:022:10:011
124925299112103,6cyclictest1329064-21kworker/u8:1+flush-179:023:30:211
1249250991121,108cyclictest1-21systemd23:20:010
124925099112107,3cyclictest1316011-21kworker/u8:0+flush-179:022:35:250
124925099112100,8cyclictest1318431-21kworker/u8:3+events_unbound22:45:010
124925299111104,5cyclictest1292158-21kworker/u8:1+flush-179:021:25:171
124925299110102,6cyclictest1343431-21kworker/u8:2+events_unbound00:30:031
124925099110104,4cyclictest1294798-21kworker/u8:2+flush-179:021:45:230
124925299109101,6cyclictest1332264-21kworker/u8:3+flush-179:023:40:201
12492529910898,7cyclictest1294798-21kworker/u8:2+flush-179:022:15:191
12492509910898,7cyclictest1346616-21latency_hist00:10:010
12492509910898,7cyclictest1346616-21latency_hist00:10:000
12492509910898,7cyclictest1329076-21kworker/u8:2+events_unbound23:30:250
12492509910895,9cyclictest1245509-21kworker/u8:0+events_unbound19:10:160
12492529910699,6cyclictest1290011-21kworker/u8:0+flush-179:021:20:001
12492529910699,4cyclictest1343431-21kworker/u8:2+flush-179:000:35:221
12492529910698,5cyclictest1262175-21kworker/u8:3+flush-179:020:20:161
12492529910696,7cyclictest1245509-21kworker/u8:0+events_unbound19:40:231
12492529910686,6cyclictest1279960-21kworker/u8:0+events_unbound20:50:191
12492529910599,4cyclictest1259003-21kworker/u8:2+flush-179:019:45:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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