From: Peter Zotov <whitequark@...>
Date: 2012-08-29T05:00:20+09:00
Subject: Re: force child threads run paralelly?

Robert Klemme писал 28.08.2012 21:31:
> On Tue, Aug 28, 2012 at 6:11 PM, Andriy Andreyev 
> <andreev00@gmail.com> wrote:
>> Sorry for jumping in, but Tony, can you please explain what the idea 
>> is
>> behind having Threads implemented and not allowing them to be 
>> executed in
>> parallel? Thanks in advance.
>
> Also, this approach allows to have multithreading on a platform which
> does not support threads out of the box.  Granted, these are rare
> nowadays - that was more important in the early days.

It does not, at least not by itself. Ruby 1.9 requires a proper 
pthreads
implementation, which means that you must provide a scheduler anyway. 
Ruby 1.8
had green threads, which did work on threadless platforms, but having 
green
threads doesn't require one to abandon multicore support. For example, 
Erlang
has both.

-- 
   WBR, Peter Zotov.