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2025-07-14 - 21:26
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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 rackeslot8.osadl.org (updated Mon Jul 14, 2025 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4546012860,1sleep20-21swapper/211:59:462
26667993224,6cyclictest226837-21systemd-run09:40:010
26674993017,7cyclictest0-21swapper/210:45:002
26672992926,2cyclictest291771-21systemctl10:20:001
26674992821,6cyclictest53751-21/usr/sbin/munin07:30:002
26674992820,7cyclictest116195-21cron08:20:012
26674992616,9cyclictest479053-21munin-plugin-st12:15:002
26674992613,6cyclictest0-21swapper/210:25:152
26667992620,5cyclictest332513-21systemd-run10:45:010
26667992618,6cyclictest7922-21kworker/u8:3-events_unbound07:55:000
26672992522,2cyclictest365190-21systemd-run11:05:011
26674992416,7cyclictest373243-21munin-plugin-st11:10:002
26674992318,3cyclictest284363-21gltestperf10:15:162
26674992316,6cyclictest0-21swapper/210:15:002
26674992315,7cyclictest91470-21cut08:00:012
26674992315,6cyclictest66845-21latency_hist07:40:012
26674992311,7cyclictest158585-21ntp_kernel_pll_08:50:222
2667499231,12cyclictest273177-21/usr/sbin/munin10:05:252
2667299231,2cyclictest210567-21awk09:30:001
26674992218,3cyclictest3004-21cron11:30:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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