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2026-05-30 - 08:27
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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 May 30, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
389968599118114,3cyclictest3985013-21kworker/u8:1+events_unbound00:04:010
389968799112101,8cyclictest3921870-21latency_hist20:20:011
38996859910898,7cyclictest3955824-21latency_hist22:05:000
38996879910796,8cyclictest3957410-21latency_hist22:10:021
38996859910692,10cyclictest1213033-21systemd-journal23:30:150
389968599106101,4cyclictest3957445-21kworker/u8:2+events_unbound22:20:240
38996859910388,11cyclictest3939637-21latency_hist21:15:000
38996859910196,4cyclictest3992990-21kworker/u8:3+flush-179:000:20:010
38996859910196,4cyclictest3970433-21kworker/u8:3+flush-179:022:55:230
3899687999892,4cyclictest3928733-21kworker/u8:0+flush-179:021:05:251
3899685999691,4cyclictest3899606-21kworker/u8:2+flush-179:019:20:210
3899685999489,3cyclictest3985013-21kworker/u8:1+flush-179:000:05:150
3899685999387,4cyclictest3904360-21kworker/u8:0+events_unbound19:35:240
3899685999086,3cyclictest3985013-21kworker/u8:1+flush-179:000:35:240
3899685998985,3cyclictest3951080-21kworker/u8:0+events_unbound22:25:130
3899685998984,4cyclictest3985013-21kworker/u8:1+flush-179:000:30:230
3899685998880,3cyclictest3979924-21kworker/u8:0+events_unbound23:45:230
3899687998780,6cyclictest3970433-21kworker/u8:3+flush-179:022:50:001
3899687998778,6cyclictest3943128-21kworker/u8:3+flush-179:021:30:001
3899685998682,3cyclictest3943125-21kworker/u8:1+events_unbound21:45:230
3899685998682,3cyclictest3931728-21kworker/u8:3+events_unbound20:50:230
3899685998682,3cyclictest3910209-21kworker/u8:1+events_unbound19:50:150
3899685998680,4cyclictest3928733-21kworker/u8:0+flush-179:020:55:160
3899685998678,5cyclictest3917890-21kworker/u8:1+events_unbound20:35:010
3899687998566,16cyclictest3904360-21kworker/u8:0+flush-179:019:25:151
3899685998580,4cyclictest3965608-21kworker/u8:2+flush-179:023:25:250
3899687998474,8cyclictest3982041-21kworker/u8:3+events_unbound23:40:001
3899687998373,5cyclictest3904360-21kworker/u8:0+flush-179:019:50:011
3899685998372,8cyclictest510-21rs:main0
3899685998278,3cyclictest3955859-21kworker/u8:3+events_unbound22:09:560
3899685998277,4cyclictest3943128-21kworker/u8:3+flush-179:021:35:250
3899685998176,4cyclictest3962223-21kworker/u8:1+flush-179:022:30:140
3899685998175,4cyclictest3917890-21kworker/u8:1+events_unbound20:40:210
3899685998173,6cyclictest3975436-21apt-get23:05:130
3899685998173,5cyclictest3907576-21kworker/u8:4+events_unbound19:40:140
3899687998074,4cyclictest3913892-21kworker/u8:2+flush-179:020:00:001
3899687997966,12cyclictest3989759-21kworker/u8:2+events_unbound23:50:011
389968799791,74cyclictest1-21systemd22:33:131
3899685997974,3cyclictest3921288-21kworker/u8:0+events_unbound20:20:150
3899685997974,3cyclictest3898572-21kworker/u8:1+events_unbound19:10:200
3899685997973,4cyclictest3910209-21kworker/u8:1+events_unbound19:55:160
3899685997968,7cyclictest3968814-21latency_hist22:45:000
3899685997873,4cyclictest3979924-21kworker/u8:0+flush-179:023:35:210
3899685997868,7cyclictest3899565-21latency_hist19:10:010
3899685997771,4cyclictest3893515-21kworker/u8:0+flush-179:019:15:190
3899687997566,7cyclictest3951080-21kworker/u8:0+events_unbound22:25:221
3899687997535,34cyclictest714-21Xorg00:08:591
3899687997467,4cyclictest3931663-21kworker/u8:2+events_unbound21:35:011
3899685997470,3cyclictest3921288-21kworker/u8:0+events_unbound20:30:130
3899685997469,3cyclictest3917890-21kworker/u8:1+events_unbound20:10:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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