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2026-04-12 - 01:29
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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 Apr 11, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4012801999383,8cyclictest4079851-21apt-get10:40:010
4012803999285,5cyclictest4038181-21kworker/u8:1+flush-179:010:00:011
4012803998175,4cyclictest4097762-21kworker/u8:0+flush-179:011:45:011
4012803997773,2cyclictest714-21Xorg11:52:591
4012803997771,5cyclictest4068710-21kworker/u8:2+flush-179:010:15:011
4012803997771,5cyclictest4068710-21kworker/u8:2+flush-179:010:15:001
4012803997565,6cyclictest4057608-21kworker/u8:3+flush-179:009:40:001
4012803997561,11cyclictest4097626-21latency_hist11:35:021
4012803997468,4cyclictest4038181-21kworker/u8:1+flush-179:008:45:201
4012801997465,7cyclictest4065518-21latency_hist09:55:000
4012803997267,4cyclictest4033450-21kworker/u8:3+events_unbound08:15:261
4012803997266,4cyclictest4057608-21kworker/u8:3+flush-179:010:00:161
4012803997265,5cyclictest4012744-21kworker/u8:0+flush-179:007:10:211
4012803997259,11cyclictest4038181-21kworker/u8:1+events_unbound09:00:141
4012803997164,5cyclictest4091301-21kworker/u8:3+events_unbound11:20:151
4012801997164,4cyclictest4023925-21kworker/u8:0+flush-179:007:55:210
4012801997163,5cyclictest4097762-21kworker/u8:0+flush-179:012:20:210
4012803997061,6cyclictest4010845-21kworker/u8:3+flush-179:007:25:201
4012803997051,17cyclictest4078245-21kworker/u8:2+flush-179:010:55:001
4012803996958,7cyclictest4012744-21kworker/u8:0+flush-179:007:15:211
4012803996835,31cyclictest714-21Xorg12:11:591
4012803996756,8cyclictest4072124-21/usr/sbin/munin10:15:231
4012803996663,2cyclictest0-21swapper/109:50:581
4012803996660,5cyclictest4071863-21kworker/u8:0+flush-179:010:20:241
4012803996660,4cyclictest266-21systemd-journal07:45:191
4012803996657,7cyclictest4097762-21kworker/u8:0+flush-179:012:20:001
4012801996657,7cyclictest4076670-21latency_hist10:30:010
4012801996653,10cyclictest266-21systemd-journal09:00:010
4012803996558,5cyclictest4015943-21kworker/u8:1+events_unbound08:10:011
4012803996357,4cyclictest4088321-21kworker/u8:1+flush-179:011:10:191
4012801996356,4cyclictest4038181-21kworker/u8:1+flush-179:008:50:160
4012801996353,8cyclictest4067381-21apt-get10:00:120
4012803996256,4cyclictest4050151-21kworker/u8:2+flush-179:009:10:011
4012801996258,3cyclictest4057608-21kworker/u8:3+flush-179:009:40:250
4012801996255,5cyclictest4101118-21kworker/u8:1+flush-179:012:05:250
4012803995951,5cyclictest4057608-21kworker/u8:3+flush-179:009:45:161
4012803995951,5cyclictest4057608-21kworker/u8:3+flush-179:009:45:151
4012803995945,4cyclictest4015943-21kworker/u8:1+events_unbound07:45:011
4012803995853,3cyclictest4091232-21kworker/u8:2+events_unbound11:45:231
4012803995852,4cyclictest4038181-21kworker/u8:1+events_unbound08:50:241
4012803995852,4cyclictest4008122-21kworker/u8:2+flush-179:007:20:221
401280399582,53cyclictest1-21systemd09:15:011
4012803995751,4cyclictest4038181-21kworker/u8:1+events_unbound08:30:231
4012803995750,5cyclictest4107450-21latency_hist12:05:011
4012803995650,4cyclictest4039776-21kworker/u8:2+flush-179:008:35:231
4012803995649,4cyclictest4054428-21kworker/u8:0+flush-179:009:30:151
4012803995646,8cyclictest4094708-21apt-get11:25:111
4012801995647,7cyclictest4091232-21kworker/u8:2+flush-179:011:45:210
4012803995548,5cyclictest4038181-21kworker/u8:1+flush-179:009:40:161
4012803995547,7cyclictest4091301-21kworker/u8:3+flush-179:011:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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