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2025-12-03 - 05:15
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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 Dec 03, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18110999910398,4cyclictest1904731-21kworker/u8:3+events_unbound00:04:031
18110949910190,8cyclictest1846595-21latency_hist21:00:000
1811099999787,7cyclictest1828853-21latency_hist20:05:001
1811099999787,7cyclictest1828853-21latency_hist20:05:001
1811099999489,4cyclictest1827301-21kworker/u8:2+events_unbound21:20:261
1811099999483,8cyclictest1878681-21latency_hist22:40:011
1811099999187,3cyclictest1857719-21kworker/u8:3+events_unbound21:35:241
1811094999183,5cyclictest1819331-21kworker/u8:0+flush-179:019:45:230
1811094999175,12cyclictest1810797-21latency_hist19:10:030
1811094999080,7cyclictest1896695-21kworker/u8:2+flush-179:000:00:010
1811099998867,18cyclictest1860254-21kworker/u8:1+flush-179:021:40:261
1811099998473,8cyclictest1898289-21latency_hist23:40:011
1811094997869,5cyclictest1870463-21latency_hist22:15:000
1811094997468,4cyclictest1819331-21kworker/u8:0+flush-179:019:35:230
1811094997462,9cyclictest1838648-21latency_hist20:35:010
1811094997061,6cyclictest1908581-21kworker/u8:0+flush-179:000:15:010
1811094996963,4cyclictest1838630-21kworker/u8:3+flush-179:020:35:250
1811099996864,3cyclictest1827301-21kworker/u8:2+events_unbound20:55:251
1811099996860,3cyclictest1807848-21kworker/u8:1+events_unbound19:10:221
1811099996860,3cyclictest1807848-21kworker/u8:1+events_unbound19:10:211
1811094996854,10cyclictest271-21systemd-journal00:40:000
1811094996854,10cyclictest271-21systemd-journal00:39:590
1811094996851,9cyclictest1812671-21latency_hist19:15:020
1811094996851,9cyclictest1812671-21latency_hist19:15:010
1811099996762,4cyclictest1880520-21kworker/u8:1+events_unbound22:55:191
1811099996561,3cyclictest1878031-21kworker/u8:0+events_unbound22:43:011
1811099996561,3cyclictest1827160-21kworker/u8:0+events_unbound20:10:241
1811094996557,6cyclictest1848456-21apt-get21:05:120
1811099996459,4cyclictest1810853-21kworker/u8:0+events_unbound19:15:241
1811094996455,5cyclictest1840273-21kworker/u8:0+events_unbound20:50:260
1811099996358,4cyclictest1867340-21kworker/u8:3+events_unbound22:07:201
1811099996258,3cyclictest1911929-21kworker/u8:2+events_unbound00:31:371
1811099996257,4cyclictest1909521-21kworker/u8:1+events_unbound00:24:211
1811099996257,4cyclictest1827301-21kworker/u8:2+events_unbound20:23:201
1811099996254,3cyclictest1827301-21kworker/u8:2+events_unbound20:50:271
1811099996253,7cyclictest1873326-21kworker/u8:3+flush-179:022:30:001
1811099996152,7cyclictest271-21systemd-journal23:30:191
1811094996154,5cyclictest1899930-21kworker/u8:0+flush-179:000:05:000
1811099996057,2cyclictest0-21swapper/100:11:591
1811099996055,4cyclictest1832516-21kworker/u8:1+events_unbound20:38:191
1811099996054,5cyclictest1840273-21kworker/u8:0+events_unbound20:49:201
1811094996050,8cyclictest1873326-21kworker/u8:3+flush-179:022:25:210
1811099995951,6cyclictest1914539-21awk00:30:011
1811099995948,8cyclictest1890076-21latency_hist23:15:011
1811094995953,4cyclictest1860654-21kworker/u8:2+flush-179:021:45:240
1811094995950,6cyclictest1870498-21kworker/u8:0+events_unbound22:20:020
1811099995854,3cyclictest1899930-21kworker/u8:0+events_unbound23:56:191
1811099995854,3cyclictest1870498-21kworker/u8:0+events_unbound22:20:041
1811099995854,3cyclictest1860654-21kworker/u8:2+events_unbound21:57:221
1811099995854,3cyclictest1824107-21kworker/u8:1+events_unbound19:54:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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