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2026-03-11 - 09:16
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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 Wed Mar 11, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
78857699116108,6cyclictest812630-21kworker/u8:2+events_unbound20:45:000
78857699115107,6cyclictest882072-21kworker/u8:1+events_unbound00:00:020
7885779910797,7cyclictest814237-21latency_hist20:30:011
7885779910593,9cyclictest836518-21latency_hist21:40:011
788576999990,7cyclictest893302-21latency_hist00:35:000
788577999888,7cyclictest849504-21latency_hist22:20:021
788576999686,8cyclictest875486-21latency_hist23:40:010
788576999486,6cyclictest820614-21kworker/u8:0+flush-179:020:50:240
788576999486,6cyclictest796402-21kworker/u8:3+flush-179:019:50:000
788576999177,5cyclictest872335-21kworker/u8:1+events_unbound23:35:010
788577998979,7cyclictest869110-21latency_hist23:20:011
788576998980,7cyclictest791675-21latency_hist19:20:010
788577998881,5cyclictest820614-21kworker/u8:0+flush-179:020:50:001
788576998781,4cyclictest827963-21kworker/u8:1+events_unbound21:30:240
788577998680,5cyclictest806269-21kworker/u8:2+flush-179:020:10:001
788576998679,5cyclictest790088-21kworker/u8:2+events_unbound19:35:210
788576998678,6cyclictest827963-21kworker/u8:1+flush-179:021:45:000
788576998579,4cyclictest857449-21kworker/u8:0+flush-179:000:05:000
788576998579,4cyclictest834908-21kworker/u8:3+events_unbound21:50:240
788577998478,4cyclictest844972-21/usr/sbin/munin22:05:231
788577998370,4cyclictest843111-21kworker/u8:0+flush-179:022:00:241
788577998273,7cyclictest801457-21latency_hist19:50:011
788577998270,6cyclictest814475-21kworker/u8:1+flush-179:020:40:011
788577998174,4cyclictest834908-21kworker/u8:3+flush-179:021:45:201
788576998171,8cyclictest894893-21apt-get00:40:000
788577998074,4cyclictest862739-21kworker/u8:1+events_unbound23:05:001
788576998073,5cyclictest827963-21kworker/u8:1+events_unbound21:15:010
788576998072,6cyclictest874880-21kworker/u8:2+events_unbound23:45:020
788577997974,4cyclictest827963-21kworker/u8:1+events_unbound21:20:001
788577997973,4cyclictest851146-21kworker/u8:2+flush-179:022:40:211
788576997973,4cyclictest853349-21kworker/u8:1+flush-179:022:30:240
788576997872,5cyclictest801491-21kworker/u8:0+events_unbound20:10:240
788576997765,10cyclictest877090-21apt-get23:45:000
788577997565,8cyclictest859062-21apt-get22:49:591
788577997468,4cyclictest853349-21kworker/u8:1+flush-179:022:30:191
788577997466,6cyclictest770798-21kworker/u8:0+flush-179:019:10:201
788577997465,7cyclictest877079-21latency_hist23:45:001
788576997468,5cyclictest834908-21kworker/u8:3+events_unbound21:45:230
788576997466,5cyclictest834908-21kworker/u8:3+flush-179:021:35:190
788577997368,3cyclictest860943-21kworker/u8:3+flush-179:022:59:561
788576997365,6cyclictest834908-21kworker/u8:3+flush-179:021:55:200
788576997365,6cyclictest811079-21latency_hist20:20:020
788577997267,4cyclictest790088-21kworker/u8:2+flush-179:019:34:561
788577997266,5cyclictest885131-21kworker/u8:1+flush-179:000:09:551
788577997166,3cyclictest801491-21kworker/u8:0+events_unbound20:20:181
788576997163,6cyclictest853349-21kworker/u8:1+flush-179:022:45:010
788577997063,5cyclictest772427-21kworker/u8:3+flush-179:019:15:211
788577997062,6cyclictest857449-21kworker/u8:0+flush-179:023:55:011
788576997064,4cyclictest834908-21kworker/u8:3+events_unbound22:10:010
788576997064,4cyclictest770798-21kworker/u8:0+flush-179:019:10:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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