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2026-04-15 - 00:59
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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 Tue Apr 14, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3861950998981,6cyclictest3907533-21latency_hist09:30:011
3861950998981,6cyclictest3907533-21latency_hist09:30:011
3861950998880,6cyclictest3879709-21latency_hist08:05:001
3861948997868,7cyclictest3929319-21kworker/u8:0+flush-179:010:50:000
3861956997664,10cyclictest3923505-21turbostat10:20:003
3861948997163,6cyclictest3904602-21/usr/sbin/munin09:20:240
3861950996859,7cyclictest266-21systemd-journal08:00:011
4577091670,14ptp4l431rcuc/307:10:003
3861948996759,6cyclictest3955573-21latency_hist12:00:010
3861950996659,5cyclictest3957170-21latency_hist12:05:001
3861948996554,9cyclictest266-21systemd-journal09:35:000
3861950996456,6cyclictest3958755-21latency_hist12:10:011
3861950996454,7cyclictest3896367-21/usr/sbin/munin08:55:251
3861950996352,9cyclictest3915739-21apt-get09:55:121
3861950996256,4cyclictest3936279-21kworker/u8:3+flush-179:011:40:261
3861948996256,5cyclictest3922726-21kworker/u8:1+flush-179:011:00:160
3861953996158,2cyclictest0-21swapper/207:57:582
3861950996153,6cyclictest3965122-21latency_hist12:30:011
3861950996153,6cyclictest3865027-21latency_hist07:20:021
3861948996052,6cyclictest3929319-21kworker/u8:0+flush-179:010:55:260
3861950995848,8cyclictest3925351-21apt-get10:25:111
3861948995851,5cyclictest3863659-21kworker/u8:0+flush-179:008:20:010
3861948995849,7cyclictest3946031-21latency_hist11:30:010
3861948995751,4cyclictest3934627-21latency_hist10:55:010
3861950995649,5cyclictest3871750-21latency_hist07:40:011
3861950995646,8cyclictest510-21rs:main1
3861950995639,16cyclictest0-21swapper/108:12:591
3861950995635,19cyclictest3963536-21latency_hist12:25:001
386195099561,6cyclictest3904380-21awk09:20:001
386195099560,2cyclictest0-21swapper/111:25:151
3861948995647,7cyclictest3878108-21latency_hist08:00:010
3861950995449,4cyclictest3941788-21kworker/u8:1+flush-179:011:20:281
3861950995446,6cyclictest3909377-21apt-get09:35:131
3861950995446,6cyclictest3892699-21latency_hist08:45:001
3861948995448,5cyclictest3908590-21kworker/u8:2+flush-179:009:50:220
3861948995445,7cyclictest3901425-21apt-get09:10:110
3861950995240,10cyclictest3900913-21apt-get09:10:001
3861948995246,5cyclictest3881524-21kworker/u8:3+flush-179:008:24:550
3861948995245,5cyclictest3894264-21kworker/u8:2+flush-179:008:55:000
3861948995244,6cyclictest266-21systemd-journal10:10:010
3861950995144,6cyclictest3941145-21store11:15:011
3861950995144,5cyclictest3866617-21latency_hist07:25:021
3861948995143,6cyclictest3865271-21/usr/sbin/munin07:20:170
3861948995134,14cyclictest714-21Xorg08:12:580
3861948995042,6cyclictest3894295-21apt-get08:50:000
3861950994941,7cyclictest266-21systemd-journal11:53:091
3861950994941,7cyclictest266-21systemd-journal11:53:081
386195099490,45cyclictest0-21swapper/108:50:131
3861948994939,8cyclictest3906205-21apt-get09:25:120
3861948994939,8cyclictest3906205-21apt-get09:25:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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