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2026-03-10 - 22:09
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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 Tue Mar 10, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3580835999585,7cyclictest3662942-21latency_hist11:25:010
3580835999382,4cyclictest3675205-21kworker/u8:0+events_unbound12:10:230
3580835998883,4cyclictest3650249-21kworker/u8:3+events_unbound10:50:230
3580835998883,4cyclictest3596892-21kworker/u8:1+events_unbound08:20:230
3580839998780,5cyclictest3596967-21kworker/u8:2+flush-179:009:05:241
3580839998676,7cyclictest3612868-21kworker/u8:1+flush-179:008:55:241
3580835998575,4cyclictest3580752-21kworker/u8:3+events_unbound07:25:260
3580839998472,8cyclictest3622649-21apt-get09:20:001
3580835998374,7cyclictest266-21systemd-journal08:50:000
3580839998273,7cyclictest3680449-21apt-get12:20:041
3580835998276,4cyclictest3669547-21kworker/u8:2+events_unbound11:50:200
3580839998069,7cyclictest3603333-21kworker/u8:0+flush-179:008:40:201
3580835998075,4cyclictest3624489-21kworker/u8:0+events_unbound09:45:180
3580835998072,3cyclictest3580752-21kworker/u8:3+events_unbound07:30:240
3580839997764,12cyclictest3596967-21kworker/u8:2+events_unbound09:05:011
3580835997773,3cyclictest3669547-21kworker/u8:2+flush-179:011:59:550
3580835997772,4cyclictest3684174-21kworker/u8:3+events_unbound12:35:190
3580835997769,5cyclictest3626117-21kworker/u8:2+events_unbound09:30:230
3580839997670,4cyclictest3675205-21kworker/u8:0+flush-179:012:15:251
3580835997671,4cyclictest3632491-21kworker/u8:2+events_unbound10:45:220
3580835997571,3cyclictest3632491-21kworker/u8:2+events_unbound09:55:150
3580839997459,14cyclictest3624489-21kworker/u8:0+flush-179:009:25:261
3580835997461,10cyclictest3641985-21apt-get10:19:590
3580839997365,6cyclictest3590598-21kworker/u8:1+flush-179:007:45:221
3580835997369,3cyclictest3624489-21kworker/u8:0+events_unbound09:40:240
3580839997265,4cyclictest3632491-21kworker/u8:2+events_unbound10:40:171
3580835997268,3cyclictest3632491-21kworker/u8:2+flush-179:010:14:560
3580839997163,5cyclictest3624489-21kworker/u8:0+flush-179:010:00:251
3580839997058,9cyclictest3650249-21kworker/u8:3+flush-179:011:30:201
3580835997066,3cyclictest3585559-21kworker/u8:0+events_unbound08:00:160
3580835997065,4cyclictest3645417-21kworker/u8:0+events_unbound10:30:180
3580839996960,6cyclictest3663979-21kworker/u8:0+flush-179:011:35:221
3580839996958,9cyclictest3632491-21kworker/u8:2+flush-179:009:55:201
3580835996964,4cyclictest3677253-21kworker/u8:1+events_unbound12:20:140
3580835996960,7cyclictest3648867-21/usr/sbin/munin10:40:230
3580835996958,8cyclictest266-21systemd-journal11:45:000
3580839996759,5cyclictest3596967-21kworker/u8:2+flush-179:008:25:171
3580835996656,7cyclictest3595325-21latency_hist07:55:010
3580835996655,4cyclictest3612868-21kworker/u8:1+events_unbound09:15:240
3580839996555,8cyclictest3585521-21apt-get07:25:041
3580839996456,5cyclictest3661612-21apt-get11:20:131
3580835996359,3cyclictest3596967-21kworker/u8:2+flush-179:008:29:560
3580835996355,6cyclictest3645435-21latency_hist10:30:010
3580839996254,5cyclictest3650249-21kworker/u8:3+events_unbound11:15:001
3580835996257,4cyclictest3596892-21kworker/u8:1+events_unbound08:30:240
3580835996257,4cyclictest3588930-21kworker/u8:2+events_unbound07:37:190
3580835996253,7cyclictest3654991-21latency_hist11:00:020
3580839996154,5cyclictest3596967-21kworker/u8:2+events_unbound08:05:011
3580839996153,5cyclictest3640440-21kworker/u8:3+flush-179:010:15:191
3580835996157,3cyclictest3596967-21kworker/u8:2+flush-179:008:50:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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