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2025-11-25 - 10:42
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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 Nov 25, 2025 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
376925999381,10cyclictest391125-21latency_hist19:55:010
376925999286,4cyclictest381575-21kworker/u8:1+events_unbound19:55:000
376928999181,7cyclictest429017-21latency_hist21:50:001
376925998983,4cyclictest478102-21kworker/u8:0+flush-179:000:30:260
376928998574,8cyclictest425597-21latency_hist21:40:021
376928998356,16cyclictest468484-21/usr/sbin/munin23:50:241
376925998373,6cyclictest461604-21kworker/u8:1+events_unbound23:30:250
376925998274,5cyclictest381625-21kworker/u8:2+flush-179:019:40:260
376928998143,27cyclictest467988-21latency_hist23:50:001
376925997871,5cyclictest381625-21kworker/u8:2+flush-179:019:45:240
376928997766,9cyclictest432201-21latency_hist22:00:011
376925997768,6cyclictest417360-21latency_hist21:15:000
376925997666,7cyclictest477861-21latency_hist00:20:010
37692599761,74cyclictest1-21systemd23:20:000
376925997566,6cyclictest442030-21kworker/u8:4+events_unbound23:05:200
376925997460,10cyclictest271-21systemd-journal21:35:210
376925997265,5cyclictest396466-21kworker/u8:2+flush-179:020:25:000
376928997061,7cyclictest407567-21latency_hist20:45:011
376925997062,6cyclictest434296-21kworker/u8:0+events_unbound22:25:240
376928996964,4cyclictest373755-21kworker/u8:0+flush-179:019:20:011
376928996959,7cyclictest484226-21latency_hist00:40:011
376925996959,7cyclictest446789-21latency_hist22:45:000
376925996957,9cyclictest409151-21latency_hist20:50:010
4670791680,18ptp4l441ktimers/319:06:183
376925996863,4cyclictest411030-21kworker/u8:3+flush-179:020:55:230
376925996862,4cyclictest463192-21kworker/u8:0+flush-179:000:05:010
376925996858,8cyclictest438833-21latency_hist22:20:010
376925996760,5cyclictest381575-21kworker/u8:1+flush-179:020:00:250
376925996661,3cyclictest402822-21kworker/u8:3+events_unbound20:35:230
376925996657,6cyclictest478102-21kworker/u8:0+flush-179:000:25:160
376925996657,6cyclictest434296-21kworker/u8:0+flush-179:022:05:200
376925996657,5cyclictest415752-21kworker/u8:1+events_unbound21:45:020
376928996556,6cyclictest433813-21apt-get22:05:001
376928996553,9cyclictest418954-21latency_hist21:20:021
376925996559,5cyclictest442030-21kworker/u8:4+flush-179:023:00:240
376925996558,5cyclictest464853-21kworker/u8:2+events_unbound23:45:250
376925996556,7cyclictest448374-21latency_hist22:50:010
376925996555,7cyclictest466405-21latency_hist23:45:010
37692599650,3cyclictest191rcuc/021:53:590
376925996453,9cyclictest380261-21apt-get19:20:110
376928996357,4cyclictest398261-21apt-get20:15:141
376925996357,4cyclictest381575-21kworker/u8:1+events_unbound20:15:010
376928996253,7cyclictest381575-21kworker/u8:1+flush-179:020:25:251
376925996257,4cyclictest723-21Xorg20:27:590
376928996050,8cyclictest479450-21latency_hist00:25:011
376928996050,7cyclictest445183-21latency_hist22:40:001
376928996047,10cyclictest271-21systemd-journal23:25:011
376925996053,5cyclictest399601-21kworker/u8:0+events_unbound21:05:010
376925996053,4cyclictest415752-21kworker/u8:1+flush-179:021:30:150
376928995949,7cyclictest430603-21latency_hist21:55:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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