# Exploring Multicore Concurrency for Embedded Swift

**URL:** <https://forums.swift.org/t/exploring-multicore-concurrency-for-embedded-swift/87129>\
**Category:** Embedded\
**Tags:** concurrency, embedded, thread\
**Created:** [June 5, 2026, 6:18am UTC](https://forums.swift.org/t/exploring-multicore-concurrency-for-embedded-swift/87129 "2026-06-05T06:18:16Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![FranzBusch](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/franzbusch/32/19447_2.png) [@FranzBusch](https://forums.swift.org/u/FranzBusch)\
**Post date:** [August 19, 2026, 9:12am UTC](https://forums.swift.org/t/exploring-multicore-concurrency-for-embedded-swift/87129/17 "2026-08-19T09:12:24Z")

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This is exciting to follow and amazing progress so far.

> [@Gonzalo\_Larralde](#):
>
> - Explore a small family of executor implementations for platforms without libdispatch. The existing `CooperativeGlobalExecutor` already covers the single-threaded, cooperatively drained case. Two additional models seem useful: a fixed-worker executor for systems with a known number of cores or execution contexts, where a fixed number of long-lived workers consume jobs from shared queues; and a thread-backed executor for platforms that provide basic thread creation and synchronization but no higher-level scheduling library. Both need enough machinery for queueing, wakeups, priorities, and timers, but should remain substantially smaller than reimplementing or embedding libdispatch. The goal would be a few adaptable executor models spanning single-threaded, fixed-core, and general threaded environments.
> 
> - Explore a `wasi-threads` executor. This is platform-specific and likely involves shared memory, Wasm atomics, worker startup, and TLS. Some executor design lessons may overlap with bare metal, although the host-provided threading model is quite different.

For those two in particular, I would love if we could add them to [GitHub - swiftlang/swift-platform-executors: This package provides platform-native executors for Swift Concurrency. · GitHub](https://github.com/swiftlang/swift-platform-executors). The repo is intended to provide executors for Swift's supported platforms. Ideally, at some point in the future we would start using them as the default executors for Swift. I am mostly focused on the Linux executors here which are implemented without any Dispatch dependency using pthreads. Decoupling the Concurrency runtime entirely from Dispatch is a larger thing though and requires exposing more hooks as protocols that executors can implement such as the ongoing [[Pitch 4] Delayed Enqueuing for Executors](https://forums.swift.org/t/pitch-4-delayed-enqueuing-for-executors/87918).

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