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2026-06-26 - 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 Fri Jun 26, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
179531699135125,7cyclictest1851690-21latency_hist22:05:011
179531699130116,11cyclictest1888568-40mandb00:00:011
179531699121115,5cyclictest1880819-21kworker/u8:3+flush-179:023:40:001
179531699119105,11cyclictest1213033-21systemd-journal23:00:001
179531599117101,10cyclictest1851470-21kworker/u8:3+flush-179:022:20:250
179531599113107,5cyclictest1859646-21kworker/u8:2+events_unbound23:10:240
179531599112101,8cyclictest1856447-21latency_hist22:20:020
17953159910698,6cyclictest1878736-21latency_hist23:30:010
17953169910594,9cyclictest1213033-21systemd-journal20:10:001
17953159910492,9cyclictest3367279-21cups-browsed00:00:000
17953159910483,6cyclictest1853274-21latency_hist22:10:010
17953169910295,4cyclictest1795258-21kworker/u8:0+flush-179:019:15:161
17953159910190,8cyclictest1859641-21latency_hist22:30:000
1795316999890,5cyclictest1837072-21kworker/u8:1+events_unbound21:25:001
1795316999689,5cyclictest1886924-21kworker/u8:2+events_unbound00:00:301
1795316999687,6cyclictest1859646-21kworker/u8:2+flush-179:023:05:241
1795316999687,6cyclictest1859646-21kworker/u8:2+flush-179:023:05:241
1795316999589,4cyclictest1859646-21kworker/u8:2+flush-179:022:30:171
1795316999585,7cyclictest1822547-21kworker/u8:1+flush-179:020:50:011
1795316999585,7cyclictest1822547-21kworker/u8:1+flush-179:020:50:001
1795315999591,3cyclictest1859646-21kworker/u8:2+events_unbound22:45:140
1795316999487,5cyclictest1804724-21kworker/u8:0+events_unbound19:50:251
1795316999487,4cyclictest1896565-21latency_hist00:25:011
1795315999486,6cyclictest1809520-21latency_hist19:55:010
1795315999482,9cyclictest1812725-21apt-get20:05:010
1795321999386,5cyclictest1832348-21turbostat21:05:003
1795316999382,9cyclictest1864674-21apt-get22:45:111
1795315999287,4cyclictest1838743-21kworker/u8:2+events_unbound21:30:250
1795316999180,9cyclictest1847164-21apt-get21:50:111
1795321999083,5cyclictest1806359-21turbostat19:45:003
1795315999079,8cyclictest1821470-21diskstats20:30:160
1795316998881,4cyclictest1862820-21latency_hist22:40:011
1795316998875,5cyclictest1832376-21kworker/u8:3+events_unbound21:15:021
1795315998878,8cyclictest1859899-21apt-get22:30:120
1795316998778,6cyclictest1873392-21kworker/u8:0+flush-179:023:50:151
1795316998778,6cyclictest1873392-21kworker/u8:0+flush-179:023:50:151
1795316998778,6cyclictest1809555-21kworker/u8:3+flush-179:019:55:251
1795315998774,9cyclictest1812710-21kworker/u8:0+flush-179:020:20:010
1795321998577,6cyclictest1901343-21turbostat00:40:003
1795321998577,6cyclictest1901343-21turbostat00:40:003
1795316998578,5cyclictest1809555-21kworker/u8:3+flush-179:020:25:211
1795316998577,5cyclictest1830697-21kworker/u8:2+flush-179:021:00:201
1795316998576,7cyclictest1844408-21kworker/u8:1+flush-179:022:40:131
1795316998576,6cyclictest1795258-21kworker/u8:0+events_unbound19:10:141
1795316998572,10cyclictest1869741-21diskstats23:00:151
1795315998580,4cyclictest1830697-21kworker/u8:2+events_unbound21:02:130
1795316998474,7cyclictest1789211-21kworker/u8:1+flush-179:019:25:201
1795316998376,4cyclictest1822547-21kworker/u8:1+flush-179:020:40:191
1795315998372,6cyclictest1861771-21diskstats22:35:160
1795316998275,5cyclictest1859646-21kworker/u8:2+flush-179:023:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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