[erlang-questions] Re: Shared/Hybrid Heap

Tony Arcieri <>
Thu Nov 4 17:38:02 CET 2010


On Wed, Nov 3, 2010 at 6:50 PM, Robert Virding <
> wrote:

> 1. Shared/hybrid heaps are wonderful BUT:
> - They are more difficult to implement in a real-time environment. Yes,
> this is a known problem with solutions but the benefits are less than you
> would expect. Real-time gc costs.
> - They don't port easily to multi-core systems as you suddenly start
> needing locks and stuff everywhere to control access or have complex schemes
> to get around this. Which copying doesn't.
>

There's been a considerable amount of research on this matter on the Java
platform. The Azul Java platform addresses both of these concerns, with a
pauseless GC designed for massively multi-core systems (54 cores per CPU):

http://www.azulsystems.com/products/vega/overview

I'd be curious how well Erjang would work on such a system, particularly on
the types of shared state concurrency problems that don't work well on BEAM,
like Chameneos.

-- 
Tony Arcieri
Medioh! A Kudelski Brand


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