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2026-03-18 - 16:47
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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 Wed Mar 18, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6998979910496,6cyclictest736670-21latency_hist09:05:011
699895999787,8cyclictest788156-21latency_hist11:45:010
699897999586,6cyclictest762700-21latency_hist10:25:011
699897999182,6cyclictest730307-21latency_hist08:45:001
699897998377,4cyclictest761103-21latency_hist10:20:011
699897998377,4cyclictest761103-21latency_hist10:20:011
699897998375,5cyclictest698242-21kworker/u8:0+flush-179:007:35:211
699895998373,8cyclictest770885-21/usr/sbin/munin10:50:240
699895998172,7cyclictest722345-21latency_hist08:20:000
699895997772,4cyclictest738491-21kworker/u8:1+flush-179:009:20:010
699895997769,6cyclictest266-21systemd-journal07:15:010
699895997768,6cyclictest704798-21/usr/sbin/munin07:25:230
699897997667,7cyclictest762735-21kworker/u8:3+flush-179:010:40:001
699897997564,9cyclictest266-21systemd-journal11:05:011
699897997265,5cyclictest746222-21apt-get09:35:021
699897997261,8cyclictest746206-21latency_hist09:35:001
699897997064,4cyclictest266-21systemd-journal07:47:511
699895997064,5cyclictest727092-21kworker/u8:3+events_unbound08:40:000
699897996960,7cyclictest789406-21kworker/u8:3+events_unbound12:05:001
699895996962,5cyclictest266-21systemd-journal09:14:550
699895996960,7cyclictest793181-21apt-get12:00:000
699902996861,5cyclictest743051-21turbostat09:25:003
699897996859,6cyclictest754429-21latency_hist10:00:011
699895996762,3cyclictest698242-21kworker/u8:0+flush-179:007:15:180
699895996659,4cyclictest711187-21kworker/u8:1+flush-179:007:50:010
699897996556,6cyclictest765905-21kworker/u8:2+flush-179:011:00:011
699895996559,4cyclictest789406-21kworker/u8:3+flush-179:012:05:190
699897996459,3cyclictest789406-21kworker/u8:3+flush-179:012:15:001
699895996459,3cyclictest755509-21kworker/u8:1+events_unbound10:15:280
699895996459,3cyclictest755509-21kworker/u8:1+events_unbound10:15:280
699895996255,5cyclictest765905-21kworker/u8:2+flush-179:010:55:120
699895996155,4cyclictest717555-21kworker/u8:1+flush-179:008:25:220
69989599611,56cyclictest1-21systemd11:16:270
699902996058,1cyclictest0-21swapper/307:50:003
699902996052,6cyclictest722348-21turbostat08:20:003
699895996054,4cyclictest795575-21kworker/u8:0+flush-179:012:10:150
699895996054,4cyclictest727092-21kworker/u8:3+flush-179:008:50:210
699897995952,5cyclictest266-21systemd-journal10:04:271
699897995848,8cyclictest266-21systemd-journal10:30:271
699897995832,24cyclictest743035-21latency_hist09:25:011
699895995852,4cyclictest739310-21kworker/u8:2+flush-179:009:45:220
699897995751,5cyclictest775461-21kworker/u8:3+events_unbound11:15:231
699897995750,5cyclictest725527-21latency_hist08:30:011
699897995734,20cyclictest759504-21latency_hist10:15:011
699895995749,6cyclictest748309-21/usr/sbin/munin09:40:240
699895995747,7cyclictest795575-21kworker/u8:0+flush-179:012:40:000
699897995650,4cyclictest711187-21kworker/u8:1+flush-179:007:50:211
699897995649,5cyclictest701365-21latency_hist07:15:001
699897995648,6cyclictest266-21systemd-journal09:06:271
699895995648,6cyclictest762735-21kworker/u8:3+events_unbound10:45:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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