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2026-09-04 - 21:59
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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 Fri Sep 04, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
418982499154136,15cyclictest4604-21kworker/u8:0+flush-179:007:45:011
418982499154136,15cyclictest4604-21kworker/u8:0+flush-179:007:45:011
418982499153141,8cyclictest91424-21latency_hist12:05:011
418982399147140,5cyclictest23512-21kworker/u8:1+flush-179:009:30:000
418982399145130,11cyclictest65745-21kworker/u8:2+flush-179:011:05:000
418982499137126,9cyclictest1213033-21systemd-journal09:35:011
418982499135128,5cyclictest97768-21kworker/u8:1+flush-179:012:25:251
418982399133125,5cyclictest634-21kworker/u8:3+flush-179:007:40:000
418982399128116,9cyclictest68866-21kworker/u8:0+flush-179:011:45:190
418982399127116,8cyclictest510-21rs:main0
418982399121114,5cyclictest81848-21kworker/u8:3+flush-179:011:50:270
418982399121112,6cyclictest8951-21latency_hist07:50:010
418982499119106,10cyclictest1213033-21systemd-journal10:35:141
418982499117106,8cyclictest7115-21apt-get07:45:031
418982499116109,5cyclictest68866-21kworker/u8:0+flush-179:011:10:261
418982499115104,7cyclictest26716-21kworker/u8:0+events_unbound08:50:011
418982499115103,10cyclictest4193239-21kworker/u8:2+flush-179:007:30:001
418982499112102,8cyclictest65745-21kworker/u8:2+flush-179:011:05:201
418982499111106,4cyclictest15297-21kworker/u8:0+events_unbound08:30:011
418982499111101,7cyclictest54553-21kworker/u8:0+flush-179:010:10:231
418982499111101,7cyclictest54553-21kworker/u8:0+flush-179:010:10:231
418982399111104,5cyclictest88482-21apt-get11:55:120
418982399111101,7cyclictest65702-21latency_hist10:45:010
418982499110103,5cyclictest52691-21kworker/u8:1+flush-179:010:05:201
41898239911075,6cyclictest72078-21apt-get11:05:020
418982399109101,5cyclictest1-21systemd08:35:010
41898249910798,6cyclictest26724-21latency_hist08:45:011
418982499107101,4cyclictest15297-21kworker/u8:0+events_unbound08:15:131
418982499107100,5cyclictest23512-21kworker/u8:1+flush-179:008:35:001
41898239910795,9cyclictest4190042-21apt-get07:10:120
41898249910697,5cyclictest23512-21kworker/u8:1+flush-179:009:35:211
41898249910296,4cyclictest15297-21kworker/u8:0+events_unbound08:20:221
41898249910295,5cyclictest46067-21kworker/u8:0+flush-179:009:50:241
41898239910293,6cyclictest4189742-21latency_hist07:10:020
41898249910195,5cyclictest68866-21kworker/u8:0+events_unbound11:35:251
41898249910194,5cyclictest62229-21kworker/u8:1+flush-179:010:45:211
41898239910193,6cyclictest54553-21kworker/u8:0+flush-179:010:30:180
4189824999992,5cyclictest4188281-21kworker/u8:1+flush-179:007:30:191
4189824999791,4cyclictest7160-21kworker/u8:2+flush-179:007:55:141
4189824999787,8cyclictest44748-21apt-get09:40:101
4189824999689,5cyclictest54553-21kworker/u8:0+flush-179:010:25:151
4189824999689,5cyclictest23512-21kworker/u8:1+events_unbound08:50:141
4189824999687,7cyclictest23512-21kworker/u8:1+flush-179:009:15:191
4189823999682,10cyclictest49258-21apt-get09:55:000
4189824999589,4cyclictest68866-21kworker/u8:0+events_unbound11:45:181
4189823999584,9cyclictest46067-21kworker/u8:0+flush-179:010:00:210
4189824999488,4cyclictest97768-21kworker/u8:1+flush-179:012:30:201
4189824999487,5cyclictest68866-21kworker/u8:0+flush-179:011:15:151
4189824999386,5cyclictest4188281-21kworker/u8:1+flush-179:007:20:211
4189823999382,8cyclictest1213033-21systemd-journal11:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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