From: Charles Oliver Nutter <charles.nutter@...>
Date: 2007-09-28T19:56:37+09:00
Subject: Re: what is mean by thread scheduler in Ruby?

7stud -- wrote:
> Vellingiri Arul wrote:
>>      what is mean by thread scheduler in Ruby?with example?
>>
>>
>> Please Any one help me?
>>
>> by
>> Vellingiri
> 
> Threads don't execute at the same time despite what the literature might 
> say.  If you have two threads, for instance your main program and one 
> thread, then one thread executes for a short time, and then execution 
> switches to the other thread for a short time, and then execution 
> switches back.  The switching back and forth happens so fast that it 
> gives the appearance that the threads are executing at the same time. 
> The thread scheduler determines which thread gets execution time and how 
> much.

Some time ago I wrote an article on RubySpec about Ruby's threading 
implementation; if there's anything to add to that, please do.

http://headius.com/rubyspec/index.php/Ruby_Threading

There's also an article on JRuby's threading, which is native, 
concurrent, and just allows the OS to schedule.

http://headius.com/rubyspec/index.php/JRuby_Threading

- Charlie