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2026-05-20 - 04:09
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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 May 20, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15618769911396,13cyclictest1579546-21latency_hist20:05:011
15618749910697,7cyclictest1636513-21latency_hist23:00:000
15618769910290,9cyclictest1571574-21/usr/sbin/munin19:40:231
15618749910193,5cyclictest1213033-21systemd-journal21:19:590
1561876999785,9cyclictest1561797-21kworker/u8:2+flush-179:019:25:001
1561876999774,20cyclictest1581626-21/usr/sbin/munin20:10:251
1561876999683,9cyclictest1213033-21systemd-journal00:03:591
1561874999487,5cyclictest1609185-21kworker/u8:2+flush-179:022:00:000
1561874999483,8cyclictest1610802-21latency_hist21:40:010
1561876999384,6cyclictest1634922-21latency_hist22:55:001
1561876999384,6cyclictest1634922-21latency_hist22:55:001
1561874999183,6cyclictest1650567-21kworker/u8:0+flush-179:023:55:140
1561874998980,7cyclictest1561797-21kworker/u8:2+events_unbound19:40:010
1561874998881,5cyclictest1655932-21kworker/u8:3+flush-179:000:15:200
1561874998878,7cyclictest1561750-21latency_hist19:10:020
1561874998780,4cyclictest1650567-21kworker/u8:0+events_unbound23:45:010
1561874998780,4cyclictest1635181-21kworker/u8:1+flush-179:023:00:150
1561874998777,7cyclictest1647679-21kworker/u8:3+events_unbound23:35:020
1561874998472,10cyclictest1614295-21kworker/u8:0+flush-179:022:20:000
1561874998274,5cyclictest1614295-21kworker/u8:0+events_unbound22:25:020
1561874998174,5cyclictest1594929-21kworker/u8:0+flush-179:021:25:000
1561874998172,7cyclictest1652690-21latency_hist23:50:010
1561876998069,8cyclictest3093167-21cups-browsed00:00:011
1561874998065,11cyclictest1213033-21systemd-journal20:11:570
1561876997972,4cyclictest1591462-21apt-get20:40:031
1561876997869,6cyclictest1620607-21latency_hist22:10:001
1561874997870,6cyclictest1577957-21latency_hist20:00:020
1561874997764,10cyclictest1576091-21latency_hist19:55:010
1561874997667,7cyclictest1655932-21kworker/u8:3+flush-179:000:30:220
1561874997565,6cyclictest1594929-21kworker/u8:0+events_unbound21:05:240
1561874997468,4cyclictest1609185-21kworker/u8:2+flush-179:022:00:230
1561874997357,12cyclictest1213033-21systemd-journal19:35:010
1561874997266,5cyclictest1594929-21kworker/u8:0+events_unbound21:10:240
1561874997265,5cyclictest1561797-21kworker/u8:2+flush-179:019:10:200
1561874997265,5cyclictest1561797-21kworker/u8:2+flush-179:019:10:190
1561874997260,9cyclictest1584597-21apt-get20:20:010
1561874997165,4cyclictest1614295-21kworker/u8:0+flush-179:022:30:150
1561874997164,4cyclictest1571372-21kworker/u8:0+events_unbound20:30:010
1561874997063,6cyclictest1631210-21kworker/u8:0+flush-179:022:50:250
1561874997063,6cyclictest1631210-21kworker/u8:0+flush-179:022:50:240
1561874997060,8cyclictest1595149-21apt-get20:50:120
1561874997060,7cyclictest1644459-21kworker/u8:1+flush-179:000:35:170
1561874996958,8cyclictest1639732-21kworker/u8:3+flush-179:023:10:240
1561876996861,4cyclictest1644459-21kworker/u8:1+flush-179:000:20:001
1561874996660,4cyclictest1569711-21kworker/u8:3+flush-179:019:45:210
1561874996659,4cyclictest1609185-21kworker/u8:2+flush-179:021:50:240
1561876996542,21cyclictest1566795-21/usr/sbin/munin19:25:231
1561874996559,4cyclictest1571372-21kworker/u8:0+flush-179:020:20:150
1561874996556,6cyclictest1588048-21kworker/u8:3+flush-179:021:00:200
1561874996548,7cyclictest1619058-21kworker/u8:3+flush-179:022:15:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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