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2025-11-28 - 18:06
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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 Nov 28, 2025 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18019789910496,6cyclictest1816532-21kworker/u8:0+events_unbound08:20:011
1801976999275,12cyclictest1887759-21latency_hist11:35:000
1801976998972,13cyclictest1882756-21apt-get11:20:000
1801978998681,4cyclictest1891272-21kworker/u8:2+events_unbound11:55:231
1801978998680,4cyclictest1872916-21kworker/u8:0+flush-179:010:50:241
1801978998478,4cyclictest1826908-21kworker/u8:2+events_unbound08:30:301
1801978998379,3cyclictest1818961-21kworker/u8:2+events_unbound08:00:241
1801978998378,4cyclictest1903477-21kworker/u8:1+flush-179:012:35:261
1801978998374,7cyclictest1837272-21latency_hist09:00:011
1801978998276,4cyclictest1880893-21kworker/u8:0+events_unbound11:40:011
1801978998075,4cyclictest1854799-21kworker/u8:2+events_unbound10:15:231
1801978997868,8cyclictest1840679-21/usr/sbin/munin09:10:221
1801978997770,4cyclictest1861426-21kworker/u8:1+flush-179:011:05:241
1801976997767,7cyclictest1817885-21latency_hist08:00:010
1801978997668,5cyclictest1789531-21kworker/u8:3+events_unbound07:10:161
1801978997570,4cyclictest1903477-21kworker/u8:1+flush-179:012:25:221
1801978997469,4cyclictest1789531-21kworker/u8:3+flush-179:007:15:201
1801976997262,7cyclictest1827449-21latency_hist08:30:010
1801978997167,3cyclictest1854799-21kworker/u8:2+flush-179:010:10:241
1801978997167,3cyclictest1816532-21kworker/u8:0+flush-179:008:10:251
1801978997160,8cyclictest1851593-21latency_hist09:45:011
1801978997062,6cyclictest1818961-21kworker/u8:2+events_unbound08:05:201
1801978996964,3cyclictest1875578-21kworker/u8:2+flush-179:011:25:231
1801978996963,4cyclictest1805115-21kworker/u8:2+events_unbound07:40:221
1801978996960,7cyclictest1808250-21latency_hist07:30:001
1801976996960,6cyclictest1848432-21kworker/u8:3+flush-179:010:05:240
1801976996958,8cyclictest1899751-21diskstats12:10:140
1801978996858,8cyclictest1842266-21/usr/sbin/munin09:15:251
1801978996858,8cyclictest1842266-21/usr/sbin/munin09:15:241
1801978996856,4cyclictest1851830-21kworker/u8:0+flush-179:009:50:181
202199670,18rtkit-daemon1801289-21ntp_192.168.11407:05:270
1801983996761,4cyclictest1880885-21turbostat11:15:003
1801978996762,4cyclictest1891272-21kworker/u8:2+events_unbound12:10:221
1801978996762,3cyclictest1835703-21kworker/u8:0+events_unbound09:05:241
1801978996733,33cyclictest723-21Xorg09:04:591
1801978996662,3cyclictest1805115-21kworker/u8:2+events_unbound07:35:261
1801978996660,4cyclictest1813103-21kworker/u8:1+events_unbound07:55:131
1801978996655,9cyclictest1901336-21diskstats12:15:141
1801976996657,7cyclictest1824256-21latency_hist08:20:000
1801978996561,3cyclictest1821058-21kworker/u8:1+flush-179:008:24:561
1801978996560,4cyclictest1875578-21kworker/u8:2+events_unbound10:55:231
1801978996557,6cyclictest1835703-21kworker/u8:0+events_unbound09:20:251
1801978996456,6cyclictest1854799-21kworker/u8:2+events_unbound09:55:201
1801976996461,2cyclictest0-21swapper/009:13:590
1801976996453,8cyclictest1845222-21latency_hist09:25:000
1801976996451,10cyclictest1857961-21latency_hist10:05:010
1801978996354,7cyclictest1871554-21cp10:45:011
1801978996257,4cyclictest1861426-21kworker/u8:1+flush-179:010:25:231
1801976996257,3cyclictest1880893-21kworker/u8:0+flush-179:011:40:260
1801978996155,4cyclictest1843595-21kworker/u8:1+events_unbound09:25:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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