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2026-03-31 - 03:44
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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 Tue Mar 31, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1736399999587,6cyclictest1816598-21kworker/u8:0+events_unbound23:50:021
1736398999586,7cyclictest266-21systemd-journal21:15:000
1736399999486,6cyclictest1805286-21kworker/u8:3+events_unbound23:25:011
1736399999388,4cyclictest1805286-21kworker/u8:3+events_unbound23:15:021
1736399999383,7cyclictest1773162-21latency_hist21:05:011
1736399999182,6cyclictest1823303-21kworker/u8:1+events_unbound23:45:261
1736399999182,6cyclictest1823303-21kworker/u8:1+events_unbound23:45:251
1736399998982,5cyclictest1785925-21kworker/u8:3+events_unbound22:10:001
1736398998981,3cyclictest1765249-21kworker/u8:2+events_unbound20:55:250
1736399998680,4cyclictest1758824-21kworker/u8:1+flush-179:020:25:261
1736399998578,5cyclictest1824854-21latency_hist23:45:001
1736399998577,5cyclictest1747678-21kworker/u8:0+events_unbound20:20:241
1736399998577,5cyclictest1747678-21kworker/u8:0+events_unbound20:20:241
1736398998580,4cyclictest1765249-21kworker/u8:2+events_unbound21:05:270
1736399998478,4cyclictest1721768-21kworker/u8:2+flush-179:019:45:261
1736399998372,3cyclictest1721768-21kworker/u8:2+flush-179:019:35:251
1736398998272,7cyclictest1828280-21latency_hist23:55:020
1736399998176,4cyclictest1798091-21kworker/u8:1+events_unbound22:40:031
1736398998071,7cyclictest1758825-21/usr/sbin/munin20:20:240
1736398998071,7cyclictest1758825-21/usr/sbin/munin20:20:230
1736399997973,5cyclictest1765249-21kworker/u8:2+flush-179:021:00:001
1736399997972,5cyclictest1781157-21kworker/u8:1+flush-179:021:50:001
1736398997974,4cyclictest1721768-21kworker/u8:2+events_unbound19:25:230
1736399997870,6cyclictest1798617-21latency_hist22:25:011
1736399997772,4cyclictest1816598-21kworker/u8:0+events_unbound00:04:011
1736399997767,4cyclictest1784541-21kworker/u8:2+events_unbound21:40:241
1736398997672,3cyclictest1833153-21kworker/u8:3+events_unbound00:25:150
1736398997668,6cyclictest1798091-21kworker/u8:1+flush-179:022:45:210
1736399997570,4cyclictest1747678-21kworker/u8:0+flush-179:020:00:001
1736398997566,7cyclictest1823255-21latency_hist23:40:010
1736399997463,4cyclictest1721768-21kworker/u8:2+events_unbound20:00:251
1736398997470,3cyclictest1721768-21kworker/u8:2+events_unbound20:00:140
1736398997369,3cyclictest1816598-21kworker/u8:0+events_unbound00:15:130
1736399997267,4cyclictest1798091-21kworker/u8:1+events_unbound22:45:231
1736399997267,4cyclictest1765249-21kworker/u8:2+flush-179:021:10:261
1736399997265,5cyclictest1721768-21kworker/u8:2+flush-179:019:15:201
1736399997256,6cyclictest1816598-21kworker/u8:0+events_unbound23:55:181
1736399997256,6cyclictest1798091-21kworker/u8:1+events_unbound22:30:001
1736398997264,3cyclictest1785925-21kworker/u8:3+events_unbound22:05:140
1736398997263,3cyclictest1758824-21kworker/u8:1+events_unbound20:40:230
1736399997158,5cyclictest1781157-21kworker/u8:1+flush-179:021:32:281
1736398997167,3cyclictest1798091-21kworker/u8:1+events_unbound22:42:340
1736398997164,5cyclictest1755394-21latency_hist20:10:010
1736398997163,3cyclictest1841112-21kworker/u8:0+events_unbound00:37:560
1736399997064,4cyclictest1744283-21kworker/u8:1+events_unbound19:40:151
1736399997063,6cyclictest1805286-21kworker/u8:3+flush-179:023:35:001
1736399997063,5cyclictest1805286-21kworker/u8:3+events_unbound23:35:171
1736399997063,5cyclictest1780860-21kworker/u8:0+events_unbound21:35:261
1736399997060,8cyclictest1789316-21apt-get21:55:131
1736398997065,4cyclictest1785925-21kworker/u8:3+events_unbound21:45:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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