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2026-05-11 - 12:44
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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 Mon May 11, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18097579910897,8cyclictest1820836-21latency_hist19:45:010
18097609910594,9cyclictest1827439-21kworker/u8:1+flush-179:020:05:001
1809757999787,7cyclictest1907635-21latency_hist00:15:010
1809760999687,6cyclictest1829048-21latency_hist20:10:011
1809760999686,8cyclictest1854522-21latency_hist21:30:011
1809760999182,6cyclictest1898015-21kworker/u8:0+flush-179:000:20:151
1809760998782,4cyclictest1877302-21kworker/u8:1+flush-179:022:50:001
180976099841,81cyclictest1898069-21kworker/u8:3+flush-179:000:00:011
1809757998474,8cyclictest1844979-21latency_hist21:00:010
1809760998174,5cyclictest1822918-21/usr/sbin/munin19:50:221
1809760998063,14cyclictest1213033-21systemd-journal21:05:001
1809757998066,11cyclictest1902793-40logrotate00:00:010
1809760997772,3cyclictest1875455-21kworker/u8:3+flush-179:022:35:231
1809760997771,4cyclictest1888505-21kworker/u8:1+flush-179:023:30:161
1809760997771,4cyclictest1888505-21kworker/u8:1+flush-179:023:30:151
1809760997667,7cyclictest1809710-21kworker/u8:2+flush-179:020:15:171
1809760997665,9cyclictest1906302-21apt-get00:10:111
1809757997665,9cyclictest1824522-21apt-get19:55:120
1809760997567,5cyclictest1898015-21kworker/u8:0+flush-179:000:05:241
1809760997566,6cyclictest1885310-21kworker/u8:2+flush-179:023:20:231
1809760997565,8cyclictest1817895-21apt-get19:35:121
1809760997565,7cyclictest1838650-21kworker/u8:2+flush-179:020:40:161
1809760997462,4cyclictest1811506-21kworker/u8:0+events_unbound19:20:231
1809757997466,6cyclictest1898015-21kworker/u8:0+flush-179:000:25:260
1809760997364,6cyclictest1213033-21systemd-journal00:04:001
1809757997363,8cyclictest1838870-21apt-get20:40:110
1809760997265,5cyclictest1885310-21kworker/u8:2+flush-179:023:25:201
1809760997264,6cyclictest1885333-21kworker/u8:3+flush-179:023:10:261
1809760997167,3cyclictest1827506-21kworker/u8:3+flush-179:020:10:211
1809760997164,5cyclictest1827439-21kworker/u8:1+flush-179:020:30:161
1809760997063,6cyclictest1898069-21kworker/u8:3+events_unbound23:55:001
1809757997062,6cyclictest1885333-21kworker/u8:3+flush-179:023:30:000
1809757997059,9cyclictest1859560-21apt-get21:45:110
1809760996962,4cyclictest1840741-21kworker/u8:3+flush-179:021:55:141
1809760996961,5cyclictest1866941-21kworker/u8:0+flush-179:022:10:141
180976299680,66cyclictest0-21swapper/222:25:002
1809760996863,3cyclictest1838650-21kworker/u8:2+flush-179:021:15:181
1809760996862,4cyclictest1866941-21kworker/u8:0+flush-179:022:15:171
1809757996859,7cyclictest1870669-21kworker/u8:2+flush-179:022:30:180
1809760996760,4cyclictest1859281-21kworker/u8:1+events_unbound21:50:011
180975799671,2cyclictest714-21Xorg21:50:590
1809760996560,4cyclictest1812835-21kworker/u8:3+flush-179:019:29:561
1809760996560,4cyclictest1812835-21kworker/u8:3+flush-179:019:29:561
1809760996558,5cyclictest1809710-21kworker/u8:2+flush-179:019:15:211
1809760996556,6cyclictest1881503-21kworker/u8:0+events_unbound22:55:011
1809760996459,4cyclictest1885310-21kworker/u8:2+flush-179:023:05:181
1809760996458,4cyclictest1909293-21kworker/u8:3+events_unbound00:40:001
1809760996458,4cyclictest1881503-21kworker/u8:0+flush-179:023:05:001
1809757996453,9cyclictest1883964-21apt-get23:00:130
1809760996359,3cyclictest1877302-21kworker/u8:1+events_unbound22:55:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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