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2026-07-27 - 10:01
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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 Mon Jul 27, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
187986899129123,4cyclictest1967034-21kworker/u8:3+events_unbound23:40:261
187986699128120,5cyclictest1956683-21latency_hist23:10:010
187986899125117,6cyclictest1875285-21kworker/u8:2+events_unbound19:10:251
187986899121108,10cyclictest1958282-21apt-get23:15:011
187986899120109,8cyclictest1912914-21kworker/u8:1+flush-179:020:50:251
187986899119110,5cyclictest1890907-21kworker/u8:0+events_unbound19:55:001
187986899119109,7cyclictest1974516-21latency_hist00:05:001
187986899116108,5cyclictest1940816-21kworker/u8:2+flush-179:022:40:251
187986699115106,3cyclictest1927755-21kworker/u8:1+events_unbound22:00:190
187986699115104,4cyclictest1902027-21kworker/u8:0+events_unbound20:55:240
187986899114105,6cyclictest1897335-21kworker/u8:1+events_unbound20:15:001
187986699114105,6cyclictest1950323-21latency_hist22:50:010
187986899112103,7cyclictest1927755-21kworker/u8:1+flush-179:022:20:001
187986899111105,4cyclictest1907122-21kworker/u8:2+flush-179:021:05:261
187986699110105,3cyclictest1902027-21kworker/u8:0+events_unbound21:30:190
187986699110100,7cyclictest1958269-21latency_hist23:15:010
18798689910996,9cyclictest1213033-21systemd-journal20:30:001
187986899109101,6cyclictest1902027-21kworker/u8:0+events_unbound21:00:011
187986899108103,3cyclictest1881342-21kworker/u8:1+flush-179:019:20:011
18798669910898,8cyclictest1984574-21apt-get00:35:110
187986699108103,4cyclictest1894331-21kworker/u8:2+events_unbound19:55:240
18798689910594,9cyclictest1931218-21apt-get21:50:101
18798669910591,11cyclictest1972880-40mandb00:00:010
18798689910494,6cyclictest1881405-21kworker/u8:3+events_unbound19:25:211
18798669910497,5cyclictest1971296-21kworker/u8:1+flush-179:000:30:010
18798689910397,4cyclictest1924641-21kworker/u8:2+events_unbound21:35:191
18798689910396,5cyclictest1894331-21kworker/u8:2+events_unbound20:00:011
18798689910192,6cyclictest1887712-21kworker/u8:1+flush-179:019:40:251
18798689910179,12cyclictest1894331-21kworker/u8:2+flush-179:020:05:241
18798689910095,3cyclictest1966464-21kworker/u8:2+flush-179:023:45:211
18798669910095,4cyclictest1902027-21kworker/u8:0+events_unbound20:40:290
18798669910088,10cyclictest1979801-21/usr/sbin/munin00:20:240
1879868999890,6cyclictest1887730-21latency_hist19:35:011
1879868999689,4cyclictest1935158-21kworker/u8:2+events_unbound22:05:181
1879866999685,8cyclictest1213033-21systemd-journal20:20:020
1879868999587,5cyclictest1974505-21kworker/u8:0+events_unbound00:10:001
1879868999584,7cyclictest1913485-21kworker/u8:3+flush-179:021:00:181
1879868999281,7cyclictest1902027-21kworker/u8:0+flush-179:021:40:161
1879868999185,4cyclictest1881405-21kworker/u8:3+flush-179:019:20:211
1879868999185,4cyclictest1881405-21kworker/u8:3+flush-179:019:20:201
1879866999187,3cyclictest1940816-21kworker/u8:2+events_unbound22:35:000
1879866999180,8cyclictest1953767-21apt-get23:00:120
1879868999085,3cyclictest1902027-21kworker/u8:0+events_unbound21:15:261
1879868999081,7cyclictest1974505-21kworker/u8:0+events_unbound00:20:011
1879866999078,9cyclictest1213033-21systemd-journal21:40:000
1879868998983,4cyclictest1974505-21kworker/u8:0+flush-179:000:30:231
1879868998979,8cyclictest1963567-21apt-get23:30:121
1879866998976,10cyclictest1902062-21apt-get20:19:590
1879868998882,4cyclictest1974505-21kworker/u8:0+flush-179:000:10:191
1879868998881,5cyclictest1897335-21kworker/u8:1+flush-179:020:30:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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