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2026-09-07 - 14:22
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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 Mon Sep 07, 2026 00:44:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24069522238174,18sleep40-21swapper/419:09:284
24046432230168,19sleep30-21swapper/319:05:173
24046712229165,51sleep20-21swapper/219:05:402
24046942226168,18sleep70-21swapper/719:06:027
24069752212183,19sleep00-21swapper/019:09:490
24068462211183,18sleep10-21swapper/119:07:571
24068042210183,18sleep60-21swapper/619:07:216
24047102206177,19sleep50-21swapper/519:06:165
25125632610,0sleep30-21swapper/322:16:313
2407210993937,1cyclictest0-21swapper/720:15:007
240720299360,32cyclictest2418949-21munin-run19:30:013
240719699360,32cyclictest2477505-21/usr/sbin/munin21:15:021
240721099330,32cyclictest2549962-21cron23:25:017
240719399330,31cyclictest2563872-21cron23:50:010
2407208993228,3cyclictest2586134-21cups-browsed00:28:486
240720899320,4cyclictest2474679-21cron21:10:006
240720899320,31cyclictest1-21systemd19:35:016
240719699320,31cyclictest1-21systemd00:40:011
2407193993231,1cyclictest0-21swapper/020:15:000
2407210993130,1cyclictest17950irq/4-ttyS022:50:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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