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2026-07-31 - 07:11
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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 Fri Jul 31, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19386499134119,12cyclictest1213033-21systemd-journal22:00:011
19386499131121,7cyclictest282403-21latency_hist23:45:001
19386499129119,7cyclictest193735-21latency_hist19:10:011
19386499128123,3cyclictest227762-21kworker/u8:3+events_unbound21:05:131
19386499121116,4cyclictest282438-21kworker/u8:1+events_unbound23:45:231
19386399121111,7cyclictest1213033-21systemd-journal22:35:000
19386499120114,4cyclictest256643-21kworker/u8:0+events_unbound22:25:011
19386499119114,4cyclictest256643-21kworker/u8:0+events_unbound23:00:301
19386399116108,5cyclictest276268-21kworker/u8:2+flush-179:000:00:160
19386399116107,7cyclictest240985-21apt-get21:35:130
19386399114101,11cyclictest1213033-21systemd-journal19:55:000
19386499113102,8cyclictest267825-21latency_hist23:00:001
19386399113105,5cyclictest263071-21kworker/u8:2+flush-179:023:05:270
19386499112103,4cyclictest245748-21kworker/u8:0+events_unbound22:10:241
19386499110105,4cyclictest282438-21kworker/u8:1+events_unbound23:55:251
19386399110100,7cyclictest245511-21latency_hist21:50:010
1938639910997,9cyclictest297088-21kworker/u8:0+events_unbound00:30:010
1938649910894,10cyclictest224795-21/usr/sbin/munin20:45:221
1938649910498,4cyclictest287486-21kworker/u8:3+events_unbound00:05:211
1938649910495,6cyclictest218185-21latency_hist20:25:011
1938649910492,9cyclictest234097-21latency_hist21:15:011
1938639910182,16cyclictest201752-21http19:35:010
1938649910094,4cyclictest287486-21kworker/u8:3+events_unbound00:30:201
1938649910091,6cyclictest201726-21apt-get19:35:001
193864999995,3cyclictest218219-21kworker/u8:2+events_unbound20:25:181
193864999994,4cyclictest232749-21kworker/u8:1+events_unbound21:20:241
193864999993,4cyclictest221340-21kworker/u8:1+events_unbound20:35:181
193864999992,4cyclictest256643-21kworker/u8:0+events_unbound22:50:231
193864999893,4cyclictest214426-21kworker/u8:0+events_unbound20:15:251
193864999892,4cyclictest256643-21kworker/u8:0+events_unbound22:40:171
193864999785,9cyclictest1213033-21systemd-journal20:00:011
193863999790,5cyclictest214426-21kworker/u8:0+flush-179:020:15:220
193864999686,7cyclictest274177-21latency_hist23:20:001
193863999690,4cyclictest179749-21kworker/u8:1+flush-179:019:15:150
193864999590,4cyclictest221340-21kworker/u8:1+events_unbound20:55:241
193863999585,7cyclictest250296-21latency_hist22:05:010
193863999483,8cyclictest287423-40logrotate00:00:020
193864999389,3cyclictest263071-21kworker/u8:2+events_unbound23:10:261
193864999282,8cyclictest269661-21apt-get23:05:141
193863999283,6cyclictest270044-21kworker/u8:1+flush-179:023:35:160
193863999283,6cyclictest270044-21kworker/u8:1+flush-179:023:35:150
193864999086,3cyclictest227762-21kworker/u8:3+events_unbound21:15:261
193864999084,4cyclictest256700-21kworker/u8:2+events_unbound22:30:131
193863998979,7cyclictest227968-21/usr/sbin/munin20:55:250
193864998581,3cyclictest221340-21kworker/u8:1+events_unbound20:34:561
193864998581,3cyclictest201698-21kworker/u8:1+events_unbound19:35:141
193864998480,3cyclictest174128-21kworker/u8:0+events_unbound19:45:161
193863998475,7cyclictest266446-21/usr/sbin/munin22:55:250
193864998378,4cyclictest221340-21kworker/u8:1+events_unbound20:50:221
193864998378,3cyclictest276268-21kworker/u8:2+events_unbound23:30:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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