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2026-05-12 - 20:47
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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 May 12, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1795705999789,6cyclictest1839249-21latency_hist09:25:011
1795705999686,7cyclictest1869408-21kworker/u8:0+flush-179:011:20:001
1795705999583,9cyclictest1867327-21latency_hist10:50:011
1795703999382,7cyclictest1844283-21latency_hist09:40:010
1795705998981,6cyclictest1812140-21apt-get07:57:371
1795703998777,7cyclictest1886683-21latency_hist11:50:010
1795703998576,6cyclictest1213033-21systemd-journal12:30:010
1795705998274,6cyclictest1878714-21kworker/u8:2+flush-179:011:25:011
1795703998274,4cyclictest1829737-21kworker/u8:2+flush-179:009:00:010
1795705998171,7cyclictest1865745-21latency_hist10:45:011
1795703998171,8cyclictest1880554-21/usr/sbin/munin11:30:230
1795703998170,9cyclictest1822001-21apt-get08:30:090
1795703998169,10cyclictest1878985-21apt-get11:25:130
1795705997767,8cyclictest1856179-21apt-get10:15:121
1795705997666,8cyclictest1855913-21kworker/u8:0+flush-179:010:30:161
1795703997556,16cyclictest1888780-21apt-get11:55:140
1795705997465,6cyclictest1880315-21latency_hist11:30:011
1795705997465,6cyclictest1860705-21latency_hist10:30:011
1795705997465,6cyclictest1789254-21kworker/u8:1+flush-179:007:10:181
1795705997465,6cyclictest1789254-21kworker/u8:1+flush-179:007:10:181
1795703997467,4cyclictest1829737-21kworker/u8:2+flush-179:009:05:210
1795703997465,6cyclictest1829692-21latency_hist08:55:000
1795703997465,6cyclictest1829692-21latency_hist08:55:000
1795703997265,5cyclictest1889401-21kworker/u8:1+flush-179:012:00:250
1795705997164,5cyclictest1889401-21kworker/u8:1+flush-179:012:05:171
1795705997060,7cyclictest1213033-21systemd-journal07:52:371
1795705996858,8cyclictest1849818-21apt-get09:55:121
1795703996857,8cyclictest1831555-21apt-get09:00:120
1795703996857,8cyclictest1810535-21kworker/u8:0+flush-179:007:55:200
1795705996760,5cyclictest1798851-21kworker/u8:2+events_unbound07:50:011
1795703996762,3cyclictest1859355-21kworker/u8:1+flush-179:010:25:120
1795703996758,6cyclictest1851129-21kworker/u8:1+flush-179:010:10:230
179570799660,64cyclictest0-21swapper/208:48:002
1795703996663,2cyclictest0-21swapper/009:31:000
1795703996655,9cyclictest1847730-21apt-get09:50:000
1795705996359,3cyclictest1840869-21kworker/u8:1+flush-179:009:35:061
1795705996350,10cyclictest1213033-21systemd-journal12:40:011
1795703996355,6cyclictest1899928-21apt-get12:30:100
1795703996353,8cyclictest1815380-21latency_hist08:10:010
1795705996248,4cyclictest1795644-21kworker/u8:3+flush-179:007:15:221
1795703996253,7cyclictest1824935-21latency_hist08:40:010
1795709996058,1cyclictest0-21swapper/307:33:003
1795705996053,6cyclictest1855913-21kworker/u8:0+flush-179:010:15:001
1795705996052,7cyclictest1878714-21kworker/u8:2+flush-179:011:55:011
1795703995955,3cyclictest1795644-21kworker/u8:3+events_unbound07:15:140
1795703995951,6cyclictest1853013-21apt-get10:05:130
1795705995855,2cyclictest1855913-21kworker/u8:0+events_unbound10:20:231
1795705995851,5cyclictest1213033-21systemd-journal09:12:361
1795703995850,6cyclictest1863922-21kworker/u8:3+flush-179:010:40:250
1795703995849,7cyclictest1896757-21apt-get12:20:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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