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2024-04-19 - 04:02
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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 rack8slot8.osadl.org (updated Wed Jan 10, 2024 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
161212610,1sleep016124-21cut0
3770994812,22cyclictest25271-21acpi1
377099471,30cyclictest4463-21munin-run1
377099461,31cyclictest27297-21kworker/u8:01
377099441,27cyclictest23716-21diskstats1
377099441,26cyclictest17444-21aten2.4_r8power1
377099436,23cyclictest821-21gdbus1
377099421,26cyclictest32358-21/usr/sbin/munin1
377099421,25cyclictest698-21sh1
377099411,25cyclictest6850-21unixbench-2d1
377099411,25cyclictest20916-21chrt1
377099411,24cyclictest7379-21/usr/sbin/munin1
377099411,24cyclictest12015-21sh1
377099407,19cyclictest7929-21cat1
377099401,25cyclictest30776-21chrt1
377099401,24cyclictest5429-21needreboot1
377099401,24cyclictest13491-21chrt1
377099401,23cyclictest15469-21acpi1
280812391,20sleep028086-21ntp_states0
377099381,23cyclictest21754-21sh1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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