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2025-11-20 - 18:04
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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 Nov 20, 2025 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3076599910288,11cyclictest328250-21latency_hist08:15:001
307659999584,8cyclictest339653-21latency_hist08:50:011
307659998452,31cyclictest0-21swapper/110:21:591
307657998451,31cyclictest723-21Xorg10:21:590
307659998373,7cyclictest401142-21/usr/sbin/munin12:00:231
307657998155,23cyclictest322123-21/usr/sbin/munin07:55:200
307659998070,7cyclictest343345-21/usr/sbin/munin09:00:231
307657997665,9cyclictest271-21systemd-journal10:10:000
307657997665,9cyclictest271-21systemd-journal10:10:000
307659997367,4cyclictest342802-21kworker/u8:1+events_unbound09:00:011
307657997161,8cyclictest342829-21apt-get09:00:000
307657997160,8cyclictest325318-21/usr/sbin/munin08:05:220
307665996859,5cyclictest323490-21turbostat08:00:013
307659996857,9cyclictest271-21systemd-journal10:15:001
307657996857,9cyclictest323751-21apt-get08:00:110
307659996759,6cyclictest397746-21kworker/u8:3+flush-179:012:10:001
307659996660,4cyclictest328746-21kworker/u8:0+flush-179:008:20:251
30765999660,63cyclictest0-21swapper/111:20:591
307657996560,4cyclictest394578-21kworker/u8:2+flush-179:012:05:250
307657996455,6cyclictest388165-21latency_hist11:20:020
307659996353,8cyclictest406159-21/usr/sbin/munin12:15:241
307657996356,5cyclictest323732-21kworker/u8:1+flush-179:008:20:000
307659996256,4cyclictest397746-21kworker/u8:3+events_unbound12:10:211
307657996252,7cyclictest317120-21latency_hist07:40:020
307657996250,9cyclictest375428-21latency_hist10:40:010
307659995851,5cyclictest355820-21latency_hist09:40:011
307659995847,8cyclictest321887-21latency_hist07:55:011
307657995849,7cyclictest271-21systemd-journal12:05:010
307657995848,8cyclictest366145-21apt-get10:10:140
307657995751,4cyclictest397746-21kworker/u8:3+flush-179:012:30:250
307657995750,5cyclictest364052-21apt-get10:05:010
307657995750,5cyclictest364052-21apt-get10:05:010
307657995546,7cyclictest312329-21latency_hist07:25:000
307657995448,5cyclictest370905-21kworker/u8:2+events_unbound10:30:010
307657995443,8cyclictest338070-21latency_hist08:45:010
307659995345,6cyclictest364045-21latency_hist10:05:011
307659995345,6cyclictest364045-21latency_hist10:05:011
307657995348,4cyclictest407486-21kworker/u8:0+flush-179:012:20:160
307657995347,5cyclictest301525-21kworker/u8:3+flush-179:007:20:010
307657995343,8cyclictest323732-21kworker/u8:1+flush-179:008:40:000
307659995244,6cyclictest365921-21kworker/u8:0+flush-179:010:20:001
307659995242,7cyclictest381804-21latency_hist11:00:001
307657995245,5cyclictest362455-21latency_hist10:00:010
307657995245,5cyclictest347898-21kworker/u8:3+events_unbound09:45:180
307657995244,6cyclictest377033-21latency_hist10:45:000
307657995242,8cyclictest271-21systemd-journal09:40:010
307659995148,2cyclictest372290-21kworker/u8:3+events_unbound11:25:281
307659995144,5cyclictest355872-21kworker/u8:2+events_unbound09:55:251
307659995141,8cyclictest271-21systemd-journal09:55:001
307659995042,7cyclictest344930-21kworker/u8:2+flush-179:009:20:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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