Re: Fw: Writeup on AIO design (uploaded) - corrected url

[Suparna Bhattacharya <suparna@in.ibm.com>]

On Wed, Jan 30, 2002 at 10:46:27AM -0500, Jakub Jelinek wrote:
> On Wed, Jan 30, 2002 at 08:51:15PM +0530, Suparna Bhattacharya wrote:
> > 
> > Oops, oops, oops, I mispelt the website.
> > It should have been:
> > 
> > http://lse.sourceforge.net/io/aionotes.txt
> 
>   a. User level threads
>         - glibc approach (one user thread per operation ?)
>           poor scalability, performance
> 
> Glibc uses a pool of threads, not one thread per operation.
> All requests against a single file descriptor are served sequentially,
> while for different fds they are served by different threads unless aio
> thread limit has been reached, in which case they are queued too.

Thanks for the clarification.
What is the aio thread limit like ? 

> 
>   b. Pool of threads
>         - have a pool of threads servicing an aio request queue for the
>           task - tradeof between degree of concurrency/utilization and
>           resource consumption.
> 
> 	Jakub