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2025-06-17 - 02:03
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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 16, 2025 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
410965499121107,11cyclictest4170084-21apt-get10:15:140
410965499115105,8cyclictest22864-21latency_hist12:40:010
410965699114101,10cyclictest4144953-21dpkg08:56:041
410965499113101,9cyclictest502-21rs:main0
410965699112101,9cyclictest4177785-21apt-get10:40:001
41096549911298,10cyclictest4174865-21apt-get10:30:150
41096549910190,8cyclictest4132120-21latency_hist08:20:000
41096549910086,10cyclictest3500-21apt-get11:40:160
4109654999986,10cyclictest16750-21apt-get12:20:130
4109656999785,8cyclictest4109506-21kworker/u8:1+events_unbound07:15:011
4109656999383,7cyclictest4160290-21apt-get09:45:111
4109656999380,10cyclictest4158703-21apt-get09:40:131
4109656999082,6cyclictest8268-21apt-get11:54:591
4109656998877,9cyclictest4171694-21apt-get10:20:151
4109656998674,8cyclictest4138740-21kworker/u8:2+events_unbound09:05:011
4109656998674,8cyclictest4138740-21kworker/u8:2+events_unbound09:05:011
4109654998676,7cyclictest4177800-21latency_hist10:40:000
4109656998575,7cyclictest3105085-21systemd-journal10:15:001
4109656998575,7cyclictest3105085-21systemd-journal10:15:001
4109654998575,7cyclictest4109576-21kworker/u8:3+events_unbound07:15:030
4109656998474,7cyclictest3105085-21systemd-journal11:40:001
4109656998469,12cyclictest4166916-21apt-get10:05:131
4109654998474,6cyclictest4153704-21kworker/u8:2+flush-179:009:40:150
4109654998473,8cyclictest4133958-21/usr/sbin/munin08:25:240
4109656998277,4cyclictest4109576-21kworker/u8:3+events_unbound07:40:141
4109656998274,5cyclictest4135563-21apt-get08:30:131
4109656998271,8cyclictest3255707-21kworker/u8:0+events_unbound07:20:171
4109656998172,6cyclictest4171450-21kworker/u8:1+flush-179:010:25:191
4109656998163,15cyclictest3105085-21systemd-journal08:21:341
4109654998169,9cyclictest4186267-21apt-get11:05:130
4109656998067,10cyclictest4164800-21latency_hist10:00:011
4109654998067,10cyclictest4127607-21apt-get08:05:130
4109656997969,8cyclictest6546-21store11:50:021
4109656997969,7cyclictest4129194-21apt-get08:10:141
4109654997867,8cyclictest10141-21latency_hist12:00:010
410965499781,73cyclictest3276-21true11:40:000
4109654997768,6cyclictest4116214-21kworker/u8:1+flush-179:007:30:150
4109656997667,7cyclictest4153669-21latency_hist09:25:011
4109656997662,11cyclictest3105085-21systemd-journal11:58:351
4109654997669,5cyclictest8392-21kworker/u8:2+events_unbound12:00:180
4109656997567,6cyclictest8392-21kworker/u8:2+flush-179:012:10:251
4109656997566,7cyclictest4143263-21latency_hist08:55:011
4109656997466,6cyclictest4122605-21kworker/u8:2+events_unbound08:00:151
4109654997466,5cyclictest4148663-21kworker/u8:3+flush-179:009:20:010
4109654997267,3cyclictest4176191-21kworker/u8:4+flush-179:010:55:230
4109656997163,6cyclictest3105085-21systemd-journal07:59:341
4109656997161,8cyclictest4166659-21latency_hist10:05:011
4109654997145,23cyclictest4168243-21latency_hist10:10:010
4109654997057,10cyclictest4181486-21apt-get10:50:150
4109660996941,26cyclictest0-21swapper/309:11:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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