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From: Julian Elischer <julian@elischer.org>
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To: Robert Watson <rwatson@freebsd.org>
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Cc: Paul Allen <nospam@ugcs.caltech.edu>, Lev Serebryakov <lev@freebsd.org>,
	current@freebsd.org
Subject: Re: KSE, libpthread & libthr: almost newbie question
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Robert Watson wrote:
> 
> On Fri, 27 Oct 2006, Julian Elischer wrote:
> 
>> there is class of problems (e.g. some java programs) that have 
>> THOUSANDS of threads, each representing an active aspect of some 
>> object. How do you put an rlimit on that without either 1/ stopping 
>> the program from working or 2/ allowing thousands of threads to exist 
>> but not screwing other users.
> 
> Does the JVM actually expose thousands of threads to the OS, or does it 
> actually do its own M:N threading internally based on its execution 
> model? My impression is the latter, exposing threads to the OS only when 
> it needs them to consume kernel or CPU resources.

I don't know the answer to that question, only that there is a class of 
program style that uses this model.

> 
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
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