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2026-04-30 - 04:55
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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 Wed Apr 29, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35993859910798,7cyclictest3683163-21latency_hist11:30:000
35993859910596,7cyclictest3634597-21latency_hist09:00:010
35993859910596,7cyclictest3634597-21latency_hist09:00:010
35993899910296,4cyclictest3593203-21kworker/u8:0+events_unbound07:20:011
35993859910088,9cyclictest1213033-21systemd-journal09:55:000
3599385999588,5cyclictest3670192-21kworker/u8:0+flush-179:010:50:260
3599385999588,5cyclictest3670192-21kworker/u8:0+flush-179:010:50:250
3599385998777,7cyclictest3657386-21latency_hist10:10:010
3599385998777,7cyclictest3657386-21latency_hist10:10:010
3599389998678,6cyclictest3627973-21latency_hist08:40:001
3599389998561,22cyclictest3705959-21latency_hist12:40:001
3599385998374,7cyclictest3655801-21latency_hist10:05:010
3599385998372,8cyclictest3675446-21/usr/sbin/munin11:05:230
3599385998072,6cyclictest3624783-21latency_hist08:30:010
3599389997969,8cyclictest510-21rs:main1
3599389997869,6cyclictest3649436-21latency_hist09:45:001
3599389997869,6cyclictest3649436-21latency_hist09:45:001
3599385997764,10cyclictest3680226-21/usr/sbin/munin11:20:230
3599389997568,5cyclictest3638085-21kworker/u8:1+flush-179:009:10:161
3599389997560,13cyclictest3634637-21kworker/u8:3+flush-179:009:40:001
3599385997365,5cyclictest3663218-21kworker/u8:0+flush-179:010:30:260
3599389997262,8cyclictest3696661-21apt-get12:10:121
3599389997162,6cyclictest3660821-21/usr/sbin/munin10:20:231
3599385997165,5cyclictest3651056-21kworker/u8:2+flush-179:009:55:230
3599389997062,6cyclictest3620040-21kworker/u8:0+flush-179:009:00:211
3599389997060,7cyclictest1213033-21systemd-journal11:04:551
3599389997058,9cyclictest3679948-21kworker/u8:2+flush-179:012:20:001
3599385996859,6cyclictest3643071-21latency_hist09:25:010
3599385996832,19cyclictest3643078-21turbostat09:29:550
3599385996761,4cyclictest3620263-21apt-get08:15:110
3599385996756,8cyclictest3636188-21latency_hist09:05:020
3599389996658,6cyclictest3686869-21apt-get11:40:101
3599385996557,6cyclictest3651021-21latency_hist09:50:010
3599385996556,7cyclictest3665648-21apt-get10:35:100
3599385996454,9cyclictest0-21swapper/007:44:590
3599385996358,4cyclictest3647875-21kworker/u8:4+flush-179:009:40:260
3599385996358,4cyclictest3647875-21kworker/u8:4+flush-179:009:40:260
3599385996254,6cyclictest3688454-21apt-get11:45:110
3599389996152,7cyclictest3604327-21apt-get07:25:131
3599389996151,8cyclictest3633251-21apt-get08:55:131
3599389996151,8cyclictest3633251-21apt-get08:55:121
3599389996150,8cyclictest3613897-21apt-get07:55:121
3599385996142,16cyclictest3686593-21latency_hist11:40:020
3599389996052,7cyclictest3679948-21kworker/u8:2+flush-179:011:35:011
3599389996050,7cyclictest3678616-21/usr/sbin/munin11:15:171
3599385996053,5cyclictest3681608-21kworker/u8:3+flush-179:011:55:170
3599385995953,5cyclictest1213033-21systemd-journal12:07:050
3599385995951,6cyclictest3673655-21kworker/u8:1+events_unbound11:30:230
3599389995747,8cyclictest3663752-21apt-get10:25:571
3599385995746,9cyclictest3663840-21kworker/u8:2+flush-179:011:00:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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