Is it the API that is completed, or is there an implementation written already?
The API specification has been completed so now people can implement if there is interest. The API is part of the Unix branding effort done within the OpenGroup and is available to all for free. Given the desire to implement open standards within the open source community, this would seem like a logical API to support on Linux. How this is actually started / implemented on Linux is an open question. My main reason for providing the spec notification availability here is that the socket extensions when combined with SDP will provide optimum performance when used in conjunction with RDMA interconnects while providing a fairly familiar interface to most network application writers. For those that have implemented MPI over Sockets (not all have done this), this would also provide a cleaner mapping and still allow transparent access to RDMA with minimum performance impact.
Mike
-JE
On Thu, 2005-01-06 at 10:31 -0800, Michael Krause wrote:
>
> FYI.....The specification can be found at:
>
> http://www.opengroup.org/bookstore/catalog/c050.htm
>
> Use of this new interface will enable Sockets based applications to
> fully exploit the performance of RDMA interconnects through the SDP
> wire protocol. This API also provides explicit memory management
> taking some of the guesswork out of this thorny problem which can
> result in some performance loss and implementation complexity within
> the SDP layer.
>
> Mike
>
>
>
>
>
> Extended Sockets API (ES-API), Issue 1.0
> The Extended Sockets API (ES-API) Technical Standard provides
> extensions to the traditional socket API to support improved
> efficiency in network programming. The ES-API includes: synchronous IO
> and control operations on sockets; event queue-based management of
> asynchronous operations; and pre-registering of memory regions that
> will be the subject of IO operations. These facilities are intended to
> support: improved efficiency when dealing with high numbers of socket
> file descriptors; 'zero-copy' transmit and receive operations; and
> improved buffer management. The ES-API also includes routines that
> provide asynchronous IO and control operations, asynchronous operation
> management, and memory registration functions for applications
> manipulating sockets.
>
>
>
> Bibliographic Details
> Consortium Specifications
>
> Catalog number C050
> ISBN 1931624526
> Jan 2005
>
> OO. 72 pages.
>
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