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2026-05-03 - 02:47
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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 Sat May 02, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3468802999690,5cyclictest3512393-21kworker/u8:3+events_unbound09:55:031
3468802999283,7cyclictest3555831-21kworker/u8:1+events_unbound12:00:021
3468801998982,4cyclictest3556021-21kworker/u8:3+events_unbound12:30:010
3468802998879,6cyclictest3547885-21latency_hist11:15:011
3468801998777,7cyclictest3515523-21latency_hist09:35:010
3468802998681,4cyclictest3541562-21kworker/u8:2+events_unbound11:00:241
3468802998681,4cyclictest3522385-21kworker/u8:0+flush-179:010:00:231
3468802998681,4cyclictest3507292-21kworker/u8:1+flush-179:009:25:251
3468802998580,4cyclictest3555831-21kworker/u8:1+flush-179:011:49:551
3468802998575,8cyclictest3554257-21latency_hist11:35:011
3468802998575,8cyclictest1213033-21systemd-journal08:20:001
3468801998579,4cyclictest3522385-21kworker/u8:0+events_unbound09:55:250
3468801998476,6cyclictest3507322-21apt-get09:10:040
3468801998476,5cyclictest3528767-21kworker/u8:3+flush-179:010:15:010
3468802998378,4cyclictest3541562-21kworker/u8:2+flush-179:011:24:551
3468802998378,4cyclictest3528767-21kworker/u8:3+events_unbound10:20:241
3468802998278,3cyclictest3565965-21kworker/u8:2+events_unbound12:25:251
3468802998278,3cyclictest3541562-21kworker/u8:2+flush-179:011:19:561
3468801998273,7cyclictest3562984-21/usr/sbin/munin12:00:230
3468802998177,3cyclictest3472004-21kworker/u8:3+events_unbound07:55:241
3468802998175,4cyclictest3556021-21kworker/u8:3+events_unbound12:10:231
3468801998173,5cyclictest3472004-21kworker/u8:3+events_unbound08:15:140
3468801998069,9cyclictest3562479-21apt-get12:00:000
3468802997872,4cyclictest3522385-21kworker/u8:0+events_unbound10:05:131
3468802997772,4cyclictest3541562-21kworker/u8:2+flush-179:011:35:241
3468801997769,6cyclictest3541516-21latency_hist10:55:000
3468802997671,4cyclictest3472004-21kworker/u8:3+flush-179:007:54:551
3468802997668,6cyclictest3472004-21kworker/u8:3+events_unbound08:40:171
3468802997570,4cyclictest3500922-21kworker/u8:3+events_unbound08:55:221
3468802997567,5cyclictest3476704-21kworker/u8:0+flush-179:007:35:221
3468802997566,6cyclictest3552669-21latency_hist11:30:011
3468801997568,5cyclictest3531976-21latency_hist10:25:010
3468801997568,5cyclictest3522385-21kworker/u8:0+flush-179:010:05:250
3468802997369,3cyclictest3472004-21kworker/u8:3+events_unbound08:20:131
3468802997368,4cyclictest3533800-21kworker/u8:1+events_unbound10:40:221
3468802997267,4cyclictest3505702-21kworker/u8:0+events_unbound09:40:241
3468802997263,6cyclictest3472004-21kworker/u8:3+events_unbound07:40:191
3468801997265,5cyclictest3515508-21kworker/u8:2+flush-179:009:45:220
3468802997164,4cyclictest3495095-21kworker/u8:1+events_unbound08:45:181
3468802997064,4cyclictest3559532-21kworker/u8:0+events_unbound11:55:141
3468802996964,4cyclictest3559532-21kworker/u8:0+flush-179:011:50:261
3468802996964,4cyclictest3518701-21kworker/u8:1+events_unbound09:50:181
3468802996964,4cyclictest3507292-21kworker/u8:1+flush-179:009:10:271
3468802996964,4cyclictest3472004-21kworker/u8:3+flush-179:008:05:291
3468802996964,3cyclictest3468772-21kworker/u8:0+events_unbound07:15:261
3468802996964,3cyclictest3468772-21kworker/u8:0+events_unbound07:15:251
3468802996963,5cyclictest3500922-21kworker/u8:3+flush-179:009:05:271
3468802996958,8cyclictest3538600-21apt-get10:45:121
3468802996955,11cyclictest1213033-21systemd-journal12:40:001
3468801996962,4cyclictest3471914-21kworker/u8:2+flush-179:007:20:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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