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2026-06-04 - 07:53
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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 Thu Jun 04, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
84127499125115,7cyclictest915716-21kworker/u8:2+flush-179:000:04:000
8412749911298,11cyclictest855037-21latency_hist20:20:020
8412749911298,11cyclictest855037-21latency_hist20:20:010
8412759910892,12cyclictest1213033-21systemd-journal20:15:011
8412749910697,7cyclictest1213033-21systemd-journal21:35:000
8412759910377,23cyclictest887911-21latency_hist22:25:001
8412759910293,6cyclictest856885-21latency_hist20:25:021
8412749910189,9cyclictest930378-21latency_hist00:35:000
841274999987,10cyclictest1213033-21systemd-journal23:50:000
841275999890,5cyclictest866168-21latency_hist21:15:021
841274999787,7cyclictest876247-21latency_hist21:50:000
841274999383,8cyclictest844958-21latency_hist19:30:010
841275999068,19cyclictest857403-21apt-get20:30:071
841274999078,10cyclictest884971-21apt-get22:15:130
841274998978,9cyclictest1213033-21systemd-journal22:15:010
841274998776,6cyclictest854990-21kworker/u8:2+flush-179:020:20:170
841274998674,10cyclictest928546-21apt-get00:30:000
841275998474,7cyclictest860865-21latency_hist20:50:011
841274998462,20cyclictest1213033-21systemd-journal22:10:000
841274998272,8cyclictest1213033-21systemd-journal00:00:010
841275998175,4cyclictest902532-21kworker/u8:2+flush-179:023:20:251
841274998073,5cyclictest850777-21latency_hist19:55:010
841274997973,4cyclictest820055-21kworker/u8:1+flush-179:019:14:560
841274997870,5cyclictest881321-21kworker/u8:3+flush-179:022:25:140
841274997870,5cyclictest878874-21kworker/u8:0+events_unbound22:00:020
841275997771,4cyclictest866404-21kworker/u8:1+flush-179:021:45:011
841274997771,4cyclictest902532-21kworker/u8:2+events_unbound23:20:230
841274997770,5cyclictest892648-21kworker/u8:0+flush-179:022:45:000
841275997566,7cyclictest862989-21apt-get21:00:081
841274997567,6cyclictest895895-21kworker/u8:3+flush-179:023:35:220
841274997564,8cyclictest917070-21latency_hist23:55:010
841275997467,5cyclictest851066-21latency_hist20:00:021
841275997464,8cyclictest913927-21kworker/u8:1+flush-179:000:10:191
841275997459,13cyclictest843061-21kworker/u8:4+flush-179:019:35:011
841275997449,22cyclictest1213033-21systemd-journal23:59:391
841274997363,7cyclictest895852-21kworker/u8:2+flush-179:023:00:210
841275997264,6cyclictest930714-21gpgv00:35:011
841275997166,4cyclictest854990-21kworker/u8:2+flush-179:021:37:361
841274997164,5cyclictest849168-21kworker/u8:1+flush-179:020:00:120
841274997061,6cyclictest846790-21kworker/u8:0+flush-179:019:40:180
841275996957,10cyclictest879954-21apt-get22:00:111
841274996863,4cyclictest854990-21kworker/u8:2+flush-179:022:20:220
841274996837,1cyclictest0-21swapper/023:30:590
841274996837,1cyclictest0-21swapper/023:30:590
841275996759,6cyclictest880708-21kworker/u8:1+flush-179:022:10:161
841275996758,6cyclictest874404-21latency_hist21:45:001
841275996756,9cyclictest1213033-21systemd-journal19:40:001
841274996760,5cyclictest915716-21kworker/u8:2+flush-179:000:05:240
841274996661,4cyclictest866404-21kworker/u8:1+flush-179:021:40:200
841274996661,3cyclictest854990-21kworker/u8:2+flush-179:021:04:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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