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

[Jakub Jelinek]

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.

  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