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2026-05-02 - 06:12
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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 Sat May 02, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2115413999280,9cyclictest1213033-21systemd-journal23:15:010
2115417999078,8cyclictest2209484-40mandb00:00:011
2115413998880,5cyclictest2132851-21kworker/u8:1+events_unbound20:20:230
2115413998880,5cyclictest2132851-21kworker/u8:1+events_unbound20:20:230
2115413998676,7cyclictest2168869-21latency_hist21:55:010
2115417998476,6cyclictest2170477-21latency_hist22:00:011
2115417998475,6cyclictest2144473-21latency_hist20:40:011
2115417998373,8cyclictest2184846-21kworker/u8:3+flush-179:022:55:011
2115413998375,5cyclictest2154580-21kworker/u8:1+flush-179:021:35:220
2115413998275,5cyclictest2144983-21kworker/u8:0+flush-179:020:49:560
2115413998072,5cyclictest2183453-21kworker/u8:2+events_unbound22:50:010
2115413998072,5cyclictest2183453-21kworker/u8:2+events_unbound22:50:000
2115413997972,4cyclictest2209427-21kworker/u8:0+events_unbound00:15:010
2115417997770,5cyclictest2172066-21latency_hist22:05:011
2115417997565,7cyclictest2160914-21latency_hist21:30:011
2115413997469,3cyclictest2206317-21kworker/u8:1+flush-179:023:51:070
2115413997466,6cyclictest2142879-21latency_hist20:35:020
2115417997264,6cyclictest2176837-21latency_hist22:20:021
2115413997266,4cyclictest2209427-21kworker/u8:0+events_unbound00:00:010
2115417997059,9cyclictest2196728-21apt-get23:20:111
2115413997062,5cyclictest2152960-21latency_hist21:05:010
2115413996962,4cyclictest2121703-21kworker/u8:1+flush-179:019:40:190
2115413996958,9cyclictest2188105-21store22:55:010
2115413996862,4cyclictest2184846-21kworker/u8:3+flush-179:023:25:160
2115413996854,10cyclictest1213033-21systemd-journal22:25:000
2115413996854,10cyclictest1213033-21systemd-journal22:24:590
2115413996761,4cyclictest2118540-21kworker/u8:3+flush-179:019:45:300
2115413996756,9cyclictest2134433-21http20:10:000
2115417996651,12cyclictest2132851-21kworker/u8:1+events_unbound20:20:011
2115413996661,3cyclictest2114723-21kworker/u8:1+flush-179:019:15:150
2115413996658,6cyclictest2152933-21kworker/u8:2+events_unbound21:10:000
2115413996561,3cyclictest2218810-21kworker/u8:3+flush-179:000:34:550
2115413996557,6cyclictest2167261-21kworker/u8:0+flush-179:022:00:010
2115413996556,6cyclictest2128055-21kworker/u8:2+events_unbound20:15:230
2115413996457,4cyclictest2173674-21kworker/u8:0+events_unbound23:15:250
2115413996455,6cyclictest2209427-21kworker/u8:0+flush-179:000:05:270
2115417996354,6cyclictest2126448-21latency_hist19:45:021
2115413996357,4cyclictest2184846-21kworker/u8:3+events_unbound23:30:020
2115413996356,5cyclictest2221160-21kworker/u8:0+flush-179:000:35:190
2115413996353,8cyclictest2134918-21apt-get20:10:110
211542099620,60cyclictest0-21swapper/221:51:592
2115417996242,17cyclictest2173674-21kworker/u8:0+flush-179:022:29:591
2115413996254,5cyclictest2115270-21latency_hist19:10:020
2115417996151,7cyclictest2159327-21latency_hist21:25:011
2115413996156,4cyclictest2169535-21kworker/u8:4+flush-179:022:09:550
2115413996151,4cyclictest2173674-21kworker/u8:0+flush-179:023:05:000
2115420996057,2cyclictest0-21swapper/223:01:002
2115413996055,3cyclictest2160960-21kworker/u8:0+flush-179:021:35:010
2115413996053,5cyclictest2152933-21kworker/u8:2+flush-179:021:44:590
2115413995853,4cyclictest2118540-21kworker/u8:3+flush-179:019:34:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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