> >CRPC-TR93205-S: Automatic Data Alignment and Distribution for Loosely 
> >                Synchronous Problems in an Interactive Programming Environment



> >
> >Keywords:
> >
> >  interactive programming environment; Fortran D; loosely synchronous
> >  problems; automatic data layout; automatic alignment; dynamic remapping; 
> >  automatic distribution; distributed-memory machines; search space approach; 
> >  static performance estimation


> >Abstract:
> >
> >An approach to distributed memory parallel programming that has
> >recently become popular is one where the programmer explicitly
> >specifies the data layout using language extensions, and
> >a compiler generates all the communication. While this frees the
> >programmer from the tedium of thinking about message-passing, no
> >assistance is provided in determining the data layout scheme
> >that gives a satisfactory performance on the target machine.
> >We wish to provide automatic data alignment and distribution 
> >techniques for a large class of scientific computations, known
> >in the literature as {\em loosely synchronous problems}.
> >
> >We propose an interactive software tool that allows the user to select 
> >regions of the sequential input program, then responds with a
> >data decomposition scheme and diagnostic information for the
> >selected region.  The proposed tool allows the user to obtain insights
> >into the characteristics of the program executing on a distributed
> >memory machine and the behavior of the underlying compilation
> >system without actually compiling and executing the program on the
> >machine.
> >