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2026-08-07 - 07:03
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Fri Aug 07, 2026 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
325915521060,2sleep20-21swapper/221:35:452
3068103992522,2cyclictest268-21systemd-journal22:45:011
3240591240,5phc2sys0-21swapper/300:10:183
3068102992312,6cyclictest0-21swapper/022:10:420
3068104992219,1cyclictest0-21swapper/223:55:002
3068104992219,1cyclictest0-21swapper/219:45:012
3068103992218,3cyclictest70-21kcompactd023:35:021
3068102992219,2cyclictest3461463-21latency_hist23:55:000
3068102992212,5cyclictest0-21swapper/000:20:010
306810499212,9cyclictest0-21swapper/222:50:202
3068103992118,2cyclictest3461533-21apt-key23:55:001
3068103992113,3cyclictest3441405-21kthreadcore23:40:411
3068102992118,2cyclictest3328044-21apt-get22:25:010
3068102992110,6cyclictest0-21swapper/022:40:020
3068103992017,2cyclictest664-21dbus-daemon21:50:011
3068103992017,2cyclictest3258044-21kthreadcore21:35:421
3068103992011,7cyclictest0-21swapper/119:30:011
306810299209,6cyclictest0-21swapper/023:45:010
3068102992017,2cyclictest664-21dbus-daemon21:00:020
3068102992017,2cyclictest3119385-21apt19:50:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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