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2025-11-19 - 06:43
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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 rack9slot2.osadl.org (updated Wed Nov 19, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
252592278215,33sleep10-21swapper/11
251202267184,45sleep00-21swapper/00
252412252180,24sleep30-21swapper/33
252702251215,24sleep20-21swapper/22
2553599243237,4cyclictest0-21swapper/22
2552799190184,4cyclictest23144-21sendmail-msp0
2553099180171,6cyclictest23125-21perf1
946121530,4sleep22553599cyclictest2
255389910498,4cyclictest23096-21munin-run3
277532470,2sleep10-21swapper/11
114662440,3sleep10-21swapper/11
324492430,2sleep232448-21sed2
2552799421,26cyclictest13783-21unixbench-2d0
2552799421,26cyclictest13783-21unixbench-2d0
325792390,2sleep00-21swapper/00
2552799392,34cyclictest9261-21sed0
2552799391,23cyclictest31920-21cat0
2552799390,24cyclictest14202-21expr0
2552799381,21cyclictest11360-21ntp_states0
2552799380,22cyclictest29947-21ntp_states0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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