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2026-04-24 - 01:42
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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 Apr 23, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
369415099125115,8cyclictest3714327-21kworker/u8:1+flush-179:008:20:010
369415099125115,8cyclictest3714327-21kworker/u8:1+flush-179:008:20:010
36941509910796,8cyclictest3737535-21kworker/u8:1+flush-179:009:30:010
36941529910595,6cyclictest3699035-21kworker/u8:0+flush-179:007:40:001
3694152999679,15cyclictest3714327-21kworker/u8:1+flush-179:008:15:251
3694152999679,15cyclictest3714327-21kworker/u8:1+flush-179:008:15:251
3694152999386,5cyclictest3776518-21kworker/u8:0+flush-179:011:40:151
3694150999280,10cyclictest3755315-21apt-get10:20:010
3694150999280,10cyclictest3755315-21apt-get10:20:010
3694152999181,7cyclictest3742316-21latency_hist09:40:021
3694152998174,5cyclictest3739175-21kworker/u8:3+flush-179:010:05:241
3694150998070,8cyclictest3690704-21kworker/u8:2+flush-179:007:25:010
3694150997872,4cyclictest3693414-21kworker/u8:3+flush-179:007:40:160
3694152997768,7cyclictest1213033-21systemd-journal10:30:001
3694150997770,5cyclictest3765366-21kworker/u8:2+events_unbound11:35:140
3694150997670,4cyclictest3699035-21kworker/u8:0+flush-179:007:30:000
3694150997667,6cyclictest3765387-21latency_hist10:50:020
3694152997567,6cyclictest3789276-21latency_hist12:05:001
3694152997461,11cyclictest1213033-21systemd-journal10:04:591
3694152997458,14cyclictest3737535-21kworker/u8:1+flush-179:009:30:261
3694152997365,5cyclictest3699035-21kworker/u8:0+flush-179:007:45:141
3694150997367,4cyclictest3731158-21kworker/u8:2+flush-179:009:20:170
3694150997366,5cyclictest3726635-21kworker/u8:0+flush-179:009:00:200
3694152997261,9cyclictest1213033-21systemd-journal09:20:001
3694152997163,6cyclictest3776518-21kworker/u8:0+flush-179:011:30:001
3694152997162,6cyclictest3723194-21kworker/u8:0+flush-179:008:40:221
3694150997163,6cyclictest3765366-21kworker/u8:2+events_unbound11:15:230
3694152997045,7cyclictest3721617-21latency_hist08:35:011
3694150996962,5cyclictest3720009-21kworker/u8:2+events_unbound08:50:010
3694152996861,5cyclictest3727060-21kworker/u8:3+flush-179:008:55:151
3694152996855,10cyclictest1213033-21systemd-journal11:55:011
3694152996762,4cyclictest3690704-21kworker/u8:2+flush-179:007:15:261
3694152996658,5cyclictest3790908-21kworker/u8:1+flush-179:012:15:221
3694152996653,10cyclictest3748706-21apt-get10:00:011
3694152996653,10cyclictest3748706-21apt-get10:00:011
3694150996658,6cyclictest3727060-21kworker/u8:3+flush-179:008:50:240
3694152996552,5cyclictest3739175-21kworker/u8:3+flush-179:009:49:591
3694150996562,2cyclictest0-21swapper/007:18:590
3694150996561,3cyclictest3699035-21kworker/u8:0+flush-179:007:49:550
3694150996560,4cyclictest3752383-21kworker/u8:1+flush-179:010:30:210
3694150996556,7cyclictest3771994-21/usr/sbin/munin11:10:220
3694152996456,6cyclictest3699035-21kworker/u8:0+events_unbound07:55:141
3694150996454,8cyclictest3760861-21apt-get10:35:090
3694150996452,10cyclictest3718477-21true08:25:000
3694152996356,5cyclictest3713917-21apt-get08:10:111
3694152996355,5cyclictest3784528-21kworker/u8:3+events_unbound12:30:231
3694150996358,4cyclictest3765366-21kworker/u8:2+events_unbound11:25:230
3694150996358,4cyclictest3714327-21kworker/u8:1+flush-179:008:39:550
3694150996357,4cyclictest3739175-21kworker/u8:3+flush-179:010:05:150
3694150996356,5cyclictest3784528-21kworker/u8:3+flush-179:012:30:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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