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2026-05-17 - 06:34
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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
Characteristics of the 20 highest latencies:
System rackdslot0.osadl.org (updated Sun May 17, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
939899220,18cyclictest0-21swapper/219:40:102
939899220,18cyclictest0-21swapper/219:40:102
9398992113,5cyclictest0-21swapper/221:50:122
939899210,20cyclictest843-21systemd-network19:20:512
938999210,20cyclictest25440-21grep22:30:130
939899202,17cyclictest0-21swapper/221:35:142
9393992018,1cyclictest12693-21nfsd422:05:181
9393992017,2cyclictest26489-21grep00:25:191
939899193,15cyclictest0-21swapper/222:04:192
9398991917,1cyclictest0-21swapper/220:07:492
9398991917,1cyclictest0-21swapper/200:21:062
9398991916,2cyclictest29878-21timerwakeupswit00:30:222
9398991916,2cyclictest29878-21timerwakeupswit00:30:212
9398991914,4cyclictest0-21swapper/222:10:012
939899191,16cyclictest15614-21cpuspeed_turbos23:10:132
939899190,18cyclictest0-21swapper/222:40:132
939899190,18cyclictest0-21swapper/200:26:352
939899190,17cyclictest23026-21python319:35:012
939399191,17cyclictest16822-21ntp_kernel_err23:10:181
9389991916,2cyclictest17284-21cpuspeed_turbos00:10:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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