User`s guide

R2008b

14-2

MATLAB Compiler Product Support for Parallel Computing Toolbox

Applications

This release offers the ability to convert Parallel Computing Toolbox applications, using

MATLAB Compiler, into executables and shared libraries that can access MATLAB

Distributed Computing Server. For information on this update to MATLAB Compiler, see

Applications Created with Parallel Computing Toolbox Can Be Compiled.

Limitations

• MATLAB Compiler does not support configurations that use the local scheduler or

local workers (i.e., workers that run locally on the desktop machine running the

MATLAB client session).

•

Compiled Parallel Computing Toolbox applications do not support Simulink

software. For a list of other unsupported products, see the Web page http://

www.mathworks.com/products/ineligible_programs/.

• When workers are running a task from compiled code, they can execute only compiled

code and toolbox code. They cannot execute functions contained in the current

directory. Batch and MATLAB pool jobs attempt to change the worker working

directory to the client working directory. When noncompiled files in the current

directory conflict with compiled versions (for example, files with different extensions),

an error is thrown.

spmd Construct

A new single program multiple data (spmd) language construct allows enhanced

interleaving of serial and parallel programming, with interlab communication.

The general form of an spmd statement is:

spmd

end

The block of code represented by <statements> executes in parallel on workers in the

MATLAB pool. Data on the labs is available for access from the client via Composite

objects. For more information, see the spmd reference page and Distributing Arrays and

Running SPMD.