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2026-08-09 - 23:32
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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 Sun Aug 09, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
361054799150140,8cyclictest3688534-21cp23:10:000
361054799144134,7cyclictest3661094-21latency_hist21:45:010
361054799135122,10cyclictest1213033-21systemd-journal21:10:000
361054999130118,8cyclictest3710275-21kworker/u8:1+flush-179:000:15:021
361054999129120,7cyclictest3644636-21latency_hist20:55:011
361054799123108,12cyclictest3705022-40gzip00:00:020
361054799119108,9cyclictest3698472-21kworker/u8:0+flush-179:023:45:250
361054799116108,5cyclictest3696617-21kworker/u8:3+flush-179:023:40:190
361054999115106,6cyclictest3623420-21latency_hist19:50:011
361054799115104,9cyclictest510-21rs:main0
361054799115104,8cyclictest3626600-21latency_hist20:00:010
361054999114104,6cyclictest3657636-21latency_hist21:35:001
361054799113105,5cyclictest3635201-21kworker/u8:2+flush-179:020:45:210
361054999112106,4cyclictest3639865-21latency_hist20:40:021
361054799111102,6cyclictest3635201-21kworker/u8:2+flush-179:020:25:230
36105499911084,24cyclictest3652445-21kworker/u8:1+flush-179:021:25:011
361054799109101,5cyclictest3696617-21kworker/u8:3+flush-179:000:03:590
36105499910691,13cyclictest3595173-21kworker/u8:3+flush-179:020:00:241
361054999106100,4cyclictest3615240-21kworker/u8:1+flush-179:019:40:151
36105479910496,5cyclictest3595173-21kworker/u8:3+flush-179:020:30:180
36105479910494,8cyclictest3708368-21latency_hist00:10:010
36105499910395,5cyclictest3696617-21kworker/u8:3+flush-179:000:00:011
36105499910293,6cyclictest3643049-21latency_hist20:50:011
36105479910295,5cyclictest3666796-21kworker/u8:0+flush-179:022:30:220
36105479910293,7cyclictest3662924-21kworker/u8:3+flush-179:022:10:240
36105479910190,7cyclictest1-21systemd21:05:010
36105479910094,4cyclictest3690297-21kworker/u8:2+flush-179:023:15:220
36105479910092,6cyclictest3680443-21kworker/u8:0+events_unbound22:55:000
36105479910088,9cyclictest510-21rs:main0
3610549999990,7cyclictest3620234-21latency_hist19:40:011
3610547999991,6cyclictest3649453-21kworker/u8:0+flush-179:021:15:220
3610549999788,7cyclictest3680468-21latency_hist22:45:021
3610547999789,5cyclictest3622905-21kworker/u8:0+flush-179:020:05:170
3610549999584,8cyclictest3629791-21latency_hist20:10:011
3610549999572,20cyclictest3661607-21apt-get21:45:101
3610547999487,5cyclictest3666796-21kworker/u8:0+flush-179:022:35:260
3610549999382,5cyclictest3656094-21kworker/u8:0+events_unbound21:35:211
3610549999283,6cyclictest3687069-21/usr/sbin/munin23:05:241
3610549999282,7cyclictest1213033-21systemd-journal20:25:001
3610547999286,4cyclictest3595173-21kworker/u8:3+flush-179:020:20:220
3610547999284,6cyclictest3680443-21kworker/u8:0+flush-179:022:55:210
3610549999185,4cyclictest3682050-21latency_hist22:50:011
3610547999184,5cyclictest3656094-21kworker/u8:0+flush-179:021:50:180
3610549999082,6cyclictest3675937-21apt-get22:30:111
3610549999069,19cyclictest3649453-21kworker/u8:0+flush-179:021:19:591
3610547999083,6cyclictest3718423-21kworker/u8:2+events_unbound00:40:000
3610547999082,6cyclictest3615240-21kworker/u8:1+flush-179:019:45:230
3610549998983,4cyclictest3662924-21kworker/u8:3+flush-179:022:10:271
3610547998983,4cyclictest3710275-21kworker/u8:1+flush-179:000:20:170
3610547998983,4cyclictest3682035-21kworker/u8:1+events_unbound23:35:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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