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2025-08-29 - 14:38
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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 rack8slot4.osadl.org (updated Fri Aug 29, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23479582243176,22sleep70-21swapper/719:06:017
23479232226168,18sleep10-21swapper/119:05:311
23501302223193,19sleep60-21swapper/619:09:226
23501382218190,17sleep50-21swapper/519:09:295
23501082215163,17sleep20-21swapper/219:09:022
23501282214159,17sleep40-21swapper/419:09:204
23499362206178,18sleep30-21swapper/319:06:383
23499712204175,18sleep00-21swapper/019:07:070
25195482540,0sleep20-21swapper/200:16:192
235038699340,3cyclictest2430989-21http21:36:135
235038699330,1cyclictest2493756-21http23:31:105
2350377993228,3cyclictest2506730-21turbostat23:55:003
2350377993228,3cyclictest2506730-21turbostat23:55:003
2350390993128,2cyclictest1-21systemd19:55:016
2350390993127,3cyclictest2498637-21latency_hist23:40:006
235039099310,30cyclictest2397843-21sh20:35:016
2350386993127,3cyclictest1202534-21systemd-journal00:25:015
235038699310,28cyclictest105-21kcompactd020:03:025
235037299310,30cyclictest1202534-21systemd-journal19:30:001
2350370993127,3cyclictest2509419-21turbostat.cron00:00:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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