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2026-06-29 - 11:40
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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 Jun 29, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
154604999140131,6cyclictest1568426-21kworker/u8:2+flush-179:020:30:010
15460499912398,15cyclictest1566780-21latency_hist20:15:010
154604999122110,8cyclictest1603673-21latency_hist22:10:010
154605299121110,8cyclictest1605258-21latency_hist22:15:011
15460529910798,6cyclictest1563060-21kworker/u8:2+flush-179:020:00:241
15460529910798,6cyclictest1563060-21kworker/u8:2+flush-179:020:00:241
15460499910594,8cyclictest1639460-21kworker/u8:2+flush-179:000:35:240
15460529910190,9cyclictest1639512-40mandb00:00:011
1546052999585,8cyclictest1594384-21apt-get21:40:121
1546052999384,6cyclictest1567016-21kworker/u8:0+flush-179:020:35:221
1546052999382,8cyclictest1607106-21kworker/u8:0+flush-179:022:20:221
1546052999380,11cyclictest1213033-21systemd-journal19:35:001
1546052999285,5cyclictest1598867-21kworker/u8:0+flush-179:022:00:001
1546052999284,6cyclictest1565194-21latency_hist20:10:011
1546049999283,6cyclictest1558291-21kworker/u8:1+events_unbound20:20:000
1546052999079,9cyclictest1213033-21systemd-journal22:05:011
1546049999082,5cyclictest1642969-21kworker/u8:0+flush-179:000:10:170
1546049999081,6cyclictest1567016-21kworker/u8:0+flush-179:021:15:240
1546052998981,6cyclictest1567016-21kworker/u8:0+flush-179:021:45:231
1546052998881,5cyclictest1639460-21kworker/u8:2+flush-179:000:20:011
1546052998879,6cyclictest1567016-21kworker/u8:0+flush-179:021:30:171
1546052998878,8cyclictest1649356-21apt-get00:30:121
1546052998877,8cyclictest1642969-21kworker/u8:0+flush-179:000:10:231
1546049998873,12cyclictest3098085-21cups-browsed00:00:000
1546049998670,9cyclictest1213033-21systemd-journal19:20:000
1546049998579,4cyclictest1605243-21kworker/u8:2+events_unbound22:35:010
1546052998475,6cyclictest1618238-21kworker/u8:2+flush-179:023:20:211
1546049998377,4cyclictest1605243-21kworker/u8:2+flush-179:022:35:170
1546049998371,9cyclictest1213033-21systemd-journal00:03:590
1546052998268,12cyclictest1577970-21kworker/u8:3+flush-179:021:25:011
1546049998276,4cyclictest1598867-21kworker/u8:0+flush-179:021:55:240
1546049998271,9cyclictest1578191-21apt-get20:50:120
1546049998271,7cyclictest1567016-21kworker/u8:0+flush-179:021:30:260
1546052998173,5cyclictest1626494-21kworker/u8:0+flush-179:023:50:241
1546052998172,6cyclictest1577970-21kworker/u8:3+flush-179:021:35:221
1546049998069,8cyclictest1621178-21kworker/u8:1+flush-179:023:05:120
1546055997973,4cyclictest1631534-21turbostat23:35:013
1546055997951,27cyclictest0-21swapper/300:40:003
1546052997972,5cyclictest1605243-21kworker/u8:2+flush-179:022:15:221
1546049997970,6cyclictest1558291-21kworker/u8:1+flush-179:019:50:170
1546052997871,5cyclictest1552442-21kworker/u8:0+events_unbound19:45:241
1546052997868,7cyclictest1605243-21kworker/u8:2+flush-179:022:35:241
1546049997873,3cyclictest1605243-21kworker/u8:2+flush-179:022:25:000
1546049997771,4cyclictest1639460-21kworker/u8:2+flush-179:000:15:270
1546049997665,7cyclictest1616374-21kworker/u8:1+flush-179:022:50:230
1546052997568,4cyclictest1623023-21kworker/u8:3+flush-179:023:10:171
1546052997563,8cyclictest1529981-21kworker/u8:0+flush-179:019:20:011
1546049997567,5cyclictest1639460-21kworker/u8:2+events_unbound00:20:250
1546049997566,6cyclictest1618238-21kworker/u8:2+flush-179:023:40:250
1546049997565,8cyclictest1529981-21kworker/u8:0+events_unbound19:10:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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