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2026-07-07 - 12:15
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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 20 highest latencies:
System rack0slot5.osadl.org (updated Tue Jul 07, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
196509899520519,1cyclictest1907984-21kworker/4:2+i915-unordered19:12:3410
19651289950967,441cyclictest0-21swapper/1120:14:343
19651109950227,58cyclictest2005750-21ntp_states19:51:5513
19651109950227,58cyclictest2005750-21ntp_states19:51:5513
196510599502502,0cyclictest0-21swapper/620:40:3412
19651289949415,479cyclictest0-21swapper/1120:24:343
196513199487486,1cyclictest0-21swapper/1219:12:344
196512099483481,2cyclictest2060048-21kworker/10:2+i915-unordered21:20:332
196512099483481,2cyclictest2037913-21kworker/10:1+i915-unordered20:52:342
1965131994826,0cyclictest0-21swapper/1222:52:334
1965083994820,481cyclictest0-21swapper/022:17:330
196510299476474,2cyclictest2091682-21kworker/5:2+i915-unordered21:55:3311
196512899470470,0cyclictest2113538-21kworker/11:1+i915-unordered22:09:333
196513899466465,1cyclictest2038322-21kworker/14:1+i915-unordered20:40:346
1965138994650,460cyclictest0-21swapper/1400:23:336
1965102994640,460cyclictest0-21swapper/500:23:3311
196512899463463,0cyclictest0-21swapper/1120:40:343
19651109946311,28cyclictest0-21swapper/719:46:5513
19651109946311,28cyclictest0-21swapper/719:46:5513
196510299462461,1cyclictest2225357-21kworker/5:0+i915-unordered00:04:3311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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