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Let 'fdctl configure' set up smp_affinity #2300

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ripatel-fd opened this issue Jul 3, 2024 · 0 comments
Open

Let 'fdctl configure' set up smp_affinity #2300

ripatel-fd opened this issue Jul 3, 2024 · 0 comments
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fdctl perf Performance optimization

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@ripatel-fd
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ripatel-fd commented Jul 3, 2024 •
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Relates to #2297

A default configuration Fedora 40 will clumsily schedule ksoftirqd processes onto the same CPUs as Firedancer tiles.

This is mostly not noticeable but can lead to sporadic drops in performance at high packet rates (>15Mpps)

We should teach fdctl configure to adapt the smp_affinity sysfs knob to forbid such IRQs from running on any Firedancer-assigned CPUs.
@ripatel-fd ripatel-fd changed the title Let fdctl configure set up smp_affinity Let 'fdctl configure' set up smp_affinity Jul 3, 2024
@ripatel-fd ripatel-fd added fdctl perf Performance optimization labels Jul 4, 2024
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