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2025-07-12 - 11:08
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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 Jul 12, 2025 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210993199131119,5cyclictest2204742-21kworker/u8:1+events_unbound00:04:020
210993199111105,5cyclictest2135585-21kworker/u8:0+events_unbound20:30:020
21099339910289,10cyclictest2203151-40logrotate00:00:011
21099339910289,10cyclictest2203151-40logrotate00:00:011
21099319910095,4cyclictest2186947-21kworker/u8:0+events_unbound23:10:280
2109933999889,6cyclictest2119420-21kworker/u8:2+events_unbound19:45:291
2109933999889,6cyclictest2119420-21kworker/u8:2+events_unbound19:45:281
2109931999686,8cyclictest2207961-21latency_hist00:15:010
2109933999584,8cyclictest2121197-21kworker/u8:1+flush-179:020:00:001
2109933999584,4cyclictest2174276-21kworker/u8:2+events_unbound22:30:151
2109933999486,6cyclictest2109827-21kworker/u8:0+events_unbound19:25:251
2109933999486,6cyclictest2109827-21kworker/u8:0+events_unbound19:20:001
2109933999385,5cyclictest2211199-21kworker/u8:2+flush-179:000:30:231
2109933999181,4cyclictest2165483-21kworker/u8:0+events_unbound22:15:291
2109931999185,4cyclictest2156770-21kworker/u8:2+flush-179:021:35:230
2109933999083,5cyclictest2190126-21kworker/u8:3+events_unbound23:25:131
2109933999081,7cyclictest3105085-21systemd-journal20:45:011
2109933999077,10cyclictest2150361-21apt-get21:15:131
2109931999085,4cyclictest2179063-21kworker/u8:3+events_unbound22:50:190
2109931999085,4cyclictest2109827-21kworker/u8:0+events_unbound19:10:240
2109931999081,6cyclictest2190126-21kworker/u8:3+events_unbound23:25:190
2109931998978,9cyclictest2195435-21apt-get23:35:160
2109931998884,3cyclictest2135589-21kworker/u8:1+events_unbound21:20:280
2109931998876,10cyclictest2130930-21cat20:15:020
2109931998876,10cyclictest2113266-21apt-get19:20:090
2109933998781,4cyclictest2109827-21kworker/u8:0+events_unbound19:20:131
2109933998777,8cyclictest2174276-21kworker/u8:2+events_unbound23:00:191
2109933998775,6cyclictest2195160-21kworker/u8:2+events_unbound23:45:011
2109933998774,5cyclictest2179063-21kworker/u8:3+events_unbound22:50:241
2109931998776,8cyclictest2151704-21latency_hist21:20:020
2109933998676,8cyclictest2184458-21kworker/u8:1+flush-179:023:15:001
2109933998676,8cyclictest2183797-21latency_hist23:00:011
2109933998675,8cyclictest2124130-21latency_hist19:55:011
2109933998674,6cyclictest2133934-21kworker/u8:2+events_unbound20:25:241
2109933998574,8cyclictest2212741-21latency_hist00:30:001
2109931998581,3cyclictest2172060-21kworker/u8:3+events_unbound22:25:230
2109933998472,9cyclictest2130619-21gpgv20:15:021
2109931998479,4cyclictest2148565-21kworker/u8:0+flush-179:021:25:280
2109931998472,10cyclictest2122800-21apt-get19:50:120
2109933998378,3cyclictest2143787-21kworker/u8:3+flush-179:021:20:251
2109933998372,8cyclictest2159905-21kworker/u8:1+flush-179:021:45:221
2109931998375,6cyclictest2106841-21kworker/u8:3+events_unbound20:25:190
2109931998371,10cyclictest2139243-21apt-get20:40:130
2109933998276,5cyclictest2143787-21kworker/u8:3+flush-179:021:05:241
2109933998276,4cyclictest2163133-21kworker/u8:1+flush-179:022:40:241
2109933998176,3cyclictest2190126-21kworker/u8:3+events_unbound23:35:281
2109933997968,9cyclictest2110071-21apt-get19:10:111
2109931997974,3cyclictest2156770-21kworker/u8:2+events_unbound21:40:150
2109931997968,4cyclictest2124164-21kworker/u8:0+events_unbound19:55:280
2109933997867,5cyclictest2199987-21kworker/u8:3+events_unbound00:15:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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