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2026-06-10 - 14:59
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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 Wed Jun 10, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
43599799122111,9cyclictest1997095-21cups-browsed00:00:011
43599799115101,11cyclictest510-21rs:main1
43599799114104,7cyclictest526883-21latency_hist23:50:011
4359969910599,4cyclictest455565-21kworker/u8:3+flush-179:020:20:240
4359979910378,21cyclictest1213033-21systemd-journal21:25:011
4359969910188,10cyclictest1213033-21systemd-journal20:30:270
4359969910089,8cyclictest1213033-21systemd-journal20:00:010
435997999987,10cyclictest439081-21apt-get19:20:041
435997999587,6cyclictest517322-21latency_hist23:20:011
435996999382,9cyclictest1213033-21systemd-journal22:45:010
435996999285,5cyclictest488128-21kworker/u8:3+flush-179:021:55:280
435996999283,6cyclictest444137-21kworker/u8:1+flush-179:019:40:240
435996999081,6cyclictest536513-21kworker/u8:2+flush-179:000:35:140
435997998982,5cyclictest539742-21apt-get00:30:001
435997998979,8cyclictest498224-21apt-get22:20:121
435996998780,5cyclictest489716-21kworker/u8:1+flush-179:022:05:010
435996998677,6cyclictest457362-21latency_hist20:15:000
435996998676,8cyclictest540245-21apt-get00:30:120
435996998676,7cyclictest461598-21kworker/u8:1+flush-179:020:35:230
435996998580,4cyclictest502063-21kworker/u8:2+flush-179:023:35:160
435997998376,4cyclictest502063-21kworker/u8:2+flush-179:023:10:141
435997998375,5cyclictest466963-21kworker/u8:2+flush-179:021:15:251
435997998375,5cyclictest466909-21kworker/u8:0+flush-179:020:45:231
435997998373,7cyclictest1213033-21systemd-journal21:00:001
435997998274,6cyclictest502063-21kworker/u8:2+flush-179:000:05:261
435997998175,4cyclictest543183-21latency_hist00:40:001
435996998075,4cyclictest516718-21kworker/u8:0+flush-179:023:24:550
435996998075,4cyclictest516718-21kworker/u8:0+flush-179:023:24:550
435996998072,6cyclictest523948-21kworker/u8:0+flush-179:023:40:210
435996997973,4cyclictest502063-21kworker/u8:2+events_unbound00:10:010
435996997973,4cyclictest435901-21kworker/u8:3+flush-179:019:20:230
435996997970,7cyclictest444137-21kworker/u8:1+flush-179:019:50:210
435996997769,6cyclictest502063-21kworker/u8:2+events_unbound23:25:160
435997997671,4cyclictest502063-21kworker/u8:2+flush-179:023:34:551
435997997667,7cyclictest488128-21kworker/u8:3+flush-179:022:00:201
435996997669,5cyclictest498227-21kworker/u8:0+flush-179:022:55:180
435996997669,5cyclictest435901-21kworker/u8:3+flush-179:019:25:180
435996997669,5cyclictest435901-21kworker/u8:3+flush-179:019:25:170
435997997568,5cyclictest502063-21kworker/u8:2+flush-179:022:55:011
435997997568,5cyclictest444137-21kworker/u8:1+flush-179:019:40:221
435996997569,4cyclictest442503-21kworker/u8:0+flush-179:019:35:180
435997997367,5cyclictest502063-21kworker/u8:2+events_unbound00:00:241
435996997365,6cyclictest517298-21kworker/u8:1+events_unbound00:20:000
435997997267,4cyclictest516718-21kworker/u8:0+flush-179:023:20:251
435997997267,4cyclictest516718-21kworker/u8:0+flush-179:023:20:251
435997997267,3cyclictest481809-21kworker/u8:1+flush-179:021:35:161
435997997265,5cyclictest527140-21apt-get23:50:121
435997997265,5cyclictest431387-21kworker/u8:2+flush-179:019:30:011
435997997265,5cyclictest431387-21kworker/u8:2+flush-179:019:30:011
435996997265,5cyclictest501401-21latency_hist22:30:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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