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2026-04-07 - 09:15
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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 Apr 07, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41819679910996,10cyclictest266-21systemd-journal20:25:000
4181969999974,22cyclictest88272-21latency_hist00:20:011
4181967999587,6cyclictest67229-21latency_hist23:15:020
4181967999284,6cyclictest81807-40logrotate00:00:000
4181967999284,6cyclictest81807-40logrotate00:00:000
4181967999081,6cyclictest31489-21kworker/u8:3+flush-179:021:45:140
4181969998983,5cyclictest624-21kworker/u8:1+events_unbound20:00:001
4181969998680,4cyclictest47653-21kworker/u8:2+flush-179:022:20:251
4181967998273,6cyclictest17132-21latency_hist20:40:000
4181967998175,4cyclictest4191429-21latency_hist19:40:010
4181967998172,6cyclictest2251-21latency_hist19:55:010
4181967997869,7cyclictest57192-21apt-get22:45:000
4181967997769,6cyclictest55563-21kworker/u8:2+flush-179:023:00:010
4181967997766,9cyclictest510-21rs:main0
4181969997670,4cyclictest23738-21kworker/u8:0+flush-179:021:20:251
4181967997569,4cyclictest25631-21kworker/u8:3+flush-179:021:05:170
4181967997465,7cyclictest4192485-21kworker/u8:3+flush-179:020:05:170
4181969997266,4cyclictest67244-21kworker/u8:2+flush-179:023:35:221
4181969997157,12cyclictest31489-21kworker/u8:3+flush-179:022:05:011
4181967997164,5cyclictest59278-21apt-get22:50:120
4181967997162,7cyclictest93013-21latency_hist00:35:010
4181969997065,3cyclictest77285-21kworker/u8:0+flush-179:000:00:091
4181969997057,11cyclictest266-21systemd-journal00:35:141
4181969997056,12cyclictest4192485-21kworker/u8:3+events_unbound20:05:011
4181967997063,5cyclictest4183693-21kworker/u8:2+flush-179:019:15:210
4181967997058,10cyclictest44439-21apt-get22:05:130
4181967996962,4cyclictest89874-21kworker/u8:2+flush-179:000:35:190
4181967996961,6cyclictest55582-21latency_hist22:40:020
4181967996859,6cyclictest45155-21kworker/u8:1+flush-179:022:15:200
4181967996760,5cyclictest82102-21apt-get00:00:120
4181967996760,5cyclictest4192485-21kworker/u8:3+flush-179:020:15:210
4181969996659,5cyclictest67244-21kworker/u8:2+flush-179:000:10:001
4181969996659,5cyclictest67244-21kworker/u8:2+flush-179:000:10:001
4181969996659,5cyclictest31489-21kworker/u8:3+flush-179:021:30:211
4181969996658,6cyclictest65646-21latency_hist23:10:011
4181967996660,4cyclictest5769-21kworker/u8:2+flush-179:021:00:260
4181967996658,5cyclictest15510-21kworker/u8:3+flush-179:020:45:170
4181969996558,5cyclictest89874-21kworker/u8:2+flush-179:000:30:141
4181967996458,4cyclictest23738-21kworker/u8:0+flush-179:021:15:170
4181967996454,8cyclictest75720-21apt-get23:40:100
4181967996356,5cyclictest4181846-21latency_hist19:10:020
4181967996355,5cyclictest67244-21kworker/u8:2+flush-179:023:35:240
4181969996256,5cyclictest23738-21kworker/u8:0+flush-179:021:20:011
4181969996256,4cyclictest34662-21kworker/u8:0+events_unbound21:35:181
4181967996253,7cyclictest31489-21kworker/u8:3+flush-179:021:25:210
4181967996154,5cyclictest34662-21kworker/u8:0+flush-179:021:35:190
4181969995951,6cyclictest510-21rs:main1
4181967995953,4cyclictest86687-21kworker/u8:3+flush-179:000:15:150
4181969995852,5cyclictest45155-21kworker/u8:1+flush-179:022:05:231
4181969995851,5cyclictest14200-21apt-get20:30:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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