Optimizing the BEAM's Scheduler for Many-Core Machines - Robin Morisset | Code BEAM Europe 2025

Описание: ✨ This talk was recorded at Code BEAM Europe in November 2025. If you're curious about our upcoming event, check https://codebebeameurope.com ✨
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The BEAM is famous for supporting many lightweight processes. But the scheduler responsible for deciding which of these processes should execute on which core at which time was designed at a time when most servers only had a few cores, and can suffer from severe lock contention issues when used on many-core machines (100+ cores).
In this talk I'll explain the main ideas behind how the BEAM's scheduler works, how to discover and investigate lock-contention issues, and then explain some recent changes that mitigated these issues for the BEAM's scheduler.
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