From: SASADA Koichi <ko1@...>
Date: 2015-03-18T05:59:52+09:00
Subject: [ruby-core:68549] Re: Looking for MRI projects for Ruby Google Summer of Code 2015

I sent several ideas on previous, mail, but they are seems rejected?


Btw, I have question about this project:

> Cross-thread Fiber support
> 
> MRI supports coroutines through "Fibers", a lightweight cooperative concurrency context. However, Fibers are presently bound to a single thread, and cannot be resumed in a different thread from the one they were created in. This prevents scheduling runnable Fibers in a thread pool ala similar primitives like goroutines.
> 
> This project involves mapping out the semantic implications of resuming Fibers in a different thread from the one they're created in, paying attention to all of the potential problems e.g. holding a mutex while suspended, then making the corresponding changes to MRI. The resulting project should allow Fibers to be resumed between different Ruby threads in a way that is safe and won't corrupt memory.
> 
>     Prerequisites: C, concurrency
>     Programming areas include: C, concurrency, multi-threaded programming. Ruby knowledge helpful
>     Estimated difficulty level: Difficult
>     Potential mentors: @bascule

quoted from https://github.com/rubygsoc/rubygsoc/wiki/Ideas-List

Fiber captures also machine stack. How to resume it on the other
threads? It is very interesting.

-- 
// SASADA Koichi at atdot dot net