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2025-11-18 - 10:22
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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 Nov 18, 2025 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
163870399127118,6cyclictest1731696-40logrotate00:00:010
1638707999788,6cyclictest1688231-21apt-get21:45:041
1638703999684,9cyclictest1673909-21latency_hist21:00:010
1638707998978,7cyclictest1645033-21kworker/u8:2+flush-179:019:40:001
1638707998373,7cyclictest1740091-21cp00:25:011
1638703998276,4cyclictest1710741-21kworker/u8:0+events_unbound23:00:010
1638703998069,8cyclictest1688224-21latency_hist21:45:010
1638707997866,8cyclictest1672537-21/usr/sbin/munin20:55:281
1638703997873,3cyclictest1619240-21kworker/u8:0+flush-179:020:00:260
1638703997868,7cyclictest1680513-21/usr/sbin/munin21:20:250
1638703997770,5cyclictest1637153-21kworker/u8:3+events_unbound19:20:000
1638703997770,4cyclictest1685065-21kworker/u8:2+events_unbound21:35:000
1638703997465,7cyclictest1741855-21kworker/u8:2+events_unbound00:35:280
1638703997165,5cyclictest1713976-21kworker/u8:2+events_unbound23:15:260
1638703997165,4cyclictest1645033-21kworker/u8:2+flush-179:019:30:150
1638703996862,4cyclictest1723473-21kworker/u8:2+flush-179:000:03:590
1638703996861,4cyclictest1701288-21sed22:25:000
1638707996657,6cyclictest1645033-21kworker/u8:2+flush-179:019:30:221
1638703996658,6cyclictest271-21systemd-journal00:15:010
1638707996454,8cyclictest1726926-21apt-get23:45:121
1638707996360,2cyclictest723-21Xorg20:09:001
1638703996354,7cyclictest1693497-21/usr/sbin/munin22:00:240
1638707996144,14cyclictest1709162-21latency_hist22:50:001
1638703996152,7cyclictest1680279-21latency_hist21:20:010
1638703996151,7cyclictest1690067-21latency_hist21:50:010
1638703995953,4cyclictest1677075-21kworker/u8:4+flush-179:022:05:190
1638703995953,4cyclictest1619240-21kworker/u8:0+flush-179:019:45:200
1638709995855,2cyclictest0-21swapper/222:21:592
1638707995648,6cyclictest1738122-21apt-get00:20:001
1638707995523,24cyclictest1668786-21kworker/u8:0+flush-179:020:40:271
1638703995550,4cyclictest1710984-21kworker/u8:3+events_unbound23:40:270
1638703995549,4cyclictest1710984-21kworker/u8:3+events_unbound23:50:010
1638703995548,5cyclictest1728752-21kworker/u8:0+events_unbound00:15:250
1638703995545,7cyclictest1677081-21latency_hist21:10:010
1638703995445,5cyclictest271-21systemd-journal23:37:280
1638703995347,5cyclictest1677075-21kworker/u8:4+flush-179:022:40:250
1638703995347,5cyclictest1677075-21kworker/u8:4+flush-179:021:35:270
1638707995242,8cyclictest1713917-21kworker/u8:1+flush-179:023:20:001
1638707995242,7cyclictest1663002-21/usr/sbin/munin20:25:251
1638703995244,6cyclictest1664331-21kworker/u8:2+events_unbound20:40:000
1638703995238,7cyclictest1645033-21kworker/u8:2+events_unbound19:35:210
1638707995143,5cyclictest1644997-21latency_hist19:30:011
1638707995143,5cyclictest1644997-21latency_hist19:30:011
1638703995144,5cyclictest1677075-21kworker/u8:4+events_unbound22:00:000
1638703995142,6cyclictest1658019-21kworker/u8:1+flush-179:020:45:190
1638712995048,1cyclictest0-21swapper/321:25:593
1638712995048,1cyclictest0-21swapper/321:25:583
1638707995042,6cyclictest1619240-21kworker/u8:0+flush-179:019:15:001
1638707995042,5cyclictest281ktimers/119:50:141
1638703995045,4cyclictest1709153-21kworker/u8:2+events_unbound22:50:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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